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/*****************************************************************************
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Copyright (c) 2000, 2011, MySQL AB & Innobase Oy. All Rights Reserved.
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Copyright (c) 2008, 2009 Google Inc.
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Copyright (c) 2009, Percona Inc.
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Portions of this file contain modifications contributed and copyrighted by
Google, Inc. Those modifications are gratefully acknowledged and are described
briefly in the InnoDB documentation. The contributions by Google are
incorporated with their permission, and subject to the conditions contained in
the file COPYING.Google.
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Portions of this file contain modifications contributed and copyrighted
by Percona Inc.. Those modifications are
gratefully acknowledged and are described briefly in the InnoDB
documentation. The contributions by Percona Inc. are incorporated with
their permission, and subject to the conditions contained in the file
COPYING.Percona.

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This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA

*****************************************************************************/
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/* TODO list for the InnoDB handler in 5.0:
  - fix savepoint functions to use savepoint storage area
  - Find out what kind of problems the OS X case-insensitivity causes to
    table and database names; should we 'normalize' the names like we do
    in Windows?
*/

#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation				// gcc: Class implementation
#endif

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#include <sql_table.h>	// explain_filename, nz2, EXPLAIN_PARTITIONS_AS_COMMENT,
			// EXPLAIN_FILENAME_MAX_EXTRA_LENGTH
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#include <sql_acl.h>	// PROCESS_ACL
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#include <m_ctype.h>
#include <mysys_err.h>
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#include <mysql/plugin.h>
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#include <mysql/innodb_priv.h>
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#include <mysql/psi/psi.h>
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/** @file ha_innodb.cc */

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/* Include necessary InnoDB headers */
extern "C" {
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#include "univ.i"
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#include "buf0lru.h"
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#include "btr0sea.h"
#include "os0file.h"
#include "os0thread.h"
#include "srv0start.h"
#include "srv0srv.h"
#include "trx0roll.h"
#include "trx0trx.h"
#include "trx0sys.h"
#include "mtr0mtr.h"
#include "row0ins.h"
#include "row0mysql.h"
#include "row0sel.h"
#include "row0upd.h"
#include "log0log.h"
#include "lock0lock.h"
#include "dict0crea.h"
#include "btr0cur.h"
#include "btr0btr.h"
#include "fsp0fsp.h"
#include "sync0sync.h"
#include "fil0fil.h"
#include "trx0xa.h"
#include "row0merge.h"
#include "thr0loc.h"
#include "dict0boot.h"
#include "ha_prototypes.h"
#include "ut0mem.h"
#include "ibuf0ibuf.h"
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}

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#include "ha_innodb.h"
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#include "i_s.h"
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# ifndef MYSQL_PLUGIN_IMPORT
#  define MYSQL_PLUGIN_IMPORT /* nothing */
# endif /* MYSQL_PLUGIN_IMPORT */
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/** to protect innobase_open_files */
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static mysql_mutex_t innobase_share_mutex;
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/** to force correct commit order in binlog */
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static mysql_mutex_t prepare_commit_mutex;
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static ulong commit_threads = 0;
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static mysql_mutex_t commit_threads_m;
static mysql_cond_t commit_cond;
static mysql_mutex_t commit_cond_m;
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static bool innodb_inited = 0;
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#define INSIDE_HA_INNOBASE_CC

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/* In the Windows plugin, the return value of current_thd is
undefined.  Map it to NULL. */
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#define EQ_CURRENT_THD(thd) ((thd) == current_thd)

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static struct handlerton* innodb_hton_ptr;
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static const long AUTOINC_OLD_STYLE_LOCKING = 0;
static const long AUTOINC_NEW_STYLE_LOCKING = 1;
static const long AUTOINC_NO_LOCKING = 2;

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static long innobase_mirrored_log_groups, innobase_log_files_in_group,
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	innobase_log_buffer_size,
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	innobase_additional_mem_pool_size, innobase_file_io_threads,
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	innobase_force_recovery, innobase_open_files,
	innobase_autoinc_lock_mode;
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static ulong innobase_commit_concurrency = 0;
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static ulong innobase_read_io_threads;
static ulong innobase_write_io_threads;
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static long innobase_buffer_pool_instances = 1;
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static long long innobase_buffer_pool_size, innobase_log_file_size;
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/** Percentage of the buffer pool to reserve for 'old' blocks.
Connected to buf_LRU_old_ratio. */
static uint innobase_old_blocks_pct;

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/* The default values for the following char* start-up parameters
are determined in innobase_init below: */
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static char*	innobase_data_home_dir			= NULL;
static char*	innobase_data_file_path			= NULL;
static char*	innobase_log_group_home_dir		= NULL;
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static char*	innobase_file_format_name		= NULL;
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static char*	innobase_change_buffering		= NULL;
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/* The highest file format being used in the database. The value can be
set by user, however, it will be adjusted to the newer file format if
a table of such format is created/opened. */
static char*	innobase_file_format_max		= NULL;
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static char*	innobase_file_flush_method		= NULL;
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/* Below we have boolean-valued start-up parameters, and their default
values */

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static ulong	innobase_fast_shutdown			= 1;
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static my_bool	innobase_file_format_check		= TRUE;
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#ifdef UNIV_LOG_ARCHIVE
static my_bool	innobase_log_archive			= FALSE;
static char*	innobase_log_arch_dir			= NULL;
#endif /* UNIV_LOG_ARCHIVE */
static my_bool	innobase_use_doublewrite		= TRUE;
static my_bool	innobase_use_checksums			= TRUE;
static my_bool	innobase_locks_unsafe_for_binlog	= FALSE;
static my_bool	innobase_rollback_on_timeout		= FALSE;
static my_bool	innobase_create_status_file		= FALSE;
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static my_bool	innobase_stats_on_metadata		= TRUE;
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static char*	internal_innobase_data_file_path	= NULL;
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static char*	innodb_version_str = (char*) INNODB_VERSION_STR;

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/** Possible values for system variable "innodb_stats_method". The values
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are defined the same as its corresponding MyISAM system variable
"myisam_stats_method"(see "myisam_stats_method_names"), for better usability */
static const char* innodb_stats_method_names[] = {
	"nulls_equal",
	"nulls_unequal",
	"nulls_ignored",
	NullS
};

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/** Used to define an enumerate type of the system variable innodb_stats_method.
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This is the same as "myisam_stats_method_typelib" */
static TYPELIB innodb_stats_method_typelib = {
	array_elements(innodb_stats_method_names) - 1,
	"innodb_stats_method_typelib",
	innodb_stats_method_names,
	NULL
};

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/* The following counter is used to convey information to InnoDB
about server activity: in selects it is not sensible to call
srv_active_wake_master_thread after each fetch or search, we only do
it every INNOBASE_WAKE_INTERVAL'th step. */

#define INNOBASE_WAKE_INTERVAL	32
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static ulong	innobase_active_counter	= 0;
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static hash_table_t*	innobase_open_tables;
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/** Allowed values of innodb_change_buffering */
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static const char* innobase_change_buffering_values[IBUF_USE_COUNT] = {
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	"none",		/* IBUF_USE_NONE */
	"inserts",	/* IBUF_USE_INSERT */
	"deletes",	/* IBUF_USE_DELETE_MARK */
	"changes",	/* IBUF_USE_INSERT_DELETE_MARK */
	"purges",	/* IBUF_USE_DELETE */
	"all"		/* IBUF_USE_ALL */
};

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#ifdef HAVE_PSI_INTERFACE
/* Keys to register pthread mutexes/cond in the current file with
performance schema */
static mysql_pfs_key_t	innobase_share_mutex_key;
static mysql_pfs_key_t	prepare_commit_mutex_key;
static mysql_pfs_key_t	commit_threads_m_key;
static mysql_pfs_key_t	commit_cond_mutex_key;
static mysql_pfs_key_t	commit_cond_key;

static PSI_mutex_info	all_pthread_mutexes[] = {
        {&commit_threads_m_key, "commit_threads_m", 0},
        {&commit_cond_mutex_key, "commit_cond_mutex", 0},
        {&innobase_share_mutex_key, "innobase_share_mutex", 0},
        {&prepare_commit_mutex_key, "prepare_commit_mutex", 0}
};

static PSI_cond_info	all_innodb_conds[] = {
	{&commit_cond_key, "commit_cond", 0}
};

# ifdef UNIV_PFS_MUTEX
/* all_innodb_mutexes array contains mutexes that are
performance schema instrumented if "UNIV_PFS_MUTEX"
is defined */
static PSI_mutex_info all_innodb_mutexes[] = {
	{&autoinc_mutex_key, "autoinc_mutex", 0},
	{&btr_search_enabled_mutex_key, "btr_search_enabled_mutex", 0},
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#  ifndef PFS_SKIP_BUFFER_MUTEX_RWLOCK
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	{&buffer_block_mutex_key, "buffer_block_mutex", 0},
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#  endif /* !PFS_SKIP_BUFFER_MUTEX_RWLOCK */
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	{&buf_pool_mutex_key, "buf_pool_mutex", 0},
	{&buf_pool_zip_mutex_key, "buf_pool_zip_mutex", 0},
	{&cache_last_read_mutex_key, "cache_last_read_mutex", 0},
	{&dict_foreign_err_mutex_key, "dict_foreign_err_mutex", 0},
	{&dict_sys_mutex_key, "dict_sys_mutex", 0},
	{&file_format_max_mutex_key, "file_format_max_mutex", 0},
	{&fil_system_mutex_key, "fil_system_mutex", 0},
	{&flush_list_mutex_key, "flush_list_mutex", 0},
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	{&log_flush_order_mutex_key, "log_flush_order_mutex", 0},
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	{&hash_table_mutex_key, "hash_table_mutex", 0},
	{&ibuf_bitmap_mutex_key, "ibuf_bitmap_mutex", 0},
	{&ibuf_mutex_key, "ibuf_mutex", 0},
	{&ibuf_pessimistic_insert_mutex_key,
		 "ibuf_pessimistic_insert_mutex", 0},
	{&kernel_mutex_key, "kernel_mutex", 0},
	{&log_sys_mutex_key, "log_sys_mutex", 0},
#  ifdef UNIV_MEM_DEBUG
	{&mem_hash_mutex_key, "mem_hash_mutex", 0},
#  endif /* UNIV_MEM_DEBUG */
	{&mem_pool_mutex_key, "mem_pool_mutex", 0},
	{&mutex_list_mutex_key, "mutex_list_mutex", 0},
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	{&purge_sys_bh_mutex_key, "purge_sys_bh_mutex", 0},
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	{&recv_sys_mutex_key, "recv_sys_mutex", 0},
	{&rseg_mutex_key, "rseg_mutex", 0},
#  ifdef UNIV_SYNC_DEBUG
	{&rw_lock_debug_mutex_key, "rw_lock_debug_mutex", 0},
#  endif /* UNIV_SYNC_DEBUG */
	{&rw_lock_list_mutex_key, "rw_lock_list_mutex", 0},
	{&rw_lock_mutex_key, "rw_lock_mutex", 0},
	{&srv_dict_tmpfile_mutex_key, "srv_dict_tmpfile_mutex", 0},
	{&srv_innodb_monitor_mutex_key, "srv_innodb_monitor_mutex", 0},
	{&srv_misc_tmpfile_mutex_key, "srv_misc_tmpfile_mutex", 0},
	{&srv_monitor_file_mutex_key, "srv_monitor_file_mutex", 0},
	{&syn_arr_mutex_key, "syn_arr_mutex", 0},
#  ifdef UNIV_SYNC_DEBUG
	{&sync_thread_mutex_key, "sync_thread_mutex", 0},
#  endif /* UNIV_SYNC_DEBUG */
	{&trx_doublewrite_mutex_key, "trx_doublewrite_mutex", 0},
	{&thr_local_mutex_key, "thr_local_mutex", 0},
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	{&trx_undo_mutex_key, "trx_undo_mutex", 0}
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};
# endif /* UNIV_PFS_MUTEX */

# ifdef UNIV_PFS_RWLOCK
/* all_innodb_rwlocks array contains rwlocks that are
performance schema instrumented if "UNIV_PFS_RWLOCK"
is defined */
static PSI_rwlock_info all_innodb_rwlocks[] = {
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#  ifdef UNIV_LOG_ARCHIVE
	{&archive_lock_key, "archive_lock", 0},
#  endif /* UNIV_LOG_ARCHIVE */
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	{&btr_search_latch_key, "btr_search_latch", 0},
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#  ifndef PFS_SKIP_BUFFER_MUTEX_RWLOCK
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	{&buf_block_lock_key, "buf_block_lock", 0},
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#  endif /* !PFS_SKIP_BUFFER_MUTEX_RWLOCK */
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#  ifdef UNIV_SYNC_DEBUG
	{&buf_block_debug_latch_key, "buf_block_debug_latch", 0},
#  endif /* UNIV_SYNC_DEBUG */
	{&dict_operation_lock_key, "dict_operation_lock", 0},
	{&fil_space_latch_key, "fil_space_latch", 0},
	{&checkpoint_lock_key, "checkpoint_lock", 0},
	{&trx_i_s_cache_lock_key, "trx_i_s_cache_lock", 0},
	{&trx_purge_latch_key, "trx_purge_latch", 0},
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	{&index_tree_rw_lock_key, "index_tree_rw_lock", 0},
	{&dict_table_stats_latch_key, "dict_table_stats", 0}
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};
# endif /* UNIV_PFS_RWLOCK */

# ifdef UNIV_PFS_THREAD
/* all_innodb_threads array contains threads that are
performance schema instrumented if "UNIV_PFS_THREAD"
is defined */
static PSI_thread_info	all_innodb_threads[] = {
	{&trx_rollback_clean_thread_key, "trx_rollback_clean_thread", 0},
	{&io_handler_thread_key, "io_handler_thread", 0},
	{&srv_lock_timeout_thread_key, "srv_lock_timeout_thread", 0},
	{&srv_error_monitor_thread_key, "srv_error_monitor_thread", 0},
	{&srv_monitor_thread_key, "srv_monitor_thread", 0},
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	{&srv_master_thread_key, "srv_master_thread", 0},
	{&srv_purge_thread_key, "srv_purge_thread", 0}
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};
# endif /* UNIV_PFS_THREAD */

# ifdef UNIV_PFS_IO
/* all_innodb_files array contains the type of files that are
performance schema instrumented if "UNIV_PFS_IO" is defined */
static PSI_file_info	all_innodb_files[] = {
	{&innodb_file_data_key, "innodb_data_file", 0},
	{&innodb_file_log_key, "innodb_log_file", 0},
	{&innodb_file_temp_key, "innodb_temp_file", 0}
};
# endif /* UNIV_PFS_IO */
#endif /* HAVE_PSI_INTERFACE */

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static INNOBASE_SHARE *get_share(const char *table_name);
static void free_share(INNOBASE_SHARE *share);
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static int innobase_close_connection(handlerton *hton, THD* thd);
static int innobase_commit(handlerton *hton, THD* thd, bool all);
static int innobase_rollback(handlerton *hton, THD* thd, bool all);
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static int innobase_rollback_to_savepoint(handlerton *hton, THD* thd,
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           void *savepoint);
static int innobase_savepoint(handlerton *hton, THD* thd, void *savepoint);
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static int innobase_release_savepoint(handlerton *hton, THD* thd,
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           void *savepoint);
static handler *innobase_create_handler(handlerton *hton,
                                        TABLE_SHARE *table,
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                                        MEM_ROOT *mem_root);
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/* "GEN_CLUST_INDEX" is the name reserved for Innodb default
system primary index. */
static const char innobase_index_reserve_name[]= "GEN_CLUST_INDEX";

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/** @brief Initialize the default value of innodb_commit_concurrency.

Once InnoDB is running, the innodb_commit_concurrency must not change
from zero to nonzero. (Bug #42101)

The initial default value is 0, and without this extra initialization,
SET GLOBAL innodb_commit_concurrency=DEFAULT would set the parameter
to 0, even if it was initially set to nonzero at the command line
or configuration file. */
static
void
innobase_commit_concurrency_init_default(void);
/*==========================================*/

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/************************************************************//**
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Validate the file format name and return its corresponding id.
@return	valid file format id */
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static
uint
innobase_file_format_name_lookup(
/*=============================*/
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	const char*	format_name);		/*!< in: pointer to file format
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						name */
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/************************************************************//**
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Validate the file format check config parameters, as a side effect it
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sets the srv_max_file_format_at_startup variable.
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@return	the format_id if valid config value, otherwise, return -1 */
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static
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int
innobase_file_format_validate_and_set(
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/*==================================*/
	const char*	format_max);		/*!< in: parameter value */
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/****************************************************************//**
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Return alter table flags supported in an InnoDB database. */
static
uint
innobase_alter_table_flags(
/*=======================*/
	uint	flags);

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static const char innobase_hton_name[]= "InnoDB";
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/*************************************************************//**
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Check for a valid value of innobase_commit_concurrency.
@return	0 for valid innodb_commit_concurrency */
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static
int
innobase_commit_concurrency_validate(
/*=================================*/
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	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
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						variable */
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	void*				save,	/*!< out: immediate result
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						for update function */
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	struct st_mysql_value*		value)	/*!< in: incoming string */
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{
	long long	intbuf;
	ulong		commit_concurrency;

	DBUG_ENTER("innobase_commit_concurrency_validate");

	if (value->val_int(value, &intbuf)) {
		/* The value is NULL. That is invalid. */
		DBUG_RETURN(1);
	}

	*reinterpret_cast<ulong*>(save) = commit_concurrency
		= static_cast<ulong>(intbuf);

	/* Allow the value to be updated, as long as it remains zero
	or nonzero. */
	DBUG_RETURN(!(!commit_concurrency == !innobase_commit_concurrency));
}

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static MYSQL_THDVAR_BOOL(support_xa, PLUGIN_VAR_OPCMDARG,
  "Enable InnoDB support for the XA two-phase commit",
  /* check_func */ NULL, /* update_func */ NULL,
  /* default */ TRUE);

static MYSQL_THDVAR_BOOL(table_locks, PLUGIN_VAR_OPCMDARG,
  "Enable InnoDB locking in LOCK TABLES",
  /* check_func */ NULL, /* update_func */ NULL,
  /* default */ TRUE);

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static MYSQL_THDVAR_BOOL(strict_mode, PLUGIN_VAR_OPCMDARG,
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  "Use strict mode when evaluating create options.",
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  NULL, NULL, FALSE);
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static MYSQL_THDVAR_ULONG(lock_wait_timeout, PLUGIN_VAR_RQCMDARG,
  "Timeout in seconds an InnoDB transaction may wait for a lock before being rolled back. Values above 100000000 disable the timeout.",
  NULL, NULL, 50, 1, 1024 * 1024 * 1024, 0);

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static handler *innobase_create_handler(handlerton *hton,
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                                        TABLE_SHARE *table,
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                                        MEM_ROOT *mem_root)
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{
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  return new (mem_root) ha_innobase(hton, table);
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}

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/*******************************************************************//**
This function is used to prepare an X/Open XA distributed transaction.
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@return	0 or error number */
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static
int
innobase_xa_prepare(
/*================*/
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        handlerton*	hton,	/*!< in: InnoDB handlerton */
	THD*		thd,	/*!< in: handle to the MySQL thread of
				the user whose XA transaction should
				be prepared */
	bool		all);	/*!< in: TRUE - commit transaction
				FALSE - the current SQL statement
				ended */
/*******************************************************************//**
This function is used to recover X/Open XA distributed transactions.
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@return	number of prepared transactions stored in xid_list */
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static
int
innobase_xa_recover(
/*================*/
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	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid_list,/*!< in/out: prepared transactions */
	uint		len);	/*!< in: number of slots in xid_list */
/*******************************************************************//**
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This function is used to commit one X/Open XA distributed transaction
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which is in the prepared state
@return	0 or error number */
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static
int
innobase_commit_by_xid(
/*===================*/
	handlerton* hton,
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	XID*	xid);	/*!< in: X/Open XA transaction identification */
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/*******************************************************************//**
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This function is used to rollback one X/Open XA distributed transaction
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which is in the prepared state
@return	0 or error number */
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static
int
innobase_rollback_by_xid(
/*=====================*/
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	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid);	/*!< in: X/Open XA transaction
				identification */
/*******************************************************************//**
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Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
This consistent view is then used inside of MySQL when accessing records
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using a cursor.
@return	pointer to cursor view or NULL */
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static
void*
innobase_create_cursor_view(
/*========================*/
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	handlerton*	hton,	/*!< in: innobase hton */
	THD*		thd);	/*!< in: user thread handle */
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/*******************************************************************//**
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Set the given consistent cursor view to a transaction which is created
if the corresponding MySQL thread still lacks one. If the given
consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
static
void
innobase_set_cursor_view(
/*=====================*/
	handlerton* hton,
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	THD*	thd,	/*!< in: user thread handle */
	void*	curview);/*!< in: Consistent cursor view to be set */
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/*******************************************************************//**
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Close the given consistent cursor view of a transaction and restore
global read view to a transaction read view. Transaction is created if the
corresponding MySQL thread still lacks one. */
static
void
innobase_close_cursor_view(
/*=======================*/
	handlerton* hton,
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	THD*	thd,	/*!< in: user thread handle */
	void*	curview);/*!< in: Consistent read view to be closed */
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/*****************************************************************//**
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Removes all tables in the named database inside InnoDB. */
static
void
innobase_drop_database(
/*===================*/
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	handlerton* hton, /*!< in: handlerton of Innodb */
	char*	path);	/*!< in: database path; inside InnoDB the name
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			of the last directory in the path is used as
			the database name: for example, in 'mysql/data/test'
			the database name is 'test' */
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/*******************************************************************//**
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Closes an InnoDB database. */
static
int
innobase_end(handlerton *hton, ha_panic_function type);

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/*****************************************************************//**
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Creates an InnoDB transaction struct for the thd if it does not yet have one.
Starts a new InnoDB transaction if a transaction is not yet started. And
assigns a new snapshot for a consistent read if the transaction does not yet
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have one.
@return	0 */
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static
int
innobase_start_trx_and_assign_read_view(
/*====================================*/
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			/* out: 0 */
	handlerton* hton, /* in: Innodb handlerton */
	THD*	thd);	/* in: MySQL thread handle of the user for whom
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			the transaction should be committed */
567
/****************************************************************//**
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Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
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the logs, and the name of this function should be innobase_checkpoint.
@return	TRUE if error */
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static
bool
innobase_flush_logs(
/*================*/
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	handlerton*	hton);	/*!< in: InnoDB handlerton */
576

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/************************************************************************//**
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Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
Monitor to the client. */
static
bool
innodb_show_status(
/*===============*/
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	handlerton*	hton,	/*!< in: the innodb handlerton */
	THD*	thd,	/*!< in: the MySQL query thread of the caller */
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	stat_print_fn *stat_print);
static
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bool innobase_show_status(handlerton *hton, THD* thd,
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                          stat_print_fn* stat_print,
                          enum ha_stat_type stat_type);
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/*****************************************************************//**
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Commits a transaction in an InnoDB database. */
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static
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void
innobase_commit_low(
/*================*/
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	trx_t*	trx);	/*!< in: transaction handle */
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static SHOW_VAR innodb_status_variables[]= {
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  {"buffer_pool_pages_data",
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  (char*) &export_vars.innodb_buffer_pool_pages_data,	  SHOW_LONG},
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  {"buffer_pool_pages_dirty",
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  (char*) &export_vars.innodb_buffer_pool_pages_dirty,	  SHOW_LONG},
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  {"buffer_pool_pages_flushed",
  (char*) &export_vars.innodb_buffer_pool_pages_flushed,  SHOW_LONG},
  {"buffer_pool_pages_free",
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  (char*) &export_vars.innodb_buffer_pool_pages_free,	  SHOW_LONG},
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#ifdef UNIV_DEBUG
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  {"buffer_pool_pages_latched",
  (char*) &export_vars.innodb_buffer_pool_pages_latched,  SHOW_LONG},
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#endif /* UNIV_DEBUG */
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  {"buffer_pool_pages_misc",
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  (char*) &export_vars.innodb_buffer_pool_pages_misc,	  SHOW_LONG},
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  {"buffer_pool_pages_total",
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  (char*) &export_vars.innodb_buffer_pool_pages_total,	  SHOW_LONG},
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  {"buffer_pool_read_ahead",
  (char*) &export_vars.innodb_buffer_pool_read_ahead,	  SHOW_LONG},
  {"buffer_pool_read_ahead_evicted",
  (char*) &export_vars.innodb_buffer_pool_read_ahead_evicted, SHOW_LONG},
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  {"buffer_pool_read_requests",
  (char*) &export_vars.innodb_buffer_pool_read_requests,  SHOW_LONG},
  {"buffer_pool_reads",
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  (char*) &export_vars.innodb_buffer_pool_reads,	  SHOW_LONG},
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  {"buffer_pool_wait_free",
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  (char*) &export_vars.innodb_buffer_pool_wait_free,	  SHOW_LONG},
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  {"buffer_pool_write_requests",
  (char*) &export_vars.innodb_buffer_pool_write_requests, SHOW_LONG},
  {"data_fsyncs",
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  (char*) &export_vars.innodb_data_fsyncs,		  SHOW_LONG},
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  {"data_pending_fsyncs",
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  (char*) &export_vars.innodb_data_pending_fsyncs,	  SHOW_LONG},
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  {"data_pending_reads",
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  (char*) &export_vars.innodb_data_pending_reads,	  SHOW_LONG},
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  {"data_pending_writes",
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  (char*) &export_vars.innodb_data_pending_writes,	  SHOW_LONG},
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  {"data_read",
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  (char*) &export_vars.innodb_data_read,		  SHOW_LONG},
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  {"data_reads",
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  (char*) &export_vars.innodb_data_reads,		  SHOW_LONG},
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  {"data_writes",
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  (char*) &export_vars.innodb_data_writes,		  SHOW_LONG},
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  {"data_written",
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  (char*) &export_vars.innodb_data_written,		  SHOW_LONG},
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  {"dblwr_pages_written",
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  (char*) &export_vars.innodb_dblwr_pages_written,	  SHOW_LONG},
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  {"dblwr_writes",
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  (char*) &export_vars.innodb_dblwr_writes,		  SHOW_LONG},
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  {"have_atomic_builtins",
  (char*) &export_vars.innodb_have_atomic_builtins,	  SHOW_BOOL},
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  {"log_waits",
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  (char*) &export_vars.innodb_log_waits,		  SHOW_LONG},
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  {"log_write_requests",
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  (char*) &export_vars.innodb_log_write_requests,	  SHOW_LONG},
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  {"log_writes",
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  (char*) &export_vars.innodb_log_writes,		  SHOW_LONG},
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  {"os_log_fsyncs",
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  (char*) &export_vars.innodb_os_log_fsyncs,		  SHOW_LONG},
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  {"os_log_pending_fsyncs",
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  (char*) &export_vars.innodb_os_log_pending_fsyncs,	  SHOW_LONG},
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  {"os_log_pending_writes",
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  (char*) &export_vars.innodb_os_log_pending_writes,	  SHOW_LONG},
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  {"os_log_written",
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  (char*) &export_vars.innodb_os_log_written,		  SHOW_LONG},
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  {"page_size",
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  (char*) &export_vars.innodb_page_size,		  SHOW_LONG},
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  {"pages_created",
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  (char*) &export_vars.innodb_pages_created,		  SHOW_LONG},
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  {"pages_read",
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  (char*) &export_vars.innodb_pages_read,		  SHOW_LONG},
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  {"pages_written",
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  (char*) &export_vars.innodb_pages_written,		  SHOW_LONG},
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  {"row_lock_current_waits",
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  (char*) &export_vars.innodb_row_lock_current_waits,	  SHOW_LONG},
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  {"row_lock_time",
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  (char*) &export_vars.innodb_row_lock_time,		  SHOW_LONGLONG},
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  {"row_lock_time_avg",
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  (char*) &export_vars.innodb_row_lock_time_avg,	  SHOW_LONG},
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  {"row_lock_time_max",
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  (char*) &export_vars.innodb_row_lock_time_max,	  SHOW_LONG},
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  {"row_lock_waits",
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  (char*) &export_vars.innodb_row_lock_waits,		  SHOW_LONG},
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  {"rows_deleted",
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  (char*) &export_vars.innodb_rows_deleted,		  SHOW_LONG},
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  {"rows_inserted",
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  (char*) &export_vars.innodb_rows_inserted,		  SHOW_LONG},
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  {"rows_read",
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  (char*) &export_vars.innodb_rows_read,		  SHOW_LONG},
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  {"rows_updated",
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  (char*) &export_vars.innodb_rows_updated,		  SHOW_LONG},
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  {"truncated_status_writes",
  (char*) &export_vars.innodb_truncated_status_writes,	SHOW_LONG},
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  {NullS, NullS, SHOW_LONG}
};
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/* General functions */

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/******************************************************************//**
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Returns true if the thread is the replication thread on the slave
server. Used in srv_conc_enter_innodb() to determine if the thread
should be allowed to enter InnoDB - the replication thread is treated
differently than other threads. Also used in
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srv_conc_force_exit_innodb().
@return	true if thd is the replication thread */
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extern "C" UNIV_INTERN
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ibool
thd_is_replication_slave_thread(
/*============================*/
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	void*	thd)	/*!< in: thread handle (THD*) */
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{
	return((ibool) thd_slave_thread((THD*) thd));
}

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/******************************************************************//**
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Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
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static inline
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void
innodb_srv_conc_enter_innodb(
/*=========================*/
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	trx_t*	trx)	/*!< in: transaction handle */
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{
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	if (UNIV_LIKELY(!srv_thread_concurrency)) {
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		return;
	}

	srv_conc_enter_innodb(trx);
}

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/******************************************************************//**
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Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
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static inline
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void
innodb_srv_conc_exit_innodb(
/*========================*/
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	trx_t*	trx)	/*!< in: transaction handle */
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{
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	if (UNIV_LIKELY(!trx->declared_to_be_inside_innodb)) {
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		return;
	}

	srv_conc_exit_innodb(trx);
}

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/******************************************************************//**
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Releases possible search latch and InnoDB thread FIFO ticket. These should
be released at each SQL statement end, and also when mysqld passes the
control to the client. It does no harm to release these also in the middle
of an SQL statement. */
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static inline
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void
innobase_release_stat_resources(
/*============================*/
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	trx_t*	trx)	/*!< in: transaction object */
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{
	if (trx->has_search_latch) {
		trx_search_latch_release_if_reserved(trx);
	}

	if (trx->declared_to_be_inside_innodb) {
		/* Release our possible ticket in the FIFO */

		srv_conc_force_exit_innodb(trx);
	}
}

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/******************************************************************//**
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Returns true if the transaction this thread is processing has edited
non-transactional tables. Used by the deadlock detector when deciding
which transaction to rollback in case of a deadlock - we try to avoid
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rolling back transactions that have edited non-transactional tables.
@return	true if non-transactional tables have been edited */
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extern "C" UNIV_INTERN
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ibool
thd_has_edited_nontrans_tables(
/*===========================*/
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	void*	thd)	/*!< in: thread handle (THD*) */
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{
	return((ibool) thd_non_transactional_update((THD*) thd));
}

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/******************************************************************//**
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Returns true if the thread is executing a SELECT statement.
@return	true if thd is executing SELECT */
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extern "C" UNIV_INTERN
ibool
thd_is_select(
/*==========*/
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	const void*	thd)	/*!< in: thread handle (THD*) */
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{
	return(thd_sql_command((const THD*) thd) == SQLCOM_SELECT);
}

797
/******************************************************************//**
798
Returns true if the thread supports XA,
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global value of innodb_supports_xa if thd is NULL.
@return	true if thd has XA support */
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extern "C" UNIV_INTERN
802
ibool
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thd_supports_xa(
/*============*/
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	void*	thd)	/*!< in: thread handle (THD*), or NULL to query
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			the global innodb_supports_xa */
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{
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	return(THDVAR((THD*) thd, support_xa));
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}

811
/******************************************************************//**
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Returns the lock wait timeout for the current connection.
@return	the lock wait timeout, in seconds */
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extern "C" UNIV_INTERN
ulong
thd_lock_wait_timeout(
/*==================*/
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	void*	thd)	/*!< in: thread handle (THD*), or NULL to query
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			the global innodb_lock_wait_timeout */
{
	/* According to <mysql/plugin.h>, passing thd == NULL
	returns the global value of the session variable. */
	return(THDVAR((THD*) thd, lock_wait_timeout));
}

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/******************************************************************//**
Set the time waited for the lock for the current query. */
extern "C" UNIV_INTERN
void
thd_set_lock_wait_time(
/*===================*/
	void*	thd,	/*!< in: thread handle (THD*) */
	ulint	value)	/*!< in: time waited for the lock */
{
	if (thd) {
		thd_storage_lock_wait((THD*)thd, value);
	}
}

840
/********************************************************************//**
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Obtain the InnoDB transaction of a MySQL thread.
@return	reference to transaction pointer */
843
static inline
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trx_t*&
thd_to_trx(
/*=======*/
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	THD*	thd)	/*!< in: MySQL thread */
848
{
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	return(*(trx_t**) thd_ha_data(thd, innodb_hton_ptr));
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}

852
/********************************************************************//**
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Call this function when mysqld passes control to the client. That is to
avoid deadlocks on the adaptive hash S-latch possibly held by thd. For more
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documentation, see handler.cc.
@return	0 */
857
static
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int
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innobase_release_temporary_latches(
/*===============================*/
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	handlerton*	hton,	/*!< in: handlerton */
	THD*		thd)	/*!< in: MySQL thread */
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{
	trx_t*	trx;

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	DBUG_ASSERT(hton == innodb_hton_ptr);

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	if (!innodb_inited) {
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		return(0);
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	}

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	trx = thd_to_trx(thd);
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	if (trx) {
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		innobase_release_stat_resources(trx);
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	}
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	return(0);
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}

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/********************************************************************//**
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Increments innobase_active_counter and every INNOBASE_WAKE_INTERVALth
time calls srv_active_wake_master_thread. This function should be used
when a single database operation may introduce a small need for
server utility activity, like checkpointing. */
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static inline
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void
innobase_active_small(void)
/*=======================*/
{
	innobase_active_counter++;

	if ((innobase_active_counter % INNOBASE_WAKE_INTERVAL) == 0) {
		srv_active_wake_master_thread();
	}
}

898
/********************************************************************//**
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Converts an InnoDB error code to a MySQL error code and also tells to MySQL
about a possible transaction rollback inside InnoDB caused by a lock wait
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timeout or a deadlock.
@return	MySQL error code */
903
extern "C" UNIV_INTERN
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int
convert_error_code_to_mysql(
/*========================*/
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	int	error,	/*!< in: InnoDB error code */
	ulint	flags,	/*!< in: InnoDB table flags, or 0 */
	THD*	thd)	/*!< in: user thread handle or NULL */
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{
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	switch (error) {
	case DB_SUCCESS:
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		return(0);

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	case DB_INTERRUPTED:
		my_error(ER_QUERY_INTERRUPTED, MYF(0));
		/* fall through */
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	case DB_FOREIGN_EXCEED_MAX_CASCADE:
		push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				    HA_ERR_ROW_IS_REFERENCED,
				    "InnoDB: Cannot delete/update "
				    "rows with cascading foreign key "
				    "constraints that exceed max "
				    "depth of %d. Please "
				    "drop extra constraints and try "
				    "again", DICT_FK_MAX_RECURSIVE_LOAD);

		/* fall through */

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	case DB_ERROR:
	default:
		return(-1); /* unspecified error */
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	case DB_DUPLICATE_KEY:
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		/* Be cautious with returning this error, since
		mysql could re-enter the storage layer to get
		duplicated key info, the operation requires a
		valid table handle and/or transaction information,
		which might not always be available in the error
		handling stage. */
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		return(HA_ERR_FOUND_DUPP_KEY);
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	case DB_FOREIGN_DUPLICATE_KEY:
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		return(HA_ERR_FOREIGN_DUPLICATE_KEY);

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	case DB_MISSING_HISTORY:
		return(HA_ERR_TABLE_DEF_CHANGED);

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	case DB_RECORD_NOT_FOUND:
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		return(HA_ERR_NO_ACTIVE_RECORD);
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	case DB_DEADLOCK:
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		/* Since we rolled back the whole transaction, we must
		tell it also to MySQL so that MySQL knows to empty the
		cached binlog for this transaction */
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		if (thd) {
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			thd_mark_transaction_to_rollback(thd, TRUE);
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		}
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		return(HA_ERR_LOCK_DEADLOCK);
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	case DB_LOCK_WAIT_TIMEOUT:
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		/* Starting from 5.0.13, we let MySQL just roll back the
		latest SQL statement in a lock wait timeout. Previously, we
		rolled back the whole transaction. */

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		if (thd) {
			thd_mark_transaction_to_rollback(
				thd, (bool)row_rollback_on_timeout);
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		}

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		return(HA_ERR_LOCK_WAIT_TIMEOUT);
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	case DB_NO_REFERENCED_ROW:
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		return(HA_ERR_NO_REFERENCED_ROW);
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	case DB_ROW_IS_REFERENCED:
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		return(HA_ERR_ROW_IS_REFERENCED);
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	case DB_CANNOT_ADD_CONSTRAINT:
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	case DB_CHILD_NO_INDEX:
	case DB_PARENT_NO_INDEX:
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		return(HA_ERR_CANNOT_ADD_FOREIGN);
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	case DB_CANNOT_DROP_CONSTRAINT:
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		return(HA_ERR_ROW_IS_REFERENCED); /* TODO: This is a bit
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						misleading, a new MySQL error
						code should be introduced */

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	case DB_COL_APPEARS_TWICE_IN_INDEX:
	case DB_CORRUPTION:
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		return(HA_ERR_CRASHED);
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	case DB_OUT_OF_FILE_SPACE:
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		return(HA_ERR_RECORD_FILE_FULL);
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	case DB_TABLE_IS_BEING_USED:
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		return(HA_ERR_WRONG_COMMAND);
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	case DB_TABLE_NOT_FOUND:
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		return(HA_ERR_NO_SUCH_TABLE);
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	case DB_TOO_BIG_RECORD:
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		my_error(ER_TOO_BIG_ROWSIZE, MYF(0),
			 page_get_free_space_of_empty(flags
						      & DICT_TF_COMPACT) / 2);
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		return(HA_ERR_TO_BIG_ROW);
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	case DB_NO_SAVEPOINT:
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		return(HA_ERR_NO_SAVEPOINT);
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	case DB_LOCK_TABLE_FULL:
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		/* Since we rolled back the whole transaction, we must
		tell it also to MySQL so that MySQL knows to empty the
		cached binlog for this transaction */

		if (thd) {
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			thd_mark_transaction_to_rollback(thd, TRUE);
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		}
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		return(HA_ERR_LOCK_TABLE_FULL);
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	case DB_PRIMARY_KEY_IS_NULL:
		return(ER_PRIMARY_CANT_HAVE_NULL);

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	case DB_TOO_MANY_CONCURRENT_TRXS:
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		/* New error code HA_ERR_TOO_MANY_CONCURRENT_TRXS is only
		available in 5.1.38 and later, but the plugin should still
		work with previous versions of MySQL. */
#ifdef HA_ERR_TOO_MANY_CONCURRENT_TRXS
		return(HA_ERR_TOO_MANY_CONCURRENT_TRXS);
#else /* HA_ERR_TOO_MANY_CONCURRENT_TRXS */
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		return(HA_ERR_RECORD_FILE_FULL);
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#endif /* HA_ERR_TOO_MANY_CONCURRENT_TRXS */
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	case DB_UNSUPPORTED:
		return(HA_ERR_UNSUPPORTED);
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	}
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}

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/*************************************************************//**
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Prints info of a THD object (== user session thread) to the given file. */
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extern "C" UNIV_INTERN
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void
innobase_mysql_print_thd(
/*=====================*/
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	FILE*	f,		/*!< in: output stream */
	void*	thd,		/*!< in: pointer to a MySQL THD object */
	uint	max_query_len)	/*!< in: max query length to print, or 0 to
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				   use the default max length */
{
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	char	buffer[1024];
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	fputs(thd_security_context((THD*) thd, buffer, sizeof buffer,
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				   max_query_len), f);
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	putc('\n', f);
}

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/******************************************************************//**
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Get the variable length bounds of the given character set. */
extern "C" UNIV_INTERN
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void
innobase_get_cset_width(
/*====================*/
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	ulint	cset,		/*!< in: MySQL charset-collation code */
	ulint*	mbminlen,	/*!< out: minimum length of a char (in bytes) */
	ulint*	mbmaxlen)	/*!< out: maximum length of a char (in bytes) */
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{
	CHARSET_INFO*	cs;
	ut_ad(cset < 256);
	ut_ad(mbminlen);
	ut_ad(mbmaxlen);

	cs = all_charsets[cset];
	if (cs) {
		*mbminlen = cs->mbminlen;
		*mbmaxlen = cs->mbmaxlen;
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		ut_ad(*mbminlen < DATA_MBMAX);
		ut_ad(*mbmaxlen < DATA_MBMAX);
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	} else {
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		THD*	thd = current_thd;

		if (thd && thd_sql_command(thd) == SQLCOM_DROP_TABLE) {

			/* Fix bug#46256: allow tables to be dropped if the
			collation is not found, but issue a warning. */
			if ((global_system_variables.log_warnings)
			    && (cset != 0)){

				sql_print_warning(
					"Unknown collation #%lu.", cset);
			}
		} else {

			ut_a(cset == 0);
		}

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		*mbminlen = *mbmaxlen = 0;
	}
}

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/******************************************************************//**
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Converts an identifier to a table name. */
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extern "C" UNIV_INTERN
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void
innobase_convert_from_table_id(
/*===========================*/
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	struct charset_info_st*	cs,	/*!< in: the 'from' character set */
	char*			to,	/*!< out: converted identifier */
	const char*		from,	/*!< in: identifier to convert */
	ulint			len)	/*!< in: length of 'to', in bytes */
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{
	uint	errors;

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	strconvert(cs, from, &my_charset_filename, to, (uint) len, &errors);
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}

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/******************************************************************//**
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Converts an identifier to UTF-8. */
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extern "C" UNIV_INTERN
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void
innobase_convert_from_id(
/*=====================*/
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	struct charset_info_st*	cs,	/*!< in: the 'from' character set */
	char*			to,	/*!< out: converted identifier */
	const char*		from,	/*!< in: identifier to convert */
	ulint			len)	/*!< in: length of 'to', in bytes */
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{
	uint	errors;

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	strconvert(cs, from, system_charset_info, to, (uint) len, &errors);
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}

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/******************************************************************//**
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Compares NUL-terminated UTF-8 strings case insensitively.
@return	0 if a=b, <0 if a<b, >1 if a>b */
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extern "C" UNIV_INTERN
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int
innobase_strcasecmp(
/*================*/
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	const char*	a,	/*!< in: first string to compare */
	const char*	b)	/*!< in: second string to compare */
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{
	return(my_strcasecmp(system_charset_info, a, b));
}

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/******************************************************************//**
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Makes all characters in a NUL-terminated UTF-8 string lower case. */
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extern "C" UNIV_INTERN
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void
innobase_casedn_str(
/*================*/
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	char*	a)	/*!< in/out: string to put in lower case */
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{
	my_casedn_str(system_charset_info, a);
}

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/**********************************************************************//**
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Determines the connection character set.
@return	connection character set */
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extern "C" UNIV_INTERN
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struct charset_info_st*
innobase_get_charset(
/*=================*/
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	void*	mysql_thd)	/*!< in: MySQL thread handle */
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{
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	return(thd_charset((THD*) mysql_thd));
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}

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/**********************************************************************//**
Determines the current SQL statement.
@return	SQL statement string */
extern "C" UNIV_INTERN
const char*
innobase_get_stmt(
/*==============*/
	void*	mysql_thd,	/*!< in: MySQL thread handle */
	size_t*	length)		/*!< out: length of the SQL statement */
{
	LEX_STRING* stmt;

	stmt = thd_query_string((THD*) mysql_thd);
	*length = stmt->length;
	return(stmt->str);
}

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#if defined (__WIN__) && defined (MYSQL_DYNAMIC_PLUGIN)
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extern MYSQL_PLUGIN_IMPORT MY_TMPDIR mysql_tmpdir_list;
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/*******************************************************************//**
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Map an OS error to an errno value. The OS error number is stored in
_doserrno and the mapped value is stored in errno) */
extern "C"
void __cdecl
_dosmaperr(
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	unsigned long);	/*!< in: OS error value */
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/*********************************************************************//**
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Creates a temporary file.
@return	temporary file descriptor, or < 0 on error */
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extern "C" UNIV_INTERN
int
innobase_mysql_tmpfile(void)
/*========================*/
{
	int	fd;				/* handle of opened file */
	HANDLE	osfh;				/* OS handle of opened file */
	char*	tmpdir;				/* point to the directory
						where to create file */
	TCHAR	path_buf[MAX_PATH - 14];	/* buffer for tmp file path.
						The length cannot be longer
						than MAX_PATH - 14, or
						GetTempFileName will fail. */
	char	filename[MAX_PATH];		/* name of the tmpfile */
	DWORD	fileaccess = GENERIC_READ	/* OS file access */
			     | GENERIC_WRITE
			     | DELETE;
	DWORD	fileshare = FILE_SHARE_READ	/* OS file sharing mode */
			    | FILE_SHARE_WRITE
			    | FILE_SHARE_DELETE;
	DWORD	filecreate = CREATE_ALWAYS;	/* OS method of open/create */
	DWORD	fileattrib =			/* OS file attribute flags */
			     FILE_ATTRIBUTE_NORMAL
			     | FILE_FLAG_DELETE_ON_CLOSE
			     | FILE_ATTRIBUTE_TEMPORARY
			     | FILE_FLAG_SEQUENTIAL_SCAN;

	DBUG_ENTER("innobase_mysql_tmpfile");

	tmpdir = my_tmpdir(&mysql_tmpdir_list);

	/* The tmpdir parameter can not be NULL for GetTempFileName. */
	if (!tmpdir) {
		uint	ret;

		/* Use GetTempPath to determine path for temporary files. */
		ret = GetTempPath(sizeof(path_buf), path_buf);
		if (ret > sizeof(path_buf) || (ret == 0)) {

			_dosmaperr(GetLastError());	/* map error */
			DBUG_RETURN(-1);
		}

		tmpdir = path_buf;
	}

	/* Use GetTempFileName to generate a unique filename. */
	if (!GetTempFileName(tmpdir, "ib", 0, filename)) {

		_dosmaperr(GetLastError());	/* map error */
		DBUG_RETURN(-1);
	}

	DBUG_PRINT("info", ("filename: %s", filename));

	/* Open/Create the file. */
	osfh = CreateFile(filename, fileaccess, fileshare, NULL,
			  filecreate, fileattrib, NULL);
	if (osfh == INVALID_HANDLE_VALUE) {

		/* open/create file failed! */
		_dosmaperr(GetLastError());	/* map error */
		DBUG_RETURN(-1);
	}

	do {
		/* Associates a CRT file descriptor with the OS file handle. */
		fd = _open_osfhandle((intptr_t) osfh, 0);
	} while (fd == -1 && errno == EINTR);

	if (fd == -1) {
		/* Open failed, close the file handle. */

		_dosmaperr(GetLastError());	/* map error */
		CloseHandle(osfh);		/* no need to check if
						CloseHandle fails */
	}

	DBUG_RETURN(fd);
}
#else
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/*********************************************************************//**
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Creates a temporary file.
@return	temporary file descriptor, or < 0 on error */
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extern "C" UNIV_INTERN
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int
innobase_mysql_tmpfile(void)
/*========================*/
{
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	int	fd2 = -1;
	File	fd = mysql_tmpfile("ib");
	if (fd >= 0) {
		/* Copy the file descriptor, so that the additional resources
		allocated by create_temp_file() can be freed by invoking
		my_close().

		Because the file descriptor returned by this function
		will be passed to fdopen(), it will be closed by invoking
		fclose(), which in turn will invoke close() instead of
		my_close(). */
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#ifdef _WIN32
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		/* Note that on Windows, the integer returned by mysql_tmpfile
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		has no relation to C runtime file descriptor. Here, we need
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		to call my_get_osfhandle to get the HANDLE and then convert it 
		to C runtime filedescriptor. */
		{
			HANDLE hFile = my_get_osfhandle(fd);
			HANDLE hDup;
			BOOL bOK = 
				DuplicateHandle(GetCurrentProcess(), hFile, GetCurrentProcess(),
								&hDup, 0, FALSE, DUPLICATE_SAME_ACCESS);
			if(bOK) {
				fd2 = _open_osfhandle((intptr_t)hDup,0);
			}
			else {
				my_osmaperr(GetLastError());
				fd2 = -1;
			}	
		}
#else
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		fd2 = dup(fd);
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#endif
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		if (fd2 < 0) {
			DBUG_PRINT("error",("Got error %d on dup",fd2));
			my_errno=errno;
			my_error(EE_OUT_OF_FILERESOURCES,
				 MYF(ME_BELL+ME_WAITTANG),
				 "ib*", my_errno);
		}
		my_close(fd, MYF(MY_WME));
	}
	return(fd2);
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}
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#endif /* defined (__WIN__) && defined (MYSQL_DYNAMIC_PLUGIN) */
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/*********************************************************************//**
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Wrapper around MySQL's copy_and_convert function.
@return	number of bytes copied to 'to' */
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extern "C" UNIV_INTERN
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ulint
innobase_convert_string(
/*====================*/
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	void*		to,		/*!< out: converted string */
	ulint		to_length,	/*!< in: number of bytes reserved
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					for the converted string */
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	CHARSET_INFO*	to_cs,		/*!< in: character set to convert to */
	const void*	from,		/*!< in: string to convert */
	ulint		from_length,	/*!< in: number of bytes to convert */
	CHARSET_INFO*	from_cs,	/*!< in: character set to convert from */
	uint*		errors)		/*!< out: number of errors encountered
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					during the conversion */
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{
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  return(copy_and_convert((char*)to, (uint32) to_length, to_cs,
                          (const char*)from, (uint32) from_length, from_cs,
                          errors));
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}

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/*******************************************************************//**
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Formats the raw data in "data" (in InnoDB on-disk format) that is of
type DATA_(CHAR|VARCHAR|MYSQL|VARMYSQL) using "charset_coll" and writes
the result to "buf". The result is converted to "system_charset_info".
Not more than "buf_size" bytes are written to "buf".
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The result is always NUL-terminated (provided buf_size > 0) and the
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number of bytes that were written to "buf" is returned (including the
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terminating NUL).
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@return	number of bytes that were written */
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extern "C" UNIV_INTERN
ulint
innobase_raw_format(
/*================*/
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	const char*	data,		/*!< in: raw data */
	ulint		data_len,	/*!< in: raw data length
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					in bytes */
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	ulint		charset_coll,	/*!< in: charset collation */
	char*		buf,		/*!< out: output buffer */
	ulint		buf_size)	/*!< in: output buffer size
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					in bytes */
{
	/* XXX we use a hard limit instead of allocating
	but_size bytes from the heap */
	CHARSET_INFO*	data_cs;
	char		buf_tmp[8192];
	ulint		buf_tmp_used;
	uint		num_errors;

	data_cs = all_charsets[charset_coll];

	buf_tmp_used = innobase_convert_string(buf_tmp, sizeof(buf_tmp),
					       system_charset_info,
					       data, data_len, data_cs,
					       &num_errors);

	return(ut_str_sql_format(buf_tmp, buf_tmp_used, buf, buf_size));
}

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/*********************************************************************//**
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Compute the next autoinc value.

For MySQL replication the autoincrement values can be partitioned among
the nodes. The offset is the start or origin of the autoincrement value
for a particular node. For n nodes the increment will be n and the offset
will be in the interval [1, n]. The formula tries to allocate the next
value for a particular node.

Note: This function is also called with increment set to the number of
values we want to reserve for multi-value inserts e.g.,

	INSERT INTO T VALUES(), (), ();

innobase_next_autoinc() will be called with increment set to
n * 3 where autoinc_lock_mode != TRADITIONAL because we want
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to reserve 3 values for the multi-value INSERT above.
@return	the next value */
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static
ulonglong
innobase_next_autoinc(
/*==================*/
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	ulonglong	current,	/*!< in: Current value */
	ulonglong	increment,	/*!< in: increment current by */
	ulonglong	offset,		/*!< in: AUTOINC offset */
	ulonglong	max_value)	/*!< in: max value for type */
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{
	ulonglong	next_value;

	/* Should never be 0. */
	ut_a(increment > 0);

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	/* According to MySQL documentation, if the offset is greater than
	the increment then the offset is ignored. */
	if (offset > increment) {
		offset = 0;
	}

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	if (max_value <= current) {
		next_value = max_value;
	} else if (offset <= 1) {
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		/* Offset 0 and 1 are the same, because there must be at
		least one node in the system. */
		if (max_value - current <= increment) {
			next_value = max_value;
		} else {
			next_value = current + increment;
		}
	} else if (max_value > current) {
		if (current > offset) {
			next_value = ((current - offset) / increment) + 1;
		} else {
			next_value = ((offset - current) / increment) + 1;
		}

		ut_a(increment > 0);
		ut_a(next_value > 0);

		/* Check for multiplication overflow. */
		if (increment > (max_value / next_value)) {

			next_value = max_value;
		} else {
			next_value *= increment;

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			ut_a(max_value >= next_value);

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			/* Check for overflow. */
			if (max_value - next_value <= offset) {
				next_value = max_value;
			} else {
				next_value += offset;
			}
		}
	} else {
		next_value = max_value;
	}

	ut_a(next_value <= max_value);

	return(next_value);
}

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/*********************************************************************//**
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Initializes some fields in an InnoDB transaction object. */
static
void
innobase_trx_init(
/*==============*/
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	THD*	thd,	/*!< in: user thread handle */
	trx_t*	trx)	/*!< in/out: InnoDB transaction handle */
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{
	DBUG_ENTER("innobase_trx_init");
	DBUG_ASSERT(EQ_CURRENT_THD(thd));
	DBUG_ASSERT(thd == trx->mysql_thd);

	trx->check_foreigns = !thd_test_options(
		thd, OPTION_NO_FOREIGN_KEY_CHECKS);

	trx->check_unique_secondary = !thd_test_options(
		thd, OPTION_RELAXED_UNIQUE_CHECKS);

	DBUG_VOID_RETURN;
}

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/*********************************************************************//**
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Allocates an InnoDB transaction for a MySQL handler object.
@return	InnoDB transaction handle */
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extern "C" UNIV_INTERN
trx_t*
innobase_trx_allocate(
/*==================*/
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	THD*	thd)	/*!< in: user thread handle */
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{
	trx_t*	trx;

	DBUG_ENTER("innobase_trx_allocate");
	DBUG_ASSERT(thd != NULL);
	DBUG_ASSERT(EQ_CURRENT_THD(thd));

	trx = trx_allocate_for_mysql();

	trx->mysql_thd = thd;

	innobase_trx_init(thd, trx);

	DBUG_RETURN(trx);
}

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/*********************************************************************//**
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Gets the InnoDB transaction handle for a MySQL handler object, creates
an InnoDB transaction struct if the corresponding MySQL thread struct still
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lacks one.
@return	InnoDB transaction handle */
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static inline
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trx_t*
check_trx_exists(
/*=============*/
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	THD*	thd)	/*!< in: user thread handle */
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{
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	trx_t*&	trx = thd_to_trx(thd);
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	ut_ad(EQ_CURRENT_THD(thd));
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	if (trx == NULL) {
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		trx = innobase_trx_allocate(thd);
	} else if (UNIV_UNLIKELY(trx->magic_n != TRX_MAGIC_N)) {
		mem_analyze_corruption(trx);
		ut_error;
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	}

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	innobase_trx_init(thd, trx);
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	return(trx);
}

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/*********************************************************************//**
Note that a transaction has been registered with MySQL.
@return true if transaction is registered with MySQL 2PC coordinator */
static inline
bool
trx_is_registered_for_2pc(
/*=========================*/
	const trx_t*	trx)	/* in: transaction */
{
	return(trx->is_registered == 1);
}

/*********************************************************************//**
Note that a transaction owns the prepare_commit_mutex. */
static inline
void
trx_owns_prepare_commit_mutex_set(
/*==============================*/
	trx_t*	trx)	/* in: transaction */
{
	ut_a(trx_is_registered_for_2pc(trx));
	trx->owns_prepare_mutex = 1;
}

/*********************************************************************//**
Note that a transaction has been registered with MySQL 2PC coordinator. */
static inline
void
trx_register_for_2pc(
/*==================*/
	trx_t*	trx)	/* in: transaction */
{
	trx->is_registered = 1;
	ut_ad(trx->owns_prepare_mutex == 0);
}

/*********************************************************************//**
Note that a transaction has been deregistered. */
static inline
void
trx_deregister_from_2pc(
/*====================*/
	trx_t*	trx)	/* in: transaction */
{
	trx->is_registered = 0;
	trx->owns_prepare_mutex = 0;
}

/*********************************************************************//**
Check whether atransaction owns the prepare_commit_mutex.
@return true if transaction owns the prepare commit mutex */
static inline
bool
trx_has_prepare_commit_mutex(
/*=========================*/
	const trx_t*	trx)	/* in: transaction */
{
	return(trx->owns_prepare_mutex == 1);
}

/*********************************************************************//**
Check if transaction is started.
@reutrn true if transaction is in state started */
static
bool
trx_is_started(
/*===========*/
	trx_t*	trx)	/* in: transaction */
{
	return(trx->conc_state != TRX_NOT_STARTED);
}
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/*********************************************************************//**
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Construct ha_innobase handler. */
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UNIV_INTERN
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ha_innobase::ha_innobase(handlerton *hton, TABLE_SHARE *table_arg)
  :handler(hton, table_arg),
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  int_table_flags(HA_REC_NOT_IN_SEQ |
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		  HA_NULL_IN_KEY |
		  HA_CAN_INDEX_BLOBS |
		  HA_CAN_SQL_HANDLER |
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		  HA_PRIMARY_KEY_REQUIRED_FOR_POSITION |
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		  HA_PRIMARY_KEY_IN_READ_INDEX |
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		  HA_BINLOG_ROW_CAPABLE |
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		  HA_CAN_GEOMETRY | HA_PARTIAL_COLUMN_READ |
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		  HA_TABLE_SCAN_ON_INDEX),
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  start_of_scan(0),
  num_write_row(0)
{}

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/*********************************************************************//**
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Destruct ha_innobase handler. */
UNIV_INTERN
ha_innobase::~ha_innobase()
{
}

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/*********************************************************************//**
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Updates the user_thd field in a handle and also allocates a new InnoDB
transaction handle if needed, and updates the transaction fields in the
prebuilt struct. */
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UNIV_INTERN inline
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void
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ha_innobase::update_thd(
/*====================*/
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	THD*	thd)	/*!< in: thd to use the handle */
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{
	trx_t*		trx;

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	trx = check_trx_exists(thd);
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	if (prebuilt->trx != trx) {

		row_update_prebuilt_trx(prebuilt, trx);
	}

	user_thd = thd;
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}
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/*********************************************************************//**
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Updates the user_thd field in a handle and also allocates a new InnoDB
transaction handle if needed, and updates the transaction fields in the
prebuilt struct. */
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UNIV_INTERN
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void
ha_innobase::update_thd()
/*=====================*/
{
	THD*	thd = ha_thd();
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	ut_ad(EQ_CURRENT_THD(thd));
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	update_thd(thd);
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}

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/*********************************************************************//**
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Registers an InnoDB transaction with the MySQL 2PC coordinator, so that
the MySQL XA code knows to call the InnoDB prepare and commit, or rollback
for the transaction. This MUST be called for every transaction for which
the user may call commit or rollback. Calling this several times to register
the same transaction is allowed, too. This function also registers the
current SQL statement. */
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static inline
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void
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innobase_register_trx(
/*==================*/
	handlerton*	hton,	/* in: Innobase handlerton */
	THD*		thd,	/* in: MySQL thd (connection) object */
	trx_t*		trx)	/* in: transaction to register */
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{
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	trans_register_ha(thd, FALSE, hton);
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	if (!trx_is_registered_for_2pc(trx)
	    && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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		trans_register_ha(thd, TRUE, hton);
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	}
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	trx_register_for_2pc(trx);
}
  
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/*   BACKGROUND INFO: HOW THE MYSQL QUERY CACHE WORKS WITH INNODB
     ------------------------------------------------------------

1) The use of the query cache for TBL is disabled when there is an
uncommitted change to TBL.

2) When a change to TBL commits, InnoDB stores the current value of
its global trx id counter, let us denote it by INV_TRX_ID, to the table object
in the InnoDB data dictionary, and does only allow such transactions whose
id <= INV_TRX_ID to use the query cache.

3) When InnoDB does an INSERT/DELETE/UPDATE to a table TBL, or an implicit
modification because an ON DELETE CASCADE, we invalidate the MySQL query cache
of TBL immediately.

How this is implemented inside InnoDB:

1) Since every modification always sets an IX type table lock on the InnoDB
table, it is easy to check if there can be uncommitted modifications for a
table: just check if there are locks in the lock list of the table.

2) When a transaction inside InnoDB commits, it reads the global trx id
counter and stores the value INV_TRX_ID to the tables on which it had a lock.

3) If there is an implicit table change from ON DELETE CASCADE or SET NULL,
InnoDB calls an invalidate method for the MySQL query cache for that table.

How this is implemented inside sql_cache.cc:

1) The query cache for an InnoDB table TBL is invalidated immediately at an
INSERT/UPDATE/DELETE, just like in the case of MyISAM. No need to delay
invalidation to the transaction commit.

2) To store or retrieve a value from the query cache of an InnoDB table TBL,
any query must first ask InnoDB's permission. We must pass the thd as a
parameter because InnoDB will look at the trx id, if any, associated with
that thd.

3) Use of the query cache for InnoDB tables is now allowed also when
AUTOCOMMIT==0 or we are inside BEGIN ... COMMIT. Thus transactions no longer
put restrictions on the use of the query cache.
*/

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/******************************************************************//**
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The MySQL query cache uses this to check from InnoDB if the query cache at
the moment is allowed to operate on an InnoDB table. The SQL query must
be a non-locking SELECT.

The query cache is allowed to operate on certain query only if this function
returns TRUE for all tables in the query.

If thd is not in the autocommit state, this function also starts a new
transaction for thd if there is no active trx yet, and assigns a consistent
read view to it if there is no read view yet.

Why a deadlock of threads is not possible: the query cache calls this function
at the start of a SELECT processing. Then the calling thread cannot be
holding any InnoDB semaphores. The calling thread is holding the
query cache mutex, and this function will reserver the InnoDB kernel mutex.
Thus, the 'rank' in sync0sync.h of the MySQL query cache mutex is above
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the InnoDB kernel mutex.
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@return TRUE if permitted, FALSE if not; note that the value FALSE
does not mean we should invalidate the query cache: invalidation is
called explicitly */
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static
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my_bool
innobase_query_caching_of_table_permitted(
/*======================================*/
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	THD*	thd,		/*!< in: thd of the user who is trying to
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				store a result to the query cache or
				retrieve it */
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	char*	full_name,	/*!< in: concatenation of database name,
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				the null character NUL, and the table
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				name */
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	uint	full_name_len,	/*!< in: length of the full name, i.e.
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				len(dbname) + len(tablename) + 1 */
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	ulonglong *unused)	/*!< unused for this engine */
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{
	ibool	is_autocommit;
	trx_t*	trx;
	char	norm_name[1000];

	ut_a(full_name_len < 999);

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	trx = check_trx_exists(thd);

	if (trx->isolation_level == TRX_ISO_SERIALIZABLE) {
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		/* In the SERIALIZABLE mode we add LOCK IN SHARE MODE to every
		plain SELECT if AUTOCOMMIT is not on. */
1802

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		return((my_bool)FALSE);
	}

	if (trx->has_search_latch) {
		sql_print_error("The calling thread is holding the adaptive "
				"search, latch though calling "
				"innobase_query_caching_of_table_permitted.");
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		mutex_enter(&kernel_mutex);
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		trx_print(stderr, trx, 1024);
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		mutex_exit(&kernel_mutex);
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	}

	innobase_release_stat_resources(trx);

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	if (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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		is_autocommit = TRUE;
	} else {
		is_autocommit = FALSE;

	}

	if (is_autocommit && trx->n_mysql_tables_in_use == 0) {
		/* We are going to retrieve the query result from the query
		cache. This cannot be a store operation to the query cache
		because then MySQL would have locks on tables already.

		TODO: if the user has used LOCK TABLES to lock the table,
		then we open a transaction in the call of row_.. below.
		That trx can stay open until UNLOCK TABLES. The same problem
		exists even if we do not use the query cache. MySQL should be
		modified so that it ALWAYS calls some cleanup function when
		the processing of a query ends!

		We can imagine we instantaneously serialize this consistent
		read trx to the current trx id counter. If trx2 would have
		changed the tables of a query result stored in the cache, and
		trx2 would have already committed, making the result obsolete,
		then trx2 would have already invalidated the cache. Thus we
		can trust the result in the cache is ok for this query. */

		return((my_bool)TRUE);
	}
1847

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	/* Normalize the table name to InnoDB format */

	memcpy(norm_name, full_name, full_name_len);

	norm_name[strlen(norm_name)] = '/'; /* InnoDB uses '/' as the
					    separator between db and table */
	norm_name[full_name_len] = '\0';
#ifdef __WIN__
	innobase_casedn_str(norm_name);
#endif

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	innobase_register_trx(innodb_hton_ptr, thd, trx);
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	if (row_search_check_if_query_cache_permitted(trx, norm_name)) {

		/* printf("Query cache for %s permitted\n", norm_name); */

		return((my_bool)TRUE);
	}

	/* printf("Query cache for %s NOT permitted\n", norm_name); */

	return((my_bool)FALSE);
}

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/*****************************************************************//**
1874
Invalidates the MySQL query cache for the table. */
1875
extern "C" UNIV_INTERN
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void
innobase_invalidate_query_cache(
/*============================*/
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	trx_t*		trx,		/*!< in: transaction which
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					modifies the table */
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	const char*	full_name,	/*!< in: concatenation of
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					database name, null char NUL,
					table name, null char NUL;
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					NOTE that in Windows this is
					always in LOWER CASE! */
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	ulint		full_name_len)	/*!< in: full name length where
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					also the null chars count */
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{
	/* Note that the sync0sync.h rank of the query cache mutex is just
	above the InnoDB kernel mutex. The caller of this function must not
	have latches of a lower rank. */

	/* Argument TRUE below means we are using transactions */
#ifdef HAVE_QUERY_CACHE
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	mysql_query_cache_invalidate4((THD*) trx->mysql_thd,
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				      full_name,
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				      (uint32) full_name_len,
				      TRUE);
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#endif
}

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/*****************************************************************//**
1903
Convert an SQL identifier to the MySQL system_charset_info (UTF-8)
1904 1905
and quote it if needed.
@return	pointer to the end of buf */
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static
char*
innobase_convert_identifier(
/*========================*/
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	char*		buf,	/*!< out: buffer for converted identifier */
	ulint		buflen,	/*!< in: length of buf, in bytes */
	const char*	id,	/*!< in: identifier to convert */
	ulint		idlen,	/*!< in: length of id, in bytes */
	void*		thd,	/*!< in: MySQL connection thread, or NULL */
	ibool		file_id)/*!< in: TRUE=id is a table or database name;
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				FALSE=id is an UTF-8 string */
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{
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	char nz[NAME_LEN + 1];
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	char nz2[NAME_LEN + 1 + EXPLAIN_FILENAME_MAX_EXTRA_LENGTH];
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	const char*	s	= id;
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	int		q;

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	if (file_id) {
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		/* Decode the table name.  The MySQL function expects
		a NUL-terminated string.  The input and output strings
		buffers must not be shared. */
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		if (UNIV_UNLIKELY(idlen > (sizeof nz) - 1)) {
			idlen = (sizeof nz) - 1;
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		}

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		memcpy(nz, id, idlen);
		nz[idlen] = 0;
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		s = nz2;
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		idlen = explain_filename((THD*) thd, nz, nz2, sizeof nz2,
					 EXPLAIN_PARTITIONS_AS_COMMENT);
		goto no_quote;
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	}

	/* See if the identifier needs to be quoted. */
	if (UNIV_UNLIKELY(!thd)) {
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		q = '"';
	} else {
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		q = get_quote_char_for_identifier((THD*) thd, s, (int) idlen);
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	}
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	if (q == EOF) {
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no_quote:
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		if (UNIV_UNLIKELY(idlen > buflen)) {
			idlen = buflen;
		}
		memcpy(buf, s, idlen);
		return(buf + idlen);
	}

	/* Quote the identifier. */
	if (buflen < 2) {
		return(buf);
	}

	*buf++ = q;
	buflen--;

	for (; idlen; idlen--) {
		int	c = *s++;
		if (UNIV_UNLIKELY(c == q)) {
			if (UNIV_UNLIKELY(buflen < 3)) {
				break;
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			}
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			*buf++ = c;
			*buf++ = c;
			buflen -= 2;
		} else {
			if (UNIV_UNLIKELY(buflen < 2)) {
				break;
			}

			*buf++ = c;
			buflen--;
		}
	}

	*buf++ = q;
	return(buf);
}

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/*****************************************************************//**
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Convert a table or index name to the MySQL system_charset_info (UTF-8)
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and quote it if needed.
@return	pointer to the end of buf */
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extern "C" UNIV_INTERN
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char*
innobase_convert_name(
/*==================*/
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	char*		buf,	/*!< out: buffer for converted identifier */
	ulint		buflen,	/*!< in: length of buf, in bytes */
	const char*	id,	/*!< in: identifier to convert */
	ulint		idlen,	/*!< in: length of id, in bytes */
	void*		thd,	/*!< in: MySQL connection thread, or NULL */
	ibool		table_id)/*!< in: TRUE=id is a table or database name;
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				FALSE=id is an index name */
{
	char*		s	= buf;
	const char*	bufend	= buf + buflen;

	if (table_id) {
		const char*	slash = (const char*) memchr(id, '/', idlen);
		if (!slash) {

			goto no_db_name;
2014
		}
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		/* Print the database name and table name separately. */
		s = innobase_convert_identifier(s, bufend - s, id, slash - id,
						thd, TRUE);
		if (UNIV_LIKELY(s < bufend)) {
			*s++ = '.';
			s = innobase_convert_identifier(s, bufend - s,
							slash + 1, idlen
							- (slash - id) - 1,
							thd, TRUE);
		}
	} else if (UNIV_UNLIKELY(*id == TEMP_INDEX_PREFIX)) {
		/* Temporary index name (smart ALTER TABLE) */
		const char temp_index_suffix[]= "--temporary--";

		s = innobase_convert_identifier(buf, buflen, id + 1, idlen - 1,
						thd, FALSE);
		if (s - buf + (sizeof temp_index_suffix - 1) < buflen) {
			memcpy(s, temp_index_suffix,
			       sizeof temp_index_suffix - 1);
			s += sizeof temp_index_suffix - 1;
		}
	} else {
no_db_name:
		s = innobase_convert_identifier(buf, buflen, id, idlen,
						thd, table_id);
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	}

2043 2044
	return(s);

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}

2047
/**********************************************************************//**
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Determines if the currently running transaction has been interrupted.
@return	TRUE if interrupted */
2050
extern "C" UNIV_INTERN
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ibool
trx_is_interrupted(
/*===============*/
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	trx_t*	trx)	/*!< in: transaction */
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{
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	return(trx && trx->mysql_thd && thd_killed((THD*) trx->mysql_thd));
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}

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/**********************************************************************//**
Determines if the currently running transaction is in strict mode.
@return	TRUE if strict */
extern "C" UNIV_INTERN
ibool
trx_is_strict(
/*==========*/
	trx_t*	trx)	/*!< in: transaction */
{
	return(trx && trx->mysql_thd
	       && THDVAR((THD*) trx->mysql_thd, strict_mode));
}

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/**************************************************************//**
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Resets some fields of a prebuilt struct. The template is used in fast
retrieval of just those column values MySQL needs in its processing. */
static
void
reset_template(
/*===========*/
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	row_prebuilt_t*	prebuilt)	/*!< in/out: prebuilt struct */
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{
	prebuilt->keep_other_fields_on_keyread = 0;
	prebuilt->read_just_key = 0;
}

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/*****************************************************************//**
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Call this when you have opened a new table handle in HANDLER, before you
call index_read_idx() etc. Actually, we can let the cursor stay open even
over a transaction commit! Then you should call this before every operation,
fetch next etc. This function inits the necessary things even after a
transaction commit. */
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UNIV_INTERN
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void
ha_innobase::init_table_handle_for_HANDLER(void)
/*============================================*/
{
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	/* If current thd does not yet have a trx struct, create one.
	If the current handle does not yet have a prebuilt struct, create
	one. Update the trx pointers in the prebuilt struct. Normally
	this operation is done in external_lock. */
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	update_thd(ha_thd());
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	/* Initialize the prebuilt struct much like it would be inited in
	external_lock */
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	innobase_release_stat_resources(prebuilt->trx);

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	/* If the transaction is not started yet, start it */
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	trx_start_if_not_started(prebuilt->trx);
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	/* Assign a read view if the transaction does not have it yet */
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	trx_assign_read_view(prebuilt->trx);
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	innobase_register_trx(ht, user_thd, prebuilt->trx);
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	/* We did the necessary inits in this function, no need to repeat them
	in row_search_for_mysql */
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	prebuilt->sql_stat_start = FALSE;
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	/* We let HANDLER always to do the reads as consistent reads, even
	if the trx isolation level would have been specified as SERIALIZABLE */
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	prebuilt->select_lock_type = LOCK_NONE;
	prebuilt->stored_select_lock_type = LOCK_NONE;
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	/* Always fetch all columns in the index record */
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	prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
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	/* We want always to fetch all columns in the whole row? Or do
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	we???? */

	prebuilt->used_in_HANDLER = TRUE;
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	reset_template(prebuilt);
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}

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/*********************************************************************//**
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Opens an InnoDB database.
@return	0 on success, error code on failure */
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static
2144
int
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innobase_init(
/*==========*/
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	void	*p)	/*!< in: InnoDB handlerton */
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{
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	static char	current_dir[3];		/*!< Set if using current lib */
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	int		err;
	bool		ret;
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	char		*default_path;
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	uint		format_id;
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	DBUG_ENTER("innobase_init");
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        handlerton *innobase_hton= (handlerton *)p;
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        innodb_hton_ptr = innobase_hton;
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        innobase_hton->state = SHOW_OPTION_YES;
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        innobase_hton->db_type= DB_TYPE_INNODB;
        innobase_hton->savepoint_offset=sizeof(trx_named_savept_t);
        innobase_hton->close_connection=innobase_close_connection;
        innobase_hton->savepoint_set=innobase_savepoint;
        innobase_hton->savepoint_rollback=innobase_rollback_to_savepoint;
        innobase_hton->savepoint_release=innobase_release_savepoint;
        innobase_hton->commit=innobase_commit;
        innobase_hton->rollback=innobase_rollback;
        innobase_hton->prepare=innobase_xa_prepare;
        innobase_hton->recover=innobase_xa_recover;
        innobase_hton->commit_by_xid=innobase_commit_by_xid;
        innobase_hton->rollback_by_xid=innobase_rollback_by_xid;
        innobase_hton->create_cursor_read_view=innobase_create_cursor_view;
        innobase_hton->set_cursor_read_view=innobase_set_cursor_view;
        innobase_hton->close_cursor_read_view=innobase_close_cursor_view;
        innobase_hton->create=innobase_create_handler;
        innobase_hton->drop_database=innobase_drop_database;
        innobase_hton->panic=innobase_end;
        innobase_hton->start_consistent_snapshot=innobase_start_trx_and_assign_read_view;
        innobase_hton->flush_logs=innobase_flush_logs;
        innobase_hton->show_status=innobase_show_status;
        innobase_hton->flags=HTON_NO_FLAGS;
        innobase_hton->release_temporary_latches=innobase_release_temporary_latches;
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	innobase_hton->alter_table_flags = innobase_alter_table_flags;
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	ut_a(DATA_MYSQL_TRUE_VARCHAR == (ulint)MYSQL_TYPE_VARCHAR);

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#ifndef DBUG_OFF
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	static const char	test_filename[] = "-@";
	char			test_tablename[sizeof test_filename
				+ sizeof srv_mysql50_table_name_prefix];
	if ((sizeof test_tablename) - 1
			!= filename_to_tablename(test_filename, test_tablename,
2193
			sizeof test_tablename, true)
2194 2195 2196 2197 2198 2199 2200 2201 2202
			|| strncmp(test_tablename,
			srv_mysql50_table_name_prefix,
			sizeof srv_mysql50_table_name_prefix)
			|| strcmp(test_tablename
			+ sizeof srv_mysql50_table_name_prefix,
			test_filename)) {
		sql_print_error("tablename encoding has been changed");
		goto error;
	}
2203
#endif /* DBUG_OFF */
2204

2205 2206
	/* Check that values don't overflow on 32-bit systems. */
	if (sizeof(ulint) == 4) {
2207
		if (innobase_buffer_pool_size > UINT_MAX32) {
2208 2209 2210 2211
			sql_print_error(
				"innobase_buffer_pool_size can't be over 4GB"
				" on 32-bit systems");

2212
			goto error;
2213 2214 2215 2216 2217 2218 2219
		}

		if (innobase_log_file_size > UINT_MAX32) {
			sql_print_error(
				"innobase_log_file_size can't be over 4GB"
				" on 32-bit systems");

2220
			goto error;
2221 2222 2223
		}
	}

2224
	os_innodb_umask = (ulint)my_umask;
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	/* First calculate the default path for innodb_data_home_dir etc.,
	in case the user has not given any value.

	Note that when using the embedded server, the datadirectory is not
	necessarily the current directory of this program. */

	if (mysqld_embedded) {
		default_path = mysql_real_data_home;
		fil_path_to_mysql_datadir = mysql_real_data_home;
	} else {
2236 2237 2238 2239 2240
		/* It's better to use current lib, to keep paths short */
		current_dir[0] = FN_CURLIB;
		current_dir[1] = FN_LIBCHAR;
		current_dir[2] = 0;
		default_path = current_dir;
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	}

	ut_a(default_path);

	/* Set InnoDB initialization parameters according to the values
	read from MySQL .cnf file */

	/*--------------- Data files -------------------------*/

	/* The default dir for data files is the datadir of MySQL */

	srv_data_home = (innobase_data_home_dir ? innobase_data_home_dir :
			 default_path);

	/* Set default InnoDB data file size to 10 MB and let it be
2256
	auto-extending. Thus users can use InnoDB in >= 4.0 without having
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2257 2258 2259
	to specify any startup options. */

	if (!innobase_data_file_path) {
2260
		innobase_data_file_path = (char*) "ibdata1:10M:autoextend";
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	}

	/* Since InnoDB edits the argument in the next call, we make another
	copy of it: */

	internal_innobase_data_file_path = my_strdup(innobase_data_file_path,
						   MYF(MY_FAE));

	ret = (bool) srv_parse_data_file_paths_and_sizes(
2270
		internal_innobase_data_file_path);
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2271
	if (ret == FALSE) {
2272
		sql_print_error(
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2273
			"InnoDB: syntax error in innodb_data_file_path");
2274 2275
mem_free_and_error:
		srv_free_paths_and_sizes();
2276
		my_free(internal_innobase_data_file_path);
2277
		goto error;
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2278 2279 2280 2281 2282
	}

	/* -------------- Log files ---------------------------*/

	/* The default dir for log files is the datadir of MySQL */
2283

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2284
	if (!innobase_log_group_home_dir) {
2285
		innobase_log_group_home_dir = default_path;
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	}

2288
#ifdef UNIV_LOG_ARCHIVE
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	/* Since innodb_log_arch_dir has no relevance under MySQL,
	starting from 4.0.6 we always set it the same as
	innodb_log_group_home_dir: */

	innobase_log_arch_dir = innobase_log_group_home_dir;

	srv_arch_dir = innobase_log_arch_dir;
#endif /* UNIG_LOG_ARCHIVE */

	ret = (bool)
2299
		srv_parse_log_group_home_dirs(innobase_log_group_home_dir);
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2300 2301 2302 2303 2304

	if (ret == FALSE || innobase_mirrored_log_groups != 1) {
	  sql_print_error("syntax error in innodb_log_group_home_dir, or a "
			  "wrong number of mirrored log groups");

2305
		goto mem_free_and_error;
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	}

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	/* Validate the file format by animal name */
	if (innobase_file_format_name != NULL) {

		format_id = innobase_file_format_name_lookup(
			innobase_file_format_name);

		if (format_id > DICT_TF_FORMAT_MAX) {

			sql_print_error("InnoDB: wrong innodb_file_format.");

2318
			goto mem_free_and_error;
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		}
	} else {
		/* Set it to the default file format id. Though this
		should never happen. */
		format_id = 0;
	}

	srv_file_format = format_id;

	/* Given the type of innobase_file_format_name we have little
	choice but to cast away the constness from the returned name.
	innobase_file_format_name is used in the MySQL set variable
	interface and so can't be const. */

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	innobase_file_format_name =
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		(char*) trx_sys_file_format_id_to_name(format_id);

2336 2337
	/* Check innobase_file_format_check variable */
	if (!innobase_file_format_check) {
2338

2339 2340
		/* Set the value to disable checking. */
		srv_max_file_format_at_startup = DICT_TF_FORMAT_MAX + 1;
2341

2342
	} else {
2343

2344 2345 2346
		/* Set the value to the lowest supported format. */
		srv_max_file_format_at_startup = DICT_TF_FORMAT_MIN;
	}
2347

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	/* Did the user specify a format name that we support?
	As a side effect it will update the variable
	srv_max_file_format_at_startup */
	if (innobase_file_format_validate_and_set(
			innobase_file_format_max) < 0) {

		sql_print_error("InnoDB: invalid "
				"innodb_file_format_max value: "
				"should be any value up to %s or its "
				"equivalent numeric id",
				trx_sys_file_format_id_to_name(
					DICT_TF_FORMAT_MAX));

		goto mem_free_and_error;
2362 2363
	}

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	if (innobase_change_buffering) {
		ulint	use;

		for (use = 0;
		     use < UT_ARR_SIZE(innobase_change_buffering_values);
		     use++) {
			if (!innobase_strcasecmp(
				    innobase_change_buffering,
				    innobase_change_buffering_values[use])) {
				ibuf_use = (ibuf_use_t) use;
				goto innobase_change_buffering_inited_ok;
			}
		}

		sql_print_error("InnoDB: invalid value "
2379
				"innodb_change_buffering=%s",
2380 2381 2382 2383 2384
				innobase_change_buffering);
		goto mem_free_and_error;
	}

innobase_change_buffering_inited_ok:
2385 2386 2387 2388
	ut_a((ulint) ibuf_use < UT_ARR_SIZE(innobase_change_buffering_values));
	innobase_change_buffering = (char*)
		innobase_change_buffering_values[ibuf_use];

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	/* --------------------------------------------------*/

2391
	srv_file_flush_method_str = innobase_file_flush_method;
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	srv_n_log_groups = (ulint) innobase_mirrored_log_groups;
	srv_n_log_files = (ulint) innobase_log_files_in_group;
	srv_log_file_size = (ulint) innobase_log_file_size;

#ifdef UNIV_LOG_ARCHIVE
	srv_log_archive_on = (ulint) innobase_log_archive;
#endif /* UNIV_LOG_ARCHIVE */
	srv_log_buffer_size = (ulint) innobase_log_buffer_size;

2402
	srv_buf_pool_size = (ulint) innobase_buffer_pool_size;
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2403
	srv_buf_pool_instances = (ulint) innobase_buffer_pool_instances;
2404

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	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;

	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
2408 2409
	srv_n_read_io_threads = (ulint) innobase_read_io_threads;
	srv_n_write_io_threads = (ulint) innobase_write_io_threads;
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	srv_force_recovery = (ulint) innobase_force_recovery;

	srv_use_doublewrite_buf = (ibool) innobase_use_doublewrite;
	srv_use_checksums = (ibool) innobase_use_checksums;

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#ifdef HAVE_LARGE_PAGES
        if ((os_use_large_pages = (ibool) my_use_large_pages))
		os_large_page_size = (ulint) opt_large_page_size;
#endif
2420

2421 2422
	row_rollback_on_timeout = (ibool) innobase_rollback_on_timeout;

2423
	srv_locks_unsafe_for_binlog = (ibool) innobase_locks_unsafe_for_binlog;
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	srv_max_n_open_files = (ulint) innobase_open_files;
	srv_innodb_status = (ibool) innobase_create_status_file;

	srv_print_verbose_log = mysqld_embedded ? 0 : 1;

	/* Store the default charset-collation number of this MySQL
	installation */

	data_mysql_default_charset_coll = (ulint)default_charset_info->number;

	ut_a(DATA_MYSQL_LATIN1_SWEDISH_CHARSET_COLL ==
					my_charset_latin1.number);
2437
	ut_a(DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number);
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2438 2439 2440 2441 2442 2443

	/* Store the latin1_swedish_ci character ordering table to InnoDB. For
	non-latin1_swedish_ci charsets we use the MySQL comparison functions,
	and consequently we do not need to know the ordering internally in
	InnoDB. */

2444 2445
	ut_a(0 == strcmp(my_charset_latin1.name, "latin1_swedish_ci"));
	srv_latin1_ordering = my_charset_latin1.sort_order;
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2446

2447 2448
	innobase_commit_concurrency_init_default();

2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487
#ifdef HAVE_PSI_INTERFACE
	/* Register keys with MySQL performance schema */
	if (PSI_server) {
		int	count;

                count = array_elements(all_pthread_mutexes);
                PSI_server->register_mutex("innodb",
                                           all_pthread_mutexes, count);

# ifdef UNIV_PFS_MUTEX
		count = array_elements(all_innodb_mutexes);
		PSI_server->register_mutex("innodb",
					   all_innodb_mutexes, count);
# endif /* UNIV_PFS_MUTEX */

# ifdef UNIV_PFS_RWLOCK
		count = array_elements(all_innodb_rwlocks);
		PSI_server->register_rwlock("innodb",
					    all_innodb_rwlocks, count);
# endif /* UNIV_PFS_MUTEX */

# ifdef UNIV_PFS_THREAD
		count = array_elements(all_innodb_threads);
		PSI_server->register_thread("innodb",
					    all_innodb_threads, count);
# endif /* UNIV_PFS_THREAD */

# ifdef UNIV_PFS_IO
		count = array_elements(all_innodb_files);
		PSI_server->register_file("innodb",
					  all_innodb_files, count);
# endif /* UNIV_PFS_IO */

		count = array_elements(all_innodb_conds);
		PSI_server->register_cond("innodb",
					  all_innodb_conds, count);
	}
#endif /* HAVE_PSI_INTERFACE */

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	/* Since we in this module access directly the fields of a trx
2489
	struct, and due to different headers and flags it might happen that
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	mutex_t has a different size in this module and in InnoDB
	modules, we check at run time that the size is the same in
	these compilation modules. */

	err = innobase_start_or_create_for_mysql();

	if (err != DB_SUCCESS) {
2497
		goto mem_free_and_error;
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	}

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	innobase_old_blocks_pct = buf_LRU_old_ratio_update(
		innobase_old_blocks_pct, TRUE);

2503
	innobase_open_tables = hash_create(200);
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	mysql_mutex_init(innobase_share_mutex_key,
			 &innobase_share_mutex,
			 MY_MUTEX_INIT_FAST);
	mysql_mutex_init(prepare_commit_mutex_key,
			 &prepare_commit_mutex, MY_MUTEX_INIT_FAST);
	mysql_mutex_init(commit_threads_m_key,
			 &commit_threads_m, MY_MUTEX_INIT_FAST);
	mysql_mutex_init(commit_cond_mutex_key,
			 &commit_cond_m, MY_MUTEX_INIT_FAST);
	mysql_cond_init(commit_cond_key, &commit_cond, NULL);
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	innodb_inited= 1;
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#ifdef MYSQL_DYNAMIC_PLUGIN
	if (innobase_hton != p) {
		innobase_hton = reinterpret_cast<handlerton*>(p);
		*innobase_hton = *innodb_hton_ptr;
	}
#endif /* MYSQL_DYNAMIC_PLUGIN */
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2521

2522
	/* Get the current high water mark format. */
2523
	innobase_file_format_max = (char*) trx_sys_file_format_max_get();
2524

2525
	btr_search_fully_disabled = (!btr_search_enabled);
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2526 2527
	DBUG_RETURN(FALSE);
error:
2528
	DBUG_RETURN(TRUE);
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2529 2530
}

2531
/*******************************************************************//**
2532 2533
Closes an InnoDB database.
@return	TRUE if error */
2534
static
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2535
int
2536 2537
innobase_end(
/*=========*/
2538
	handlerton*		hton,	/*!< in/out: InnoDB handlerton */
2539
	ha_panic_function	type __attribute__((unused)))
2540
					/*!< in: ha_panic() parameter */
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2541 2542 2543 2544
{
	int	err= 0;

	DBUG_ENTER("innobase_end");
2545
	DBUG_ASSERT(hton == innodb_hton_ptr);
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	if (innodb_inited) {

2549 2550
		srv_fast_shutdown = (ulint) innobase_fast_shutdown;
		innodb_inited = 0;
2551 2552
		hash_table_free(innobase_open_tables);
		innobase_open_tables = NULL;
2553 2554
		if (innobase_shutdown_for_mysql() != DB_SUCCESS) {
			err = 1;
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2555
		}
2556
		srv_free_paths_and_sizes();
2557
		my_free(internal_innobase_data_file_path);
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		mysql_mutex_destroy(&innobase_share_mutex);
		mysql_mutex_destroy(&prepare_commit_mutex);
		mysql_mutex_destroy(&commit_threads_m);
		mysql_mutex_destroy(&commit_cond_m);
		mysql_cond_destroy(&commit_cond);
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	}

2565
	DBUG_RETURN(err);
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}

2568
/****************************************************************//**
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2569
Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
2570 2571
the logs, and the name of this function should be innobase_checkpoint.
@return	TRUE if error */
2572
static
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bool
2574 2575
innobase_flush_logs(
/*================*/
2576
	handlerton*	hton)	/*!< in/out: InnoDB handlerton */
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2577
{
2578
	bool	result = 0;
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2579

2580
	DBUG_ENTER("innobase_flush_logs");
2581
	DBUG_ASSERT(hton == innodb_hton_ptr);
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	log_buffer_flush_to_disk();

2585
	DBUG_RETURN(result);
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}

2588
/****************************************************************//**
2589 2590 2591 2592 2593 2594 2595
Return alter table flags supported in an InnoDB database. */
static
uint
innobase_alter_table_flags(
/*=======================*/
	uint	flags)
{
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	return(HA_INPLACE_ADD_INDEX_NO_READ_WRITE
		| HA_INPLACE_ADD_INDEX_NO_WRITE
		| HA_INPLACE_DROP_INDEX_NO_READ_WRITE
		| HA_INPLACE_ADD_UNIQUE_INDEX_NO_READ_WRITE
		| HA_INPLACE_DROP_UNIQUE_INDEX_NO_READ_WRITE
		| HA_INPLACE_ADD_PK_INDEX_NO_READ_WRITE);
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}

2604
/*****************************************************************//**
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2605
Commits a transaction in an InnoDB database. */
2606
static
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void
innobase_commit_low(
/*================*/
2610
	trx_t*	trx)	/*!< in: transaction handle */
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{
2612
	if (trx_is_started(trx)) {
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2613

2614
		trx_commit_for_mysql(trx);
2615
	}
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}

2618
/*****************************************************************//**
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Creates an InnoDB transaction struct for the thd if it does not yet have one.
Starts a new InnoDB transaction if a transaction is not yet started. And
assigns a new snapshot for a consistent read if the transaction does not yet
2622 2623
have one.
@return	0 */
2624
static
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2625 2626 2627
int
innobase_start_trx_and_assign_read_view(
/*====================================*/
2628
        handlerton *hton, /*!< in: Innodb handlerton */
2629
	THD*	thd)	/*!< in: MySQL thread handle of the user for whom
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			the transaction should be committed */
{
	trx_t*	trx;

2634
	DBUG_ENTER("innobase_start_trx_and_assign_read_view");
2635
	DBUG_ASSERT(hton == innodb_hton_ptr);
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	/* Create a new trx struct for thd, if it does not yet have one */

2639
	trx = check_trx_exists(thd);
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	/* This is just to play safe: release a possible FIFO ticket and
	search latch. Since we will reserve the kernel mutex, we have to
	release the search system latch first to obey the latching order. */

	innobase_release_stat_resources(trx);

	/* If the transaction is not started yet, start it */

2649
	trx_start_if_not_started(trx);
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	/* Assign a read view if the transaction does not have it yet */

	trx_assign_read_view(trx);

	/* Set the MySQL flag to mark that there is an active transaction */

2657
	innobase_register_trx(hton, current_thd, trx);
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	DBUG_RETURN(0);
}

2662
/*****************************************************************//**
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2663
Commits a transaction in an InnoDB database or marks an SQL statement
2664 2665
ended.
@return	0 */
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static
int
innobase_commit(
/*============*/
2670
        handlerton *hton, /*!< in: Innodb handlerton */
2671
	THD* 	thd,	/*!< in: MySQL thread handle of the user for whom
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2672
			the transaction should be committed */
2673
	bool	all)	/*!< in:	TRUE - commit transaction
2674
				FALSE - the current SQL statement ended */
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{
	trx_t*		trx;

2678
	DBUG_ENTER("innobase_commit");
2679
	DBUG_ASSERT(hton == innodb_hton_ptr);
2680
	DBUG_PRINT("trans", ("ending transaction"));
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2681

2682
	trx = check_trx_exists(thd);
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2683

2684 2685
	/* Since we will reserve the kernel mutex, we have to release
	the search system latch first to obey the latching order. */
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2686

2687
	if (trx->has_search_latch) {
2688
		trx_search_latch_release_if_reserved(trx);
2689 2690
	}

2691 2692 2693 2694
	/* Transaction is deregistered only in a commit or a rollback. If
	it is deregistered we know there cannot be resources to be freed
	and we could return immediately.  For the time being, we play safe
	and do the cleanup though there should be nothing to clean up. */
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2696
	if (!trx_is_registered_for_2pc(trx) && trx_is_started(trx)) {
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2697

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		sql_print_error("Transaction not registered for MySQL 2PC, "
				"but transaction is active");
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2700
	}
2701

2702
	if (all
2703
	    || (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
2704 2705

		/* We were instructed to commit the whole transaction, or
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		this is an SQL statement end and autocommit is on */

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		/* We need current binlog position for ibbackup to work.
		Note, the position is current because of
		prepare_commit_mutex */
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retry:
2712
		if (innobase_commit_concurrency > 0) {
2713
			mysql_mutex_lock(&commit_cond_m);
2714 2715
			commit_threads++;

2716
			if (commit_threads > innobase_commit_concurrency) {
2717
				commit_threads--;
2718
				mysql_cond_wait(&commit_cond,
2719
					&commit_cond_m);
2720
				mysql_mutex_unlock(&commit_cond_m);
2721 2722 2723
				goto retry;
			}
			else {
2724
				mysql_mutex_unlock(&commit_cond_m);
2725 2726 2727
			}
		}

2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740
		/* The following calls to read the MySQL binary log
		file name and the position return consistent results:
		1) Other InnoDB transactions cannot intervene between
		these calls as we are holding prepare_commit_mutex.
		2) Binary logging of other engines is not relevant
		to InnoDB as all InnoDB requires is that committing
		InnoDB transactions appear in the same order in the
		MySQL binary log as they appear in InnoDB logs.
		3) A MySQL log file rotation cannot happen because
		MySQL protects against this by having a counter of
		transactions in prepared state and it only allows
		a rotation when the counter drops to zero. See
		LOCK_prep_xids and COND_prep_xids in log.cc. */
2741
		trx->mysql_log_file_name = mysql_bin_log_file_name();
2742
		trx->mysql_log_offset = (ib_int64_t) mysql_bin_log_file_pos();
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2743

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2744 2745 2746 2747
		/* Don't do write + flush right now. For group commit
		to work we want to do the flush after releasing the
		prepare_commit_mutex. */
		trx->flush_log_later = TRUE;
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2748
		innobase_commit_low(trx);
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2749
		trx->flush_log_later = FALSE;
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2750

2751
		if (innobase_commit_concurrency > 0) {
2752
			mysql_mutex_lock(&commit_cond_m);
2753
			commit_threads--;
2754 2755
			mysql_cond_signal(&commit_cond);
			mysql_mutex_unlock(&commit_cond_m);
2756 2757
		}

2758 2759
		if (trx_has_prepare_commit_mutex(trx)) {
  
2760
			mysql_mutex_unlock(&prepare_commit_mutex);
2761 2762 2763
  		}
  
		trx_deregister_from_2pc(trx);
2764

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2765 2766
		/* Now do a write + flush of logs. */
		trx_commit_complete_for_mysql(trx);
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2767
	} else {
2768
		/* We just mark the SQL statement ended and do not do a
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2769 2770
		transaction commit */

2771 2772 2773 2774
		/* If we had reserved the auto-inc lock for some
		table in this SQL statement we release it now */

		row_unlock_table_autoinc_for_mysql(trx);
2775

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2776 2777 2778 2779 2780 2781 2782
		/* Store the current undo_no of the transaction so that we
		know where to roll back if we have to roll back the next
		SQL statement */

		trx_mark_sql_stat_end(trx);
	}

2783 2784
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

2785
	if (trx->declared_to_be_inside_innodb) {
2786
		/* Release our possible ticket in the FIFO */
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2787

2788
		srv_conc_force_exit_innodb(trx);
2789
	}
2790 2791 2792

	/* Tell the InnoDB server that there might be work for utility
	threads: */
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	srv_active_wake_master_thread();

	DBUG_RETURN(0);
}

2798
/*****************************************************************//**
2799 2800
Rolls back a transaction or the latest SQL statement.
@return	0 or error number */
2801 2802
static
int
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2803 2804
innobase_rollback(
/*==============*/
2805 2806
        handlerton *hton, /*!< in: Innodb handlerton */ 
	THD*	thd,	/*!< in: handle to the MySQL thread of the user
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			whose transaction should be rolled back */
2808
	bool	all)	/*!< in:	TRUE - commit transaction
2809
				FALSE - the current SQL statement ended */
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{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_rollback");
2815
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2816 2817
	DBUG_PRINT("trans", ("aborting transaction"));

2818
	trx = check_trx_exists(thd);
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2819 2820 2821 2822 2823 2824 2825

	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

2826 2827
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

2828 2829 2830
	/* If we had reserved the auto-inc lock for some table (if
	we come here to roll back the latest SQL statement) we
	release it now before a possibly lengthy rollback */
2831

2832
	row_unlock_table_autoinc_for_mysql(trx);
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2833

2834
	if (all
2835
	    || !thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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2836 2837

		error = trx_rollback_for_mysql(trx);
2838
		trx_deregister_from_2pc(trx);
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2839 2840 2841 2842
	} else {
		error = trx_rollback_last_sql_stat_for_mysql(trx);
	}

2843
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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2844 2845
}

2846
/*****************************************************************//**
2847 2848
Rolls back a transaction
@return	0 or error number */
2849
static
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2850 2851 2852
int
innobase_rollback_trx(
/*==================*/
2853
	trx_t*	trx)	/*!< in: transaction */
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2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
{
	int	error = 0;

	DBUG_ENTER("innobase_rollback_trx");
	DBUG_PRINT("trans", ("aborting transaction"));

	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

2866 2867 2868
	/* If we had reserved the auto-inc lock for some table (if
	we come here to roll back the latest SQL statement) we
	release it now before a possibly lengthy rollback */
2869

2870
	row_unlock_table_autoinc_for_mysql(trx);
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2871 2872 2873

	error = trx_rollback_for_mysql(trx);

2874
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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2875 2876
}

2877
/*****************************************************************//**
2878
Rolls back a transaction to a savepoint.
2879 2880
@return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the
given name */
2881 2882
static
int
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2883 2884
innobase_rollback_to_savepoint(
/*===========================*/
2885 2886
        handlerton *hton,       /*!< in: Innodb handlerton */ 
	THD*	thd,		/*!< in: handle to the MySQL thread of the user
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2887
				whose transaction should be rolled back */
2888
	void*	savepoint)	/*!< in: savepoint data */
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{
2890
	ib_int64_t	mysql_binlog_cache_pos;
2891 2892 2893
	int		error = 0;
	trx_t*		trx;
	char		name[64];
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2894 2895

	DBUG_ENTER("innobase_rollback_to_savepoint");
2896
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2897

2898
	trx = check_trx_exists(thd);
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2899 2900 2901 2902 2903 2904 2905

	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

2906
	/* TODO: use provided savepoint data area to store savepoint data */
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2907

2908
	longlong2str((ulint)savepoint, name, 36);
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2909

2910
	error = (int) trx_rollback_to_savepoint_for_mysql(trx, name,
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2911
						&mysql_binlog_cache_pos);
2912
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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2913 2914
}

2915
/*****************************************************************//**
2916
Release transaction savepoint name.
2917 2918
@return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the
given name */
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2919 2920 2921 2922
static
int
innobase_release_savepoint(
/*=======================*/
2923 2924
        handlerton*	hton,	/*!< in: handlerton for Innodb */
	THD*	thd,		/*!< in: handle to the MySQL thread of the user
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2925
				whose transaction should be rolled back */
2926
	void*	savepoint)	/*!< in: savepoint data */
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{
2928 2929 2930
	int		error = 0;
	trx_t*		trx;
	char		name[64];
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2931 2932

	DBUG_ENTER("innobase_release_savepoint");
2933
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2934

2935
	trx = check_trx_exists(thd);
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2936

2937
	/* TODO: use provided savepoint data area to store savepoint data */
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2938

2939
	longlong2str((ulint)savepoint, name, 36);
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2940 2941 2942

	error = (int) trx_release_savepoint_for_mysql(trx, name);

2943
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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2944 2945
}

2946
/*****************************************************************//**
2947 2948
Sets a transaction savepoint.
@return	always 0, that is, always succeeds */
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2949 2950 2951 2952
static
int
innobase_savepoint(
/*===============*/
2953 2954 2955
	handlerton*	hton,   /*!< in: handle to the Innodb handlerton */
	THD*	thd,		/*!< in: handle to the MySQL thread */
	void*	savepoint)	/*!< in: savepoint data */
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2956 2957 2958 2959 2960
{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_savepoint");
2961
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2962

2963 2964 2965 2966 2967
	/*
	  In the autocommit mode there is no sense to set a savepoint
	  (unless we are in sub-statement), so SQL layer ensures that
	  this method is never called in such situation.
	*/
2968 2969
#ifdef MYSQL_SERVER /* plugins cannot access thd->in_sub_stmt */
	DBUG_ASSERT(thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) ||
2970
		thd->in_sub_stmt);
2971
#endif /* MYSQL_SERVER */
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2972

2973
	trx = check_trx_exists(thd);
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2974 2975 2976 2977 2978 2979 2980

	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

2981 2982
	/* Cannot happen outside of transaction */
	DBUG_ASSERT(trx_is_registered_for_2pc(trx));
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2983

2984 2985 2986
	/* TODO: use provided savepoint data area to store savepoint data */
	char name[64];
	longlong2str((ulint)savepoint,name,36);
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2987

2988
	error = (int) trx_savepoint_for_mysql(trx, name, (ib_int64_t)0);
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2989

2990
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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2991 2992
}

2993
/*****************************************************************//**
2994 2995
Frees a possible InnoDB trx object associated with the current THD.
@return	0 or error number */
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2996 2997 2998 2999
static
int
innobase_close_connection(
/*======================*/
3000 3001
        handlerton*	hton,	/*!< in:  innobase handlerton */
	THD*	thd)	/*!< in: handle to the MySQL thread of the user
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3002 3003 3004 3005
			whose resources should be free'd */
{
	trx_t*	trx;

3006 3007 3008
	DBUG_ENTER("innobase_close_connection");
	DBUG_ASSERT(hton == innodb_hton_ptr);
	trx = thd_to_trx(thd);
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3009 3010 3011

	ut_a(trx);

3012
	if (!trx_is_registered_for_2pc(trx) && trx_is_started(trx)) {
3013

3014 3015
		sql_print_error("Transaction not registered for MySQL 2PC, "
				"but transaction is active");
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3016 3017 3018
	}


3019 3020
	if (trx_is_started(trx) && global_system_variables.log_warnings) {

3021 3022
		sql_print_warning(
			"MySQL is closing a connection that has an active "
3023
			"InnoDB transaction.  %llu row modifications will "
3024
			"roll back.",
3025
			(ullint) trx->undo_no);
3026
	}
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3027 3028 3029

	innobase_rollback_trx(trx);

3030
	thr_local_free(trx->mysql_thread_id);
3031
	trx_free_for_mysql(trx);
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3032

3033
	DBUG_RETURN(0);
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3034 3035 3036
}


3037
/*************************************************************************//**
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3038 3039 3040
** InnoDB database tables
*****************************************************************************/

3041
/****************************************************************//**
3042
Get the record format from the data dictionary.
3043 3044
@return one of ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT,
ROW_TYPE_COMPRESSED, ROW_TYPE_DYNAMIC */
3045
UNIV_INTERN
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3046 3047 3048 3049 3050
enum row_type
ha_innobase::get_row_type() const
/*=============================*/
{
	if (prebuilt && prebuilt->table) {
3051 3052 3053
		const ulint	flags = prebuilt->table->flags;

		if (UNIV_UNLIKELY(!flags)) {
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3054 3055
			return(ROW_TYPE_REDUNDANT);
		}
3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071

		ut_ad(flags & DICT_TF_COMPACT);

		switch (flags & DICT_TF_FORMAT_MASK) {
		case DICT_TF_FORMAT_51 << DICT_TF_FORMAT_SHIFT:
			return(ROW_TYPE_COMPACT);
		case DICT_TF_FORMAT_ZIP << DICT_TF_FORMAT_SHIFT:
			if (flags & DICT_TF_ZSSIZE_MASK) {
				return(ROW_TYPE_COMPRESSED);
			} else {
				return(ROW_TYPE_DYNAMIC);
			}
#if DICT_TF_FORMAT_ZIP != DICT_TF_FORMAT_MAX
# error "DICT_TF_FORMAT_ZIP != DICT_TF_FORMAT_MAX"
#endif
		}
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3072 3073 3074 3075 3076
	}
	ut_ad(0);
	return(ROW_TYPE_NOT_USED);
}

3077 3078


3079
/****************************************************************//**
3080 3081
Get the table flags to use for the statement.
@return	table flags */
3082
UNIV_INTERN
3083 3084
handler::Table_flags
ha_innobase::table_flags() const
3085
/*============================*/
3086 3087 3088
{
       /* Need to use tx_isolation here since table flags is (also)
          called before prebuilt is inited. */
3089
        ulong const tx_isolation = thd_tx_isolation(ha_thd());
3090 3091 3092 3093 3094
        if (tx_isolation <= ISO_READ_COMMITTED)
                return int_table_flags;
        return int_table_flags | HA_BINLOG_STMT_CAPABLE;
}

3095
/****************************************************************//**
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3096 3097 3098 3099 3100 3101
Gives the file extension of an InnoDB single-table tablespace. */
static const char* ha_innobase_exts[] = {
  ".ibd",
  NullS
};

3102
/****************************************************************//**
3103 3104
Returns the table type (storage engine name).
@return	table type */
3105 3106 3107 3108 3109 3110 3111 3112
UNIV_INTERN
const char*
ha_innobase::table_type() const
/*===========================*/
{
	return(innobase_hton_name);
}

3113
/****************************************************************//**
3114
Returns the index type. */
3115 3116
UNIV_INTERN
const char*
3117 3118 3119
ha_innobase::index_type(
/*====================*/
	uint)
3120
				/*!< out: index type */
3121 3122 3123 3124
{
	return("BTREE");
}

3125
/****************************************************************//**
3126 3127
Returns the table file name extension.
@return	file extension string */
3128
UNIV_INTERN
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3129 3130 3131 3132
const char**
ha_innobase::bas_ext() const
/*========================*/
{
3133
	return(ha_innobase_exts);
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3134 3135
}

3136
/****************************************************************//**
3137 3138
Returns the operations supported for indexes.
@return	flags of supported operations */
3139 3140
UNIV_INTERN
ulong
3141 3142 3143 3144 3145 3146
ha_innobase::index_flags(
/*=====================*/
	uint,
	uint,
	bool)
const
3147 3148 3149 3150 3151
{
	return(HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER
	       | HA_READ_RANGE | HA_KEYREAD_ONLY);
}

3152
/****************************************************************//**
3153 3154
Returns the maximum number of keys.
@return	MAX_KEY */
3155 3156 3157
UNIV_INTERN
uint
ha_innobase::max_supported_keys() const
3158
/*===================================*/
3159 3160 3161 3162
{
	return(MAX_KEY);
}

3163
/****************************************************************//**
3164 3165
Returns the maximum key length.
@return	maximum supported key length, in bytes */
3166 3167 3168
UNIV_INTERN
uint
ha_innobase::max_supported_key_length() const
3169
/*=========================================*/
3170 3171 3172 3173 3174 3175 3176 3177 3178
{
	/* An InnoDB page must store >= 2 keys; a secondary key record
	must also contain the primary key value: max key length is
	therefore set to slightly less than 1 / 4 of page size which
	is 16 kB; but currently MySQL does not work with keys whose
	size is > MAX_KEY_LENGTH */
	return(3500);
}

3179
/****************************************************************//**
3180 3181
Returns the key map of keys that are usable for scanning.
@return	key_map_full */
3182 3183 3184 3185 3186 3187 3188
UNIV_INTERN
const key_map*
ha_innobase::keys_to_use_for_scanning()
{
	return(&key_map_full);
}

3189
/****************************************************************//**
3190 3191
Determines if table caching is supported.
@return	HA_CACHE_TBL_ASKTRANSACT */
3192 3193 3194 3195 3196 3197 3198
UNIV_INTERN
uint8
ha_innobase::table_cache_type()
{
	return(HA_CACHE_TBL_ASKTRANSACT);
}

3199
/****************************************************************//**
3200 3201
Determines if the primary key is clustered index.
@return	true */
3202 3203 3204 3205 3206 3207
UNIV_INTERN
bool
ha_innobase::primary_key_is_clustered()
{
	return(true);
}
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3208

3209
/*****************************************************************//**
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3210 3211 3212 3213 3214 3215 3216 3217
Normalizes a table name string. A normalized name consists of the
database name catenated to '/' and table name. An example:
test/mytable. On Windows normalization puts both the database name and the
table name always to lower case. */
static
void
normalize_table_name(
/*=================*/
3218
	char*		norm_name,	/*!< out: normalized name as a
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					null-terminated string */
3220
	const char*	name)		/*!< in: table name string */
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{
	char*	name_ptr;
	char*	db_ptr;
	char*	ptr;

	/* Scan name from the end */

	ptr = strend(name)-1;

	while (ptr >= name && *ptr != '\\' && *ptr != '/') {
		ptr--;
	}

	name_ptr = ptr + 1;

	DBUG_ASSERT(ptr > name);

	ptr--;

	while (ptr >= name && *ptr != '\\' && *ptr != '/') {
		ptr--;
	}

	db_ptr = ptr + 1;

	memcpy(norm_name, db_ptr, strlen(name) + 1 - (db_ptr - name));

	norm_name[name_ptr - db_ptr - 1] = '/';

#ifdef __WIN__
	innobase_casedn_str(norm_name);
#endif
}

3255
/********************************************************************//**
3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316
Get the upper limit of the MySQL integral and floating-point type.
@return maximum allowed value for the field */
static
ulonglong
innobase_get_int_col_max_value(
/*===========================*/
	const Field*	field)	/*!< in: MySQL field */
{
	ulonglong	max_value = 0;

	switch(field->key_type()) {
	/* TINY */
	case HA_KEYTYPE_BINARY:
		max_value = 0xFFULL;
		break;
	case HA_KEYTYPE_INT8:
		max_value = 0x7FULL;
		break;
	/* SHORT */
	case HA_KEYTYPE_USHORT_INT:
		max_value = 0xFFFFULL;
		break;
	case HA_KEYTYPE_SHORT_INT:
		max_value = 0x7FFFULL;
		break;
	/* MEDIUM */
	case HA_KEYTYPE_UINT24:
		max_value = 0xFFFFFFULL;
		break;
	case HA_KEYTYPE_INT24:
		max_value = 0x7FFFFFULL;
		break;
	/* LONG */
	case HA_KEYTYPE_ULONG_INT:
		max_value = 0xFFFFFFFFULL;
		break;
	case HA_KEYTYPE_LONG_INT:
		max_value = 0x7FFFFFFFULL;
		break;
	/* BIG */
	case HA_KEYTYPE_ULONGLONG:
		max_value = 0xFFFFFFFFFFFFFFFFULL;
		break;
	case HA_KEYTYPE_LONGLONG:
		max_value = 0x7FFFFFFFFFFFFFFFULL;
		break;
	case HA_KEYTYPE_FLOAT:
		/* We use the maximum as per IEEE754-2008 standard, 2^24 */
		max_value = 0x1000000ULL;
		break;
	case HA_KEYTYPE_DOUBLE:
		/* We use the maximum as per IEEE754-2008 standard, 2^53 */
		max_value = 0x20000000000000ULL;
		break;
	default:
		ut_error;
	}

	return(max_value);
}

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/*******************************************************************//**
This function checks whether the index column information
is consistent between KEY info from mysql and that from innodb index.
@return TRUE if all column types match. */
static
ibool
innobase_match_index_columns(
/*=========================*/
	const KEY*		key_info,	/*!< in: Index info
						from mysql */
	const dict_index_t*	index_info)	/*!< in: Index info
						from Innodb */
{
	const KEY_PART_INFO*	key_part;
	const KEY_PART_INFO*	key_end;
	const dict_field_t*	innodb_idx_fld;
	const dict_field_t*	innodb_idx_fld_end;

	DBUG_ENTER("innobase_match_index_columns");

	/* Check whether user defined index column count matches */
	if (key_info->key_parts != index_info->n_user_defined_cols) {
		DBUG_RETURN(FALSE);
	}

	key_part = key_info->key_part;
	key_end = key_part + key_info->key_parts;
	innodb_idx_fld = index_info->fields;
	innodb_idx_fld_end = index_info->fields + index_info->n_fields;

	/* Check each index column's datatype. We do not check
	column name because there exists case that index
	column name got modified in mysql but such change does not
	propagate to InnoDB.
	One hidden assumption here is that the index column sequences
	are matched up between those in mysql and Innodb. */
	for (; key_part != key_end; ++key_part) {
		ulint	col_type;
		ibool	is_unsigned;
		ulint	mtype = innodb_idx_fld->col->mtype;

		/* Need to translate to InnoDB column type before
		comparison. */
		col_type = get_innobase_type_from_mysql_type(&is_unsigned,
							     key_part->field);

		/* Ignore Innodb specific system columns. */
		while (mtype == DATA_SYS) {
			innodb_idx_fld++;

			if (innodb_idx_fld >= innodb_idx_fld_end) {
				DBUG_RETURN(FALSE);
			}
		}

		if (col_type != mtype) {
			/* Column Type mismatches */
			DBUG_RETURN(FALSE);
		}

		innodb_idx_fld++;
	}

	DBUG_RETURN(TRUE);
}

/*******************************************************************//**
This function builds a translation table in INNOBASE_SHARE
structure for fast index location with mysql array number from its
table->key_info structure. This also provides the necessary translation
between the key order in mysql key_info and Innodb ib_table->indexes if
they are not fully matched with each other.
Note we do not have any mutex protecting the translation table
building based on the assumption that there is no concurrent
index creation/drop and DMLs that requires index lookup. All table
handle will be closed before the index creation/drop.
@return TRUE if index translation table built successfully */
static
ibool
innobase_build_index_translation(
/*=============================*/
	const TABLE*		table,	  /*!< in: table in MySQL data
					  dictionary */
	dict_table_t*		ib_table, /*!< in: table in Innodb data
					  dictionary */
	INNOBASE_SHARE*		share)	  /*!< in/out: share structure
					  where index translation table
					  will be constructed in. */
{
	ulint		mysql_num_index;
	ulint		ib_num_index;
	dict_index_t**	index_mapping;
	ibool		ret = TRUE;

	DBUG_ENTER("innobase_build_index_translation");

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	mutex_enter(&dict_sys->mutex);

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	mysql_num_index = table->s->keys;
	ib_num_index = UT_LIST_GET_LEN(ib_table->indexes);

	index_mapping = share->idx_trans_tbl.index_mapping;

	/* If there exists inconsistency between MySQL and InnoDB dictionary
	(metadata) information, the number of index defined in MySQL
	could exceed that in InnoDB, do not build index translation
	table in such case */
	if (UNIV_UNLIKELY(ib_num_index < mysql_num_index)) {
		ret = FALSE;
		goto func_exit;
	}

	/* If index entry count is non-zero, nothing has
	changed since last update, directly return TRUE */
	if (share->idx_trans_tbl.index_count) {
		/* Index entry count should still match mysql_num_index */
		ut_a(share->idx_trans_tbl.index_count == mysql_num_index);
		goto func_exit;
	}

	/* The number of index increased, rebuild the mapping table */
	if (mysql_num_index > share->idx_trans_tbl.array_size) {
		index_mapping = (dict_index_t**) my_realloc(index_mapping,
							mysql_num_index *
							sizeof(*index_mapping),
							MYF(MY_ALLOW_ZERO_PTR));

		if (!index_mapping) {
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			/* Report an error if index_mapping continues to be
			NULL and mysql_num_index is a non-zero value */
			sql_print_error("InnoDB: fail to allocate memory for "
					"index translation table. Number of "
					"Index:%lu, array size:%lu",
					mysql_num_index,
					share->idx_trans_tbl.array_size);
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			ret = FALSE;
			goto func_exit;
		}

		share->idx_trans_tbl.array_size = mysql_num_index;
	}

	/* For each index in the mysql key_info array, fetch its
	corresponding InnoDB index pointer into index_mapping
	array. */
	for (ulint count = 0; count < mysql_num_index; count++) {

		/* Fetch index pointers into index_mapping according to mysql
		index sequence */
		index_mapping[count] = dict_table_get_index_on_name(
			ib_table, table->key_info[count].name);

		if (!index_mapping[count]) {
			sql_print_error("Cannot find index %s in InnoDB "
					"index dictionary.",
					table->key_info[count].name);
			ret = FALSE;
			goto func_exit;
		}

		/* Double check fetched index has the same
		column info as those in mysql key_info. */
		if (!innobase_match_index_columns(&table->key_info[count],
					          index_mapping[count])) {
			sql_print_error("Found index %s whose column info "
					"does not match that of MySQL.",
					table->key_info[count].name);
			ret = FALSE;
			goto func_exit;
		}
	}

	/* Successfully built the translation table */
	share->idx_trans_tbl.index_count = mysql_num_index;

func_exit:
	if (!ret) {
		/* Build translation table failed. */
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		my_free(index_mapping);
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		share->idx_trans_tbl.array_size = 0;
		share->idx_trans_tbl.index_count = 0;
		index_mapping = NULL;
	}

	share->idx_trans_tbl.index_mapping = index_mapping;

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	mutex_exit(&dict_sys->mutex);

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	DBUG_RETURN(ret);
}

/*******************************************************************//**
This function uses index translation table to quickly locate the
requested index structure.
Note we do not have mutex protection for the index translatoin table
access, it is based on the assumption that there is no concurrent
translation table rebuild (fter create/drop index) and DMLs that
require index lookup.
@return dict_index_t structure for requested index. NULL if
fail to locate the index structure. */
static
dict_index_t*
innobase_index_lookup(
/*==================*/
	INNOBASE_SHARE*	share,	/*!< in: share structure for index
				translation table. */
	uint		keynr)	/*!< in: index number for the requested
				index */
{
	if (!share->idx_trans_tbl.index_mapping
	    || keynr >= share->idx_trans_tbl.index_count) {
		return(NULL);
	}

	return(share->idx_trans_tbl.index_mapping[keynr]);
}

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/************************************************************************
3536
Set the autoinc column max value. This should only be called once from
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ha_innobase::open(). Therefore there's no need for a covering lock. */
3538
UNIV_INTERN
3539
void
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ha_innobase::innobase_initialize_autoinc()
/*======================================*/
{
	ulonglong	auto_inc;
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	const Field*	field = table->found_next_number_field;
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	if (field != NULL) {
		auto_inc = innobase_get_int_col_max_value(field);
	} else {
		/* We have no idea what's been passed in to us as the
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		autoinc column. We set it to the 0, effectively disabling
		updates to the table. */
		auto_inc = 0;
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		ut_print_timestamp(stderr);
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		fprintf(stderr, "  InnoDB: Unable to determine the AUTOINC "
				"column name\n");
	}
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	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {
		/* If the recovery level is set so high that writes
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		are disabled we force the AUTOINC counter to 0
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		value effectively disabling writes to the table.
		Secondly, we avoid reading the table in case the read
		results in failure due to a corrupted table/index.

		We will not return an error to the client, so that the
		tables can be dumped with minimal hassle.  If an error
		were returned in this case, the first attempt to read
		the table would fail and subsequent SELECTs would succeed. */
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		auto_inc = 0;
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	} else if (field == NULL) {
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		/* This is a far more serious error, best to avoid
		opening the table and return failure. */
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		my_error(ER_AUTOINC_READ_FAILED, MYF(0));
	} else {
		dict_index_t*	index;
		const char*	col_name;
		ulonglong	read_auto_inc;
		ulint		err;

		update_thd(ha_thd());
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		ut_a(prebuilt->trx == thd_to_trx(user_thd));

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		col_name = field->field_name;
		index = innobase_get_index(table->s->next_number_index);

		/* Execute SELECT MAX(col_name) FROM TABLE; */
		err = row_search_max_autoinc(index, col_name, &read_auto_inc);

		switch (err) {
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		case DB_SUCCESS: {
			ulonglong	col_max_value;

			col_max_value = innobase_get_int_col_max_value(field);

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			/* At the this stage we do not know the increment
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			nor the offset, so use a default increment of 1. */
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			auto_inc = innobase_next_autoinc(
				read_auto_inc, 1, 1, col_max_value);
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			break;
		}
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		case DB_RECORD_NOT_FOUND:
			ut_print_timestamp(stderr);
			fprintf(stderr, "  InnoDB: MySQL and InnoDB data "
				"dictionaries are out of sync.\n"
				"InnoDB: Unable to find the AUTOINC column "
				"%s in the InnoDB table %s.\n"
				"InnoDB: We set the next AUTOINC column "
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				"value to 0,\n"
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				"InnoDB: in effect disabling the AUTOINC "
				"next value generation.\n"
				"InnoDB: You can either set the next "
				"AUTOINC value explicitly using ALTER TABLE\n"
				"InnoDB: or fix the data dictionary by "
				"recreating the table.\n",
				col_name, index->table->name);

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			/* This will disable the AUTOINC generation. */
			auto_inc = 0;

			/* We want the open to succeed, so that the user can
			take corrective action. ie. reads should succeed but
			updates should fail. */
			err = DB_SUCCESS;
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			break;
		default:
			/* row_search_max_autoinc() should only return
			one of DB_SUCCESS or DB_RECORD_NOT_FOUND. */
			ut_error;
		}
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	}

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	dict_table_autoinc_initialize(prebuilt->table, auto_inc);
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}

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/*****************************************************************//**
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Creates and opens a handle to a table which already exists in an InnoDB
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database.
@return	1 if error, 0 if success */
3643
UNIV_INTERN
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int
ha_innobase::open(
/*==============*/
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	const char*	name,		/*!< in: table name */
	int		mode,		/*!< in: not used */
	uint		test_if_locked)	/*!< in: not used */
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{
	dict_table_t*	ib_table;
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	char		norm_name[1000];
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	THD*		thd;
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	ulint		retries = 0;
	char*		is_part = NULL;
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	DBUG_ENTER("ha_innobase::open");

	UT_NOT_USED(mode);
	UT_NOT_USED(test_if_locked);

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	thd = ha_thd();
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	srv_lower_case_table_names = lower_case_table_names;
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	/* Under some cases MySQL seems to call this function while
	holding btr_search_latch. This breaks the latching order as
	we acquire dict_sys->mutex below and leads to a deadlock. */
	if (thd != NULL) {
		innobase_release_temporary_latches(ht, thd);
	}

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	normalize_table_name(norm_name, name);

	user_thd = NULL;

	if (!(share=get_share(name))) {

		DBUG_RETURN(1);
	}

	/* Create buffers for packing the fields of a record. Why
	table->reclength did not work here? Obviously, because char
	fields when packed actually became 1 byte longer, when we also
	stored the string length as the first byte. */

	upd_and_key_val_buff_len =
				table->s->reclength + table->s->max_key_length
							+ MAX_REF_PARTS * 3;
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	if (!(uchar*) my_multi_malloc(MYF(MY_WME),
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			&upd_buff, upd_and_key_val_buff_len,
			&key_val_buff, upd_and_key_val_buff_len,
			NullS)) {
		free_share(share);
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		DBUG_RETURN(1);
	}
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	/* We look for pattern #P# to see if the table is partitioned
	MySQL table. The retry logic for partitioned tables is a
	workaround for http://bugs.mysql.com/bug.php?id=33349. Look
	at support issue https://support.mysql.com/view.php?id=21080
	for more details. */
	is_part = strstr(norm_name, "#P#");
retry:
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	/* Get pointer to a table object in InnoDB dictionary cache */
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	ib_table = dict_table_get(norm_name, TRUE);
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	if (NULL == ib_table) {
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		if (is_part && retries < 10) {
			++retries;
			os_thread_sleep(100000);
			goto retry;
		}

		if (is_part) {
			sql_print_error("Failed to open table %s after "
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					"%lu attempts.\n", norm_name,
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					retries);
		}

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		sql_print_error("Cannot find or open table %s from\n"
				"the internal data dictionary of InnoDB "
				"though the .frm file for the\n"
				"table exists. Maybe you have deleted and "
				"recreated InnoDB data\n"
				"files but have forgotten to delete the "
				"corresponding .frm files\n"
				"of InnoDB tables, or you have moved .frm "
				"files to another database?\n"
				"or, the table contains indexes that this "
				"version of the engine\n"
				"doesn't support.\n"
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				"See " REFMAN "innodb-troubleshooting.html\n"
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				"how you can resolve the problem.\n",
				norm_name);
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		free_share(share);
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		my_free(upd_buff);
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		my_errno = ENOENT;
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		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
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	if (ib_table->ibd_file_missing && !thd_tablespace_op(thd)) {
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		sql_print_error("MySQL is trying to open a table handle but "
				"the .ibd file for\ntable %s does not exist.\n"
				"Have you deleted the .ibd file from the "
				"database directory under\nthe MySQL datadir, "
				"or have you used DISCARD TABLESPACE?\n"
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				"See " REFMAN "innodb-troubleshooting.html\n"
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				"how you can resolve the problem.\n",
				norm_name);
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		free_share(share);
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		my_free(upd_buff);
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		my_errno = ENOENT;
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		dict_table_decrement_handle_count(ib_table, FALSE);
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		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
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	prebuilt = row_create_prebuilt(ib_table);
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	prebuilt->mysql_row_len = table->s->reclength;
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	prebuilt->default_rec = table->s->default_values;
	ut_ad(prebuilt->default_rec);
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	/* Looks like MySQL-3.23 sometimes has primary key number != 0 */

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	primary_key = table->s->primary_key;
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	key_used_on_scan = primary_key;

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	if (!innobase_build_index_translation(table, ib_table, share)) {
		  sql_print_error("Build InnoDB index translation table for"
				  " Table %s failed", name);
	}

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	/* Allocate a buffer for a 'row reference'. A row reference is
	a string of bytes of length ref_length which uniquely specifies
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	a row in our table. Note that MySQL may also compare two row
	references for equality by doing a simple memcmp on the strings
	of length ref_length! */
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	if (!row_table_got_default_clust_index(ib_table)) {
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		prebuilt->clust_index_was_generated = FALSE;

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		if (UNIV_UNLIKELY(primary_key >= MAX_KEY)) {
			sql_print_error("Table %s has a primary key in "
					"InnoDB data dictionary, but not "
					"in MySQL!", name);

			/* This mismatch could cause further problems
			if not attended, bring this to the user's attention
			by printing a warning in addition to log a message
			in the errorlog */
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_NO_SUCH_INDEX,
					    "InnoDB: Table %s has a "
					    "primary key in InnoDB data "
					    "dictionary, but not in "
					    "MySQL!", name);

			/* If primary_key >= MAX_KEY, its (primary_key)
			value could be out of bound if continue to index
			into key_info[] array. Find InnoDB primary index,
			and assign its key_length to ref_length.
			In addition, since MySQL indexes are sorted starting
			with primary index, unique index etc., initialize
			ref_length to the first index key length in
			case we fail to find InnoDB cluster index.

			Please note, this will not resolve the primary
			index mismatch problem, other side effects are
			possible if users continue to use the table.
			However, we allow this table to be opened so
			that user can adopt necessary measures for the
			mismatch while still being accessible to the table
			date. */
			ref_length = table->key_info[0].key_length;

			/* Find correspoinding cluster index
			key length in MySQL's key_info[] array */
			for (ulint i = 0; i < table->s->keys; i++) {
				dict_index_t*	index;
				index = innobase_get_index(i);
				if (dict_index_is_clust(index)) {
					ref_length =
						 table->key_info[i].key_length;
				}
			}
		} else {
			/* MySQL allocates the buffer for ref.
			key_info->key_length includes space for all key
			columns + one byte for each column that may be
			NULL. ref_length must be as exact as possible to
			save space, because all row reference buffers are
			allocated based on ref_length. */
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			ref_length = table->key_info[primary_key].key_length;
		}
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	} else {
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		if (primary_key != MAX_KEY) {
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			sql_print_error(
				"Table %s has no primary key in InnoDB data "
				"dictionary, but has one in MySQL! If you "
				"created the table with a MySQL version < "
				"3.23.54 and did not define a primary key, "
				"but defined a unique key with all non-NULL "
				"columns, then MySQL internally treats that "
				"key as the primary key. You can fix this "
				"error by dump + DROP + CREATE + reimport "
				"of the table.", name);

			/* This mismatch could cause further problems
			if not attended, bring this to the user attention
			by printing a warning in addition to log a message
			in the errorlog */
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_NO_SUCH_INDEX,
					    "InnoDB: Table %s has no "
					    "primary key in InnoDB data "
					    "dictionary, but has one in "
					    "MySQL!", name);
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		}

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		prebuilt->clust_index_was_generated = TRUE;
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		ref_length = DATA_ROW_ID_LEN;
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		/* If we automatically created the clustered index, then
		MySQL does not know about it, and MySQL must NOT be aware
		of the index used on scan, to make it avoid checking if we
		update the column of the index. That is why we assert below
		that key_used_on_scan is the undefined value MAX_KEY.
		The column is the row id in the automatical generation case,
		and it will never be updated anyway. */
3876

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		if (key_used_on_scan != MAX_KEY) {
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			sql_print_warning(
				"Table %s key_used_on_scan is %lu even "
				"though there is no primary key inside "
				"InnoDB.", name, (ulong) key_used_on_scan);
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		}
	}

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	/* Index block size in InnoDB: used by MySQL in query optimization */
	stats.block_size = 16 * 1024;
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	/* Init table lock structure */
	thr_lock_data_init(&share->lock,&lock,(void*) 0);

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	if (prebuilt->table) {
		/* We update the highest file format in the system table
		space, if this table has higher file format setting. */

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		trx_sys_file_format_max_upgrade(
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			(const char**) &innobase_file_format_max,
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			dict_table_get_format(prebuilt->table));
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	}

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	/* Only if the table has an AUTOINC column. */
	if (prebuilt->table != NULL && table->found_next_number_field != NULL) {
		dict_table_autoinc_lock(prebuilt->table);

		/* Since a table can already be "open" in InnoDB's internal
		data dictionary, we only init the autoinc counter once, the
		first time the table is loaded. We can safely reuse the
		autoinc value from a previous MySQL open. */
		if (dict_table_autoinc_read(prebuilt->table) == 0) {

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			innobase_initialize_autoinc();
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		}

		dict_table_autoinc_unlock(prebuilt->table);
	}

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	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);

3918
	DBUG_RETURN(0);
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}

3921
UNIV_INTERN
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uint
ha_innobase::max_supported_key_part_length() const
{
	return(DICT_MAX_INDEX_COL_LEN - 1);
}

3928
/******************************************************************//**
3929 3930
Closes a handle to an InnoDB table.
@return	0 */
3931
UNIV_INTERN
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int
ha_innobase::close(void)
/*====================*/
{
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	THD*	thd;

3938
	DBUG_ENTER("ha_innobase::close");
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3940
	thd = ha_thd();
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	if (thd != NULL) {
		innobase_release_temporary_latches(ht, thd);
	}

3945
	row_prebuilt_free(prebuilt, FALSE);
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3947
	my_free(upd_buff);
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	free_share(share);
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	/* Tell InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

3955
	DBUG_RETURN(0);
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}

/* The following accessor functions should really be inside MySQL code! */

3960
/**************************************************************//**
3961 3962
Gets field offset for a field in a table.
@return	offset */
3963
static inline
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uint
get_field_offset(
/*=============*/
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	TABLE*	table,	/*!< in: MySQL table object */
	Field*	field)	/*!< in: MySQL field object */
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{
3970
	return((uint) (field->ptr - table->record[0]));
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}

3973
/**************************************************************//**
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Checks if a field in a record is SQL NULL. Uses the record format
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information in table to track the null bit in record.
@return	1 if NULL, 0 otherwise */
3977
static inline
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uint
field_in_record_is_null(
/*====================*/
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	TABLE*	table,	/*!< in: MySQL table object */
	Field*	field,	/*!< in: MySQL field object */
	char*	record)	/*!< in: a row in MySQL format */
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{
	int	null_offset;

	if (!field->null_ptr) {

		return(0);
	}

	null_offset = (uint) ((char*) field->null_ptr
					- (char*) table->record[0]);

	if (record[null_offset] & field->null_bit) {

		return(1);
	}

	return(0);
}

4003
/**************************************************************//**
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Sets a field in a record to SQL NULL. Uses the record format
information in table to track the null bit in record. */
4006
static inline
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void
set_field_in_record_to_null(
/*========================*/
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	TABLE*	table,	/*!< in: MySQL table object */
	Field*	field,	/*!< in: MySQL field object */
	char*	record)	/*!< in: a row in MySQL format */
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{
	int	null_offset;

	null_offset = (uint) ((char*) field->null_ptr
					- (char*) table->record[0]);

	record[null_offset] = record[null_offset] | field->null_bit;
}

4022
/*************************************************************//**
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InnoDB uses this function to compare two data fields for which the data type
is such that we must use MySQL code to compare them. NOTE that the prototype
of this function is in rem0cmp.c in InnoDB source code! If you change this
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function, remember to update the prototype there!
@return	1, 0, -1, if a is greater, equal, less than b, respectively */
4028
extern "C" UNIV_INTERN
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int
innobase_mysql_cmp(
/*===============*/
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	int		mysql_type,	/*!< in: MySQL type */
	uint		charset_number,	/*!< in: number of the charset */
	const unsigned char* a,		/*!< in: data field */
	unsigned int	a_length,	/*!< in: data field length,
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					not UNIV_SQL_NULL */
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	const unsigned char* b,		/*!< in: data field */
	unsigned int	b_length)	/*!< in: data field length,
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					not UNIV_SQL_NULL */
{
	CHARSET_INFO*		charset;
	enum_field_types	mysql_tp;
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	int			ret;
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	DBUG_ASSERT(a_length != UNIV_SQL_NULL);
	DBUG_ASSERT(b_length != UNIV_SQL_NULL);

	mysql_tp = (enum_field_types) mysql_type;

	switch (mysql_tp) {

4052
	case MYSQL_TYPE_BIT:
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	case MYSQL_TYPE_STRING:
	case MYSQL_TYPE_VAR_STRING:
4055 4056 4057 4058
	case MYSQL_TYPE_TINY_BLOB:
	case MYSQL_TYPE_MEDIUM_BLOB:
	case MYSQL_TYPE_BLOB:
	case MYSQL_TYPE_LONG_BLOB:
4059
	case MYSQL_TYPE_VARCHAR:
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		/* Use the charset number to pick the right charset struct for
		the comparison. Since the MySQL function get_charset may be
		slow before Bar removes the mutex operation there, we first
		look at 2 common charsets directly. */

		if (charset_number == default_charset_info->number) {
			charset = default_charset_info;
		} else if (charset_number == my_charset_latin1.number) {
			charset = &my_charset_latin1;
		} else {
			charset = get_charset(charset_number, MYF(MY_WME));

			if (charset == NULL) {
			  sql_print_error("InnoDB needs charset %lu for doing "
					  "a comparison, but MySQL cannot "
					  "find that charset.",
					  (ulong) charset_number);
				ut_a(0);
			}
		}

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		/* Starting from 4.1.3, we use strnncollsp() in comparisons of
		non-latin1_swedish_ci strings. NOTE that the collation order
		changes then: 'b\0\0...' is ordered BEFORE 'b  ...'. Users
		having indexes on such data need to rebuild their tables! */
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		ret = charset->coll->strnncollsp(charset,
				  a, a_length,
						 b, b_length, 0);
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		if (ret < 0) {
4090
			return(-1);
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		} else if (ret > 0) {
4092
			return(1);
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		} else {
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			return(0);
		}
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	default:
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		ut_error;
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	}

	return(0);
}

4103
/**************************************************************//**
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Converts a MySQL type to an InnoDB type. Note that this function returns
the 'mtype' of InnoDB. InnoDB differentiates between MySQL's old <= 4.1
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VARCHAR and the new true VARCHAR in >= 5.0.3 by the 'prtype'.
@return	DATA_BINARY, DATA_VARCHAR, ... */
4108
extern "C" UNIV_INTERN
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ulint
get_innobase_type_from_mysql_type(
/*==============================*/
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	ulint*		unsigned_flag,	/*!< out: DATA_UNSIGNED if an
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					'unsigned type';
					at least ENUM and SET,
					and unsigned integer
					types are 'unsigned types' */
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	const void*	f)		/*!< in: MySQL Field */
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{
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	const class Field* field = reinterpret_cast<const class Field*>(f);

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	/* The following asserts try to check that the MySQL type code fits in
	8 bits: this is used in ibuf and also when DATA_NOT_NULL is ORed to
	the type */

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	DBUG_ASSERT((ulint)MYSQL_TYPE_STRING < 256);
	DBUG_ASSERT((ulint)MYSQL_TYPE_VAR_STRING < 256);
	DBUG_ASSERT((ulint)MYSQL_TYPE_DOUBLE < 256);
	DBUG_ASSERT((ulint)MYSQL_TYPE_FLOAT < 256);
	DBUG_ASSERT((ulint)MYSQL_TYPE_DECIMAL < 256);
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	if (field->flags & UNSIGNED_FLAG) {

		*unsigned_flag = DATA_UNSIGNED;
	} else {
		*unsigned_flag = 0;
	}

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	if (field->real_type() == MYSQL_TYPE_ENUM
		|| field->real_type() == MYSQL_TYPE_SET) {
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		/* MySQL has field->type() a string type for these, but the
		data is actually internally stored as an unsigned integer
		code! */

		*unsigned_flag = DATA_UNSIGNED; /* MySQL has its own unsigned
						flag set to zero, even though
						internally this is an unsigned
						integer type */
		return(DATA_INT);
	}

	switch (field->type()) {
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		/* NOTE that we only allow string types in DATA_MYSQL and
		DATA_VARMYSQL */
	case MYSQL_TYPE_VAR_STRING: /* old <= 4.1 VARCHAR */
	case MYSQL_TYPE_VARCHAR:    /* new >= 5.0.3 true VARCHAR */
		if (field->binary()) {
			return(DATA_BINARY);
		} else if (strcmp(
				   field->charset()->name,
				   "latin1_swedish_ci") == 0) {
			return(DATA_VARCHAR);
		} else {
			return(DATA_VARMYSQL);
		}
	case MYSQL_TYPE_BIT:
	case MYSQL_TYPE_STRING: if (field->binary()) {

			return(DATA_FIXBINARY);
		} else if (strcmp(
				   field->charset()->name,
				   "latin1_swedish_ci") == 0) {
			return(DATA_CHAR);
		} else {
			return(DATA_MYSQL);
		}
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	case MYSQL_TYPE_NEWDECIMAL:
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		return(DATA_FIXBINARY);
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	case MYSQL_TYPE_LONG:
	case MYSQL_TYPE_LONGLONG:
	case MYSQL_TYPE_TINY:
	case MYSQL_TYPE_SHORT:
	case MYSQL_TYPE_INT24:
	case MYSQL_TYPE_DATE:
	case MYSQL_TYPE_DATETIME:
	case MYSQL_TYPE_YEAR:
	case MYSQL_TYPE_NEWDATE:
	case MYSQL_TYPE_TIME:
	case MYSQL_TYPE_TIMESTAMP:
4190
		return(DATA_INT);
4191
	case MYSQL_TYPE_FLOAT:
4192
		return(DATA_FLOAT);
4193
	case MYSQL_TYPE_DOUBLE:
4194
		return(DATA_DOUBLE);
4195
	case MYSQL_TYPE_DECIMAL:
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		return(DATA_DECIMAL);
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	case MYSQL_TYPE_GEOMETRY:
	case MYSQL_TYPE_TINY_BLOB:
	case MYSQL_TYPE_MEDIUM_BLOB:
	case MYSQL_TYPE_BLOB:
	case MYSQL_TYPE_LONG_BLOB:
4202
		return(DATA_BLOB);
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	case MYSQL_TYPE_NULL:
		/* MySQL currently accepts "NULL" datatype, but will
		reject such datatype in the next release. We will cope
		with it and not trigger assertion failure in 5.1 */
		break;
4208
	default:
4209
		ut_error;
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	}

	return(0);
}

4215
/*******************************************************************//**
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Writes an unsigned integer value < 64k to 2 bytes, in the little-endian
storage format. */
4218
static inline
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void
innobase_write_to_2_little_endian(
/*==============================*/
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	byte*	buf,	/*!< in: where to store */
	ulint	val)	/*!< in: value to write, must be < 64k */
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{
	ut_a(val < 256 * 256);

	buf[0] = (byte)(val & 0xFF);
	buf[1] = (byte)(val / 256);
}

4231
/*******************************************************************//**
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Reads an unsigned integer value < 64k from 2 bytes, in the little-endian
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storage format.
@return	value */
4235
static inline
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uint
innobase_read_from_2_little_endian(
/*===============================*/
4239
	const uchar*	buf)	/*!< in: from where to read */
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{
	return (uint) ((ulint)(buf[0]) + 256 * ((ulint)(buf[1])));
}

4244
/*******************************************************************//**
4245 4246
Stores a key value for a row to a buffer.
@return	key value length as stored in buff */
4247
UNIV_INTERN
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uint
ha_innobase::store_key_val_for_row(
/*===============================*/
4251 4252
	uint		keynr,	/*!< in: key number */
	char*		buff,	/*!< in/out: buffer for the key value (in MySQL
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				format) */
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	uint		buff_len,/*!< in: buffer length */
	const uchar*	record)/*!< in: row in MySQL format */
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{
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	KEY*		key_info	= table->key_info + keynr;
	KEY_PART_INFO*	key_part	= key_info->key_part;
	KEY_PART_INFO*	end		= key_part + key_info->key_parts;
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	char*		buff_start	= buff;
	enum_field_types mysql_type;
	Field*		field;
	ibool		is_null;

4265
	DBUG_ENTER("store_key_val_for_row");
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	/* The format for storing a key field in MySQL is the following:

	1. If the column can be NULL, then in the first byte we put 1 if the
	field value is NULL, 0 otherwise.

	2. If the column is of a BLOB type (it must be a column prefix field
	in this case), then we put the length of the data in the field to the
	next 2 bytes, in the little-endian format. If the field is SQL NULL,
	then these 2 bytes are set to 0. Note that the length of data in the
	field is <= column prefix length.

	3. In a column prefix field, prefix_len next bytes are reserved for
	data. In a normal field the max field length next bytes are reserved
	for data. For a VARCHAR(n) the max field length is n. If the stored
	value is the SQL NULL then these data bytes are set to 0.

	4. We always use a 2 byte length for a true >= 5.0.3 VARCHAR. Note that
	in the MySQL row format, the length is stored in 1 or 2 bytes,
	depending on the maximum allowed length. But in the MySQL key value
	format, the length always takes 2 bytes.

	We have to zero-fill the buffer so that MySQL is able to use a
	simple memcmp to compare two key values to determine if they are
	equal. MySQL does this to compare contents of two 'ref' values. */

	bzero(buff, buff_len);

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	for (; key_part != end; key_part++) {
		is_null = FALSE;
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4297 4298
		if (key_part->null_bit) {
			if (record[key_part->null_offset]
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						& key_part->null_bit) {
				*buff = 1;
				is_null = TRUE;
4302
			} else {
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				*buff = 0;
			}
			buff++;
4306
		}
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		field = key_part->field;
		mysql_type = field->type();

		if (mysql_type == MYSQL_TYPE_VARCHAR) {
						/* >= 5.0.3 true VARCHAR */
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			ulint		lenlen;
			ulint		len;
			const byte*	data;
			ulint		key_len;
			ulint		true_len;
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			CHARSET_INFO*	cs;
4319
			int		error=0;
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			key_len = key_part->length;

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			if (is_null) {
4324
				buff += key_len + 2;
4325

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				continue;
			}
4328
			cs = field->charset();
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			lenlen = (ulint)
				(((Field_varstring*)field)->length_bytes);

4333
			data = row_mysql_read_true_varchar(&len,
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				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
				lenlen);

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			true_len = len;

			/* For multi byte character sets we need to calculate
			the true length of the key */

			if (len > 0 && cs->mbmaxlen > 1) {
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) data,
						(const char *) data + len,
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                                                (uint) (key_len /
                                                        cs->mbmaxlen),
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						&error);
			}

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			/* In a column prefix index, we may need to truncate
			the stored value: */

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			if (true_len > key_len) {
				true_len = key_len;
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			}

			/* The length in a key value is always stored in 2
			bytes */

4362
			row_mysql_store_true_var_len((byte*)buff, true_len, 2);
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			buff += 2;

4365
			memcpy(buff, data, true_len);
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			/* Note that we always reserve the maximum possible
			length of the true VARCHAR in the key value, though
			only len first bytes after the 2 length bytes contain
			actual data. The rest of the space was reset to zero
			in the bzero() call above. */

4373
			buff += key_len;
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		} else if (mysql_type == MYSQL_TYPE_TINY_BLOB
			|| mysql_type == MYSQL_TYPE_MEDIUM_BLOB
			|| mysql_type == MYSQL_TYPE_BLOB
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			|| mysql_type == MYSQL_TYPE_LONG_BLOB
			/* MYSQL_TYPE_GEOMETRY data is treated
			as BLOB data in innodb. */
			|| mysql_type == MYSQL_TYPE_GEOMETRY) {
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			CHARSET_INFO*	cs;
			ulint		key_len;
4385
			ulint		true_len;
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			int		error=0;
4387
			ulint		blob_len;
4388
			const byte*	blob_data;
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			ut_a(key_part->key_part_flag & HA_PART_KEY_SEG);

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			key_len = key_part->length;

4394
			if (is_null) {
4395
				buff += key_len + 2;
4396

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				continue;
			}
4399

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			cs = field->charset();

4402
			blob_data = row_mysql_read_blob_ref(&blob_len,
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				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
					(ulint) field->pack_length());

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			true_len = blob_len;

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			ut_a(get_field_offset(table, field)
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				== key_part->offset);
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			/* For multi byte character sets we need to calculate
			the true length of the key */
4414

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			if (blob_len > 0 && cs->mbmaxlen > 1) {
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) blob_data,
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						(const char *) blob_data
4419
							+ blob_len,
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                                                (uint) (key_len /
                                                        cs->mbmaxlen),
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						&error);
			}

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			/* All indexes on BLOB and TEXT are column prefix
			indexes, and we may need to truncate the data to be
			stored in the key value: */

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			if (true_len > key_len) {
				true_len = key_len;
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			}

			/* MySQL reserves 2 bytes for the length and the
			storage of the number is little-endian */

			innobase_write_to_2_little_endian(
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					(byte*)buff, true_len);
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			buff += 2;

4440
			memcpy(buff, blob_data, true_len);
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			/* Note that we always reserve the maximum possible
			length of the BLOB prefix in the key value. */

4445
			buff += key_len;
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		} else {
			/* Here we handle all other data types except the
			true VARCHAR, BLOB and TEXT. Note that the column
			value we store may be also in a column prefix
			index. */

			CHARSET_INFO*		cs;
4453 4454
			ulint			true_len;
			ulint			key_len;
4455
			const uchar*		src_start;
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			int			error=0;
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			enum_field_types	real_type;

			key_len = key_part->length;
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4460

4461
			if (is_null) {
4462
				 buff += key_len;
4463

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				 continue;
			}

			src_start = record + key_part->offset;
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			real_type = field->real_type();
			true_len = key_len;
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			/* Character set for the field is defined only
			to fields whose type is string and real field
			type is not enum or set. For these fields check
			if character set is multi byte. */

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			if (real_type != MYSQL_TYPE_ENUM
				&& real_type != MYSQL_TYPE_SET
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				&& ( mysql_type == MYSQL_TYPE_VAR_STRING
					|| mysql_type == MYSQL_TYPE_STRING)) {

				cs = field->charset();

4483
				/* For multi byte character sets we need to
4484 4485 4486 4487
				calculate the true length of the key */

				if (key_len > 0 && cs->mbmaxlen > 1) {

4488
					true_len = (ulint)
4489 4490
						cs->cset->well_formed_len(cs,
							(const char *)src_start,
4491
							(const char *)src_start
4492
								+ key_len,
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                                                        (uint) (key_len /
                                                                cs->mbmaxlen),
4495 4496
							&error);
				}
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			}

4499 4500
			memcpy(buff, src_start, true_len);
			buff += true_len;
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4501

4502
			/* Pad the unused space with spaces. */
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4503

4504
			if (true_len < key_len) {
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				ulint	pad_len = key_len - true_len;
				ut_a(!(pad_len % cs->mbminlen));

				cs->cset->fill(cs, buff, pad_len,
					       0x20 /* space */);
4510
				buff += pad_len;
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			}
		}
4513
	}
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	ut_a(buff <= buff_start + buff_len);

	DBUG_RETURN((uint)(buff - buff_start));
}

4520
/**************************************************************//**
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Builds a 'template' to the prebuilt struct. The template is used in fast
retrieval of just those column values MySQL needs in its processing. */
4523
static
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4524
void
4525
build_template(
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4526
/*===========*/
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	row_prebuilt_t*	prebuilt,	/*!< in/out: prebuilt struct */
	THD*		thd,		/*!< in: current user thread, used
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					only if templ_type is
					ROW_MYSQL_REC_FIELDS */
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	TABLE*		table,		/*!< in: MySQL table */
	uint		templ_type)	/*!< in: ROW_MYSQL_WHOLE_ROW or
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					ROW_MYSQL_REC_FIELDS */
{
	dict_index_t*	index;
	dict_index_t*	clust_index;
	mysql_row_templ_t* templ;
	Field*		field;
	ulint		n_fields;
	ulint		n_requested_fields	= 0;
	ibool		fetch_all_in_key	= FALSE;
	ibool		fetch_primary_key_cols	= FALSE;
	ulint		i;
	/* byte offset of the end of last requested column */
	ulint		mysql_prefix_len	= 0;

	if (prebuilt->select_lock_type == LOCK_X) {
		/* We always retrieve the whole clustered index record if we
		use exclusive row level locks, for example, if the read is
		done in an UPDATE statement. */

4552
		templ_type = ROW_MYSQL_WHOLE_ROW;
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	}

	if (templ_type == ROW_MYSQL_REC_FIELDS) {
4556 4557
		if (prebuilt->hint_need_to_fetch_extra_cols
			== ROW_RETRIEVE_ALL_COLS) {
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4558

4559 4560
			/* We know we must at least fetch all columns in the
			key, or all columns in the table */
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4561

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			if (prebuilt->read_just_key) {
				/* MySQL has instructed us that it is enough
				to fetch the columns in the key; looks like
				MySQL can set this flag also when there is
				only a prefix of the column in the key: in
				that case we retrieve the whole column from
				the clustered index */
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4569

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				fetch_all_in_key = TRUE;
			} else {
				templ_type = ROW_MYSQL_WHOLE_ROW;
			}
		} else if (prebuilt->hint_need_to_fetch_extra_cols
			== ROW_RETRIEVE_PRIMARY_KEY) {
			/* We must at least fetch all primary key cols. Note
			   that if the clustered index was internally generated
			   by InnoDB on the row id (no primary key was
			   defined), then row_search_for_mysql() will always
			   retrieve the row id to a special buffer in the
			   prebuilt struct. */

			fetch_primary_key_cols = TRUE;
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		}
	}

4587
	clust_index = dict_table_get_first_index(prebuilt->table);
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	if (templ_type == ROW_MYSQL_REC_FIELDS) {
		index = prebuilt->index;
	} else {
		index = clust_index;
	}

	if (index == clust_index) {
		prebuilt->need_to_access_clustered = TRUE;
	} else {
		prebuilt->need_to_access_clustered = FALSE;
		/* Below we check column by column if we need to access
		the clustered index */
	}

	n_fields = (ulint)table->s->fields; /* number of columns */

	if (!prebuilt->mysql_template) {
		prebuilt->mysql_template = (mysql_row_templ_t*)
4607
			mem_alloc(n_fields * sizeof(mysql_row_templ_t));
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	}

	prebuilt->template_type = templ_type;
	prebuilt->null_bitmap_len = table->s->null_bytes;

	prebuilt->templ_contains_blob = FALSE;

	/* Note that in InnoDB, i is the column number. MySQL calls columns
	'fields'. */
	for (i = 0; i < n_fields; i++) {
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		const dict_col_t* col = &index->table->cols[i];
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		templ = prebuilt->mysql_template + n_requested_fields;
		field = table->field[i];

		if (UNIV_LIKELY(templ_type == ROW_MYSQL_REC_FIELDS)) {
			/* Decide which columns we should fetch
			and which we can skip. */
			register const ibool	index_contains_field =
				dict_index_contains_col_or_prefix(index, i);

			if (!index_contains_field && prebuilt->read_just_key) {
				/* If this is a 'key read', we do not need
				columns that are not in the key */

				goto skip_field;
			}

			if (index_contains_field && fetch_all_in_key) {
				/* This field is needed in the query */

				goto include_field;
			}

4641 4642
			if (bitmap_is_set(table->read_set, i) ||
			    bitmap_is_set(table->write_set, i)) {
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				/* This field is needed in the query */

				goto include_field;
			}

			if (fetch_primary_key_cols
4649 4650
				&& dict_table_col_in_clustered_key(
					index->table, i)) {
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				/* This field is needed in the query */

				goto include_field;
			}

			/* This field is not needed in the query, skip it */

			goto skip_field;
		}
include_field:
		n_requested_fields++;

		templ->col_no = i;
4664 4665
		templ->clust_rec_field_no = dict_col_get_clust_pos(
			col, clust_index);
4666
		ut_ad(templ->clust_rec_field_no != ULINT_UNDEFINED);
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4667 4668

		if (index == clust_index) {
4669
			templ->rec_field_no = templ->clust_rec_field_no;
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		} else {
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
4673 4674 4675
			if (templ->rec_field_no == ULINT_UNDEFINED) {
				prebuilt->need_to_access_clustered = TRUE;
			}
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		}

		if (field->null_ptr) {
			templ->mysql_null_byte_offset =
				(ulint) ((char*) field->null_ptr
					- (char*) table->record[0]);

			templ->mysql_null_bit_mask = (ulint) field->null_bit;
		} else {
			templ->mysql_null_bit_mask = 0;
		}

		templ->mysql_col_offset = (ulint)
					get_field_offset(table, field);

		templ->mysql_col_len = (ulint) field->pack_length();
		if (mysql_prefix_len < templ->mysql_col_offset
				+ templ->mysql_col_len) {
			mysql_prefix_len = templ->mysql_col_offset
				+ templ->mysql_col_len;
		}
4697
		templ->type = col->mtype;
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		templ->mysql_type = (ulint)field->type();

		if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR) {
			templ->mysql_length_bytes = (ulint)
4702
				(((Field_varstring*)field)->length_bytes);
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4703
		}
4704

4705 4706 4707 4708
		templ->charset = dtype_get_charset_coll(col->prtype);
		templ->mbminlen = dict_col_get_mbminlen(col);
		templ->mbmaxlen = dict_col_get_mbmaxlen(col);
		templ->is_unsigned = col->prtype & DATA_UNSIGNED;
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		if (templ->type == DATA_BLOB) {
			prebuilt->templ_contains_blob = TRUE;
		}
skip_field:
		;
	}

	prebuilt->n_template = n_requested_fields;
	prebuilt->mysql_prefix_len = mysql_prefix_len;

	if (index != clust_index && prebuilt->need_to_access_clustered) {
		/* Change rec_field_no's to correspond to the clustered index
		record */
		for (i = 0; i < n_requested_fields; i++) {
			templ = prebuilt->mysql_template + i;

4725
			templ->rec_field_no = templ->clust_rec_field_no;
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		}
	}
}

4730
/********************************************************************//**
4731 4732 4733 4734
This special handling is really to overcome the limitations of MySQL's
binlogging. We need to eliminate the non-determinism that will arise in
INSERT ... SELECT type of statements, since MySQL binlog only stores the
min value of the autoinc interval. Once that is fixed we can get rid of
4735 4736
the special lock handling.
@return	DB_SUCCESS if all OK else error code */
4737
UNIV_INTERN
4738 4739
ulint
ha_innobase::innobase_lock_autoinc(void)
4740 4741 4742 4743
/*====================================*/
{
	ulint		error = DB_SUCCESS;

4744 4745 4746
	switch (innobase_autoinc_lock_mode) {
	case AUTOINC_NO_LOCKING:
		/* Acquire only the AUTOINC mutex. */
4747
		dict_table_autoinc_lock(prebuilt->table);
4748
		break;
4749

4750 4751 4752 4753 4754
	case AUTOINC_NEW_STYLE_LOCKING:
		/* For simple (single/multi) row INSERTs, we fallback to the
		old style only if another transaction has already acquired
		the AUTOINC lock on behalf of a LOAD FILE or INSERT ... SELECT
		etc. type of statement. */
4755 4756
		if (thd_sql_command(user_thd) == SQLCOM_INSERT
		    || thd_sql_command(user_thd) == SQLCOM_REPLACE) {
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			dict_table_t*	table = prebuilt->table;

			/* Acquire the AUTOINC mutex. */
			dict_table_autoinc_lock(table);

			/* We need to check that another transaction isn't
			already holding the AUTOINC lock on the table. */
			if (table->n_waiting_or_granted_auto_inc_locks) {
				/* Release the mutex to avoid deadlocks. */
				dict_table_autoinc_unlock(table);
			} else {
				break;
			}
4770
		}
4771 4772 4773
		/* Fall through to old style locking. */

	case AUTOINC_OLD_STYLE_LOCKING:
4774 4775 4776
		error = row_lock_table_autoinc_for_mysql(prebuilt);

		if (error == DB_SUCCESS) {
4777 4778

			/* Acquire the AUTOINC mutex. */
4779 4780
			dict_table_autoinc_lock(prebuilt->table);
		}
4781 4782 4783 4784
		break;

	default:
		ut_error;
4785 4786 4787 4788 4789
	}

	return(ulong(error));
}

4790
/********************************************************************//**
4791 4792
Reset the autoinc value in the table.
@return	DB_SUCCESS if all went well else error code */
4793
UNIV_INTERN
4794
ulint
4795 4796
ha_innobase::innobase_reset_autoinc(
/*================================*/
4797
	ulonglong	autoinc)	/*!< in: value to store */
4798 4799 4800
{
	ulint		error;

4801
	error = innobase_lock_autoinc();
4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812

	if (error == DB_SUCCESS) {

		dict_table_autoinc_initialize(prebuilt->table, autoinc);

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

4813
/********************************************************************//**
4814
Store the autoinc value in the table. The autoinc value is only set if
4815
it's greater than the existing autoinc value in the table.
4816
@return	DB_SUCCESS if all went well else error code */
4817
UNIV_INTERN
4818
ulint
4819 4820
ha_innobase::innobase_set_max_autoinc(
/*==================================*/
4821
	ulonglong	auto_inc)	/*!< in: value to store */
4822 4823 4824
{
	ulint		error;

4825
	error = innobase_lock_autoinc();
4826 4827 4828

	if (error == DB_SUCCESS) {

4829
		dict_table_autoinc_update_if_greater(prebuilt->table, auto_inc);
4830 4831 4832 4833 4834 4835 4836

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

4837
/********************************************************************//**
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4838
Stores a row in an InnoDB database, to the table specified in this
4839 4840
handle.
@return	error code */
4841
UNIV_INTERN
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4842 4843 4844
int
ha_innobase::write_row(
/*===================*/
4845
	uchar*	record)	/*!< in: a row in MySQL format */
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4846
{
4847 4848
	ulint		error = 0;
        int             error_result= 0;
4849
	ibool		auto_inc_used= FALSE;
4850 4851
	ulint		sql_command;
	trx_t*		trx = thd_to_trx(user_thd);
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4852

4853
	DBUG_ENTER("ha_innobase::write_row");
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4854

4855
	if (prebuilt->trx != trx) {
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	  sql_print_error("The transaction object for the table handle is at "
			  "%p, but for the current thread it is at %p",
4858
			  (const void*) prebuilt->trx, (const void*) trx);
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4859 4860 4861 4862

		fputs("InnoDB: Dump of 200 bytes around prebuilt: ", stderr);
		ut_print_buf(stderr, ((const byte*)prebuilt) - 100, 200);
		fputs("\n"
4863
			"InnoDB: Dump of 200 bytes around ha_data: ",
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4864
			stderr);
4865
		ut_print_buf(stderr, ((const byte*) trx) - 100, 200);
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		putc('\n', stderr);
		ut_error;
	}

4870
	ha_statistic_increment(&SSV::ha_write_count);
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4871

4872 4873
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
		table->timestamp_field->set_time();
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4874

4875 4876 4877 4878 4879 4880 4881
	sql_command = thd_sql_command(user_thd);

	if ((sql_command == SQLCOM_ALTER_TABLE
	     || sql_command == SQLCOM_OPTIMIZE
	     || sql_command == SQLCOM_CREATE_INDEX
	     || sql_command == SQLCOM_DROP_INDEX)
	    && num_write_row >= 10000) {
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		/* ALTER TABLE is COMMITted at every 10000 copied rows.
		The IX table lock for the original table has to be re-issued.
		As this method will be called on a temporary table where the
		contents of the original table is being copied to, it is
		a bit tricky to determine the source table.  The cursor
		position in the source table need not be adjusted after the
		intermediate COMMIT, since writes by other transactions are
		being blocked by a MySQL table lock TL_WRITE_ALLOW_READ. */

		dict_table_t*	src_table;
4892
		enum lock_mode	mode;
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		num_write_row = 0;

		/* Commit the transaction.  This will release the table
		locks, so they have to be acquired again. */

		/* Altering an InnoDB table */
		/* Get the source table. */
		src_table = lock_get_src_table(
				prebuilt->trx, prebuilt->table, &mode);
		if (!src_table) {
no_commit:
			/* Unknown situation: do not commit */
			/*
			ut_print_timestamp(stderr);
			fprintf(stderr,
4909
				"  InnoDB: ALTER TABLE is holding lock"
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				" on %lu tables!\n",
				prebuilt->trx->mysql_n_tables_locked);
			*/
			;
		} else if (src_table == prebuilt->table) {
			/* Source table is not in InnoDB format:
			no need to re-acquire locks on it. */

			/* Altering to InnoDB format */
4919
			innobase_commit(ht, user_thd, 1);
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			/* Note that this transaction is still active. */
4921
			trx_register_for_2pc(prebuilt->trx);
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			/* We will need an IX lock on the destination table. */
4923
			prebuilt->sql_stat_start = TRUE;
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		} else {
			/* Ensure that there are no other table locks than
			LOCK_IX and LOCK_AUTO_INC on the destination table. */

			if (!lock_is_table_exclusive(prebuilt->table,
							prebuilt->trx)) {
				goto no_commit;
			}

			/* Commit the transaction.  This will release the table
			locks, so they have to be acquired again. */
4935
			innobase_commit(ht, user_thd, 1);
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			/* Note that this transaction is still active. */
4937
			trx_register_for_2pc(prebuilt->trx);
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			/* Re-acquire the table lock on the source table. */
			row_lock_table_for_mysql(prebuilt, src_table, mode);
			/* We will need an IX lock on the destination table. */
4941
			prebuilt->sql_stat_start = TRUE;
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		}
	}

	num_write_row++;

4947
	/* This is the case where the table has an auto-increment column */
4948
	if (table->next_number_field && record == table->record[0]) {
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4949

4950 4951 4952 4953
		/* Reset the error code before calling
		innobase_get_auto_increment(). */
		prebuilt->autoinc_error = DB_SUCCESS;

4954
		if ((error = update_auto_increment())) {
4955 4956
			/* We don't want to mask autoinc overflow errors. */

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			/* Handle the case where the AUTOINC sub-system
			failed during initialization. */
			if (prebuilt->autoinc_error == DB_UNSUPPORTED) {
				error_result = ER_AUTOINC_READ_FAILED;
				/* Set the error message to report too. */
				my_error(ER_AUTOINC_READ_FAILED, MYF(0));
				goto func_exit;
			} else if (prebuilt->autoinc_error != DB_SUCCESS) {
				error = (int) prebuilt->autoinc_error;
4966 4967 4968 4969
				goto report_error;
			}

			/* MySQL errors are passed straight back. */
4970
			error_result = (int) error;
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			goto func_exit;
		}

4974
		auto_inc_used = TRUE;
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	}

	if (prebuilt->mysql_template == NULL
4978 4979
	    || prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) {

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		/* Build the template used in converting quickly between
		the two database formats */

		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
	}

	innodb_srv_conc_enter_innodb(prebuilt->trx);

	error = row_insert_for_mysql((byte*) record, prebuilt);

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	/* Handle duplicate key errors */
	if (auto_inc_used) {
4992
		ulint		err;
4993
		ulonglong	auto_inc;
4994
		ulonglong	col_max_value;
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		/* Note the number of rows processed for this statement, used
		by get_auto_increment() to determine the number of AUTO-INC
		values to reserve. This is only useful for a mult-value INSERT
		and is a statement level counter.*/
		if (trx->n_autoinc_rows > 0) {
			--trx->n_autoinc_rows;
		}
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		/* We need the upper limit of the col type to check for
		whether we update the table autoinc counter or not. */
		col_max_value = innobase_get_int_col_max_value(
			table->next_number_field);

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		/* Get the value that MySQL attempted to store in the table.*/
5010
		auto_inc = table->next_number_field->val_int();
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		switch (error) {
		case DB_DUPLICATE_KEY:
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			/* A REPLACE command and LOAD DATA INFILE REPLACE
			handle a duplicate key error themselves, but we
			must update the autoinc counter if we are performing
			those statements. */
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			switch (sql_command) {
			case SQLCOM_LOAD:
				if ((trx->duplicates
				    & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))) {
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					goto set_max_autoinc;
				}
				break;
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			case SQLCOM_REPLACE:
			case SQLCOM_INSERT_SELECT:
			case SQLCOM_REPLACE_SELECT:
				goto set_max_autoinc;
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			default:
				break;
			}

			break;

		case DB_SUCCESS:
			/* If the actual value inserted is greater than
			the upper limit of the interval, then we try and
			update the table upper limit. Note: last_value
			will be 0 if get_auto_increment() was not called.*/

5046
			if (auto_inc >= prebuilt->autoinc_last_value) {
5047
set_max_autoinc:
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				/* This should filter out the negative
				values set explicitly by the user. */
				if (auto_inc <= col_max_value) {
					ut_a(prebuilt->autoinc_increment > 0);
5052

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					ulonglong	need;
					ulonglong	offset;
5055

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					offset = prebuilt->autoinc_offset;
					need = prebuilt->autoinc_increment;
5058

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					auto_inc = innobase_next_autoinc(
						auto_inc,
						need, offset, col_max_value);
5062

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					err = innobase_set_max_autoinc(
						auto_inc);
5065

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					if (err != DB_SUCCESS) {
						error = err;
					}
5069
				}
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			}
			break;
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		}
	}
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	innodb_srv_conc_exit_innodb(prebuilt->trx);

5077
report_error:
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	error_result = convert_error_code_to_mysql((int) error,
						   prebuilt->table->flags,
						   user_thd);
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func_exit:
	innobase_active_small();

5085
	DBUG_RETURN(error_result);
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}

5088
/**********************************************************************//**
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Checks which fields have changed in a row and stores information
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of them to an update vector.
@return	error number or 0 */
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static
int
calc_row_difference(
/*================*/
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	upd_t*		uvect,		/*!< in/out: update vector */
	uchar*		old_row,	/*!< in: old row in MySQL format */
	uchar*		new_row,	/*!< in: new row in MySQL format */
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	TABLE*		table,		/*!< in: table in MySQL data
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					dictionary */
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	uchar*		upd_buff,	/*!< in: buffer to use */
	ulint		buff_len,	/*!< in: buffer length */
	row_prebuilt_t*	prebuilt,	/*!< in: InnoDB prebuilt struct */
	THD*		thd)		/*!< in: user thread */
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{
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	uchar*		original_upd_buff = upd_buff;
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	Field*		field;
	enum_field_types field_mysql_type;
	uint		n_fields;
	ulint		o_len;
	ulint		n_len;
	ulint		col_pack_len;
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	const byte*	new_mysql_row_col;
	const byte*	o_ptr;
	const byte*	n_ptr;
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	byte*		buf;
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	upd_field_t*	ufield;
	ulint		col_type;
	ulint		n_changed = 0;
	dfield_t	dfield;
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	dict_index_t*	clust_index;
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	uint		i;

	n_fields = table->s->fields;
5125
	clust_index = dict_table_get_first_index(prebuilt->table);
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	/* We use upd_buff to convert changed fields */
	buf = (byte*) upd_buff;

	for (i = 0; i < n_fields; i++) {
		field = table->field[i];

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		o_ptr = (const byte*) old_row + get_field_offset(table, field);
		n_ptr = (const byte*) new_row + get_field_offset(table, field);
5135

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		/* Use new_mysql_row_col and col_pack_len save the values */

		new_mysql_row_col = n_ptr;
		col_pack_len = field->pack_length();

		o_len = col_pack_len;
		n_len = col_pack_len;

		/* We use o_ptr and n_ptr to dig up the actual data for
5145
		comparison. */
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		field_mysql_type = field->type();
5148

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		col_type = prebuilt->table->cols[i].mtype;
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		switch (col_type) {

		case DATA_BLOB:
			o_ptr = row_mysql_read_blob_ref(&o_len, o_ptr, o_len);
			n_ptr = row_mysql_read_blob_ref(&n_len, n_ptr, n_len);

			break;

		case DATA_VARCHAR:
		case DATA_BINARY:
		case DATA_VARMYSQL:
			if (field_mysql_type == MYSQL_TYPE_VARCHAR) {
				/* This is a >= 5.0.3 type true VARCHAR where
				the real payload data length is stored in
				1 or 2 bytes */
5166

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				o_ptr = row_mysql_read_true_varchar(
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					&o_len, o_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));

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				n_ptr = row_mysql_read_true_varchar(
5173 5174 5175
					&n_len, n_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));
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			}

			break;
		default:
			;
		}

		if (field->null_ptr) {
			if (field_in_record_is_null(table, field,
							(char*) old_row)) {
				o_len = UNIV_SQL_NULL;
			}

			if (field_in_record_is_null(table, field,
							(char*) new_row)) {
				n_len = UNIV_SQL_NULL;
			}
		}

		if (o_len != n_len || (o_len != UNIV_SQL_NULL &&
					0 != memcmp(o_ptr, n_ptr, o_len))) {
			/* The field has changed */

			ufield = uvect->fields + n_changed;
5200

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			/* Let us use a dummy dfield to make the conversion
			from the MySQL column format to the InnoDB format */

5204
			dict_col_copy_type(prebuilt->table->cols + i,
5205
					   dfield_get_type(&dfield));
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			if (n_len != UNIV_SQL_NULL) {
				buf = row_mysql_store_col_in_innobase_format(
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					&dfield,
					(byte*)buf,
					TRUE,
					new_mysql_row_col,
					col_pack_len,
5214
					dict_table_is_comp(prebuilt->table));
5215
				dfield_copy_data(&ufield->new_val, &dfield);
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			} else {
5217
				dfield_set_null(&ufield->new_val);
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			}

			ufield->exp = NULL;
5221
			ufield->orig_len = 0;
5222
			ufield->field_no = dict_col_get_clust_pos(
5223
				&prebuilt->table->cols[i], clust_index);
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			n_changed++;
		}
	}

	uvect->n_fields = n_changed;
	uvect->info_bits = 0;

	ut_a(buf <= (byte*)original_upd_buff + buff_len);

	return(0);
}

5236
/**********************************************************************//**
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Updates a row given as a parameter to a new value. Note that we are given
whole rows, not just the fields which are updated: this incurs some
overhead for CPU when we check which fields are actually updated.
TODO: currently InnoDB does not prevent the 'Halloween problem':
in a searched update a single row can get updated several times
5242 5243
if its index columns are updated!
@return	error number or 0 */
5244
UNIV_INTERN
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int
ha_innobase::update_row(
/*====================*/
5248 5249
	const uchar*	old_row,	/*!< in: old row in MySQL format */
	uchar*		new_row)	/*!< in: new row in MySQL format */
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{
	upd_t*		uvect;
	int		error = 0;
5253
	trx_t*		trx = thd_to_trx(user_thd);
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	DBUG_ENTER("ha_innobase::update_row");

5257
	ut_a(prebuilt->trx == trx);
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5258

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	ha_statistic_increment(&SSV::ha_update_count);

5261 5262
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
		table->timestamp_field->set_time();
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	if (prebuilt->upd_node) {
		uvect = prebuilt->upd_node->update;
	} else {
		uvect = row_get_prebuilt_update_vector(prebuilt);
	}

	/* Build an update vector from the modified fields in the rows
	(uses upd_buff of the handle) */

5273
	calc_row_difference(uvect, (uchar*) old_row, new_row, table,
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			upd_buff, (ulint)upd_and_key_val_buff_len,
			prebuilt, user_thd);

	/* This is not a delete */
	prebuilt->upd_node->is_delete = FALSE;

5280
	ut_a(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);
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5281

5282
	innodb_srv_conc_enter_innodb(trx);
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	error = row_update_for_mysql((byte*) old_row, prebuilt);

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	/* We need to do some special AUTOINC handling for the following case:

	INSERT INTO t (c1,c2) VALUES(x,y) ON DUPLICATE KEY UPDATE ...

	We need to use the AUTOINC counter that was actually used by
	MySQL in the UPDATE statement, which can be different from the
	value used in the INSERT statement.*/

	if (error == DB_SUCCESS
	    && table->next_number_field
	    && new_row == table->record[0]
	    && thd_sql_command(user_thd) == SQLCOM_INSERT
	    && (trx->duplicates & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))
		== TRX_DUP_IGNORE)  {

5301 5302
		ulonglong	auto_inc;
		ulonglong	col_max_value;
5303 5304 5305

		auto_inc = table->next_number_field->val_int();

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		/* We need the upper limit of the col type to check for
		whether we update the table autoinc counter or not. */
		col_max_value = innobase_get_int_col_max_value(
			table->next_number_field);

		if (auto_inc <= col_max_value && auto_inc != 0) {

			ulonglong	need;
			ulonglong	offset;

			offset = prebuilt->autoinc_offset;
			need = prebuilt->autoinc_increment;

			auto_inc = innobase_next_autoinc(
				auto_inc, need, offset, col_max_value);
5321

5322
			error = innobase_set_max_autoinc(auto_inc);
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		}
	}

5326
	innodb_srv_conc_exit_innodb(trx);
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5327

5328 5329
	error = convert_error_code_to_mysql(error,
					    prebuilt->table->flags, user_thd);
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	if (error == 0 /* success */
	    && uvect->n_fields == 0 /* no columns were updated */) {

		/* This is the same as success, but instructs
		MySQL that the row is not really updated and it
		should not increase the count of updated rows.
		This is fix for http://bugs.mysql.com/29157 */
		error = HA_ERR_RECORD_IS_THE_SAME;
	}

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	/* Tell InnoDB server that there might be work for
	utility threads: */

	innobase_active_small();

	DBUG_RETURN(error);
}

5349
/**********************************************************************//**
5350 5351
Deletes a row given as the parameter.
@return	error number or 0 */
5352
UNIV_INTERN
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int
ha_innobase::delete_row(
/*====================*/
5356
	const uchar*	record)	/*!< in: a row in MySQL format */
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5357 5358
{
	int		error = 0;
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	trx_t*		trx = thd_to_trx(user_thd);
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	DBUG_ENTER("ha_innobase::delete_row");

5363
	ut_a(prebuilt->trx == trx);
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5364

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	ha_statistic_increment(&SSV::ha_delete_count);

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	if (!prebuilt->upd_node) {
		row_get_prebuilt_update_vector(prebuilt);
	}

	/* This is a delete */

	prebuilt->upd_node->is_delete = TRUE;

5375
	innodb_srv_conc_enter_innodb(trx);
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	error = row_update_for_mysql((byte*) record, prebuilt);

5379
	innodb_srv_conc_exit_innodb(trx);
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5380

5381 5382
	error = convert_error_code_to_mysql(
		error, prebuilt->table->flags, user_thd);
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	/* Tell the InnoDB server that there might be work for
	utility threads: */

	innobase_active_small();

	DBUG_RETURN(error);
}

5392
/**********************************************************************//**
5393
Removes a new lock set on a row, if it was not read optimistically. This can
5394 5395
be called after a row has been read in the processing of an UPDATE or a DELETE
query, if the option innodb_locks_unsafe_for_binlog is set. */
5396
UNIV_INTERN
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void
ha_innobase::unlock_row(void)
/*=========================*/
{
	DBUG_ENTER("ha_innobase::unlock_row");

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	/* Consistent read does not take any locks, thus there is
	nothing to unlock. */

	if (prebuilt->select_lock_type == LOCK_NONE) {
		DBUG_VOID_RETURN;
	}

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	switch (prebuilt->row_read_type) {
	case ROW_READ_WITH_LOCKS:
5412
		if (!srv_locks_unsafe_for_binlog
5413
		    && prebuilt->trx->isolation_level
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		    > TRX_ISO_READ_COMMITTED) {
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			break;
		}
		/* fall through */
	case ROW_READ_TRY_SEMI_CONSISTENT:
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		row_unlock_for_mysql(prebuilt, FALSE);
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		break;
	case ROW_READ_DID_SEMI_CONSISTENT:
		prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT;
		break;
	}

	DBUG_VOID_RETURN;
}

/* See handler.h and row0mysql.h for docs on this function. */
5430
UNIV_INTERN
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bool
ha_innobase::was_semi_consistent_read(void)
/*=======================================*/
{
	return(prebuilt->row_read_type == ROW_READ_DID_SEMI_CONSISTENT);
}

/* See handler.h and row0mysql.h for docs on this function. */
5439
UNIV_INTERN
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void
ha_innobase::try_semi_consistent_read(bool yes)
/*===========================================*/
{
5444
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
5445

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	/* Row read type is set to semi consistent read if this was
	requested by the MySQL and either innodb_locks_unsafe_for_binlog
	option is used or this session is using READ COMMITTED isolation
	level. */

5451 5452
	if (yes
	    && (srv_locks_unsafe_for_binlog
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		|| prebuilt->trx->isolation_level <= TRX_ISO_READ_COMMITTED)) {
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		prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT;
	} else {
		prebuilt->row_read_type = ROW_READ_WITH_LOCKS;
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	}
}

5460
/******************************************************************//**
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Initializes a handle to use an index.
@return	0 or error number */
5463
UNIV_INTERN
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int
ha_innobase::index_init(
/*====================*/
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	uint	keynr,	/*!< in: key (index) number */
	bool sorted)	/*!< in: 1 if result MUST be sorted according to index */
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{
5470
	DBUG_ENTER("index_init");
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5472
	DBUG_RETURN(change_active_index(keynr));
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}

5475
/******************************************************************//**
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Currently does nothing.
@return	0 */
5478
UNIV_INTERN
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int
ha_innobase::index_end(void)
/*========================*/
{
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	int	error	= 0;
	DBUG_ENTER("index_end");
	active_index=MAX_KEY;
	DBUG_RETURN(error);
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}

5489
/*********************************************************************//**
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Converts a search mode flag understood by MySQL to a flag understood
by InnoDB. */
5492
static inline
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ulint
convert_search_mode_to_innobase(
/*============================*/
	enum ha_rkey_function	find_flag)
{
	switch (find_flag) {
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	case HA_READ_KEY_EXACT:
		/* this does not require the index to be UNIQUE */
		return(PAGE_CUR_GE);
	case HA_READ_KEY_OR_NEXT:
		return(PAGE_CUR_GE);
	case HA_READ_KEY_OR_PREV:
		return(PAGE_CUR_LE);
	case HA_READ_AFTER_KEY:	
		return(PAGE_CUR_G);
	case HA_READ_BEFORE_KEY:
		return(PAGE_CUR_L);
	case HA_READ_PREFIX:
		return(PAGE_CUR_GE);
	case HA_READ_PREFIX_LAST:
		return(PAGE_CUR_LE);
	case HA_READ_PREFIX_LAST_OR_PREV:
		return(PAGE_CUR_LE);
		/* In MySQL-4.0 HA_READ_PREFIX and HA_READ_PREFIX_LAST always
		pass a complete-field prefix of a key value as the search
		tuple. I.e., it is not allowed that the last field would
		just contain n first bytes of the full field value.
		MySQL uses a 'padding' trick to convert LIKE 'abc%'
		type queries so that it can use as a search tuple
		a complete-field-prefix of a key value. Thus, the InnoDB
		search mode PAGE_CUR_LE_OR_EXTENDS is never used.
		TODO: when/if MySQL starts to use also partial-field
		prefixes, we have to deal with stripping of spaces
		and comparison of non-latin1 char type fields in
		innobase_mysql_cmp() to get PAGE_CUR_LE_OR_EXTENDS to
		work correctly. */
	case HA_READ_MBR_CONTAIN:
	case HA_READ_MBR_INTERSECT:
	case HA_READ_MBR_WITHIN:
	case HA_READ_MBR_DISJOINT:
	case HA_READ_MBR_EQUAL:
		return(PAGE_CUR_UNSUPP);
	/* do not use "default:" in order to produce a gcc warning:
	enumeration value '...' not handled in switch
	(if -Wswitch or -Wall is used) */
	}

	my_error(ER_CHECK_NOT_IMPLEMENTED, MYF(0), "this functionality");

	return(PAGE_CUR_UNSUPP);
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}

/*
   BACKGROUND INFO: HOW A SELECT SQL QUERY IS EXECUTED
   ---------------------------------------------------
The following does not cover all the details, but explains how we determine
the start of a new SQL statement, and what is associated with it.

For each table in the database the MySQL interpreter may have several
table handle instances in use, also in a single SQL query. For each table
handle instance there is an InnoDB  'prebuilt' struct which contains most
of the InnoDB data associated with this table handle instance.

  A) if the user has not explicitly set any MySQL table level locks:

  1) MySQL calls ::external_lock to set an 'intention' table level lock on
the table of the handle instance. There we set
prebuilt->sql_stat_start = TRUE. The flag sql_stat_start should be set
true if we are taking this table handle instance to use in a new SQL
statement issued by the user. We also increment trx->n_mysql_tables_in_use.

  2) If prebuilt->sql_stat_start == TRUE we 'pre-compile' the MySQL search
instructions to prebuilt->template of the table handle instance in
::index_read. The template is used to save CPU time in large joins.

  3) In row_search_for_mysql, if prebuilt->sql_stat_start is true, we
allocate a new consistent read view for the trx if it does not yet have one,
or in the case of a locking read, set an InnoDB 'intention' table level
lock on the table.

  4) We do the SELECT. MySQL may repeatedly call ::index_read for the
same table handle instance, if it is a join.

  5) When the SELECT ends, MySQL removes its intention table level locks
in ::external_lock. When trx->n_mysql_tables_in_use drops to zero,
 (a) we execute a COMMIT there if the autocommit is on,
 (b) we also release possible 'SQL statement level resources' InnoDB may
have for this SQL statement. The MySQL interpreter does NOT execute
autocommit for pure read transactions, though it should. That is why the
table handler in that case has to execute the COMMIT in ::external_lock.

  B) If the user has explicitly set MySQL table level locks, then MySQL
does NOT call ::external_lock at the start of the statement. To determine
when we are at the start of a new SQL statement we at the start of
::index_read also compare the query id to the latest query id where the
table handle instance was used. If it has changed, we know we are at the
start of a new SQL statement. Since the query id can theoretically
overwrap, we use this test only as a secondary way of determining the
start of a new SQL statement. */


5594
/**********************************************************************//**
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5595
Positions an index cursor to the index specified in the handle. Fetches the
5596 5597
row if any.
@return	0, HA_ERR_KEY_NOT_FOUND, or error number */
5598
UNIV_INTERN
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int
ha_innobase::index_read(
/*====================*/
5602
	uchar*		buf,		/*!< in/out: buffer for the returned
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5603
					row */
5604
	const uchar*	key_ptr,	/*!< in: key value; if this is NULL
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					we position the cursor at the
					start or end of index; this can
					also contain an InnoDB row id, in
					which case key_len is the InnoDB
					row id length; the key value can
					also be a prefix of a full key value,
					and the last column can be a prefix
					of a full column */
5613 5614
	uint			key_len,/*!< in: key value length */
	enum ha_rkey_function find_flag)/*!< in: search flags from my_base.h */
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{
	ulint		mode;
	dict_index_t*	index;
5618 5619
	ulint		match_mode	= 0;
	int		error;
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	ulint		ret;

5622
	DBUG_ENTER("index_read");
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5623

5624
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
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5625

5626
	ha_statistic_increment(&SSV::ha_read_key_count);
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	index = prebuilt->index;

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	if (UNIV_UNLIKELY(index == NULL)) {
		prebuilt->index_usable = FALSE;
		DBUG_RETURN(HA_ERR_CRASHED);
	}
5634 5635 5636
	if (UNIV_UNLIKELY(!prebuilt->index_usable)) {
		DBUG_RETURN(HA_ERR_TABLE_DEF_CHANGED);
	}
5637

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5638
	/* Note that if the index for which the search template is built is not
5639
	necessarily prebuilt->index, but can also be the clustered index */
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	if (prebuilt->sql_stat_start) {
5642
		build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS);
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	}

	if (key_ptr) {
5646
		/* Convert the search key value to InnoDB format into
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		prebuilt->search_tuple */

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		row_sel_convert_mysql_key_to_innobase(
			prebuilt->search_tuple,
			(byte*) key_val_buff,
			(ulint)upd_and_key_val_buff_len,
			index,
			(byte*) key_ptr,
			(ulint) key_len,
			prebuilt->trx);
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	} else {
		/* We position the cursor to the last or the first entry
		in the index */

5661
		dtuple_set_n_fields(prebuilt->search_tuple, 0);
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	}

	mode = convert_search_mode_to_innobase(find_flag);

	match_mode = 0;

	if (find_flag == HA_READ_KEY_EXACT) {
5669

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		match_mode = ROW_SEL_EXACT;

	} else if (find_flag == HA_READ_PREFIX
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		   || find_flag == HA_READ_PREFIX_LAST) {

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		match_mode = ROW_SEL_EXACT_PREFIX;
	}

	last_match_mode = (uint) match_mode;

5680
	if (mode != PAGE_CUR_UNSUPP) {
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5681

5682
		innodb_srv_conc_enter_innodb(prebuilt->trx);
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5683

5684 5685 5686 5687 5688 5689 5690 5691
		ret = row_search_for_mysql((byte*) buf, mode, prebuilt,
					   match_mode, 0);

		innodb_srv_conc_exit_innodb(prebuilt->trx);
	} else {

		ret = DB_UNSUPPORTED;
	}
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5692

5693 5694
	switch (ret) {
	case DB_SUCCESS:
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		error = 0;
		table->status = 0;
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		break;
	case DB_RECORD_NOT_FOUND:
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		error = HA_ERR_KEY_NOT_FOUND;
		table->status = STATUS_NOT_FOUND;
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		break;
	case DB_END_OF_INDEX:
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		error = HA_ERR_KEY_NOT_FOUND;
		table->status = STATUS_NOT_FOUND;
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		break;
	default:
		error = convert_error_code_to_mysql((int) ret,
						    prebuilt->table->flags,
						    user_thd);
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		table->status = STATUS_NOT_FOUND;
5711
		break;
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	}

	DBUG_RETURN(error);
}

5717
/*******************************************************************//**
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5718
The following functions works like index_read, but it find the last
5719 5720
row with the current key value or prefix.
@return	0, HA_ERR_KEY_NOT_FOUND, or an error code */
5721
UNIV_INTERN
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5722 5723 5724
int
ha_innobase::index_read_last(
/*=========================*/
5725 5726
	uchar*		buf,	/*!< out: fetched row */
	const uchar*	key_ptr,/*!< in: key value, or a prefix of a full
5727
				key value */
5728
	uint		key_len)/*!< in: length of the key val or prefix
5729
				in bytes */
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5730
{
5731
	return(index_read(buf, key_ptr, key_len, HA_READ_PREFIX_LAST));
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}

5734
/********************************************************************//**
5735 5736
Get the index for a handle. Does not change active index.
@return	NULL or index instance. */
5737
UNIV_INTERN
5738 5739 5740
dict_index_t*
ha_innobase::innobase_get_index(
/*============================*/
5741
	uint		keynr)	/*!< in: use this index; MAX_KEY means always
5742 5743
				clustered index, even if it was internally
				generated by InnoDB */
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{
5745
	KEY*		key = 0;
5746 5747 5748
	dict_index_t*	index = 0;

	DBUG_ENTER("innobase_get_index");
5749
	ha_statistic_increment(&SSV::ha_read_key_count);
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5750 5751

	if (keynr != MAX_KEY && table->s->keys > 0) {
5752
		key = table->key_info + keynr;
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5753

5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774
		index = innobase_index_lookup(share, keynr);

		if (index) {
			ut_a(ut_strcmp(index->name, key->name) == 0);
		} else {
			/* Can't find index with keynr in the translation
			table. Only print message if the index translation
			table exists */
			if (share->idx_trans_tbl.index_mapping) {
				sql_print_error("InnoDB could not find "
						"index %s key no %u for "
						"table %s through its "
						"index translation table",
						key ? key->name : "NULL",
						keynr,
						prebuilt->table->name);
			}

			index = dict_table_get_index_on_name(prebuilt->table,
							     key->name);
		}
5775
	} else {
5776
		index = dict_table_get_first_index(prebuilt->table);
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	}

5779
	if (!index) {
5780 5781 5782 5783 5784
		sql_print_error(
			"Innodb could not find key n:o %u with name %s "
			"from dict cache for table %s",
			keynr, key ? key->name : "NULL",
			prebuilt->table->name);
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	}

	DBUG_RETURN(index);
}

5790
/********************************************************************//**
5791 5792
Changes the active index of a handle.
@return	0 or error code */
5793
UNIV_INTERN
5794 5795 5796
int
ha_innobase::change_active_index(
/*=============================*/
5797
	uint	keynr)	/*!< in: use this index; MAX_KEY means always clustered
5798 5799 5800 5801
			index, even if it was internally generated by
			InnoDB */
{
	DBUG_ENTER("change_active_index");
5802

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	ut_ad(user_thd == ha_thd());
	ut_a(prebuilt->trx == thd_to_trx(user_thd));

	active_index = keynr;

	prebuilt->index = innobase_get_index(keynr);

5810 5811 5812
	if (UNIV_UNLIKELY(!prebuilt->index)) {
		sql_print_warning("InnoDB: change_active_index(%u) failed",
				  keynr);
5813
		prebuilt->index_usable = FALSE;
5814
		DBUG_RETURN(1);
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	}

5817 5818 5819 5820
	prebuilt->index_usable = row_merge_is_index_usable(prebuilt->trx,
							   prebuilt->index);

	if (UNIV_UNLIKELY(!prebuilt->index_usable)) {
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		push_warning_printf(user_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				    HA_ERR_TABLE_DEF_CHANGED,
				    "InnoDB: insufficient history for index %u",
				    keynr);
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		/* The caller seems to ignore this.  Thus, we must check
		this again in row_search_for_mysql(). */
		DBUG_RETURN(2);
	}

5830
	ut_a(prebuilt->search_tuple != 0);
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	dtuple_set_n_fields(prebuilt->search_tuple, prebuilt->index->n_fields);

	dict_index_copy_types(prebuilt->search_tuple, prebuilt->index,
5835
			      prebuilt->index->n_fields);
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	/* MySQL changes the active index for a handle also during some
	queries, for example SELECT MAX(a), SUM(a) first retrieves the MAX()
	and then calculates the sum. Previously we played safe and used
	the flag ROW_MYSQL_WHOLE_ROW below, but that caused unnecessary
	copying. Starting from MySQL-4.1 we use a more efficient flag here. */

	build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS);

	DBUG_RETURN(0);
}

5848
/**********************************************************************//**
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5849
Positions an index cursor to the index specified in keynr. Fetches the
5850
row if any.
5851 5852
??? This is only used to read whole keys ???
@return	error number or 0 */
5853
UNIV_INTERN
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5854 5855 5856
int
ha_innobase::index_read_idx(
/*========================*/
5857
	uchar*		buf,		/*!< in/out: buffer for the returned
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5858
					row */
5859 5860
	uint		keynr,		/*!< in: use this index */
	const uchar*	key,		/*!< in: key value; if this is NULL
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					we position the cursor at the
					start or end of index */
5863 5864
	uint		key_len,	/*!< in: key value length */
	enum ha_rkey_function find_flag)/*!< in: search flags from my_base.h */
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{
	if (change_active_index(keynr)) {

		return(1);
	}

	return(index_read(buf, key, key_len, find_flag));
}

5874
/***********************************************************************//**
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5875
Reads the next or previous row from a cursor, which must have previously been
5876 5877
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5878
UNIV_INTERN
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5879 5880 5881
int
ha_innobase::general_fetch(
/*=======================*/
5882
	uchar*	buf,		/*!< in/out: buffer for next row in MySQL
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5883
				format */
5884 5885
	uint	direction,	/*!< in: ROW_SEL_NEXT or ROW_SEL_PREV */
	uint	match_mode)	/*!< in: 0, ROW_SEL_EXACT, or
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				ROW_SEL_EXACT_PREFIX */
{
	ulint		ret;
	int		error	= 0;

	DBUG_ENTER("general_fetch");

5893
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
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	innodb_srv_conc_enter_innodb(prebuilt->trx);

5897 5898 5899
	ret = row_search_for_mysql(
		(byte*)buf, 0, prebuilt, match_mode, direction);

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	innodb_srv_conc_exit_innodb(prebuilt->trx);

5902 5903
	switch (ret) {
	case DB_SUCCESS:
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		error = 0;
		table->status = 0;
5906 5907
		break;
	case DB_RECORD_NOT_FOUND:
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		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;
5910 5911
		break;
	case DB_END_OF_INDEX:
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		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;
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		break;
	default:
		error = convert_error_code_to_mysql(
			(int) ret, prebuilt->table->flags, user_thd);
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		table->status = STATUS_NOT_FOUND;
5919
		break;
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	}

	DBUG_RETURN(error);
}

5925
/***********************************************************************//**
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5926
Reads the next row from a cursor, which must have previously been
5927 5928
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5929
UNIV_INTERN
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int
ha_innobase::index_next(
/*====================*/
5933
	uchar*		buf)	/*!< in/out: buffer for next row in MySQL
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5934 5935
				format */
{
5936
	ha_statistic_increment(&SSV::ha_read_next_count);
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	return(general_fetch(buf, ROW_SEL_NEXT, 0));
}

5941
/*******************************************************************//**
5942 5943
Reads the next row matching to the key value given as the parameter.
@return	0, HA_ERR_END_OF_FILE, or error number */
5944
UNIV_INTERN
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int
ha_innobase::index_next_same(
/*=========================*/
5948 5949 5950
	uchar*		buf,	/*!< in/out: buffer for the row */
	const uchar*	key,	/*!< in: key value */
	uint		keylen)	/*!< in: key value length */
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5951
{
5952
	ha_statistic_increment(&SSV::ha_read_next_count);
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	return(general_fetch(buf, ROW_SEL_NEXT, last_match_mode));
}

5957
/***********************************************************************//**
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5958
Reads the previous row from a cursor, which must have previously been
5959 5960
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5961
UNIV_INTERN
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int
ha_innobase::index_prev(
/*====================*/
5965
	uchar*	buf)	/*!< in/out: buffer for previous row in MySQL format */
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5966
{
5967
	ha_statistic_increment(&SSV::ha_read_prev_count);
5968

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	return(general_fetch(buf, ROW_SEL_PREV, 0));
}

5972
/********************************************************************//**
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5973
Positions a cursor on the first record in an index and reads the
5974 5975
corresponding row to buf.
@return	0, HA_ERR_END_OF_FILE, or error code */
5976
UNIV_INTERN
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int
ha_innobase::index_first(
/*=====================*/
5980
	uchar*	buf)	/*!< in/out: buffer for the row */
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{
	int	error;

5984
	DBUG_ENTER("index_first");
5985
	ha_statistic_increment(&SSV::ha_read_first_count);
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5986

5987
	error = index_read(buf, NULL, 0, HA_READ_AFTER_KEY);
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5988

5989
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
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5990

5991 5992 5993
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
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5994

5995
	DBUG_RETURN(error);
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}

5998
/********************************************************************//**
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5999
Positions a cursor on the last record in an index and reads the
6000 6001
corresponding row to buf.
@return	0, HA_ERR_END_OF_FILE, or error code */
6002
UNIV_INTERN
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int
ha_innobase::index_last(
/*====================*/
6006
	uchar*	buf)	/*!< in/out: buffer for the row */
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{
	int	error;

6010
	DBUG_ENTER("index_last");
6011
	ha_statistic_increment(&SSV::ha_read_last_count);
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6012

6013
	error = index_read(buf, NULL, 0, HA_READ_BEFORE_KEY);
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6014

6015
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
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6016

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	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
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6020

6021
	DBUG_RETURN(error);
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}

6024
/****************************************************************//**
6025 6026
Initialize a table scan.
@return	0 or error number */
6027
UNIV_INTERN
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int
ha_innobase::rnd_init(
/*==================*/
6031
	bool	scan)	/*!< in: TRUE if table/index scan FALSE otherwise */
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{
	int	err;

	/* Store the active index value so that we can restore the original
	value after a scan */

	if (prebuilt->clust_index_was_generated) {
		err = change_active_index(MAX_KEY);
	} else {
		err = change_active_index(primary_key);
	}

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	/* Don't use semi-consistent read in random row reads (by position).
	This means we must disable semi_consistent_read if scan is false */

	if (!scan) {
		try_semi_consistent_read(0);
	}

6051
	start_of_scan = 1;
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6052

6053
	return(err);
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}

6056
/*****************************************************************//**
6057 6058
Ends a table scan.
@return	0 or error number */
6059
UNIV_INTERN
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int
ha_innobase::rnd_end(void)
/*======================*/
{
	return(index_end());
}

6067
/*****************************************************************//**
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Reads the next row in a table scan (also used to read the FIRST row
6069 6070
in a table scan).
@return	0, HA_ERR_END_OF_FILE, or error number */
6071
UNIV_INTERN
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int
ha_innobase::rnd_next(
/*==================*/
6075
	uchar*	buf)	/*!< in/out: returns the row in this buffer,
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			in MySQL format */
{
	int	error;

6080
	DBUG_ENTER("rnd_next");
6081
	ha_statistic_increment(&SSV::ha_read_rnd_next_count);
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6082

6083
	if (start_of_scan) {
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6084
		error = index_first(buf);
6085

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		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
6089

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		start_of_scan = 0;
	} else {
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
	}

6095
	DBUG_RETURN(error);
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}

6098
/**********************************************************************//**
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Fetches a row from the table based on a row reference.
@return	0, HA_ERR_KEY_NOT_FOUND, or error code */
6101
UNIV_INTERN
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int
ha_innobase::rnd_pos(
/*=================*/
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	uchar*	buf,	/*!< in/out: buffer for the row */
	uchar*	pos)	/*!< in: primary key value of the row in the
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			MySQL format, or the row id if the clustered
			index was internally generated by InnoDB; the
			length of data in pos has to be ref_length */
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{
	int		error;
	uint		keynr	= active_index;
	DBUG_ENTER("rnd_pos");
6114
	DBUG_DUMP("key", pos, ref_length);
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6115

6116
	ha_statistic_increment(&SSV::ha_read_rnd_count);
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6117

6118
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
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	if (prebuilt->clust_index_was_generated) {
		/* No primary key was defined for the table and we
		generated the clustered index from the row id: the
		row reference is the row id, not any key value
		that MySQL knows of */

		error = change_active_index(MAX_KEY);
	} else {
		error = change_active_index(primary_key);
	}

	if (error) {
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		DBUG_PRINT("error", ("Got error: %d", error));
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		DBUG_RETURN(error);
	}

	/* Note that we assume the length of the row reference is fixed
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	for the table, and it is == ref_length */
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	error = index_read(buf, pos, ref_length, HA_READ_KEY_EXACT);

	if (error) {
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		DBUG_PRINT("error", ("Got error: %d", error));
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	}

	change_active_index(keynr);

6147
	DBUG_RETURN(error);
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}

6150
/*********************************************************************//**
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Stores a reference to the current row to 'ref' field of the handle. Note
that in the case where we have generated the clustered index for the
table, the function parameter is illogical: we MUST ASSUME that 'record'
is the current 'position' of the handle, because if row ref is actually
the row id internally generated in InnoDB, then 'record' does not contain
it. We just guess that the row id must be for the record where the handle
was positioned the last time. */
6158
UNIV_INTERN
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6159 6160 6161
void
ha_innobase::position(
/*==================*/
6162
	const uchar*	record)	/*!< in: row in MySQL format */
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{
	uint		len;

6166
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
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	if (prebuilt->clust_index_was_generated) {
		/* No primary key was defined for the table and we
		generated the clustered index from row id: the
		row reference will be the row id, not any key value
		that MySQL knows of */

		len = DATA_ROW_ID_LEN;

		memcpy(ref, prebuilt->row_id, len);
	} else {
		len = store_key_val_for_row(primary_key, (char*)ref,
							 ref_length, record);
	}

	/* We assume that the 'ref' value len is always fixed for the same
	table. */
6184

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	if (len != ref_length) {
	  sql_print_error("Stored ref len is %lu, but table ref len is %lu",
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			  (ulong) len, (ulong) ref_length);
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	}
}

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/* limit innodb monitor access to users with PROCESS privilege.
See http://bugs.mysql.com/32710 for expl. why we choose PROCESS. */
#define IS_MAGIC_TABLE_AND_USER_DENIED_ACCESS(table_name, thd) \
	(row_is_magic_monitor_table(table_name) \
	 && check_global_access(thd, PROCESS_ACL))

6197
/*****************************************************************//**
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Creates a table definition to an InnoDB database. */
static
int
create_table_def(
/*=============*/
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	trx_t*		trx,		/*!< in: InnoDB transaction handle */
	TABLE*		form,		/*!< in: information on table
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6205
					columns and indexes */
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	const char*	table_name,	/*!< in: table name */
	const char*	path_of_temp_table,/*!< in: if this is a table explicitly
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					created by the user with the
					TEMPORARY keyword, then this
					parameter is the dir path where the
					table should be placed if we create
					an .ibd file for it (no .ibd extension
					in the path, though); otherwise this
					is NULL */
6215
	ulint		flags)		/*!< in: table flags */
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{
	Field*		field;
	dict_table_t*	table;
	ulint		n_cols;
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	int		error;
	ulint		col_type;
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	ulint		col_len;
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	ulint		nulls_allowed;
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	ulint		unsigned_type;
	ulint		binary_type;
	ulint		long_true_varchar;
	ulint		charset_no;
6228
	ulint		i;
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6229

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	DBUG_ENTER("create_table_def");
	DBUG_PRINT("enter", ("table_name: %s", table_name));
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6232

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	ut_a(trx->mysql_thd != NULL);
	if (IS_MAGIC_TABLE_AND_USER_DENIED_ACCESS(table_name,
						  (THD*) trx->mysql_thd)) {
		DBUG_RETURN(HA_ERR_GENERIC);
	}

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	n_cols = form->s->fields;

	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */

6244
	table = dict_mem_table_create(table_name, 0, n_cols, flags);
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	if (path_of_temp_table) {
		table->dir_path_of_temp_table =
			mem_heap_strdup(table->heap, path_of_temp_table);
	}

	for (i = 0; i < n_cols; i++) {
		field = form->field[i];

		col_type = get_innobase_type_from_mysql_type(&unsigned_type,
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							     field);

		if (!col_type) {
			push_warning_printf(
				(THD*) trx->mysql_thd,
				MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_CANT_CREATE_TABLE,
				"Error creating table '%s' with "
				"column '%s'. Please check its "
				"column type and try to re-create "
				"the table with an appropriate "
				"column type.",
				table->name, (char*) field->field_name);
			goto err_col;
		}

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		if (field->null_ptr) {
			nulls_allowed = 0;
		} else {
			nulls_allowed = DATA_NOT_NULL;
		}

		if (field->binary()) {
			binary_type = DATA_BINARY_TYPE;
		} else {
			binary_type = 0;
		}

6283
		charset_no = 0;
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		if (dtype_is_string_type(col_type)) {

			charset_no = (ulint)field->charset()->number;

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			if (UNIV_UNLIKELY(charset_no >= 256)) {
				/* in data0type.h we assume that the
				number fits in one byte in prtype */
				push_warning_printf(
					(THD*) trx->mysql_thd,
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					MYSQL_ERROR::WARN_LEVEL_WARN,
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					ER_CANT_CREATE_TABLE,
					"In InnoDB, charset-collation codes"
					" must be below 256."
					" Unsupported code %lu.",
					(ulong) charset_no);
				DBUG_RETURN(ER_CANT_CREATE_TABLE);
			}
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		}

		ut_a(field->type() < 256); /* we assume in dtype_form_prtype()
					   that this fits in one byte */
		col_len = field->pack_length();

		/* The MySQL pack length contains 1 or 2 bytes length field
		for a true VARCHAR. Let us subtract that, so that the InnoDB
		column length in the InnoDB data dictionary is the real
		maximum byte length of the actual data. */
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		long_true_varchar = 0;

		if (field->type() == MYSQL_TYPE_VARCHAR) {
			col_len -= ((Field_varstring*)field)->length_bytes;

			if (((Field_varstring*)field)->length_bytes == 2) {
				long_true_varchar = DATA_LONG_TRUE_VARCHAR;
			}
		}

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		/* First check whether the column to be added has a
		system reserved name. */
		if (dict_col_name_is_reserved(field->field_name)){
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			my_error(ER_WRONG_COLUMN_NAME, MYF(0),
				 field->field_name);
6328
err_col:
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			dict_mem_table_free(table);
			trx_commit_for_mysql(trx);

			error = DB_ERROR;
			goto error_ret;
		}

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		dict_mem_table_add_col(table, table->heap,
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			(char*) field->field_name,
			col_type,
			dtype_form_prtype(
				(ulint)field->type()
				| nulls_allowed | unsigned_type
				| binary_type | long_true_varchar,
				charset_no),
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			col_len);
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	}

	error = row_create_table_for_mysql(table, trx);

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	if (error == DB_DUPLICATE_KEY) {
		char buf[100];
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		char* buf_end = innobase_convert_identifier(
			buf, sizeof buf - 1, table_name, strlen(table_name),
			trx->mysql_thd, TRUE);

		*buf_end = '\0';
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		my_error(ER_TABLE_EXISTS_ERROR, MYF(0), buf);
	}

6359
error_ret:
6360
	error = convert_error_code_to_mysql(error, flags, NULL);
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	DBUG_RETURN(error);
}

6365
/*****************************************************************//**
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Creates an index in an InnoDB database. */
static
int
create_index(
/*=========*/
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	trx_t*		trx,		/*!< in: InnoDB transaction handle */
	TABLE*		form,		/*!< in: information on table
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6373
					columns and indexes */
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	ulint		flags,		/*!< in: InnoDB table flags */
	const char*	table_name,	/*!< in: table name */
	uint		key_num)	/*!< in: index number */
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{
	Field*		field;
	dict_index_t*	index;
6380
	int		error;
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	ulint		n_fields;
	KEY*		key;
	KEY_PART_INFO*	key_part;
	ulint		ind_type;
	ulint		col_type;
	ulint		prefix_len;
	ulint		is_unsigned;
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	ulint		i;
	ulint		j;
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	ulint*		field_lengths;
6391 6392

	DBUG_ENTER("create_index");
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	key = form->key_info + key_num;

6396
	n_fields = key->key_parts;
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6397

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	/* Assert that "GEN_CLUST_INDEX" cannot be used as non-primary index */
	ut_a(innobase_strcasecmp(key->name, innobase_index_reserve_name) != 0);

6401
	ind_type = 0;
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6402

6403
	if (key_num == form->s->primary_key) {
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		ind_type = ind_type | DICT_CLUSTERED;
	}

	if (key->flags & HA_NOSAME ) {
		ind_type = ind_type | DICT_UNIQUE;
	}

	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */

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	index = dict_mem_index_create(table_name, key->name, 0,
				      ind_type, n_fields);
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	field_lengths = (ulint*) my_malloc(sizeof(ulint) * n_fields,
		MYF(MY_FAE));
6419

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	for (i = 0; i < n_fields; i++) {
		key_part = key->key_part + i;

		/* (The flag HA_PART_KEY_SEG denotes in MySQL a column prefix
		field in an index: we only store a specified number of first
		bytes of the column to the index field.) The flag does not
		seem to be properly set by MySQL. Let us fall back on testing
		the length of the key part versus the column. */
6428

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		field = NULL;
		for (j = 0; j < form->s->fields; j++) {

			field = form->field[j];

			if (0 == innobase_strcasecmp(
					field->field_name,
					key_part->field->field_name)) {
				/* Found the corresponding column */

				break;
			}
		}

		ut_a(j < form->s->fields);

		col_type = get_innobase_type_from_mysql_type(
					&is_unsigned, key_part->field);

		if (DATA_BLOB == col_type
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			|| (key_part->length < field->pack_length()
				&& field->type() != MYSQL_TYPE_VARCHAR)
			|| (field->type() == MYSQL_TYPE_VARCHAR
				&& key_part->length < field->pack_length()
				- ((Field_varstring*)field)->length_bytes)) {
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6454

6455
			prefix_len = key_part->length;
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6456 6457

			if (col_type == DATA_INT
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				|| col_type == DATA_FLOAT
				|| col_type == DATA_DOUBLE
				|| col_type == DATA_DECIMAL) {
				sql_print_error(
					"MySQL is trying to create a column "
					"prefix index field, on an "
					"inappropriate data type. Table "
					"name %s, column name %s.",
					table_name,
					key_part->field->field_name);

				prefix_len = 0;
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			}
		} else {
6472
			prefix_len = 0;
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		}

		field_lengths[i] = key_part->length;

		dict_mem_index_add_field(index,
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			(char*) key_part->field->field_name, prefix_len);
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	}

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	/* Even though we've defined max_supported_key_part_length, we
	still do our own checking using field_lengths to be absolutely
	sure we don't create too long indexes. */
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	error = row_create_index_for_mysql(index, trx, field_lengths);

6486
	error = convert_error_code_to_mysql(error, flags, NULL);
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6487

6488
	my_free(field_lengths);
6489

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	DBUG_RETURN(error);
}

6493
/*****************************************************************//**
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Creates an index to an InnoDB table when the user has defined no
primary index. */
static
int
create_clustered_index_when_no_primary(
/*===================================*/
6500 6501 6502
	trx_t*		trx,		/*!< in: InnoDB transaction handle */
	ulint		flags,		/*!< in: InnoDB table flags */
	const char*	table_name)	/*!< in: table name */
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6503 6504
{
	dict_index_t*	index;
6505
	int		error;
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	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
6509 6510
	index = dict_mem_index_create(table_name,
				      innobase_index_reserve_name,
6511
				      0, DICT_CLUSTERED, 0);
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	error = row_create_index_for_mysql(index, trx, NULL);

6515
	error = convert_error_code_to_mysql(error, flags, NULL);
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	return(error);
}

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/*****************************************************************//**
Return a display name for the row format
@return row format name */
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UNIV_INTERN
const char*
get_row_format_name(
/*================*/
	enum row_type	row_format)		/*!< in: Row Format */
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{
	switch (row_format) {
	case ROW_TYPE_COMPACT:
		return("COMPACT");
	case ROW_TYPE_COMPRESSED:
		return("COMPRESSED");
	case ROW_TYPE_DYNAMIC:
		return("DYNAMIC");
	case ROW_TYPE_REDUNDANT:
		return("REDUNDANT");
	case ROW_TYPE_DEFAULT:
		return("DEFAULT");
	case ROW_TYPE_FIXED:
		return("FIXED");
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	case ROW_TYPE_PAGE:
	case ROW_TYPE_NOT_USED:
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		break;
	}
	return("NOT USED");
}

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/** If file-per-table is missing, issue warning and set ret false */
#define CHECK_ERROR_ROW_TYPE_NEEDS_FILE_PER_TABLE		\
	if (!srv_file_per_table) {				\
		push_warning_printf(				\
			thd, MYSQL_ERROR::WARN_LEVEL_WARN,	\
			ER_ILLEGAL_HA_CREATE_OPTION,		\
			"InnoDB: ROW_FORMAT=%s requires"	\
			" innodb_file_per_table.",		\
			get_row_format_name(row_format));	\
		ret = FALSE;					\
	}

/** If file-format is Antelope, issue warning and set ret false */
#define CHECK_ERROR_ROW_TYPE_NEEDS_GT_ANTELOPE			\
	if (srv_file_format < DICT_TF_FORMAT_ZIP) {		\
		push_warning_printf(				\
			thd, MYSQL_ERROR::WARN_LEVEL_WARN,	\
			ER_ILLEGAL_HA_CREATE_OPTION,		\
			"InnoDB: ROW_FORMAT=%s requires"	\
			" innodb_file_format > Antelope.",	\
			get_row_format_name(row_format));	\
		ret = FALSE;					\
	}


6574
/*****************************************************************//**
6575 6576 6577
Validates the create options. We may build on this function
in future. For now, it checks two specifiers:
KEY_BLOCK_SIZE and ROW_FORMAT
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If innodb_strict_mode is not set then this function is a no-op
@return	TRUE if valid. */
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static
ibool
create_options_are_valid(
/*=====================*/
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	THD*		thd,		/*!< in: connection thread. */
	TABLE*		form,		/*!< in: information on table
6586
					columns and indexes */
6587
	HA_CREATE_INFO*	create_info)	/*!< in: create info. */
6588
{
6589
	ibool	kbs_specified	= FALSE;
6590
	ibool	ret		= TRUE;
6591
	enum row_type	row_format	= form->s->row_type;
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	ut_ad(thd != NULL);

	/* If innodb_strict_mode is not set don't do any validation. */
	if (!(THDVAR(thd, strict_mode))) {
		return(TRUE);
	}

	ut_ad(form != NULL);
	ut_ad(create_info != NULL);

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	/* First check if a non-zero KEY_BLOCK_SIZE was specified. */
	if (create_info->key_block_size) {
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		kbs_specified = TRUE;
		switch (create_info->key_block_size) {
		case 1:
		case 2:
		case 4:
		case 8:
		case 16:
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			/* Valid KEY_BLOCK_SIZE, check its dependencies. */
			if (!srv_file_per_table) {
				push_warning(
					thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					ER_ILLEGAL_HA_CREATE_OPTION,
					"InnoDB: KEY_BLOCK_SIZE requires"
					" innodb_file_per_table.");
				ret = FALSE;
			}
			if (srv_file_format < DICT_TF_FORMAT_ZIP) {
				push_warning(
					thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					ER_ILLEGAL_HA_CREATE_OPTION,
					"InnoDB: KEY_BLOCK_SIZE requires"
					" innodb_file_format > Antelope.");
					ret = FALSE;
			}
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			break;
		default:
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			push_warning_printf(
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_ILLEGAL_HA_CREATE_OPTION,
				"InnoDB: invalid KEY_BLOCK_SIZE = %lu."
				" Valid values are [1, 2, 4, 8, 16]",
				create_info->key_block_size);
6637
			ret = FALSE;
6638
			break;
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		}
	}
	
6642 6643 6644
	/* Check for a valid Innodb ROW_FORMAT specifier and
	other incompatibilities. */
	switch (row_format) {
6645
	case ROW_TYPE_COMPRESSED:
6646 6647
		CHECK_ERROR_ROW_TYPE_NEEDS_FILE_PER_TABLE;
		CHECK_ERROR_ROW_TYPE_NEEDS_GT_ANTELOPE;
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		break;
	case ROW_TYPE_DYNAMIC:
6650 6651 6652 6653 6654
		CHECK_ERROR_ROW_TYPE_NEEDS_FILE_PER_TABLE;
		CHECK_ERROR_ROW_TYPE_NEEDS_GT_ANTELOPE;
		/* fall through since dynamic also shuns KBS */
	case ROW_TYPE_COMPACT:
	case ROW_TYPE_REDUNDANT:
6655 6656 6657 6658 6659 6660
		if (kbs_specified) {
			push_warning_printf(
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_ILLEGAL_HA_CREATE_OPTION,
				"InnoDB: cannot specify ROW_FORMAT = %s"
				" with KEY_BLOCK_SIZE.",
6661 6662
				get_row_format_name(row_format));
			ret = FALSE;
6663
		}
6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674
		break;
	case ROW_TYPE_DEFAULT:
		break;
	case ROW_TYPE_FIXED:
	case ROW_TYPE_PAGE:
	case ROW_TYPE_NOT_USED:
		push_warning(
			thd, MYSQL_ERROR::WARN_LEVEL_WARN,
			ER_ILLEGAL_HA_CREATE_OPTION,		\
			"InnoDB: invalid ROW_FORMAT specifier.");
		ret = FALSE;
6675
		break;
6676 6677 6678 6679 6680
	}

	return(ret);
}

6681
/*****************************************************************//**
6682
Update create_info.  Used in SHOW CREATE TABLE et al. */
6683
UNIV_INTERN
6684 6685 6686
void
ha_innobase::update_create_info(
/*============================*/
6687
	HA_CREATE_INFO* create_info)	/*!< in/out: create info */
6688 6689 6690 6691 6692 6693 6694
{
  if (!(create_info->used_fields & HA_CREATE_USED_AUTO)) {
    ha_innobase::info(HA_STATUS_AUTO);
    create_info->auto_increment_value = stats.auto_increment_value;
  }
}

6695
/*****************************************************************//**
6696 6697
Creates a new table to an InnoDB database.
@return	error number */
6698
UNIV_INTERN
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6699 6700 6701
int
ha_innobase::create(
/*================*/
6702 6703
	const char*	name,		/*!< in: table name */
	TABLE*		form,		/*!< in: information on table
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6704
					columns and indexes */
6705
	HA_CREATE_INFO*	create_info)	/*!< in: more information of the
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6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716
					created table, contains also the
					create statement string */
{
	int		error;
	dict_table_t*	innobase_table;
	trx_t*		parent_trx;
	trx_t*		trx;
	int		primary_key_no;
	uint		i;
	char		name2[FN_REFLEN];
	char		norm_name[FN_REFLEN];
6717
	THD*		thd = ha_thd();
6718
	ib_int64_t	auto_inc_value;
6719
	ulint		flags;
6720 6721 6722
	/* Cache the value of innodb_file_format, in case it is
	modified by another thread while the table is being created. */
	const ulint	file_format = srv_file_format;
6723 6724
	const char*	stmt;
	size_t		stmt_len;
6725
	enum row_type	row_format;
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6726

6727
	DBUG_ENTER("ha_innobase::create");
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6728 6729

	DBUG_ASSERT(thd != NULL);
6730 6731 6732 6733 6734 6735 6736
	DBUG_ASSERT(create_info != NULL);

#ifdef __WIN__
	/* Names passed in from server are in two formats:
	1. <database_name>/<table_name>: for normal table creation
	2. full path: for temp table creation, or sym link

6737 6738
	When srv_file_per_table is on and mysqld_embedded is off,
	check for full path pattern, i.e.
6739 6740 6741 6742 6743 6744
	X:\dir\...,		X is a driver letter, or
	\\dir1\dir2\...,	UNC path
	returns error if it is in full path format, but not creating a temp.
	table. Currently InnoDB does not support symbolic link on Windows. */

	if (srv_file_per_table
6745
	    && !mysqld_embedded
6746 6747 6748 6749 6750 6751 6752 6753 6754
	    && (!create_info->options & HA_LEX_CREATE_TMP_TABLE)) {

		if ((name[1] == ':')
		    || (name[0] == '\\' && name[1] == '\\')) {
			sql_print_error("Cannot create table %s\n", name);
			DBUG_RETURN(HA_ERR_GENERIC);
		}
	}
#endif
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6755 6756 6757 6758 6759

	if (form->s->fields > 1000) {
		/* The limit probably should be REC_MAX_N_FIELDS - 3 = 1020,
		but we play safe here */

6760 6761
		DBUG_RETURN(HA_ERR_TO_BIG_ROW);
	}
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6762 6763 6764

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
6765

6766
	parent_trx = check_trx_exists(thd);
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6767 6768 6769 6770

	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

6771 6772
	trx_search_latch_release_if_reserved(parent_trx);

6773
	trx = innobase_trx_allocate(thd);
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6774

6775
	srv_lower_case_table_names = lower_case_table_names;
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6776

6777
	strcpy(name2, name);
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6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788

	normalize_table_name(norm_name, name2);

	/* Latch the InnoDB data dictionary exclusively so that no deadlocks
	or lock waits can happen in it during a table create operation.
	Drop table etc. do this latching in row0mysql.c. */

	row_mysql_lock_data_dictionary(trx);

	/* Create the table definition in InnoDB */

6789 6790
	flags = 0;

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	/* Validate create options if innodb_strict_mode is set. */
	if (!create_options_are_valid(thd, form, create_info)) {
		error = ER_ILLEGAL_HA_CREATE_OPTION;
		goto cleanup;
	}
6796

6797
	if (create_info->key_block_size) {
6798 6799 6800 6801 6802 6803
		/* Determine the page_zip.ssize corresponding to the
		requested page size (key_block_size) in kilobytes. */

		ulint	ssize, ksize;
		ulint	key_block_size = create_info->key_block_size;

6804 6805
		/*  Set 'flags' to the correct key_block_size.
		It will be zero if key_block_size is an invalid number.*/
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		for (ssize = ksize = 1; ssize <= DICT_TF_ZSSIZE_MAX;
		     ssize++, ksize <<= 1) {
			if (key_block_size == ksize) {
				flags = ssize << DICT_TF_ZSSIZE_SHIFT
					| DICT_TF_COMPACT
					| DICT_TF_FORMAT_ZIP
					  << DICT_TF_FORMAT_SHIFT;
				break;
			}
6815 6816 6817
		}

		if (!srv_file_per_table) {
6818 6819 6820 6821 6822
			push_warning(
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_ILLEGAL_HA_CREATE_OPTION,
				"InnoDB: KEY_BLOCK_SIZE requires"
				" innodb_file_per_table.");
6823 6824 6825 6826
			flags = 0;
		}

		if (file_format < DICT_TF_FORMAT_ZIP) {
6827 6828 6829 6830 6831
			push_warning(
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_ILLEGAL_HA_CREATE_OPTION,
				"InnoDB: KEY_BLOCK_SIZE requires"
				" innodb_file_format > Antelope.");
6832 6833 6834 6835
			flags = 0;
		}

		if (!flags) {
6836 6837 6838
			push_warning_printf(
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_ILLEGAL_HA_CREATE_OPTION,
6839
				"InnoDB: ignoring KEY_BLOCK_SIZE=%lu.",
6840
				create_info->key_block_size);
6841 6842 6843
		}
	}

6844
	row_format = form->s->row_type;
6845 6846

	if (flags) {
6847 6848
		/* if ROW_FORMAT is set to default,
		automatically change it to COMPRESSED.*/
6849 6850 6851
		if (row_format == ROW_TYPE_DEFAULT) {
			row_format = ROW_TYPE_COMPRESSED;
		} else if (row_format != ROW_TYPE_COMPRESSED) {
6852 6853 6854 6855 6856 6857 6858
			/* ROW_FORMAT other than COMPRESSED
			ignores KEY_BLOCK_SIZE.  It does not
			make sense to reject conflicting
			KEY_BLOCK_SIZE and ROW_FORMAT, because
			such combinations can be obtained
			with ALTER TABLE anyway. */
			push_warning_printf(
6859
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
6860 6861 6862 6863 6864 6865 6866
				ER_ILLEGAL_HA_CREATE_OPTION,
				"InnoDB: ignoring KEY_BLOCK_SIZE=%lu"
				" unless ROW_FORMAT=COMPRESSED.",
				create_info->key_block_size);
			flags = 0;
		}
	} else {
6867
		/* flags == 0 means no KEY_BLOCK_SIZE.*/
6868
		if (row_format == ROW_TYPE_COMPRESSED) {
6869 6870 6871 6872 6873 6874 6875 6876
			/* ROW_FORMAT=COMPRESSED without
			KEY_BLOCK_SIZE implies half the
			maximum KEY_BLOCK_SIZE. */
			flags = (DICT_TF_ZSSIZE_MAX - 1)
				<< DICT_TF_ZSSIZE_SHIFT
				| DICT_TF_COMPACT
				| DICT_TF_FORMAT_ZIP
				<< DICT_TF_FORMAT_SHIFT;
6877 6878 6879
#if DICT_TF_ZSSIZE_MAX < 1
# error "DICT_TF_ZSSIZE_MAX < 1"
#endif
6880
		}
6881
	}
6882

6883
	switch (row_format) {
6884 6885 6886 6887 6888 6889
	case ROW_TYPE_REDUNDANT:
		break;
	case ROW_TYPE_COMPRESSED:
	case ROW_TYPE_DYNAMIC:
		if (!srv_file_per_table) {
			push_warning_printf(
6890
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
6891
				ER_ILLEGAL_HA_CREATE_OPTION,
6892 6893
				"InnoDB: ROW_FORMAT=%s requires"
				" innodb_file_per_table.",
6894
				get_row_format_name(row_format));
6895 6896
		} else if (file_format < DICT_TF_FORMAT_ZIP) {
			push_warning_printf(
6897
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
6898
				ER_ILLEGAL_HA_CREATE_OPTION,
6899 6900
				"InnoDB: ROW_FORMAT=%s requires"
				" innodb_file_format > Antelope.",
6901
				get_row_format_name(row_format));
6902 6903
		} else {
			flags |= DICT_TF_COMPACT
6904 6905
			         | (DICT_TF_FORMAT_ZIP
			            << DICT_TF_FORMAT_SHIFT);
6906 6907
			break;
		}
6908 6909 6910 6911

		/* fall through */
	case ROW_TYPE_NOT_USED:
	case ROW_TYPE_FIXED:
6912
	case ROW_TYPE_PAGE:
6913 6914 6915 6916
		push_warning(
			thd, MYSQL_ERROR::WARN_LEVEL_WARN,
			ER_ILLEGAL_HA_CREATE_OPTION,
			"InnoDB: assuming ROW_FORMAT=COMPACT.");
6917 6918
	case ROW_TYPE_DEFAULT:
	case ROW_TYPE_COMPACT:
6919
		flags = DICT_TF_COMPACT;
6920
		break;
6921 6922
	}

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6923 6924
	/* Look for a primary key */

6925
	primary_key_no= (form->s->primary_key != MAX_KEY ?
6926
			 (int) form->s->primary_key :
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6927 6928
			 -1);

6929
	/* Our function innobase_get_mysql_key_number_for_index assumes
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6930 6931
	the primary key is always number 0, if it exists */

6932
	ut_a(primary_key_no == -1 || primary_key_no == 0);
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6933

6934 6935
	/* Check for name conflicts (with reserved name) for
	any user indices to be created. */
6936 6937
	if (innobase_index_name_is_reserved(trx, form->key_info,
					    form->s->keys)) {
6938 6939 6940 6941
		error = -1;
		goto cleanup;
	}

6942 6943 6944 6945
	if (create_info->options & HA_LEX_CREATE_TMP_TABLE) {
		flags |= DICT_TF2_TEMPORARY << DICT_TF2_SHIFT;
	}

6946 6947 6948 6949 6950 6951 6952 6953 6954
	error = create_table_def(trx, form, norm_name,
		create_info->options & HA_LEX_CREATE_TMP_TABLE ? name2 : NULL,
		flags);

	if (error) {
		goto cleanup;
	}


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6955 6956 6957 6958 6959 6960 6961
	/* Create the keys */

	if (form->s->keys == 0 || primary_key_no == -1) {
		/* Create an index which is used as the clustered index;
		order the rows by their row id which is internally generated
		by InnoDB */

6962
		error = create_clustered_index_when_no_primary(
6963
			trx, flags, norm_name);
6964
		if (error) {
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6965
			goto cleanup;
6966
		}
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6967 6968 6969 6970 6971
	}

	if (primary_key_no != -1) {
		/* In InnoDB the clustered index must always be created
		first */
6972
		if ((error = create_index(trx, form, flags, norm_name,
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6973 6974
					  (uint) primary_key_no))) {
			goto cleanup;
6975 6976
		}
	}
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6977 6978 6979 6980 6981

	for (i = 0; i < form->s->keys; i++) {

		if (i != (uint) primary_key_no) {

6982 6983
			if ((error = create_index(trx, form, flags, norm_name,
						  i))) {
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6984
				goto cleanup;
6985 6986 6987
			}
		}
	}
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6988

6989 6990 6991 6992 6993
	stmt = innobase_get_stmt(thd, &stmt_len);

	if (stmt) {
		error = row_table_add_foreign_constraints(
			trx, stmt, stmt_len, norm_name,
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6994 6995
			create_info->options & HA_LEX_CREATE_TMP_TABLE);

6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015 7016 7017 7018
		switch (error) {

		case DB_PARENT_NO_INDEX:
			push_warning_printf(
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				HA_ERR_CANNOT_ADD_FOREIGN,
				"Create table '%s' with foreign key constraint"
				" failed. There is no index in the referenced"
				" table where the referenced columns appear"
				" as the first columns.\n", norm_name);
			break;

		case DB_CHILD_NO_INDEX:
			push_warning_printf(
				thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				HA_ERR_CANNOT_ADD_FOREIGN,
				"Create table '%s' with foreign key constraint"
				" failed. There is no index in the referencing"
				" table where referencing columns appear"
				" as the first columns.\n", norm_name);
			break;
                }

7019
		error = convert_error_code_to_mysql(error, flags, NULL);
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7020 7021 7022 7023 7024 7025

		if (error) {
			goto cleanup;
		}
	}

7026
	innobase_commit_low(trx);
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7027 7028 7029 7030 7031 7032 7033 7034 7035

	row_mysql_unlock_data_dictionary(trx);

	/* Flush the log to reduce probability that the .frm files and
	the InnoDB data dictionary get out-of-sync if the user runs
	with innodb_flush_log_at_trx_commit = 0 */

	log_buffer_flush_to_disk();

7036
	innobase_table = dict_table_get(norm_name, FALSE);
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7037 7038 7039

	DBUG_ASSERT(innobase_table != 0);

7040 7041 7042
	if (innobase_table) {
		/* We update the highest file format in the system table
		space, if this table has higher file format setting. */
7043

7044
		trx_sys_file_format_max_upgrade(
7045
			(const char**) &innobase_file_format_max,
7046 7047
			dict_table_get_format(innobase_table));
	}
7048 7049 7050 7051 7052

	/* Note: We can't call update_thd() as prebuilt will not be
	setup at this stage and so we use thd. */

	/* We need to copy the AUTOINC value from the old table if
7053 7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064
	this is an ALTER|OPTIMIZE TABLE or CREATE INDEX because CREATE INDEX
	does a table copy too. If query was one of :

		CREATE TABLE ...AUTO_INCREMENT = x; or
		ALTER TABLE...AUTO_INCREMENT = x;   or
		OPTIMIZE TABLE t; or
		CREATE INDEX x on t(...);

	Find out a table definition from the dictionary and get
	the current value of the auto increment field. Set a new
	value to the auto increment field if the value is greater
	than the maximum value in the column. */
7065 7066

	if (((create_info->used_fields & HA_CREATE_USED_AUTO)
7067
	    || thd_sql_command(thd) == SQLCOM_ALTER_TABLE
7068
	    || thd_sql_command(thd) == SQLCOM_OPTIMIZE
7069 7070 7071
	    || thd_sql_command(thd) == SQLCOM_CREATE_INDEX)
	    && create_info->auto_increment_value > 0) {

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7072
		auto_inc_value = create_info->auto_increment_value;
7073 7074

		dict_table_autoinc_lock(innobase_table);
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7075
		dict_table_autoinc_initialize(innobase_table, auto_inc_value);
7076
		dict_table_autoinc_unlock(innobase_table);
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7077 7078 7079 7080 7081 7082 7083
	}

	/* Tell the InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

7084
	trx_free_for_mysql(trx);
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7085 7086 7087 7088 7089

	DBUG_RETURN(0);

cleanup:
	innobase_commit_low(trx);
7090

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7091
	row_mysql_unlock_data_dictionary(trx);
7092

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7093 7094 7095 7096 7097
	trx_free_for_mysql(trx);

	DBUG_RETURN(error);
}

7098
/*****************************************************************//**
7099 7100
Discards or imports an InnoDB tablespace.
@return	0 == success, -1 == error */
7101
UNIV_INTERN
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7102 7103 7104
int
ha_innobase::discard_or_import_tablespace(
/*======================================*/
7105
	my_bool discard)	/*!< in: TRUE if discard, else import */
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7106 7107 7108 7109 7110
{
	dict_table_t*	dict_table;
	trx_t*		trx;
	int		err;

7111
	DBUG_ENTER("ha_innobase::discard_or_import_tablespace");
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7112

7113 7114
	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
7115
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
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7116 7117 7118 7119 7120 7121 7122 7123 7124 7125

	dict_table = prebuilt->table;
	trx = prebuilt->trx;

	if (discard) {
		err = row_discard_tablespace_for_mysql(dict_table->name, trx);
	} else {
		err = row_import_tablespace_for_mysql(dict_table->name, trx);
	}

7126
	err = convert_error_code_to_mysql(err, dict_table->flags, NULL);
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7127 7128 7129 7130

	DBUG_RETURN(err);
}

7131
/*****************************************************************//**
7132 7133
Deletes all rows of an InnoDB table.
@return	error number */
7134
UNIV_INTERN
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7135
int
7136
ha_innobase::truncate(void)
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7137 7138 7139 7140
/*==============================*/
{
	int		error;

7141
	DBUG_ENTER("ha_innobase::truncate");
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osku committed
7142

7143 7144 7145 7146 7147
	/* Get the transaction associated with the current thd, or create one
	if not yet created, and update prebuilt->trx */

	update_thd(ha_thd());

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7148 7149
	/* Truncate the table in InnoDB */

7150
	error = row_truncate_table_for_mysql(prebuilt->table, prebuilt->trx);
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7151

7152 7153
	error = convert_error_code_to_mysql(error, prebuilt->table->flags,
					    NULL);
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	DBUG_RETURN(error);
}

7158
/*****************************************************************//**
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Drops a table from an InnoDB database. Before calling this function,
MySQL calls innobase_commit to commit the transaction of the current user.
Then the current user cannot have locks set on the table. Drop table
operation inside InnoDB will remove all locks any user has on the table
7163 7164
inside InnoDB.
@return	error number */
7165
UNIV_INTERN
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7166 7167 7168
int
ha_innobase::delete_table(
/*======================*/
7169
	const char*	name)	/*!< in: table name */
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7170 7171 7172 7173 7174
{
	ulint	name_len;
	int	error;
	trx_t*	parent_trx;
	trx_t*	trx;
7175
	THD	*thd = ha_thd();
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7176 7177
	char	norm_name[1000];

7178
	DBUG_ENTER("ha_innobase::delete_table");
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osku committed
7179

7180 7181 7182 7183 7184 7185 7186 7187
	/* Strangely, MySQL passes the table name without the '.frm'
	extension, in contrast to ::create */
	normalize_table_name(norm_name, name);

	if (IS_MAGIC_TABLE_AND_USER_DENIED_ACCESS(norm_name, thd)) {
		DBUG_RETURN(HA_ERR_GENERIC);
	}

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7188 7189
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7190

7191
	parent_trx = check_trx_exists(thd);
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7192 7193 7194 7195

	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

7196
	trx_search_latch_release_if_reserved(parent_trx);
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7197

7198 7199
	trx = innobase_trx_allocate(thd);

7200
	srv_lower_case_table_names = lower_case_table_names;
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7201 7202 7203

	name_len = strlen(name);

7204
	ut_a(name_len < 1000);
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7205

7206
	/* Drop the table in InnoDB */
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7207 7208

	error = row_drop_table_for_mysql(norm_name, trx,
7209 7210
					 thd_sql_command(thd)
					 == SQLCOM_DROP_DB);
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	/* Flush the log to reduce probability that the .frm files and
	the InnoDB data dictionary get out-of-sync if the user runs
	with innodb_flush_log_at_trx_commit = 0 */

	log_buffer_flush_to_disk();

	/* Tell the InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

7223
	innobase_commit_low(trx);
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7224

7225
	trx_free_for_mysql(trx);
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7226

7227
	error = convert_error_code_to_mysql(error, 0, NULL);
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	DBUG_RETURN(error);
}

7232
/*****************************************************************//**
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7233
Removes all tables in the named database inside InnoDB. */
7234
static
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7235
void
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7236 7237
innobase_drop_database(
/*===================*/
7238 7239
	handlerton *hton, /*!< in: handlerton of Innodb */
	char*	path)	/*!< in: database path; inside InnoDB the name
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7240 7241 7242 7243 7244 7245 7246 7247
			of the last directory in the path is used as
			the database name: for example, in 'mysql/data/test'
			the database name is 'test' */
{
	ulint	len		= 0;
	trx_t*	trx;
	char*	ptr;
	char*	namebuf;
7248
	THD*	thd		= current_thd;
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7249 7250 7251

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7252

7253 7254
	DBUG_ASSERT(hton == innodb_hton_ptr);

7255 7256 7257
	/* In the Windows plugin, thd = current_thd is always NULL */
	if (thd) {
		trx_t*	parent_trx = check_trx_exists(thd);
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7258

7259 7260 7261
		/* In case MySQL calls this in the middle of a SELECT
		query, release possible adaptive hash latch to avoid
		deadlocks of threads */
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7262

7263 7264
		trx_search_latch_release_if_reserved(parent_trx);
	}
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	ptr = strend(path) - 2;

	while (ptr >= path && *ptr != '\\' && *ptr != '/') {
		ptr--;
		len++;
	}

	ptr++;
7274
	namebuf = (char*) my_malloc((uint) len + 2, MYF(0));
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7275 7276 7277 7278

	memcpy(namebuf, ptr, len);
	namebuf[len] = '/';
	namebuf[len + 1] = '\0';
7279
#ifdef	__WIN__
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7280 7281
	innobase_casedn_str(namebuf);
#endif
7282 7283
#if defined __WIN__ && !defined MYSQL_SERVER
	/* In the Windows plugin, thd = current_thd is always NULL */
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7284
	trx = trx_allocate_for_mysql();
7285 7286 7287 7288
	trx->mysql_thd = NULL;
#else
	trx = innobase_trx_allocate(thd);
#endif
7289
	row_drop_database_for_mysql(namebuf, trx);
7290
	my_free(namebuf);
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	/* Flush the log to reduce probability that the .frm files and
	the InnoDB data dictionary get out-of-sync if the user runs
	with innodb_flush_log_at_trx_commit = 0 */

	log_buffer_flush_to_disk();

	/* Tell the InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

7303 7304
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
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7305
}
7306
/*********************************************************************//**
7307 7308
Renames an InnoDB table.
@return	0 or error code */
7309 7310 7311 7312
static
int
innobase_rename_table(
/*==================*/
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	trx_t*		trx,	/*!< in: transaction */
	const char*	from,	/*!< in: old name of the table */
	const char*	to,	/*!< in: new name of the table */
7316
	ibool		lock_and_commit)
7317
				/*!< in: TRUE=lock data dictionary and commit */
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{
	int	error;
	char*	norm_to;
	char*	norm_from;

7323
	srv_lower_case_table_names = lower_case_table_names;
7324 7325 7326 7327 7328

	// Magic number 64 arbitrary
	norm_to = (char*) my_malloc(strlen(to) + 64, MYF(0));
	norm_from = (char*) my_malloc(strlen(from) + 64, MYF(0));

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	normalize_table_name(norm_to, to);
	normalize_table_name(norm_from, from);
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	/* Serialize data dictionary operations with dictionary mutex:
	no deadlocks can occur then in these operations */

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	if (lock_and_commit) {
		row_mysql_lock_data_dictionary(trx);
	}
7338 7339

	error = row_rename_table_for_mysql(
7340
		norm_from, norm_to, trx, lock_and_commit);
7341 7342 7343 7344

	if (error != DB_SUCCESS) {
		FILE* ef = dict_foreign_err_file;

7345 7346
		fputs("InnoDB: Renaming table ", ef);
		ut_print_name(ef, trx, TRUE, norm_from);
7347
		fputs(" to ", ef);
7348
		ut_print_name(ef, trx, TRUE, norm_to);
7349 7350 7351
		fputs(" failed!\n", ef);
	}

7352 7353
	if (lock_and_commit) {
		row_mysql_unlock_data_dictionary(trx);
7354

7355 7356 7357
		/* Flush the log to reduce probability that the .frm
		files and the InnoDB data dictionary get out-of-sync
		if the user runs with innodb_flush_log_at_trx_commit = 0 */
7358

7359 7360
		log_buffer_flush_to_disk();
	}
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7361

7362 7363
	my_free(norm_to);
	my_free(norm_from);
7364 7365 7366

	return error;
}
7367
/*********************************************************************//**
7368 7369
Renames an InnoDB table.
@return	0 or error code */
7370
UNIV_INTERN
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7371 7372 7373
int
ha_innobase::rename_table(
/*======================*/
7374 7375
	const char*	from,	/*!< in: old name of the table */
	const char*	to)	/*!< in: new name of the table */
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7376
{
7377
	trx_t*	trx;
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7378 7379
	int	error;
	trx_t*	parent_trx;
7380
	THD*	thd		= ha_thd();
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7381

7382
	DBUG_ENTER("ha_innobase::rename_table");
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7383 7384 7385

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7386

7387
	parent_trx = check_trx_exists(thd);
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7388 7389 7390 7391

	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

7392
	trx_search_latch_release_if_reserved(parent_trx);
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7393

7394
	trx = innobase_trx_allocate(thd);
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7395

7396
	error = innobase_rename_table(trx, from, to, TRUE);
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	/* Tell the InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

7403 7404
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
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7405

7406 7407 7408 7409 7410 7411 7412 7413 7414 7415 7416 7417 7418 7419 7420 7421 7422 7423
	/* Add a special case to handle the Duplicated Key error
	and return DB_ERROR instead.
	This is to avoid a possible SIGSEGV error from mysql error
	handling code. Currently, mysql handles the Duplicated Key
	error by re-entering the storage layer and getting dup key
	info by calling get_dup_key(). This operation requires a valid
	table handle ('row_prebuilt_t' structure) which could no
	longer be available in the error handling stage. The suggested
	solution is to report a 'table exists' error message (since
	the dup key error here is due to an existing table whose name
	is the one we are trying to rename to) and return the generic
	error code. */
	if (error == (int) DB_DUPLICATE_KEY) {
		my_error(ER_TABLE_EXISTS_ERROR, MYF(0), to);

		error = DB_ERROR;
	}

7424
	error = convert_error_code_to_mysql(error, 0, NULL);
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	DBUG_RETURN(error);
}

7429
/*********************************************************************//**
7430 7431
Estimates the number of index records in a range.
@return	estimated number of rows */
7432
UNIV_INTERN
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7433 7434 7435
ha_rows
ha_innobase::records_in_range(
/*==========================*/
7436 7437
	uint			keynr,		/*!< in: index number */
	key_range		*min_key,	/*!< in: start key value of the
7438
						   range, may also be 0 */
7439
	key_range		*max_key)	/*!< in: range end key val, may
7440
						   also be 0 */
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{
	KEY*		key;
	dict_index_t*	index;
7444
	uchar*		key_val_buff2	= (uchar*) my_malloc(
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7445
						  table->s->reclength
7446
					+ table->s->max_key_length + 100,
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7447 7448
								MYF(MY_FAE));
	ulint		buff2_len = table->s->reclength
7449
					+ table->s->max_key_length + 100;
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	dtuple_t*	range_start;
	dtuple_t*	range_end;
7452
	ib_int64_t	n_rows;
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7453 7454
	ulint		mode1;
	ulint		mode2;
7455
	mem_heap_t*	heap;
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7456

7457
	DBUG_ENTER("records_in_range");
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7458

7459
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
7460

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	prebuilt->trx->op_info = (char*)"estimating records in index range";

	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	trx_search_latch_release_if_reserved(prebuilt->trx);

	active_index = keynr;

	key = table->key_info + active_index;

7472
	index = innobase_get_index(keynr);
7473

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	/* There exists possibility of not being able to find requested
	index due to inconsistency between MySQL and InoDB dictionary info.
	Necessary message should have been printed in innobase_get_index() */
	if (UNIV_UNLIKELY(!index)) {
		n_rows = HA_POS_ERROR;
		goto func_exit;
	}
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	if (UNIV_UNLIKELY(!row_merge_is_index_usable(prebuilt->trx, index))) {
		n_rows = HA_ERR_TABLE_DEF_CHANGED;
		goto func_exit;
	}
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7486 7487 7488 7489
	heap = mem_heap_create(2 * (key->key_parts * sizeof(dfield_t)
				    + sizeof(dtuple_t)));

	range_start = dtuple_create(heap, key->key_parts);
7490
	dict_index_copy_types(range_start, index, key->key_parts);
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7491

7492
	range_end = dtuple_create(heap, key->key_parts);
7493
	dict_index_copy_types(range_end, index, key->key_parts);
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7494 7495 7496 7497 7498 7499

	row_sel_convert_mysql_key_to_innobase(
				range_start, (byte*) key_val_buff,
				(ulint)upd_and_key_val_buff_len,
				index,
				(byte*) (min_key ? min_key->key :
7500
					 (const uchar*) 0),
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				(ulint) (min_key ? min_key->length : 0),
				prebuilt->trx);

	row_sel_convert_mysql_key_to_innobase(
				range_end, (byte*) key_val_buff2,
				buff2_len, index,
				(byte*) (max_key ? max_key->key :
7508
					 (const uchar*) 0),
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				(ulint) (max_key ? max_key->length : 0),
				prebuilt->trx);

	mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag :
7513
						HA_READ_KEY_EXACT);
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7514
	mode2 = convert_search_mode_to_innobase(max_key ? max_key->flag :
7515
						HA_READ_KEY_EXACT);
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7516

7517 7518 7519 7520 7521 7522 7523
	if (mode1 != PAGE_CUR_UNSUPP && mode2 != PAGE_CUR_UNSUPP) {

		n_rows = btr_estimate_n_rows_in_range(index, range_start,
						      mode1, range_end,
						      mode2);
	} else {

7524
		n_rows = HA_POS_ERROR;
7525 7526
	}

7527
	mem_heap_free(heap);
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7528

7529
func_exit:
7530
	my_free(key_val_buff2);
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	prebuilt->trx->op_info = (char*)"";

	/* The MySQL optimizer seems to believe an estimate of 0 rows is
	always accurate and may return the result 'Empty set' based on that.
	The accuracy is not guaranteed, and even if it were, for a locking
	read we should anyway perform the search to set the next-key lock.
	Add 1 to the value to make sure MySQL does not make the assumption! */

	if (n_rows == 0) {
7541
		n_rows = 1;
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	}

	DBUG_RETURN((ha_rows) n_rows);
}

7547
/*********************************************************************//**
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7548
Gives an UPPER BOUND to the number of rows in a table. This is used in
7549 7550
filesort.cc.
@return	upper bound of rows */
7551
UNIV_INTERN
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ha_rows
ha_innobase::estimate_rows_upper_bound(void)
/*======================================*/
{
	dict_index_t*	index;
	ulonglong	estimate;
	ulonglong	local_data_file_length;
7559
	ulint		stat_n_leaf_pages;
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7560

7561
	DBUG_ENTER("estimate_rows_upper_bound");
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7562 7563 7564 7565 7566

	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

7567
	update_thd(ha_thd());
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7568 7569

	prebuilt->trx->op_info = (char*)
7570
				 "calculating upper bound for table rows";
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	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	trx_search_latch_release_if_reserved(prebuilt->trx);

7577
	index = dict_table_get_first_index(prebuilt->table);
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7578

7579 7580 7581
	stat_n_leaf_pages = index->stat_n_leaf_pages;

	ut_a(stat_n_leaf_pages > 0);
7582 7583

	local_data_file_length =
7584
		((ulonglong) stat_n_leaf_pages) * UNIV_PAGE_SIZE;
7585

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	/* Calculate a minimum length for a clustered index record and from
	that an upper bound for the number of rows. Since we only calculate
	new statistics in row0mysql.c when a table has grown by a threshold
	factor, we must add a safety factor 2 in front of the formula below. */

	estimate = 2 * local_data_file_length /
					 dict_index_calc_min_rec_len(index);

	prebuilt->trx->op_info = (char*)"";

	DBUG_RETURN((ha_rows) estimate);
}

7600
/*********************************************************************//**
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7601 7602
How many seeks it will take to read through the table. This is to be
comparable to the number returned by records_in_range so that we can
7603 7604
decide if we should scan the table or use keys.
@return	estimated time measured in disk seeks */
7605
UNIV_INTERN
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double
ha_innobase::scan_time()
/*====================*/
{
	/* Since MySQL seems to favor table scans too much over index
	searches, we pretend that a sequential read takes the same time
	as a random disk read, that is, we do not divide the following
	by 10, which would be physically realistic. */
7614

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	return((double) (prebuilt->table->stat_clustered_index_size));
}

7618
/******************************************************************//**
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7619
Calculate the time it takes to read a set of ranges through an index
7620 7621
This enables us to optimise reads for clustered indexes.
@return	estimated time measured in disk seeks */
7622
UNIV_INTERN
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double
ha_innobase::read_time(
/*===================*/
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	uint	index,	/*!< in: key number */
	uint	ranges,	/*!< in: how many ranges */
	ha_rows rows)	/*!< in: estimated number of rows in the ranges */
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7629 7630
{
	ha_rows total_rows;
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	double	time_for_scan;

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	if (index != table->s->primary_key) {
7634 7635
		/* Not clustered */
		return(handler::read_time(index, ranges, rows));
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	}

	if (rows <= 2) {

		return((double) rows);
	}

	/* Assume that the read time is proportional to the scan time for all
	rows + at most one seek per range. */

	time_for_scan = scan_time();

	if ((total_rows = estimate_rows_upper_bound()) < rows) {

7650
		return(time_for_scan);
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	}

	return(ranges + (double) rows / (double) total_rows * time_for_scan);
}

7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677 7678 7679 7680 7681 7682 7683
/*********************************************************************//**
Calculates the key number used inside MySQL for an Innobase index. We will
first check the "index translation table" for a match of the index to get
the index number. If there does not exist an "index translation table",
or not able to find the index in the translation table, then we will fall back
to the traditional way of looping through dict_index_t list to find a
match. In this case, we have to take into account if we generated a
default clustered index for the table
@return the key number used inside MySQL */
static
unsigned int
innobase_get_mysql_key_number_for_index(
/*====================================*/
	INNOBASE_SHARE*		share,	/*!< in: share structure for index
					translation table. */
	const TABLE*		table,	/*!< in: table in MySQL data
					dictionary */
	dict_table_t*		ib_table,/*!< in: table in Innodb data
					dictionary */
        const dict_index_t*     index)	/*!< in: index */
{
	const dict_index_t*	ind;
	unsigned int		i;

        ut_a(index);

	/* If index does not belong to the table of share structure. Search
	index->table instead */
7684
	if (index->table != ib_table) {
7685 7686 7687 7688 7689 7690 7691 7692 7693 7694 7695 7696 7697 7698 7699 7700 7701 7702 7703 7704 7705 7706 7707 7708 7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731 7732
		i = 0;
		ind = dict_table_get_first_index(index->table);

		while (index != ind) {
			ind = dict_table_get_next_index(ind);
			i++;
		}

		if (row_table_got_default_clust_index(index->table)) {
			ut_a(i > 0);
			i--;
		}

		return(i);
	}

	/* If index translation table exists, we will first check
	the index through index translation table for a match. */
        if (share->idx_trans_tbl.index_mapping) {
		for (i = 0; i < share->idx_trans_tbl.index_count; i++) {
			if (share->idx_trans_tbl.index_mapping[i] == index) {
				return(i);
			}
		}

		/* Print an error message if we cannot find the index
		** in the "index translation table". */
		sql_print_error("Cannot find index %s in InnoDB index "
				"translation table.", index->name);
	}

	/* If we do not have an "index translation table", or not able
	to find the index in the translation table, we'll directly find
	matching index with information from mysql TABLE structure and
	InnoDB dict_index_t list */
	for (i = 0; i < table->s->keys; i++) {
		ind = dict_table_get_index_on_name(
			ib_table, table->key_info[i].name);

		if (index == ind) {
			return(i);
		}
        }

	ut_error;

        return(0);
}
7733 7734

/*********************************************************************//**
7735
Calculate Record Per Key value. Need to exclude the NULL value if
7736 7737
innodb_stats_method is set to "nulls_ignored"
@return estimated record per key value */
7738 7739 7740 7741
static
ha_rows
innodb_rec_per_key(
/*===============*/
7742 7743
	dict_index_t*	index,		/*!< in: dict_index_t structure */
	ulint		i,		/*!< in: the column we are
7744
					calculating rec per key */
7745
	ha_rows		records)	/*!< in: estimated total records */
7746 7747 7748 7749 7750 7751 7752 7753 7754 7755 7756
{
	ha_rows		rec_per_key;

	ut_ad(i < dict_index_get_n_unique(index));

	/* Note the stat_n_diff_key_vals[] stores the diff value with
	n-prefix indexing, so it is always stat_n_diff_key_vals[i + 1] */
	if (index->stat_n_diff_key_vals[i + 1] == 0) {

		rec_per_key = records;
	} else if (srv_innodb_stats_method == SRV_STATS_NULLS_IGNORED) {
7757
		ib_int64_t	num_null;
7758 7759 7760 7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771

		/* Number of rows with NULL value in this
		field */
		num_null = records - index->stat_n_non_null_key_vals[i];

		/* In theory, index->stat_n_non_null_key_vals[i]
		should always be less than the number of records.
		Since this is statistics value, the value could
		have slight discrepancy. But we will make sure
		the number of null values is not a negative number. */
		num_null = (num_null < 0) ? 0 : num_null;

		/* If the number of NULL values is the same as or
		large than that of the distinct values, we could
7772
		consider that the table consists mostly of NULL value. 
7773 7774 7775 7776 7777 7778 7779 7780 7781 7782 7783 7784 7785 7786 7787 7788 7789 7790 7791
		Set rec_per_key to 1. */
		if (index->stat_n_diff_key_vals[i + 1] <= num_null) {
			rec_per_key = 1;
		} else {
			/* Need to exclude rows with NULL values from
			rec_per_key calculation */
			rec_per_key = (ha_rows)(
				(records - num_null)
				/ (index->stat_n_diff_key_vals[i + 1]
				   - num_null));
		}
	} else {
		rec_per_key = (ha_rows)
			 (records / index->stat_n_diff_key_vals[i + 1]);
	}

	return(rec_per_key);
}

7792
/*********************************************************************//**
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7793 7794
Returns statistics information of the table to the MySQL interpreter,
in various fields of the handle object. */
7795
UNIV_INTERN
7796
int
7797 7798
ha_innobase::info_low(
/*==================*/
7799
	uint	flag,			/*!< in: what information MySQL
7800 7801 7802
					requests */
	bool	called_from_analyze)	/* in: TRUE if called from
					::analyze() */
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7803 7804 7805 7806
{
	dict_table_t*	ib_table;
	dict_index_t*	index;
	ha_rows		rec_per_key;
7807
	ib_int64_t	n_rows;
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7808
	char		path[FN_REFLEN];
7809
	os_file_stat_t	stat_info;
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7810

7811
	DBUG_ENTER("info");
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7812

7813
	/* If we are forcing recovery at a high level, we will suppress
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7814 7815 7816 7817 7818 7819 7820
	statistics calculation on tables, because that may crash the
	server if an index is badly corrupted. */

	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

7821
	update_thd(ha_thd());
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7822 7823 7824 7825 7826 7827 7828 7829

	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	prebuilt->trx->op_info = (char*)"returning various info to MySQL";

	trx_search_latch_release_if_reserved(prebuilt->trx);

7830
	ib_table = prebuilt->table;
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7831

7832
	if (flag & HA_STATUS_TIME) {
7833
		if (called_from_analyze || innobase_stats_on_metadata) {
7834 7835
			/* In sql_show we call with this flag: update
			then statistics so that they are up-to-date */
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7836

7837
			prebuilt->trx->op_info = "updating table statistics";
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7838

7839 7840 7841
			dict_update_statistics(ib_table,
					       FALSE /* update even if stats
						     are initialized */);
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7842

7843
			prebuilt->trx->op_info = "returning various info to MySQL";
7844
		}
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7845

7846
		my_snprintf(path, sizeof(path), "%s/%s%s",
7847 7848
				mysql_data_home, ib_table->name, reg_ext);

7849
		unpack_filename(path,path);
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7850

7851
		/* Note that we do not know the access time of the table,
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7852 7853 7854
		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */

		if (os_file_get_status(path,&stat_info)) {
7855
			stats.create_time = (ulong) stat_info.ctime;
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7856
		}
7857
	}
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7858 7859

	if (flag & HA_STATUS_VARIABLE) {
7860 7861 7862

		dict_table_stats_lock(ib_table, RW_S_LATCH);

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		n_rows = ib_table->stat_n_rows;

		/* Because we do not protect stat_n_rows by any mutex in a
		delete, it is theoretically possible that the value can be
		smaller than zero! TODO: fix this race.

		The MySQL optimizer seems to assume in a left join that n_rows
		is an accurate estimate if it is zero. Of course, it is not,
		since we do not have any locks on the rows yet at this phase.
		Since SHOW TABLE STATUS seems to call this function with the
		HA_STATUS_TIME flag set, while the left join optimizer does not
		set that flag, we add one to a zero value if the flag is not
		set. That way SHOW TABLE STATUS will show the best estimate,
		while the optimizer never sees the table empty. */

		if (n_rows < 0) {
			n_rows = 0;
		}

		if (n_rows == 0 && !(flag & HA_STATUS_TIME)) {
			n_rows++;
		}

7886 7887 7888 7889
		/* Fix bug#40386: Not flushing query cache after truncate.
		n_rows can not be 0 unless the table is empty, set to 1
		instead. The original problem of bug#29507 is actually
		fixed in the server code. */
7890 7891
		if (thd_sql_command(user_thd) == SQLCOM_TRUNCATE) {

7892
			n_rows = 1;
7893 7894 7895 7896 7897 7898 7899

			/* We need to reset the prebuilt value too, otherwise
			checks for values greater than the last value written
			to the table will fail and the autoinc counter will
			not be updated. This will force write_row() into
			attempting an update of the table's AUTOINC counter. */

7900
			prebuilt->autoinc_last_value = 0;
7901 7902
		}

7903 7904 7905
		stats.records = (ha_rows)n_rows;
		stats.deleted = 0;
		stats.data_file_length = ((ulonglong)
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7906
				ib_table->stat_clustered_index_size)
7907
					* UNIV_PAGE_SIZE;
7908
		stats.index_file_length = ((ulonglong)
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7909
				ib_table->stat_sum_of_other_index_sizes)
7910
					* UNIV_PAGE_SIZE;
7911

7912 7913
		dict_table_stats_unlock(ib_table, RW_S_LATCH);

7914 7915 7916 7917
		/* Since fsp_get_available_space_in_free_extents() is
		acquiring latches inside InnoDB, we do not call it if we
		are asked by MySQL to avoid locking. Another reason to
		avoid the call is that it uses quite a lot of CPU.
7918
		See Bug#38185. */
7919 7920
		if (flag & HA_STATUS_NO_LOCK
		    || !(flag & HA_STATUS_VARIABLE_EXTRA)) {
7921 7922 7923
			/* We do not update delete_length if no
			locking is requested so the "old" value can
			remain. delete_length is initialized to 0 in
7924
			the ha_statistics' constructor. Also we only
7925 7926
			need delete_length to be set when
			HA_STATUS_VARIABLE_EXTRA is set */
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		} else if (UNIV_UNLIKELY
			   (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE)) {
			/* Avoid accessing the tablespace if
			innodb_crash_recovery is set to a high value. */
			stats.delete_length = 0;
		} else {
7933
			ullint	avail_space;
7934

7935
			avail_space = fsp_get_available_space_in_free_extents(
7936
				ib_table->space);
7937

7938
			if (avail_space == ULLINT_UNDEFINED) {
7939 7940 7941 7942 7943 7944 7945 7946 7947 7948 7949 7950 7951 7952 7953
				THD*	thd;

				thd = ha_thd();

				push_warning_printf(
					thd,
					MYSQL_ERROR::WARN_LEVEL_WARN,
					ER_CANT_GET_STAT,
					"InnoDB: Trying to get the free "
					"space for table %s but its "
					"tablespace has been discarded or "
					"the .ibd file is missing. Setting "
					"the free space to zero.",
					ib_table->name);

7954
				stats.delete_length = 0;
7955 7956
			} else {
				stats.delete_length = avail_space * 1024;
7957
			}
7958 7959
		}

7960
		stats.check_time = 0;
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7961

7962 7963
		if (stats.records == 0) {
			stats.mean_rec_length = 0;
7964
		} else {
7965
			stats.mean_rec_length = (ulong) (stats.data_file_length / stats.records);
7966 7967
		}
	}
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7968 7969

	if (flag & HA_STATUS_CONST) {
7970
		ulong	i;
7971 7972 7973 7974 7975 7976 7977 7978 7979 7980 7981 7982 7983
		/* Verify the number of index in InnoDB and MySQL
		matches up. If prebuilt->clust_index_was_generated
		holds, InnoDB defines GEN_CLUST_INDEX internally */
		ulint	num_innodb_index = UT_LIST_GET_LEN(ib_table->indexes)
					- prebuilt->clust_index_was_generated;

		if (table->s->keys != num_innodb_index) {
			sql_print_error("Table %s contains %lu "
					"indexes inside InnoDB, which "
					"is different from the number of "
					"indexes %u defined in the MySQL ",
					ib_table->name, num_innodb_index,
					table->s->keys);
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7984 7985
		}

7986 7987
		dict_table_stats_lock(ib_table, RW_S_LATCH);

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7988
		for (i = 0; i < table->s->keys; i++) {
7989
			ulong	j;
7990 7991 7992 7993 7994 7995 7996
			/* We could get index quickly through internal
			index mapping with the index translation table.
			The identity of index (match up index name with
			that of table->key_info[i]) is already verified in
			innobase_get_index().  */
			index = innobase_get_index(i);

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7997
			if (index == NULL) {
7998
				sql_print_error("Table %s contains fewer "
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7999 8000 8001 8002
						"indexes inside InnoDB than "
						"are defined in the MySQL "
						".frm file. Have you mixed up "
						".frm files from different "
8003
						"installations? See "
8004 8005
						REFMAN
						"innodb-troubleshooting.html\n",
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8006 8007 8008 8009 8010 8011 8012
						ib_table->name);
				break;
			}

			for (j = 0; j < table->key_info[i].key_parts; j++) {

				if (j + 1 > index->n_uniq) {
8013 8014 8015 8016
					sql_print_error(
"Index %s of %s has %lu columns unique inside InnoDB, but MySQL is asking "
"statistics for %lu columns. Have you mixed up .frm files from different "
"installations? "
8017
"See " REFMAN "innodb-troubleshooting.html\n",
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8018 8019 8020 8021
							index->name,
							ib_table->name,
							(unsigned long)
							index->n_uniq, j + 1);
8022
					break;
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8023 8024
				}

8025 8026
				rec_per_key = innodb_rec_per_key(
					index, j, stats.records);
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				/* Since MySQL seems to favor table scans
				too much over index searches, we pretend
				index selectivity is 2 times better than
				our estimate: */

				rec_per_key = rec_per_key / 2;

				if (rec_per_key == 0) {
					rec_per_key = 1;
				}

8039
				table->key_info[i].rec_per_key[j]=
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8040
				  rec_per_key >= ~(ulong) 0 ? ~(ulong) 0 :
8041
				  (ulong) rec_per_key;
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8042 8043
			}
		}
8044 8045

		dict_table_stats_unlock(ib_table, RW_S_LATCH);
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8046 8047
	}

8048 8049 8050 8051 8052
	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {

		goto func_exit;
	}

8053
	if (flag & HA_STATUS_ERRKEY) {
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8054
		const dict_index_t*	err_index;
8055

8056 8057
		ut_a(prebuilt->trx);
		ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
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8058

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marko committed
8059
		err_index = trx_get_error_info(prebuilt->trx);
8060 8061

		if (err_index) {
8062 8063
			errkey = innobase_get_mysql_key_number_for_index(
					share, table, ib_table, err_index);
8064 8065 8066
		} else {
			errkey = (unsigned int) prebuilt->trx->error_key_num;
		}
8067
	}
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8068

8069 8070
	if ((flag & HA_STATUS_AUTO) && table->found_next_number_field) {
		stats.auto_increment_value = innobase_peek_autoinc();
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8071 8072
	}

8073
func_exit:
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8074 8075
	prebuilt->trx->op_info = (char*)"";

8076
	DBUG_RETURN(0);
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8077 8078
}

8079
/*********************************************************************//**
8080 8081
Returns statistics information of the table to the MySQL interpreter,
in various fields of the handle object. */
8082
UNIV_INTERN
8083 8084 8085
int
ha_innobase::info(
/*==============*/
8086
	uint	flag)	/*!< in: what information MySQL requests */
8087 8088 8089 8090
{
	return(info_low(flag, false /* not called from analyze */));
}

8091
/**********************************************************************//**
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8092
Updates index cardinalities of the table, based on 8 random dives into
8093 8094
each index tree. This does NOT calculate exact statistics on the table.
@return	returns always 0 (success) */
8095
UNIV_INTERN
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8096 8097
int
ha_innobase::analyze(
8098
/*=================*/
8099 8100
	THD*		thd,		/*!< in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: currently ignored */
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8101 8102
{
	/* Simply call ::info() with all the flags */
8103 8104
	info_low(HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE,
		 true /* called from analyze */);
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8105 8106 8107 8108

	return(0);
}

8109
/**********************************************************************//**
8110
This is mapped to "ALTER TABLE tablename ENGINE=InnoDB", which rebuilds
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8111
the table in MySQL. */
8112
UNIV_INTERN
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8113 8114 8115
int
ha_innobase::optimize(
/*==================*/
8116 8117
	THD*		thd,		/*!< in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: currently ignored */
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8118
{
8119
	return(HA_ADMIN_TRY_ALTER);
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8120 8121
}

8122
/*******************************************************************//**
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8123 8124
Tries to check that an InnoDB table is not corrupted. If corruption is
noticed, prints to stderr information about it. In case of corruption
8125 8126
may also assert a failure and crash the server.
@return	HA_ADMIN_CORRUPT or HA_ADMIN_OK */
8127
UNIV_INTERN
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8128 8129 8130
int
ha_innobase::check(
/*===============*/
8131 8132
	THD*		thd,		/*!< in: user thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: check options, currently
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8133 8134
					ignored */
{
8135 8136 8137 8138 8139
	dict_index_t*	index;
	ulint		n_rows;
	ulint		n_rows_in_table	= ULINT_UNDEFINED;
	ibool		is_ok		= TRUE;
	ulint		old_isolation_level;
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8140

8141
	DBUG_ENTER("ha_innobase::check");
8142
	DBUG_ASSERT(thd == ha_thd());
8143 8144
	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
8145
	ut_a(prebuilt->trx == thd_to_trx(thd));
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8146 8147 8148 8149 8150 8151 8152 8153

	if (prebuilt->mysql_template == NULL) {
		/* Build the template; we will use a dummy template
		in index scans done in checking */

		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
	}

8154 8155 8156 8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170
	if (prebuilt->table->ibd_file_missing) {
		sql_print_error("InnoDB: Error:\n"
			"InnoDB: MySQL is trying to use a table handle"
			" but the .ibd file for\n"
			"InnoDB: table %s does not exist.\n"
			"InnoDB: Have you deleted the .ibd file"
			" from the database directory under\n"
			"InnoDB: the MySQL datadir, or have you"
			" used DISCARD TABLESPACE?\n"
			"InnoDB: Please refer to\n"
			"InnoDB: " REFMAN "innodb-troubleshooting.html\n"
			"InnoDB: how you can resolve the problem.\n",
			prebuilt->table->name);
		DBUG_RETURN(HA_ADMIN_CORRUPT);
	}

	prebuilt->trx->op_info = "checking table";
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8171

8172 8173 8174 8175 8176 8177 8178 8179 8180 8181 8182 8183 8184 8185 8186 8187 8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201 8202 8203 8204 8205 8206 8207 8208 8209 8210 8211 8212 8213 8214 8215 8216 8217 8218 8219 8220 8221 8222 8223 8224 8225 8226 8227 8228 8229 8230 8231 8232 8233 8234 8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246 8247 8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260 8261 8262 8263 8264 8265 8266 8267 8268 8269 8270 8271 8272 8273 8274 8275 8276 8277 8278 8279 8280 8281 8282 8283
	old_isolation_level = prebuilt->trx->isolation_level;

	/* We must run the index record counts at an isolation level
	>= READ COMMITTED, because a dirty read can see a wrong number
	of records in some index; to play safe, we use always
	REPEATABLE READ here */

	prebuilt->trx->isolation_level = TRX_ISO_REPEATABLE_READ;

	/* Enlarge the fatal lock wait timeout during CHECK TABLE. */
	mutex_enter(&kernel_mutex);
	srv_fatal_semaphore_wait_threshold += 7200; /* 2 hours */
	mutex_exit(&kernel_mutex);

	for (index = dict_table_get_first_index(prebuilt->table);
	     index != NULL;
	     index = dict_table_get_next_index(index)) {
#if 0
		fputs("Validating index ", stderr);
		ut_print_name(stderr, trx, FALSE, index->name);
		putc('\n', stderr);
#endif

		if (!btr_validate_index(index, prebuilt->trx)) {
			is_ok = FALSE;
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_NOT_KEYFILE,
					    "InnoDB: The B-tree of"
					    " index '%-.200s' is corrupted.",
					    index->name);
			continue;
		}

		/* Instead of invoking change_active_index(), set up
		a dummy template for non-locking reads, disabling
		access to the clustered index. */
		prebuilt->index = index;

		prebuilt->index_usable = row_merge_is_index_usable(
			prebuilt->trx, prebuilt->index);

		if (UNIV_UNLIKELY(!prebuilt->index_usable)) {
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					    HA_ERR_TABLE_DEF_CHANGED,
					    "InnoDB: Insufficient history for"
					    " index '%-.200s'",
					    index->name);
			continue;
		}

		prebuilt->sql_stat_start = TRUE;
		prebuilt->template_type = ROW_MYSQL_DUMMY_TEMPLATE;
		prebuilt->n_template = 0;
		prebuilt->need_to_access_clustered = FALSE;

		dtuple_set_n_fields(prebuilt->search_tuple, 0);

		prebuilt->select_lock_type = LOCK_NONE;

		if (!row_check_index_for_mysql(prebuilt, index, &n_rows)) {
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_NOT_KEYFILE,
					    "InnoDB: The B-tree of"
					    " index '%-.200s' is corrupted.",
					    index->name);
			is_ok = FALSE;
		}

		if (thd_killed(user_thd)) {
			break;
		}

#if 0
		fprintf(stderr, "%lu entries in index %s\n", n_rows,
			index->name);
#endif

		if (index == dict_table_get_first_index(prebuilt->table)) {
			n_rows_in_table = n_rows;
		} else if (n_rows != n_rows_in_table) {
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_NOT_KEYFILE,
					    "InnoDB: Index '%-.200s'"
					    " contains %lu entries,"
					    " should be %lu.",
					    index->name,
					    (ulong) n_rows,
					    (ulong) n_rows_in_table);
			is_ok = FALSE;
		}
	}

	/* Restore the original isolation level */
	prebuilt->trx->isolation_level = old_isolation_level;

	/* We validate also the whole adaptive hash index for all tables
	at every CHECK TABLE */

	if (!btr_search_validate()) {
		push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
			     ER_NOT_KEYFILE,
			     "InnoDB: The adaptive hash index is corrupted.");
		is_ok = FALSE;
	}

	/* Restore the fatal lock wait timeout after CHECK TABLE. */
	mutex_enter(&kernel_mutex);
	srv_fatal_semaphore_wait_threshold -= 7200; /* 2 hours */
	mutex_exit(&kernel_mutex);

	prebuilt->trx->op_info = "";
	if (thd_killed(user_thd)) {
8284
		my_error(ER_QUERY_INTERRUPTED, MYF(0));
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8285
	}
8286 8287

	DBUG_RETURN(is_ok ? HA_ADMIN_OK : HA_ADMIN_CORRUPT);
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8288 8289
}

8290
/*************************************************************//**
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8291 8292
Adds information about free space in the InnoDB tablespace to a table comment
which is printed out when a user calls SHOW TABLE STATUS. Adds also info on
8293 8294
foreign keys.
@return	table comment + InnoDB free space + info on foreign keys */
8295
UNIV_INTERN
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char*
ha_innobase::update_table_comment(
/*==============================*/
8299
	const char*	comment)/*!< in: table comment defined by user */
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8300
{
8301 8302
	uint	length = (uint) strlen(comment);
	char*	str;
8303
	long	flen;
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	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

	if (length > 64000 - 3) {
		return((char*)comment); /* string too long */
	}

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	update_thd(ha_thd());
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	prebuilt->trx->op_info = (char*)"returning table comment";

	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	trx_search_latch_release_if_reserved(prebuilt->trx);
	str = NULL;

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	/* output the data to a temporary file */
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	mutex_enter(&srv_dict_tmpfile_mutex);
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	rewind(srv_dict_tmpfile);

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	fprintf(srv_dict_tmpfile, "InnoDB free: %llu kB",
		fsp_get_available_space_in_free_extents(
			prebuilt->table->space));
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	dict_print_info_on_foreign_keys(FALSE, srv_dict_tmpfile,
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				prebuilt->trx, prebuilt->table);
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	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	} else if (length + flen + 3 > 64000) {
		flen = 64000 - 3 - length;
	}
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	/* allocate buffer for the full string, and
	read the contents of the temporary file */
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	str = (char*) my_malloc(length + flen + 3, MYF(0));
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	if (str) {
		char* pos	= str + length;
		if (length) {
			memcpy(str, comment, length);
			*pos++ = ';';
			*pos++ = ' ';
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		}
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		rewind(srv_dict_tmpfile);
		flen = (uint) fread(pos, 1, flen, srv_dict_tmpfile);
		pos[flen] = 0;
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	}

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	mutex_exit(&srv_dict_tmpfile_mutex);
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	prebuilt->trx->op_info = (char*)"";
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	return(str ? str : (char*) comment);
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}

8365
/*******************************************************************//**
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Gets the foreign key create info for a table stored in InnoDB.
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@return own: character string in the form which can be inserted to the
CREATE TABLE statement, MUST be freed with
ha_innobase::free_foreign_key_create_info */
8370
UNIV_INTERN
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char*
ha_innobase::get_foreign_key_create_info(void)
/*==========================================*/
{
	char*	str	= 0;
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	long	flen;
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	ut_a(prebuilt != NULL);

	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

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	update_thd(ha_thd());
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	prebuilt->trx->op_info = (char*)"getting info on foreign keys";
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	/* In case MySQL calls this in the middle of a SELECT query,
	release possible adaptive hash latch to avoid
	deadlocks of threads */
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	trx_search_latch_release_if_reserved(prebuilt->trx);
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	mutex_enter(&srv_dict_tmpfile_mutex);
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	rewind(srv_dict_tmpfile);
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	/* output the data to a temporary file */
	dict_print_info_on_foreign_keys(TRUE, srv_dict_tmpfile,
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				prebuilt->trx, prebuilt->table);
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	prebuilt->trx->op_info = (char*)"";
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	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	}
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	/* allocate buffer for the string, and
	read the contents of the temporary file */
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	str = (char*) my_malloc(flen + 1, MYF(0));
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	if (str) {
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(str, 1, flen, srv_dict_tmpfile);
		str[flen] = 0;
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	}

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	mutex_exit(&srv_dict_tmpfile_mutex);
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	return(str);
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}


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/***********************************************************************//**
Maps a InnoDB foreign key constraint to a equivalent MySQL foreign key info.
@return pointer to foreign key info */
static
FOREIGN_KEY_INFO*
get_foreign_key_info(
/*=================*/
	THD*			thd,		/*!< in: user thread handle */
	dict_foreign_t*		foreign)	/*!< in: foreign key constraint */
{
	FOREIGN_KEY_INFO	f_key_info;
	FOREIGN_KEY_INFO*	pf_key_info;
	uint			i = 0;
	ulint			len;
	char			tmp_buff[NAME_LEN+1];
	char			name_buff[NAME_LEN+1];
	const char*		ptr;
	LEX_STRING*		referenced_key_name;
	LEX_STRING*		name = NULL;

	ptr = dict_remove_db_name(foreign->id);
	f_key_info.foreign_id = thd_make_lex_string(thd, 0, ptr,
						    (uint) strlen(ptr), 1);

	/* Name format: database name, '/', table name, '\0' */

	/* Referenced (parent) database name */
	len = dict_get_db_name_len(foreign->referenced_table_name);
	ut_a(len < sizeof(tmp_buff));
	ut_memcpy(tmp_buff, foreign->referenced_table_name, len);
	tmp_buff[len] = 0;

	len = filename_to_tablename(tmp_buff, name_buff, sizeof(name_buff));
	f_key_info.referenced_db = thd_make_lex_string(thd, 0, name_buff, len, 1);

	/* Referenced (parent) table name */
	ptr = dict_remove_db_name(foreign->referenced_table_name);
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	len = filename_to_tablename(ptr, name_buff, sizeof(name_buff));
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	f_key_info.referenced_table = thd_make_lex_string(thd, 0, name_buff, len, 1);

	/* Dependent (child) database name */
	len = dict_get_db_name_len(foreign->foreign_table_name);
	ut_a(len < sizeof(tmp_buff));
	ut_memcpy(tmp_buff, foreign->foreign_table_name, len);
	tmp_buff[len] = 0;

	len = filename_to_tablename(tmp_buff, name_buff, sizeof(name_buff));
	f_key_info.foreign_db = thd_make_lex_string(thd, 0, name_buff, len, 1);

	/* Dependent (child) table name */
	ptr = dict_remove_db_name(foreign->foreign_table_name);
	len = filename_to_tablename(ptr, name_buff, sizeof(name_buff));
	f_key_info.foreign_table = thd_make_lex_string(thd, 0, name_buff, len, 1);

	do {
		ptr = foreign->foreign_col_names[i];
		name = thd_make_lex_string(thd, name, ptr,
					   (uint) strlen(ptr), 1);
		f_key_info.foreign_fields.push_back(name);
		ptr = foreign->referenced_col_names[i];
		name = thd_make_lex_string(thd, name, ptr,
					   (uint) strlen(ptr), 1);
		f_key_info.referenced_fields.push_back(name);
	} while (++i < foreign->n_fields);

	if (foreign->type & DICT_FOREIGN_ON_DELETE_CASCADE) {
		len = 7;
		ptr = "CASCADE";
	} else if (foreign->type & DICT_FOREIGN_ON_DELETE_SET_NULL) {
		len = 8;
		ptr = "SET NULL";
	} else if (foreign->type & DICT_FOREIGN_ON_DELETE_NO_ACTION) {
		len = 9;
		ptr = "NO ACTION";
	} else {
		len = 8;
		ptr = "RESTRICT";
	}

	f_key_info.delete_method = thd_make_lex_string(thd,
						       f_key_info.delete_method,
						       ptr, len, 1);

	if (foreign->type & DICT_FOREIGN_ON_UPDATE_CASCADE) {
		len = 7;
		ptr = "CASCADE";
	} else if (foreign->type & DICT_FOREIGN_ON_UPDATE_SET_NULL) {
		len = 8;
		ptr = "SET NULL";
	} else if (foreign->type & DICT_FOREIGN_ON_UPDATE_NO_ACTION) {
		len = 9;
		ptr = "NO ACTION";
	} else {
		len = 8;
		ptr = "RESTRICT";
	}

	f_key_info.update_method = thd_make_lex_string(thd,
						       f_key_info.update_method,
						       ptr, len, 1);

	if (foreign->referenced_index && foreign->referenced_index->name) {
		referenced_key_name = thd_make_lex_string(thd,
					f_key_info.referenced_key_name,
					foreign->referenced_index->name,
					 (uint) strlen(foreign->referenced_index->name),
					1);
	} else {
		referenced_key_name = NULL;
	}

	f_key_info.referenced_key_name = referenced_key_name;

	pf_key_info = (FOREIGN_KEY_INFO *) thd_memdup(thd, &f_key_info,
						      sizeof(FOREIGN_KEY_INFO));

	return(pf_key_info);
}

/*******************************************************************//**
Gets the list of foreign keys in this table.
@return always 0, that is, always succeeds */
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UNIV_INTERN
8547
int
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ha_innobase::get_foreign_key_list(
/*==============================*/
	THD*			thd,		/*!< in: user thread handle */
	List<FOREIGN_KEY_INFO>*	f_key_list)	/*!< out: foreign key list */
{
	FOREIGN_KEY_INFO*	pf_key_info;
	dict_foreign_t*		foreign;

	ut_a(prebuilt != NULL);
	update_thd(ha_thd());

	prebuilt->trx->op_info = "getting list of foreign keys";

	trx_search_latch_release_if_reserved(prebuilt->trx);
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	mutex_enter(&(dict_sys->mutex));

	for (foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list);
	     foreign != NULL;
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	     foreign = UT_LIST_GET_NEXT(foreign_list, foreign)) {
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		pf_key_info = get_foreign_key_info(thd, foreign);
		if (pf_key_info) {
			f_key_list->push_back(pf_key_info);
		}
	}

	mutex_exit(&(dict_sys->mutex));

	prebuilt->trx->op_info = "";

	return(0);
}

/*******************************************************************//**
Gets the set of foreign keys where this table is the referenced table.
@return always 0, that is, always succeeds */
UNIV_INTERN
int
ha_innobase::get_parent_foreign_key_list(
/*=====================================*/
	THD*			thd,		/*!< in: user thread handle */
	List<FOREIGN_KEY_INFO>*	f_key_list)	/*!< out: foreign key list */
{
	FOREIGN_KEY_INFO*	pf_key_info;
	dict_foreign_t*		foreign;

	ut_a(prebuilt != NULL);
	update_thd(ha_thd());

	prebuilt->trx->op_info = "getting list of referencing foreign keys";

	trx_search_latch_release_if_reserved(prebuilt->trx);

	mutex_enter(&(dict_sys->mutex));

	for (foreign = UT_LIST_GET_FIRST(prebuilt->table->referenced_list);
	     foreign != NULL;
	     foreign = UT_LIST_GET_NEXT(referenced_list, foreign)) {
		pf_key_info = get_foreign_key_info(thd, foreign);
		if (pf_key_info) {
			f_key_list->push_back(pf_key_info);
		}
	}

	mutex_exit(&(dict_sys->mutex));

	prebuilt->trx->op_info = "";

	return(0);
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}

8619
/*****************************************************************//**
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Checks if ALTER TABLE may change the storage engine of the table.
Changing storage engines is not allowed for tables for which there
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are foreign key constraints (parent or child tables).
@return	TRUE if can switch engines */
8624
UNIV_INTERN
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bool
ha_innobase::can_switch_engines(void)
/*=================================*/
{
	bool	can_switch;

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	DBUG_ENTER("ha_innobase::can_switch_engines");
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	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
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	prebuilt->trx->op_info =
			"determining if there are foreign key constraints";
	row_mysql_lock_data_dictionary(prebuilt->trx);

	can_switch = !UT_LIST_GET_FIRST(prebuilt->table->referenced_list)
			&& !UT_LIST_GET_FIRST(prebuilt->table->foreign_list);

	row_mysql_unlock_data_dictionary(prebuilt->trx);
	prebuilt->trx->op_info = "";

	DBUG_RETURN(can_switch);
}

8648
/*******************************************************************//**
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Checks if a table is referenced by a foreign key. The MySQL manual states that
a REPLACE is either equivalent to an INSERT, or DELETE(s) + INSERT. Only a
delete is then allowed internally to resolve a duplicate key conflict in
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REPLACE, not an update.
@return	> 0 if referenced by a FOREIGN KEY */
8654
UNIV_INTERN
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uint
ha_innobase::referenced_by_foreign_key(void)
/*========================================*/
{
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	if (dict_table_is_referenced_by_foreign_key(prebuilt->table)) {
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		return(1);
	}

	return(0);
}

8667
/*******************************************************************//**
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Frees the foreign key create info for a table stored in InnoDB, if it is
non-NULL. */
8670
UNIV_INTERN
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void
ha_innobase::free_foreign_key_create_info(
/*======================================*/
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	char*	str)	/*!< in, own: create info string to free */
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{
	if (str) {
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		my_free(str);
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	}
}

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/*******************************************************************//**
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Tells something additional to the handler about how to do things.
@return	0 or error number */
8684
UNIV_INTERN
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int
ha_innobase::extra(
/*===============*/
	enum ha_extra_function operation)
8689
			   /*!< in: HA_EXTRA_FLUSH or some other flag */
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{
	/* Warning: since it is not sure that MySQL calls external_lock
	before calling this function, the trx field in prebuilt can be
	obsolete! */

	switch (operation) {
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		case HA_EXTRA_FLUSH:
			if (prebuilt->blob_heap) {
				row_mysql_prebuilt_free_blob_heap(prebuilt);
			}
			break;
		case HA_EXTRA_RESET_STATE:
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			reset_template(prebuilt);
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			break;
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		case HA_EXTRA_NO_KEYREAD:
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			prebuilt->read_just_key = 0;
			break;
		case HA_EXTRA_KEYREAD:
			prebuilt->read_just_key = 1;
			break;
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		case HA_EXTRA_KEYREAD_PRESERVE_FIELDS:
			prebuilt->keep_other_fields_on_keyread = 1;
			break;
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			/* IMPORTANT: prebuilt->trx can be obsolete in
			this method, because it is not sure that MySQL
			calls external_lock before this method with the
			parameters below.  We must not invoke update_thd()
			either, because the calling threads may change.
			CAREFUL HERE, OR MEMORY CORRUPTION MAY OCCUR! */
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		case HA_EXTRA_IGNORE_DUP_KEY:
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			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_IGNORE;
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			break;
		case HA_EXTRA_WRITE_CAN_REPLACE:
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			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_REPLACE;
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			break;
		case HA_EXTRA_WRITE_CANNOT_REPLACE:
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			thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_REPLACE;
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			break;
		case HA_EXTRA_NO_IGNORE_DUP_KEY:
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			thd_to_trx(ha_thd())->duplicates &=
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				~(TRX_DUP_IGNORE | TRX_DUP_REPLACE);
			break;
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		default:/* Do nothing */
			;
	}

	return(0);
}

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UNIV_INTERN
int
ha_innobase::reset()
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{
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	if (prebuilt->blob_heap) {
		row_mysql_prebuilt_free_blob_heap(prebuilt);
	}

	reset_template(prebuilt);
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	/* TODO: This should really be reset in reset_template() but for now
	it's safer to do it explicitly here. */

	/* This is a statement level counter. */
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	prebuilt->autoinc_last_value = 0;
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	return(0);
}
8758

8759
/******************************************************************//**
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MySQL calls this function at the start of each SQL statement inside LOCK
TABLES. Inside LOCK TABLES the ::external_lock method does not work to
mark SQL statement borders. Note also a special case: if a temporary table
is created inside LOCK TABLES, MySQL has not called external_lock() at all
on that table.
MySQL-5.0 also calls this before each statement in an execution of a stored
procedure. To make the execution more deterministic for binlogging, MySQL-5.0
locks all tables involved in a stored procedure with full explicit table
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locks (thd_in_lock_tables(thd) holds in store_lock()) before executing the
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procedure.
@return	0 or error code */
8771
UNIV_INTERN
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int
ha_innobase::start_stmt(
/*====================*/
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	THD*		thd,	/*!< in: handle to the user thread */
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	thr_lock_type	lock_type)
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{
	trx_t*		trx;

	update_thd(thd);

	trx = prebuilt->trx;

	/* Here we release the search latch and the InnoDB thread FIFO ticket
	if they were reserved. They should have been released already at the
	end of the previous statement, but because inside LOCK TABLES the
	lock count method does not work to mark the end of a SELECT statement,
	that may not be the case. We MUST release the search latch before an
	INSERT, for example. */

	innobase_release_stat_resources(trx);

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	/* Reset the AUTOINC statement level counter for multi-row INSERTs. */
	trx->n_autoinc_rows = 0;

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	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;
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	reset_template(prebuilt);
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	if (!prebuilt->mysql_has_locked) {
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		/* This handle is for a temporary table created inside
		this same LOCK TABLES; since MySQL does NOT call external_lock
		in this case, we must use x-row locks inside InnoDB to be
		prepared for an update of a row */

		prebuilt->select_lock_type = LOCK_X;

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	} else if (trx->isolation_level != TRX_ISO_SERIALIZABLE
		   && thd_sql_command(thd) == SQLCOM_SELECT
		   && lock_type == TL_READ) {
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		/* For other than temporary tables, we obtain
		no lock for consistent read (plain SELECT). */
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		prebuilt->select_lock_type = LOCK_NONE;
	} else {
		/* Not a consistent read: restore the
		select_lock_type value. The value of
		stored_select_lock_type was decided in:
		1) ::store_lock(),
		2) ::external_lock(),
		3) ::init_table_handle_for_HANDLER(), and
		4) ::transactional_table_lock(). */
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		prebuilt->select_lock_type = prebuilt->stored_select_lock_type;
	}
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	*trx->detailed_error = 0;
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	innobase_register_trx(ht, thd, trx);
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	return(0);
}

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/******************************************************************//**
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Maps a MySQL trx isolation level code to the InnoDB isolation level code
@return	InnoDB isolation level */
8838
static inline
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ulint
innobase_map_isolation_level(
/*=========================*/
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	enum_tx_isolation	iso)	/*!< in: MySQL isolation level code */
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{
	switch(iso) {
		case ISO_REPEATABLE_READ: return(TRX_ISO_REPEATABLE_READ);
		case ISO_READ_COMMITTED: return(TRX_ISO_READ_COMMITTED);
		case ISO_SERIALIZABLE: return(TRX_ISO_SERIALIZABLE);
		case ISO_READ_UNCOMMITTED: return(TRX_ISO_READ_UNCOMMITTED);
		default: ut_a(0); return(0);
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	}
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}
8852

8853
/******************************************************************//**
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As MySQL will execute an external lock for every new table it uses when it
starts to process an SQL statement (an exception is when MySQL calls
start_stmt for the handle) we can use this function to store the pointer to
the THD in the handle. We will also use this function to communicate
to InnoDB that a new SQL statement has started and that we must store a
savepoint to our transaction handle, so that we are able to roll back
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the SQL statement in case of an error.
@return	0 */
8862
UNIV_INTERN
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int
ha_innobase::external_lock(
/*=======================*/
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	THD*	thd,		/*!< in: handle to the user thread */
	int	lock_type)	/*!< in: lock type */
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{
	trx_t*		trx;

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	DBUG_ENTER("ha_innobase::external_lock");
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	DBUG_PRINT("enter",("lock_type: %d", lock_type));

	update_thd(thd);

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	/* Statement based binlogging does not work in isolation level
	READ UNCOMMITTED and READ COMMITTED since the necessary
	locks cannot be taken. In this case, we print an
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	informative error message and return with an error.
	Note: decide_logging_format would give the same error message,
	except it cannot give the extra details. */
	if (lock_type == F_WRLCK
	    && !(table_flags() & HA_BINLOG_STMT_CAPABLE)
	    && thd_binlog_format(thd) == BINLOG_FORMAT_STMT
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	    && thd_binlog_filter_ok(thd)
            && thd_sqlcom_can_generate_row_events(thd))
        {
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		int skip = 0;
		/* used by test case */
		DBUG_EXECUTE_IF("no_innodb_binlog_errors", skip = 1;);
		if (!skip) {
			my_error(ER_BINLOG_STMT_MODE_AND_ROW_ENGINE, MYF(0),
			         " InnoDB is limited to row-logging when "
			         "transaction isolation level is "
			         "READ COMMITTED or READ UNCOMMITTED.");
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			DBUG_RETURN(HA_ERR_LOGGING_IMPOSSIBLE);
		}
	}


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	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

8906
	reset_template(prebuilt);
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	if (lock_type == F_WRLCK) {

		/* If this is a SELECT, then it is in UPDATE TABLE ...
		or SELECT ... FOR UPDATE */
		prebuilt->select_lock_type = LOCK_X;
		prebuilt->stored_select_lock_type = LOCK_X;
	}

	if (lock_type != F_UNLCK) {
		/* MySQL is setting a new table lock */

8919
		*trx->detailed_error = 0;
8920

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		innobase_register_trx(ht, thd, trx);
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		if (trx->isolation_level == TRX_ISO_SERIALIZABLE
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		    && prebuilt->select_lock_type == LOCK_NONE
		    && thd_test_options(
			    thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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			/* To get serializable execution, we let InnoDB
			conceptually add 'LOCK IN SHARE MODE' to all SELECTs
			which otherwise would have been consistent reads. An
			exception is consistent reads in the AUTOCOMMIT=1 mode:
			we know that they are read-only transactions, and they
			can be serialized also if performed as consistent
			reads. */

			prebuilt->select_lock_type = LOCK_S;
			prebuilt->stored_select_lock_type = LOCK_S;
		}

		/* Starting from 4.1.9, no InnoDB table lock is taken in LOCK
		TABLES if AUTOCOMMIT=1. It does not make much sense to acquire
		an InnoDB table lock if it is released immediately at the end
		of LOCK TABLES, and InnoDB's table locks in that case cause
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		VERY easily deadlocks.
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		We do not set InnoDB table locks if user has not explicitly
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		requested a table lock. Note that thd_in_lock_tables(thd)
		can hold in some cases, e.g., at the start of a stored
8949
		procedure call (SQLCOM_CALL). */
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		if (prebuilt->select_lock_type != LOCK_NONE) {

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			if (thd_sql_command(thd) == SQLCOM_LOCK_TABLES
			    && THDVAR(thd, table_locks)
			    && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT)
8956
			    && thd_in_lock_tables(thd)) {
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8957

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				ulint	error = row_lock_table_for_mysql(
					prebuilt, NULL, 0);
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				if (error != DB_SUCCESS) {
					error = convert_error_code_to_mysql(
8963
						(int) error, 0, thd);
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					DBUG_RETURN((int) error);
				}
			}

8968
			trx->mysql_n_tables_locked++;
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		}

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		trx->n_mysql_tables_in_use++;
		prebuilt->mysql_has_locked = TRUE;

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		DBUG_RETURN(0);
	}

	/* MySQL is releasing a table lock */

	trx->n_mysql_tables_in_use--;
	prebuilt->mysql_has_locked = FALSE;

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	/* Release a possible FIFO ticket and search latch. Since we
	may reserve the kernel mutex, we have to release the search
	system latch first to obey the latching order. */

	innobase_release_stat_resources(trx);

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	/* If the MySQL lock count drops to zero we know that the current SQL
	statement has ended */

	if (trx->n_mysql_tables_in_use == 0) {

8993
		trx->mysql_n_tables_locked = 0;
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8994
		prebuilt->used_in_HANDLER = FALSE;
8995

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		if (!thd_test_options(
				thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {

			if (trx_is_started(trx)) {
9000
				innobase_commit(ht, thd, TRUE);
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			}

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		} else if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
			   && trx->global_read_view) {
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			/* At low transaction isolation levels we let
			each consistent read set its own snapshot */

			read_view_close_for_mysql(trx);
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		}
	}

	DBUG_RETURN(0);
}

9016
/******************************************************************//**
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9017
With this function MySQL request a transactional lock to a table when
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user issued query LOCK TABLES..WHERE ENGINE = InnoDB.
@return	error code */
9020
UNIV_INTERN
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int
ha_innobase::transactional_table_lock(
/*==================================*/
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	THD*	thd,		/*!< in: handle to the user thread */
	int	lock_type)	/*!< in: lock type */
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{
	trx_t*		trx;

9029
	DBUG_ENTER("ha_innobase::transactional_table_lock");
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	DBUG_PRINT("enter",("lock_type: %d", lock_type));

	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

	update_thd(thd);

9038
	if (prebuilt->table->ibd_file_missing && !thd_tablespace_op(thd)) {
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		ut_print_timestamp(stderr);
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		fprintf(stderr,
			"  InnoDB: MySQL is trying to use a table handle"
			" but the .ibd file for\n"
			"InnoDB: table %s does not exist.\n"
			"InnoDB: Have you deleted the .ibd file"
			" from the database directory under\n"
			"InnoDB: the MySQL datadir?"
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			"InnoDB: See " REFMAN
			"innodb-troubleshooting.html\n"
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			"InnoDB: how you can resolve the problem.\n",
			prebuilt->table->name);
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		DBUG_RETURN(HA_ERR_CRASHED);
	}

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

9059
	reset_template(prebuilt);
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	if (lock_type == F_WRLCK) {
		prebuilt->select_lock_type = LOCK_X;
		prebuilt->stored_select_lock_type = LOCK_X;
	} else if (lock_type == F_RDLCK) {
		prebuilt->select_lock_type = LOCK_S;
		prebuilt->stored_select_lock_type = LOCK_S;
	} else {
9068 9069
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB error:\n"
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"MySQL is trying to set transactional table lock with corrupted lock type\n"
"to table %s, lock type %d does not exist.\n",
				prebuilt->table->name, lock_type);
		DBUG_RETURN(HA_ERR_CRASHED);
	}

	/* MySQL is setting a new transactional table lock */

9078
	innobase_register_trx(ht, thd, trx);
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9079

9080
	if (THDVAR(thd, table_locks) && thd_in_lock_tables(thd)) {
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		ulint	error = DB_SUCCESS;

		error = row_lock_table_for_mysql(prebuilt, NULL, 0);

		if (error != DB_SUCCESS) {
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			error = convert_error_code_to_mysql(
				(int) error, prebuilt->table->flags, thd);
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			DBUG_RETURN((int) error);
		}

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		if (thd_test_options(
			thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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9093

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			/* Store the current undo_no of the transaction
			so that we know where to roll back if we have
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			to roll back the next SQL statement */

			trx_mark_sql_stat_end(trx);
		}
	}

	DBUG_RETURN(0);
}

9105
/************************************************************************//**
9106
Here we export InnoDB status variables to MySQL. */
9107
static
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void
innodb_export_status(void)
/*======================*/
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9111
{
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	if (innodb_inited) {
		srv_export_innodb_status();
	}
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}

9117
/************************************************************************//**
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9118 9119
Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
Monitor to the client. */
9120
static
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bool
innodb_show_status(
/*===============*/
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	handlerton*	hton,	/*!< in: the innodb handlerton */
	THD*	thd,	/*!< in: the MySQL query thread of the caller */
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9126
	stat_print_fn *stat_print)
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{
	trx_t*			trx;
	static const char	truncated_msg[] = "... truncated...\n";
9130
	const long		MAX_STATUS_SIZE = 1048576;
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	ulint			trx_list_start = ULINT_UNDEFINED;
	ulint			trx_list_end = ULINT_UNDEFINED;

9134
	DBUG_ENTER("innodb_show_status");
9135
	DBUG_ASSERT(hton == innodb_hton_ptr);
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9136

9137
	trx = check_trx_exists(thd);
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	innobase_release_stat_resources(trx);

	/* We let the InnoDB Monitor to output at most MAX_STATUS_SIZE
	bytes of text. */

	long	flen, usable_len;
	char*	str;

9147
	mutex_enter(&srv_monitor_file_mutex);
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	rewind(srv_monitor_file);
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	srv_printf_innodb_monitor(srv_monitor_file, FALSE,
				  &trx_list_start, &trx_list_end);
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	flen = ftell(srv_monitor_file);
	os_file_set_eof(srv_monitor_file);

	if (flen < 0) {
		flen = 0;
	}

	if (flen > MAX_STATUS_SIZE) {
		usable_len = MAX_STATUS_SIZE;
9160
		srv_truncated_status_writes++;
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	} else {
		usable_len = flen;
	}

	/* allocate buffer for the string, and
	read the contents of the temporary file */

9168
	if (!(str = (char*) my_malloc(usable_len + 1, MYF(0)))) {
9169 9170
		mutex_exit(&srv_monitor_file_mutex);
		DBUG_RETURN(TRUE);
9171
	}
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	rewind(srv_monitor_file);
	if (flen < MAX_STATUS_SIZE) {
		/* Display the entire output. */
		flen = (long) fread(str, 1, flen, srv_monitor_file);
	} else if (trx_list_end < (ulint) flen
			&& trx_list_start < trx_list_end
			&& trx_list_start + (flen - trx_list_end)
			< MAX_STATUS_SIZE - sizeof truncated_msg - 1) {
		/* Omit the beginning of the list of active transactions. */
		long len = (long) fread(str, 1, trx_list_start, srv_monitor_file);
		memcpy(str + len, truncated_msg, sizeof truncated_msg - 1);
		len += sizeof truncated_msg - 1;
		usable_len = (MAX_STATUS_SIZE - 1) - len;
		fseek(srv_monitor_file, flen - usable_len, SEEK_SET);
		len += (long) fread(str + len, 1, usable_len, srv_monitor_file);
		flen = len;
	} else {
		/* Omit the end of the output. */
		flen = (long) fread(str, 1, MAX_STATUS_SIZE - 1, srv_monitor_file);
	}

9194
	mutex_exit(&srv_monitor_file_mutex);
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9195

9196 9197
	stat_print(thd, innobase_hton_name, (uint) strlen(innobase_hton_name),
		   STRING_WITH_LEN(""), str, flen);
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9198

9199
	my_free(str);
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9200

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9201
	DBUG_RETURN(FALSE);
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}

9204
/************************************************************************//**
9205 9206
Implements the SHOW MUTEX STATUS command.
@return TRUE on failure, FALSE on success. */
9207
static
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9208 9209
bool
innodb_mutex_show_status(
9210
/*=====================*/
9211
	handlerton*	hton,		/*!< in: the innodb handlerton */
9212
	THD*		thd,		/*!< in: the MySQL query thread of the
9213
					caller */
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	stat_print_fn*	stat_print)	/*!< in: function for printing
					statistics */
9216 9217
{
	char buf1[IO_SIZE], buf2[IO_SIZE];
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	mutex_t*	mutex;
	rw_lock_t*	lock;
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	ulint		block_mutex_oswait_count = 0;
	ulint		block_lock_oswait_count = 0;
	mutex_t*	block_mutex = NULL;
	rw_lock_t*	block_lock = NULL;
9224
#ifdef UNIV_DEBUG
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	ulint	  rw_lock_count= 0;
	ulint	  rw_lock_count_spin_loop= 0;
	ulint	  rw_lock_count_spin_rounds= 0;
	ulint	  rw_lock_count_os_wait= 0;
	ulint	  rw_lock_count_os_yield= 0;
	ulonglong rw_lock_wait_time= 0;
9231
#endif /* UNIV_DEBUG */
9232
	uint	  hton_name_len= (uint) strlen(innobase_hton_name), buf1len, buf2len;
9233
	DBUG_ENTER("innodb_mutex_show_status");
9234
	DBUG_ASSERT(hton == innodb_hton_ptr);
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9235

9236
	mutex_enter(&mutex_list_mutex);
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9237

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	for (mutex = UT_LIST_GET_FIRST(mutex_list); mutex != NULL;
	     mutex = UT_LIST_GET_NEXT(list, mutex)) {
		if (mutex->count_os_wait == 0) {
			continue;
		}
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		if (buf_pool_is_block_mutex(mutex)) {
			block_mutex = mutex;
			block_mutex_oswait_count += mutex->count_os_wait;
			continue;
9248
		}
9249
#ifdef UNIV_DEBUG
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		if (mutex->mutex_type != 1) {
			if (mutex->count_using > 0) {
				buf1len= my_snprintf(buf1, sizeof(buf1),
					"%s:%s",
					mutex->cmutex_name, mutex->cfile_name);
				buf2len= my_snprintf(buf2, sizeof(buf2),
					"count=%lu, spin_waits=%lu,"
					" spin_rounds=%lu, "
					"os_waits=%lu, os_yields=%lu,"
					" os_wait_times=%lu",
					mutex->count_using,
					mutex->count_spin_loop,
					mutex->count_spin_rounds,
					mutex->count_os_wait,
					mutex->count_os_yield,
9265
					(ulong) (mutex->lspent_time/1000));
9266

9267
				if (stat_print(thd, innobase_hton_name,
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						hton_name_len, buf1, buf1len,
						buf2, buf2len)) {
9270
					mutex_exit(&mutex_list_mutex);
9271 9272 9273
					DBUG_RETURN(1);
				}
			}
9274
		} else {
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			rw_lock_count += mutex->count_using;
			rw_lock_count_spin_loop += mutex->count_spin_loop;
			rw_lock_count_spin_rounds += mutex->count_spin_rounds;
			rw_lock_count_os_wait += mutex->count_os_wait;
			rw_lock_count_os_yield += mutex->count_os_yield;
			rw_lock_wait_time += mutex->lspent_time;
		}
9282
#else /* UNIV_DEBUG */
9283
		buf1len= (uint) my_snprintf(buf1, sizeof(buf1), "%s:%lu",
9284
				     mutex->cfile_name, (ulong) mutex->cline);
9285
		buf2len= (uint) my_snprintf(buf2, sizeof(buf2), "os_waits=%lu",
9286
				     (ulong) mutex->count_os_wait);
9287 9288 9289 9290

		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
9291
			mutex_exit(&mutex_list_mutex);
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			DBUG_RETURN(1);
		}
#endif /* UNIV_DEBUG */
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	}

	if (block_mutex) {
		buf1len = (uint) my_snprintf(buf1, sizeof buf1,
					     "combined %s:%lu",
					     block_mutex->cfile_name,
					     (ulong) block_mutex->cline);
		buf2len = (uint) my_snprintf(buf2, sizeof buf2,
					     "os_waits=%lu",
					     (ulong) block_mutex_oswait_count);
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9305

9306 9307 9308 9309 9310 9311
		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
			mutex_exit(&mutex_list_mutex);
			DBUG_RETURN(1);
		}
9312 9313
	}

9314
	mutex_exit(&mutex_list_mutex);
9315

9316 9317
	mutex_enter(&rw_lock_list_mutex);

9318 9319
	for (lock = UT_LIST_GET_FIRST(rw_lock_list); lock != NULL;
	     lock = UT_LIST_GET_NEXT(list, lock)) {
9320
		if (lock->count_os_wait == 0) {
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			continue;
		}

		if (buf_pool_is_block_lock(lock)) {
			block_lock = lock;
			block_lock_oswait_count += lock->count_os_wait;
			continue;
		}

		buf1len = my_snprintf(buf1, sizeof buf1, "%s:%lu",
				     lock->cfile_name, (ulong) lock->cline);
		buf2len = my_snprintf(buf2, sizeof buf2, "os_waits=%lu",
				      (ulong) lock->count_os_wait);

		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
			mutex_exit(&rw_lock_list_mutex);
			DBUG_RETURN(1);
		}
	}

	if (block_lock) {
		buf1len = (uint) my_snprintf(buf1, sizeof buf1,
					     "combined %s:%lu",
					     block_lock->cfile_name,
					     (ulong) block_lock->cline);
		buf2len = (uint) my_snprintf(buf2, sizeof buf2,
					     "os_waits=%lu",
					     (ulong) block_lock_oswait_count);

		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
			mutex_exit(&rw_lock_list_mutex);
			DBUG_RETURN(1);
9357 9358 9359 9360 9361
		}
	}

	mutex_exit(&rw_lock_list_mutex);

9362
#ifdef UNIV_DEBUG
9363 9364 9365 9366 9367 9368 9369 9370 9371
	buf2len = my_snprintf(buf2, sizeof buf2,
			     "count=%lu, spin_waits=%lu, spin_rounds=%lu, "
			     "os_waits=%lu, os_yields=%lu, os_wait_times=%lu",
			      (ulong) rw_lock_count,
			      (ulong) rw_lock_count_spin_loop,
			      (ulong) rw_lock_count_spin_rounds,
			      (ulong) rw_lock_count_os_wait,
			      (ulong) rw_lock_count_os_yield,
			      (ulong) (rw_lock_wait_time / 1000));
9372

9373
	if (stat_print(thd, innobase_hton_name, hton_name_len,
9374 9375 9376
			STRING_WITH_LEN("rw_lock_mutexes"), buf2, buf2len)) {
		DBUG_RETURN(1);
	}
9377
#endif /* UNIV_DEBUG */
9378 9379

	DBUG_RETURN(FALSE);
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9380 9381
}

9382
static
9383 9384 9385
bool innobase_show_status(handlerton *hton, THD* thd, 
                          stat_print_fn* stat_print,
                          enum ha_stat_type stat_type)
9386
{
9387 9388
	DBUG_ASSERT(hton == innodb_hton_ptr);

9389 9390
	switch (stat_type) {
	case HA_ENGINE_STATUS:
9391
		return innodb_show_status(hton, thd, stat_print);
9392
	case HA_ENGINE_MUTEX:
9393
		return innodb_mutex_show_status(hton, thd, stat_print);
9394
	default:
9395
		return(FALSE);
9396
	}
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}

9399
/************************************************************************//**
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9400 9401 9402 9403
 Handling the shared INNOBASE_SHARE structure that is needed to provide table
 locking.
****************************************************************************/

9404
static INNOBASE_SHARE* get_share(const char* table_name)
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9405
{
9406
	INNOBASE_SHARE *share;
9407
	mysql_mutex_lock(&innobase_share_mutex);
9408

9409
	ulint	fold = ut_fold_string(table_name);
9410 9411 9412

	HASH_SEARCH(table_name_hash, innobase_open_tables, fold,
		    INNOBASE_SHARE*, share,
9413
		    ut_ad(share->use_count > 0),
9414
		    !strcmp(share->table_name, table_name));
9415 9416 9417

	if (!share) {

9418 9419
		uint length = (uint) strlen(table_name);

9420 9421
		/* TODO: invoke HASH_MIGRATE if innobase_open_tables
		grows too big */
9422 9423 9424 9425

		share = (INNOBASE_SHARE *) my_malloc(sizeof(*share)+length+1,
			MYF(MY_FAE | MY_ZEROFILL));

9426 9427
		share->table_name = (char*) memcpy(share + 1,
						   table_name, length + 1);
9428

9429 9430
		HASH_INSERT(INNOBASE_SHARE, table_name_hash,
			    innobase_open_tables, fold, share);
9431 9432

		thr_lock_init(&share->lock);
9433 9434 9435 9436 9437

		/* Index translation table initialization */
		share->idx_trans_tbl.index_mapping = NULL;
		share->idx_trans_tbl.index_count = 0;
		share->idx_trans_tbl.array_size = 0;
9438 9439 9440
	}

	share->use_count++;
9441
	mysql_mutex_unlock(&innobase_share_mutex);
9442

9443
	return(share);
9444 9445 9446 9447
}

static void free_share(INNOBASE_SHARE* share)
{
9448
	mysql_mutex_lock(&innobase_share_mutex);
9449

9450 9451
#ifdef UNIV_DEBUG
	INNOBASE_SHARE* share2;
9452
	ulint	fold = ut_fold_string(share->table_name);
9453 9454 9455

	HASH_SEARCH(table_name_hash, innobase_open_tables, fold,
		    INNOBASE_SHARE*, share2,
9456
		    ut_ad(share->use_count > 0),
9457
		    !strcmp(share->table_name, share2->table_name));
9458 9459 9460 9461

	ut_a(share2 == share);
#endif /* UNIV_DEBUG */

9462
	if (!--share->use_count) {
9463
		ulint	fold = ut_fold_string(share->table_name);
9464 9465 9466

		HASH_DELETE(INNOBASE_SHARE, table_name_hash,
			    innobase_open_tables, fold, share);
9467
		thr_lock_delete(&share->lock);
9468 9469

		/* Free any memory from index translation table */
9470
		my_free(share->idx_trans_tbl.index_mapping);
9471

9472
		my_free(share);
9473 9474 9475

		/* TODO: invoke HASH_MIGRATE if innobase_open_tables
		shrinks too much */
9476 9477
	}

9478
	mysql_mutex_unlock(&innobase_share_mutex);
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9479 9480
}

9481
/*****************************************************************//**
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9482 9483 9484 9485 9486 9487
Converts a MySQL table lock stored in the 'lock' field of the handle to
a proper type before storing pointer to the lock into an array of pointers.
MySQL also calls this if it wants to reset some table locks to a not-locked
state during the processing of an SQL query. An example is that during a
SELECT the read lock is released early on the 'const' tables where we only
fetch one row. MySQL does not call this when it releases all locks at the
9488 9489
end of an SQL statement.
@return	pointer to the next element in the 'to' array */
9490
UNIV_INTERN
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9491 9492 9493
THR_LOCK_DATA**
ha_innobase::store_lock(
/*====================*/
9494 9495
	THD*			thd,		/*!< in: user thread handle */
	THR_LOCK_DATA**		to,		/*!< in: pointer to an array
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9496 9497 9498 9499
						of pointers to lock structs;
						pointer to the 'lock' field
						of current handle is stored
						next to this array */
9500
	enum thr_lock_type	lock_type)	/*!< in: lock type to store in
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9501 9502 9503
						'lock'; this may also be
						TL_IGNORE */
{
9504 9505
	trx_t*		trx;

9506 9507 9508
	/* Note that trx in this function is NOT necessarily prebuilt->trx
	because we call update_thd() later, in ::external_lock()! Failure to
	understand this caused a serious memory corruption bug in 5.1.11. */
9509

9510
	trx = check_trx_exists(thd);
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9511

9512
	/* NOTE: MySQL can call this function with lock 'type' TL_IGNORE!
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9513 9514 9515
	Be careful to ignore TL_IGNORE if we are going to do something with
	only 'real' locks! */

9516
	/* If no MySQL table is in use, we need to set the isolation level
9517 9518 9519
	of the transaction. */

	if (lock_type != TL_IGNORE
9520
	    && trx->n_mysql_tables_in_use == 0) {
9521
		trx->isolation_level = innobase_map_isolation_level(
9522
			(enum_tx_isolation) thd_tx_isolation(thd));
9523 9524 9525 9526 9527 9528 9529 9530 9531

		if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
		    && trx->global_read_view) {

			/* At low transaction isolation levels we let
			each consistent read set its own snapshot */

			read_view_close_for_mysql(trx);
		}
9532 9533
	}

9534
	DBUG_ASSERT(EQ_CURRENT_THD(thd));
9535
	const bool in_lock_tables = thd_in_lock_tables(thd);
9536
	const uint sql_command = thd_sql_command(thd);
9537

9538
	if (sql_command == SQLCOM_DROP_TABLE) {
9539 9540 9541 9542 9543

		/* MySQL calls this function in DROP TABLE though this table
		handle may belong to another thd that is running a query. Let
		us in that case skip any changes to the prebuilt struct. */ 

9544 9545 9546 9547 9548 9549
	} else if ((lock_type == TL_READ && in_lock_tables)
		   || (lock_type == TL_READ_HIGH_PRIORITY && in_lock_tables)
		   || lock_type == TL_READ_WITH_SHARED_LOCKS
		   || lock_type == TL_READ_NO_INSERT
		   || (lock_type != TL_IGNORE
		       && sql_command != SQLCOM_SELECT)) {
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9550 9551

		/* The OR cases above are in this order:
9552 9553
		1) MySQL is doing LOCK TABLES ... READ LOCAL, or we
		are processing a stored procedure or function, or
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		2) (we do not know when TL_READ_HIGH_PRIORITY is used), or
		3) this is a SELECT ... IN SHARE MODE, or
		4) we are doing a complex SQL statement like
		INSERT INTO ... SELECT ... and the logical logging (MySQL
		binlog) requires the use of a locking read, or
		MySQL is doing LOCK TABLES ... READ.
		5) we let InnoDB do locking reads for all SQL statements that
		are not simple SELECTs; note that select_lock_type in this
		case may get strengthened in ::external_lock() to LOCK_X.
		Note that we MUST use a locking read in all data modifying
		SQL statements, because otherwise the execution would not be
		serializable, and also the results from the update could be
		unexpected if an obsolete consistent read view would be
		used. */

9569
		ulint	isolation_level;
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9570

9571 9572 9573
		isolation_level = trx->isolation_level;

		if ((srv_locks_unsafe_for_binlog
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9574
		     || isolation_level <= TRX_ISO_READ_COMMITTED)
9575 9576 9577
		    && isolation_level != TRX_ISO_SERIALIZABLE
		    && (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT)
		    && (sql_command == SQLCOM_INSERT_SELECT
9578
			|| sql_command == SQLCOM_REPLACE_SELECT
9579 9580
			|| sql_command == SQLCOM_UPDATE
			|| sql_command == SQLCOM_CREATE_TABLE)) {
9581 9582 9583 9584

			/* If we either have innobase_locks_unsafe_for_binlog
			option set or this session is using READ COMMITTED
			isolation level and isolation level of the transaction
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9585
			is not set to serializable and MySQL is doing
9586 9587 9588 9589 9590
			INSERT INTO...SELECT or REPLACE INTO...SELECT
			or UPDATE ... = (SELECT ...) or CREATE  ...
			SELECT... without FOR UPDATE or IN SHARE
			MODE in select, then we use consistent read
			for select. */
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9591 9592 9593

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
9594
		} else if (sql_command == SQLCOM_CHECKSUM) {
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			/* Use consistent read for checksum table */

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
		} else {
			prebuilt->select_lock_type = LOCK_S;
			prebuilt->stored_select_lock_type = LOCK_S;
		}

	} else if (lock_type != TL_IGNORE) {

9606
		/* We set possible LOCK_X value in external_lock, not yet
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9607 9608 9609 9610 9611 9612 9613 9614
		here even if this would be SELECT ... FOR UPDATE */

		prebuilt->select_lock_type = LOCK_NONE;
		prebuilt->stored_select_lock_type = LOCK_NONE;
	}

	if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK) {

9615
		/* Starting from 5.0.7, we weaken also the table locks
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9616 9617
		set at the start of a MySQL stored procedure call, just like
		we weaken the locks set at the start of an SQL statement.
9618
		MySQL does set in_lock_tables TRUE there, but in reality
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		we do not need table locks to make the execution of a
		single transaction stored procedure call deterministic
		(if it does not use a consistent read). */

9623
		if (lock_type == TL_READ
9624
		    && sql_command == SQLCOM_LOCK_TABLES) {
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			/* We come here if MySQL is processing LOCK TABLES
			... READ LOCAL. MyISAM under that table lock type
			reads the table as it was at the time the lock was
			granted (new inserts are allowed, but not seen by the
			reader). To get a similar effect on an InnoDB table,
			we must use LOCK TABLES ... READ. We convert the lock
			type here, so that for InnoDB, READ LOCAL is
			equivalent to READ. This will change the InnoDB
			behavior in mysqldump, so that dumps of InnoDB tables
			are consistent with dumps of MyISAM tables. */

			lock_type = TL_READ_NO_INSERT;
		}

9639
		/* If we are not doing a LOCK TABLE, DISCARD/IMPORT
9640
		TABLESPACE or TRUNCATE TABLE then allow multiple
9641 9642
		writers. Note that ALTER TABLE uses a TL_WRITE_ALLOW_READ
		< TL_WRITE_CONCURRENT_INSERT.
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9643

9644
		We especially allow multiple writers if MySQL is at the
9645
		start of a stored procedure call (SQLCOM_CALL) or a
9646
		stored function call (MySQL does have in_lock_tables
9647
		TRUE there). */
9648

9649
		if ((lock_type >= TL_WRITE_CONCURRENT_INSERT
9650 9651 9652 9653 9654 9655 9656
		     && lock_type <= TL_WRITE)
		    && !(in_lock_tables
			 && sql_command == SQLCOM_LOCK_TABLES)
		    && !thd_tablespace_op(thd)
		    && sql_command != SQLCOM_TRUNCATE
		    && sql_command != SQLCOM_OPTIMIZE
		    && sql_command != SQLCOM_CREATE_TABLE) {
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9657

9658
			lock_type = TL_WRITE_ALLOW_WRITE;
9659
		}
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		/* In queries of type INSERT INTO t1 SELECT ... FROM t2 ...
		MySQL would use the lock TL_READ_NO_INSERT on t2, and that
		would conflict with TL_WRITE_ALLOW_WRITE, blocking all inserts
		to t2. Convert the lock to a normal read lock to allow
9665
		concurrent inserts to t2.
9666

9667 9668
		We especially allow concurrent inserts if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL)
9669
		(MySQL does have thd_in_lock_tables() TRUE there). */
9670

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9671
		if (lock_type == TL_READ_NO_INSERT
9672
		    && sql_command != SQLCOM_LOCK_TABLES) {
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			lock_type = TL_READ;
		}
9676

9677 9678
		lock.type = lock_type;
	}
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9679

9680
	*to++= &lock;
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9681 9682 9683 9684

	return(to);
}

9685
/*********************************************************************//**
9686 9687
Read the next autoinc value. Acquire the relevant locks before reading
the AUTOINC value. If SUCCESS then the table AUTOINC mutex will be locked
9688 9689
on return and all relevant locks acquired.
@return	DB_SUCCESS or error code */
9690
UNIV_INTERN
9691 9692 9693
ulint
ha_innobase::innobase_get_autoinc(
/*==============================*/
9694
	ulonglong*	value)		/*!< out: autoinc value */
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9695
{
9696 9697
 	*value = 0;
 
9698
	prebuilt->autoinc_error = innobase_lock_autoinc();
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9699

9700
	if (prebuilt->autoinc_error == DB_SUCCESS) {
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9701

9702 9703 9704 9705
		/* Determine the first value of the interval */
		*value = dict_table_autoinc_read(prebuilt->table);

		/* It should have been initialized during open. */
9706 9707 9708 9709
		if (*value == 0) {
			prebuilt->autoinc_error = DB_UNSUPPORTED;
			dict_table_autoinc_unlock(prebuilt->table);
		}
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9710
	}
9711 9712

	return(prebuilt->autoinc_error);
9713
}
9714

9715
/*******************************************************************//**
9716
This function reads the global auto-inc counter. It doesn't use the
9717 9718
AUTOINC lock even if the lock mode is set to TRADITIONAL.
@return	the autoinc value */
9719
UNIV_INTERN
9720 9721 9722
ulonglong
ha_innobase::innobase_peek_autoinc(void)
/*====================================*/
9723
{
9724 9725
	ulonglong	auto_inc;
	dict_table_t*	innodb_table;
9726

9727 9728
	ut_a(prebuilt != NULL);
	ut_a(prebuilt->table != NULL);
9729

9730
	innodb_table = prebuilt->table;
9731

9732
	dict_table_autoinc_lock(innodb_table);
9733

9734
	auto_inc = dict_table_autoinc_read(innodb_table);
9735

9736 9737 9738 9739 9740
	if (auto_inc == 0) {
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB: AUTOINC next value generation "
			"is disabled for '%s'\n", innodb_table->name);
	}
9741

9742
	dict_table_autoinc_unlock(innodb_table);
9743

9744
	return(auto_inc);
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9745
}
9746 9747

/*********************************************************************//**
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This function initializes the auto-inc counter if it has not been
initialized yet. This function does not change the value of the auto-inc
counter if it already has been initialized. Returns the value of the
9751 9752
auto-inc counter in *first_value, and ULONGLONG_MAX in *nb_reserved_values (as
we have a table-level lock). offset, increment, nb_desired_values are ignored.
9753 9754
*first_value is set to -1 if error (deadlock or lock wait timeout) */
UNIV_INTERN
9755 9756
void
ha_innobase::get_auto_increment(
9757
/*============================*/
9758
        ulonglong	offset,              /*!< in: table autoinc offset */
9759 9760 9761 9762
        ulonglong	increment,           /*!< in: table autoinc increment */
        ulonglong	nb_desired_values,   /*!< in: number of values reqd */
        ulonglong	*first_value,        /*!< out: the autoinc value */
        ulonglong	*nb_reserved_values) /*!< out: count of reserved values */
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9763
{
9764
	trx_t*		trx;
9765 9766
	ulint		error;
	ulonglong	autoinc = 0;
9767

9768
	/* Prepare prebuilt->trx in the table handle */
9769
	update_thd(ha_thd());
9770

9771
	error = innobase_get_autoinc(&autoinc);
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9772

9773 9774
	if (error != DB_SUCCESS) {
		*first_value = (~(ulonglong) 0);
9775
		return;
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	}

9778 9779 9780 9781 9782 9783
	/* This is a hack, since nb_desired_values seems to be accurate only
	for the first call to get_auto_increment() for multi-row INSERT and
	meaningless for other statements e.g, LOAD etc. Subsequent calls to
	this method for the same statement results in different values which
	don't make sense. Therefore we store the value the first time we are
	called and count down from that as rows are written (see write_row()).
9784
	*/
9785

9786
	trx = prebuilt->trx;
9787

9788 9789 9790 9791
	/* Note: We can't rely on *first_value since some MySQL engines,
	in particular the partition engine, don't initialize it to 0 when
	invoking this method. So we are not sure if it's guaranteed to
	be 0 or not. */
9792

9793 9794 9795 9796 9797
	/* We need the upper limit of the col type to check for
	whether we update the table autoinc counter or not. */
	ulonglong	col_max_value = innobase_get_int_col_max_value(
		table->next_number_field);

9798 9799
	/* Called for the first time ? */
	if (trx->n_autoinc_rows == 0) {
9800

9801
		trx->n_autoinc_rows = (ulint) nb_desired_values;
9802

9803 9804 9805 9806 9807
		/* It's possible for nb_desired_values to be 0:
		e.g., INSERT INTO T1(C) SELECT C FROM T2; */
		if (nb_desired_values == 0) {

			trx->n_autoinc_rows = 1;
9808 9809
		}

9810
		set_if_bigger(*first_value, autoinc);
9811
	/* Not in the middle of a mult-row INSERT. */
9812
	} else if (prebuilt->autoinc_last_value == 0) {
9813
		set_if_bigger(*first_value, autoinc);
9814 9815 9816 9817 9818
	/* Check for -ve values. */
	} else if (*first_value > col_max_value && trx->n_autoinc_rows > 0) {
		/* Set to next logical value. */
		ut_a(autoinc > trx->n_autoinc_rows);
		*first_value = (autoinc - trx->n_autoinc_rows) - 1;
9819 9820
	}

9821
	*nb_reserved_values = trx->n_autoinc_rows;
9822

9823 9824 9825
	/* With old style AUTOINC locking we only update the table's
	AUTOINC counter after attempting to insert the row. */
	if (innobase_autoinc_lock_mode != AUTOINC_OLD_STYLE_LOCKING) {
9826
		ulonglong	need;
9827
		ulonglong	current;
9828
		ulonglong	next_value;
9829

9830
		current = *first_value > col_max_value ? autoinc : *first_value;
9831
		need = *nb_reserved_values * increment;
9832

9833
		/* Compute the last value in the interval */
9834
		next_value = innobase_next_autoinc(
9835
			current, need, offset, col_max_value);
9836

9837 9838
		prebuilt->autoinc_last_value = next_value;

9839 9840 9841 9842 9843 9844 9845
		if (prebuilt->autoinc_last_value < *first_value) {
			*first_value = (~(ulonglong) 0);
		} else {
			/* Update the table autoinc variable */
			dict_table_autoinc_update_if_greater(
				prebuilt->table, prebuilt->autoinc_last_value);
		}
9846 9847 9848
	} else {
		/* This will force write_row() into attempting an update
		of the table's AUTOINC counter. */
9849
		prebuilt->autoinc_last_value = 0;
9850
	}
9851 9852 9853

	/* The increment to be used to increase the AUTOINC value, we use
	this in write_row() and update_row() to increase the autoinc counter
9854 9855 9856 9857
	for columns that are filled by the user. We need the offset and
	the increment. */
	prebuilt->autoinc_offset = offset;
	prebuilt->autoinc_increment = increment;
9858 9859

	dict_table_autoinc_unlock(prebuilt->table);
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9860 9861
}

9862
/*******************************************************************//**
9863 9864 9865
Reset the auto-increment counter to the given value, i.e. the next row
inserted will get the given value. This is called e.g. after TRUNCATE
is emulated by doing a 'DELETE FROM t'. HA_ERR_WRONG_COMMAND is
9866 9867
returned by storage engines that don't support this operation.
@return	0 or error code */
9868
UNIV_INTERN
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9869
int
9870 9871
ha_innobase::reset_auto_increment(
/*==============================*/
9872
	ulonglong	value)		/*!< in: new value for table autoinc */
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9873 9874 9875
{
	DBUG_ENTER("ha_innobase::reset_auto_increment");

9876
	int	error;
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9877

9878
	update_thd(ha_thd());
9879

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9880 9881 9882
	error = row_lock_table_autoinc_for_mysql(prebuilt);

	if (error != DB_SUCCESS) {
9883 9884 9885
		error = convert_error_code_to_mysql(error,
						    prebuilt->table->flags,
						    user_thd);
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9886 9887

		DBUG_RETURN(error);
9888
	}
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9889

9890 9891 9892 9893 9894
	/* The next value can never be 0. */
	if (value == 0) {
		value = 1;
	}

9895
	innobase_reset_autoinc(value);
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	DBUG_RETURN(0);
}

/* See comment in handler.cc */
9901
UNIV_INTERN
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bool
ha_innobase::get_error_message(int error, String *buf)
{
9905
	trx_t*	trx = check_trx_exists(ha_thd());
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	buf->copy(trx->detailed_error, (uint) strlen(trx->detailed_error),
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		system_charset_info);

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	return(FALSE);
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}

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/*******************************************************************//**
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Compares two 'refs'. A 'ref' is the (internal) primary key value of the row.
If there is no explicitly declared non-null unique key or a primary key, then
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InnoDB internally uses the row id as the primary key.
@return	< 0 if ref1 < ref2, 0 if equal, else > 0 */
9918
UNIV_INTERN
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int
ha_innobase::cmp_ref(
/*=================*/
9922
	const uchar*	ref1,	/*!< in: an (internal) primary key value in the
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				MySQL key value format */
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	const uchar*	ref2)	/*!< in: an (internal) primary key value in the
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				MySQL key value format */
{
	enum_field_types mysql_type;
	Field*		field;
	KEY_PART_INFO*	key_part;
	KEY_PART_INFO*	key_part_end;
	uint		len1;
	uint		len2;
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	int		result;
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	if (prebuilt->clust_index_was_generated) {
		/* The 'ref' is an InnoDB row id */

		return(memcmp(ref1, ref2, DATA_ROW_ID_LEN));
	}

	/* Do a type-aware comparison of primary key fields. PK fields
	are always NOT NULL, so no checks for NULL are performed. */

	key_part = table->key_info[table->s->primary_key].key_part;

	key_part_end = key_part
			+ table->key_info[table->s->primary_key].key_parts;

	for (; key_part != key_part_end; ++key_part) {
		field = key_part->field;
		mysql_type = field->type();

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		if (mysql_type == MYSQL_TYPE_TINY_BLOB
			|| mysql_type == MYSQL_TYPE_MEDIUM_BLOB
			|| mysql_type == MYSQL_TYPE_BLOB
			|| mysql_type == MYSQL_TYPE_LONG_BLOB) {
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			/* In the MySQL key value format, a column prefix of
			a BLOB is preceded by a 2-byte length field */

			len1 = innobase_read_from_2_little_endian(ref1);
			len2 = innobase_read_from_2_little_endian(ref2);

			ref1 += 2;
			ref2 += 2;
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			result = ((Field_blob*)field)->cmp( ref1, len1,
                                                            ref2, len2);
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		} else {
			result = field->key_cmp(ref1, ref2);
		}

		if (result) {

			return(result);
		}

		ref1 += key_part->store_length;
		ref2 += key_part->store_length;
	}

	return(0);
}

9984
/*******************************************************************//**
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Ask InnoDB if a query to a table can be cached.
@return	TRUE if query caching of the table is permitted */
9987
UNIV_INTERN
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my_bool
ha_innobase::register_query_cache_table(
/*====================================*/
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	THD*		thd,		/*!< in: user thread handle */
	char*		table_key,	/*!< in: concatenation of database name,
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					the null character NUL,
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					and the table name */
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	uint		key_length,	/*!< in: length of the full name, i.e.
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					len(dbname) + len(tablename) + 1 */
	qc_engine_callback*
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			call_back,	/*!< out: pointer to function for
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					checking if query caching
					is permitted */
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	ulonglong	*engine_data)	/*!< in/out: data to call_back */
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{
	*call_back = innobase_query_caching_of_table_permitted;
	*engine_data = 0;
	return(innobase_query_caching_of_table_permitted(thd, table_key,
							 key_length,
							 engine_data));
}

10010
UNIV_INTERN
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char*
ha_innobase::get_mysql_bin_log_name()
{
	return(trx_sys_mysql_bin_log_name);
}

10017
UNIV_INTERN
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ulonglong
ha_innobase::get_mysql_bin_log_pos()
{
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	/* trx... is ib_int64_t, which is a typedef for a 64-bit integer
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	(__int64 or longlong) so it's ok to cast it to ulonglong. */

10024
	return(trx_sys_mysql_bin_log_pos);
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}

10027
/******************************************************************//**
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This function is used to find the storage length in bytes of the first n
characters for prefix indexes using a multibyte character set. The function
finds charset information and returns length of prefix_len characters in the
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index field in bytes.
@return	number of bytes occupied by the first n characters */
10033
extern "C" UNIV_INTERN
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ulint
innobase_get_at_most_n_mbchars(
/*===========================*/
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	ulint charset_id,	/*!< in: character set id */
	ulint prefix_len,	/*!< in: prefix length in bytes of the index
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				(this has to be divided by mbmaxlen to get the
				number of CHARACTERS n in the prefix) */
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	ulint data_len,		/*!< in: length of the string in bytes */
	const char* str)	/*!< in: character string */
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{
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	ulint char_length;	/*!< character length in bytes */
	ulint n_chars;		/*!< number of characters in prefix */
	CHARSET_INFO* charset;	/*!< charset used in the field */
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	charset = get_charset((uint) charset_id, MYF(MY_WME));

	ut_ad(charset);
	ut_ad(charset->mbmaxlen);

	/* Calculate how many characters at most the prefix index contains */

	n_chars = prefix_len / charset->mbmaxlen;

	/* If the charset is multi-byte, then we must find the length of the
	first at most n chars in the string. If the string contains less
	characters than n, then we return the length to the end of the last
	character. */

	if (charset->mbmaxlen > 1) {
		/* my_charpos() returns the byte length of the first n_chars
		characters, or a value bigger than the length of str, if
		there were not enough full characters in str.

		Why does the code below work:
		Suppose that we are looking for n UTF-8 characters.

		1) If the string is long enough, then the prefix contains at
		least n complete UTF-8 characters + maybe some extra
		characters + an incomplete UTF-8 character. No problem in
		this case. The function returns the pointer to the
		end of the nth character.

		2) If the string is not long enough, then the string contains
		the complete value of a column, that is, only complete UTF-8
		characters, and we can store in the column prefix index the
		whole string. */

		char_length = my_charpos(charset, str,
						str + data_len, (int) n_chars);
		if (char_length > data_len) {
			char_length = data_len;
10085
		}
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	} else {
		if (data_len < prefix_len) {
			char_length = data_len;
		} else {
			char_length = prefix_len;
		}
	}

	return(char_length);
}

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/*******************************************************************//**
This function is used to prepare an X/Open XA distributed transaction.
10099
@return	0 or error number */
10100
static
10101
int
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innobase_xa_prepare(
/*================*/
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        handlerton*	hton,	/*!< in: InnoDB handlerton */
	THD*		thd,	/*!< in: handle to the MySQL thread of
				the user whose XA transaction should
				be prepared */
	bool		all)	/*!< in: TRUE - commit transaction
				FALSE - the current SQL statement
				ended */
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{
	int error = 0;
10113
	trx_t* trx = check_trx_exists(thd);
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	DBUG_ASSERT(hton == innodb_hton_ptr);

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	/* we use support_xa value as it was seen at transaction start
	time, not the current session variable value. Any possible changes
	to the session variable take effect only in the next transaction */
	if (!trx->support_xa) {
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		return(0);
	}

10125
	thd_get_xid(thd, (MYSQL_XID*) &trx->xid);
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	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

10133
	if (!trx_is_registered_for_2pc(trx) && trx_is_started(trx)) {
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10135 10136
		sql_print_error("Transaction not registered for MySQL 2PC, "
				"but transaction is active");
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	}

	if (all
10140
	    || (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
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		/* We were instructed to prepare the whole transaction, or
		this is an SQL statement end and autocommit is on */
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10145
		ut_ad(trx_is_registered_for_2pc(trx));
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		error = (int) trx_prepare_for_mysql(trx);
	} else {
10149
		/* We just mark the SQL statement ended and do not do a
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		transaction prepare */

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		/* If we had reserved the auto-inc lock for some
		table in this SQL statement we release it now */
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10155
		row_unlock_table_autoinc_for_mysql(trx);
10156

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		/* Store the current undo_no of the transaction so that we
		know where to roll back if we have to roll back the next
		SQL statement */

		trx_mark_sql_stat_end(trx);
	}

	/* Tell the InnoDB server that there might be work for utility
	threads: */

	srv_active_wake_master_thread();

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	if (thd_sql_command(thd) != SQLCOM_XA_PREPARE
	    && (all
		|| !thd_test_options(
			thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
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		/* For ibbackup to work the order of transactions in binlog
		and InnoDB must be the same. Consider the situation

		  thread1> prepare; write to binlog; ...
			  <context switch>
		  thread2> prepare; write to binlog; commit
		  thread1>			     ... commit

		To ensure this will not happen we're taking the mutex on
		prepare, and releasing it on commit.

		Note: only do it for normal commits, done via ha_commit_trans.
		If 2pc protocol is executed by external transaction
		coordinator, it will be just a regular MySQL client
		executing XA PREPARE and XA COMMIT commands.
		In this case we cannot know how many minutes or hours
		will be between XA PREPARE and XA COMMIT, and we don't want
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		to block for undefined period of time. */
10192
		mysql_mutex_lock(&prepare_commit_mutex);
10193
		trx_owns_prepare_commit_mutex_set(trx);
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	}

10196
	return(error);
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}

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/*******************************************************************//**
This function is used to recover X/Open XA distributed transactions.
10201
@return	number of prepared transactions stored in xid_list */
10202
static
10203
int
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innobase_xa_recover(
/*================*/
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	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid_list,/*!< in/out: prepared transactions */
	uint		len)	/*!< in: number of slots in xid_list */
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{
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	DBUG_ASSERT(hton == innodb_hton_ptr);

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	if (len == 0 || xid_list == NULL) {

		return(0);
	}

	return(trx_recover_for_mysql(xid_list, len));
}

10220
/*******************************************************************//**
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This function is used to commit one X/Open XA distributed transaction
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which is in the prepared state
@return	0 or error number */
10224
static
10225
int
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innobase_commit_by_xid(
/*===================*/
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	handlerton*	hton,
	XID*		xid)	/*!< in: X/Open XA transaction identification */
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{
	trx_t*	trx;

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	DBUG_ASSERT(hton == innodb_hton_ptr);

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	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		innobase_commit_low(trx);
10239

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		return(XA_OK);
	} else {
		return(XAER_NOTA);
	}
}

10246
/*******************************************************************//**
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10247
This function is used to rollback one X/Open XA distributed transaction
10248 10249
which is in the prepared state
@return	0 or error number */
10250
static
10251
int
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innobase_rollback_by_xid(
/*=====================*/
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	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid)	/*!< in: X/Open XA transaction
				identification */
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{
	trx_t*	trx;

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	DBUG_ASSERT(hton == innodb_hton_ptr);

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	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		return(innobase_rollback_trx(trx));
	} else {
		return(XAER_NOTA);
	}
}

10271
/*******************************************************************//**
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Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
10274
This consistent view is then used inside of MySQL when accessing records
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using a cursor.
@return	pointer to cursor view or NULL */
10277
static
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void*
10279
innobase_create_cursor_view(
10280
/*========================*/
10281 10282
        handlerton *hton, /*!< in: innobase hton */
	THD* thd)	  /*!< in: user thread handle */
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10283
{
10284 10285
	DBUG_ASSERT(hton == innodb_hton_ptr);

10286
	return(read_cursor_view_create_for_mysql(check_trx_exists(thd)));
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}

10289
/*******************************************************************//**
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10290
Close the given consistent cursor view of a transaction and restore
10291
global read view to a transaction read view. Transaction is created if the
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10292
corresponding MySQL thread still lacks one. */
10293
static
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10294 10295
void
innobase_close_cursor_view(
10296
/*=======================*/
10297
        handlerton *hton,
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	THD*	thd,	/*!< in: user thread handle */
	void*	curview)/*!< in: Consistent read view to be closed */
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{
10301 10302
	DBUG_ASSERT(hton == innodb_hton_ptr);

10303 10304
	read_cursor_view_close_for_mysql(check_trx_exists(thd),
					 (cursor_view_t*) curview);
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}

10307
/*******************************************************************//**
10308 10309
Set the given consistent cursor view to a transaction which is created
if the corresponding MySQL thread still lacks one. If the given
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consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
10312
static
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void
innobase_set_cursor_view(
/*=====================*/
10316
        handlerton *hton,
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	THD*	thd,	/*!< in: user thread handle */
	void*	curview)/*!< in: Consistent cursor view to be set */
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{
10320 10321
	DBUG_ASSERT(hton == innodb_hton_ptr);

10322 10323
	read_cursor_set_for_mysql(check_trx_exists(thd),
				  (cursor_view_t*) curview);
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}

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/*******************************************************************//**
If col_name is not NULL, check whether the named column is being
renamed in the table. If col_name is not provided, check
whether any one of columns in the table is being renamed.
@return true if the column is being renamed */
static
bool
check_column_being_renamed(
/*=======================*/
	const TABLE*	table,		/*!< in: MySQL table */
	const char*	col_name)	/*!< in: name of the column */
{
	uint		k;
	Field*		field;

	for (k = 0; k < table->s->fields; k++) {
		field = table->field[k];
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		if (field->flags & FIELD_IS_RENAMED) {

			/* If col_name is not provided, return
			if the field is marked as being renamed. */
			if (!col_name) {
				return(true);
			}

			/* If col_name is provided, return only
			if names match */
			if (innobase_strcasecmp(field->field_name,
						col_name) == 0) {
				return(true);
			}
		}
	}

	return(false);
}

/*******************************************************************//**
Check whether any of the given columns is being renamed in the table.
@return true if any of col_names is being renamed in table */
10367 10368 10369 10370
static
bool
column_is_being_renamed(
/*====================*/
10371 10372 10373
	TABLE*		table,		/*!< in: MySQL table */
	uint		n_cols,		/*!< in: number of columns */
	const char**	col_names)	/*!< in: names of the columns */
10374 10375 10376 10377
{
	uint		j;

	for (j = 0; j < n_cols; j++) {
10378 10379
		if (check_column_being_renamed(table, col_names[j])) {
			return(true);
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		}
	}

	return(false);
}

/***********************************************************************
Check whether a column in table "table" is being renamed and if this column
is part of a foreign key, either part of another table, referencing this
table or part of this table, referencing another table. */
static
bool
foreign_key_column_is_being_renamed(
/*================================*/
					/* out: true if a column that
					participates in a foreign key definition
					is being renamed */
	row_prebuilt_t*	prebuilt,	/* in: InnoDB prebuilt struct */
	TABLE*		table)		/* in: MySQL table */
{
	dict_foreign_t*	foreign;

	/* check whether there are foreign keys at all */
	if (UT_LIST_GET_LEN(prebuilt->table->foreign_list) == 0
	    && UT_LIST_GET_LEN(prebuilt->table->referenced_list) == 0) {
		/* no foreign keys involved with prebuilt->table */

		return(false);
	}

	row_mysql_lock_data_dictionary(prebuilt->trx);

	/* Check whether any column in the foreign key constraints which refer
	to this table is being renamed. */
	for (foreign = UT_LIST_GET_FIRST(prebuilt->table->referenced_list);
	     foreign != NULL;
	     foreign = UT_LIST_GET_NEXT(referenced_list, foreign)) {

		if (column_is_being_renamed(table, foreign->n_fields,
					    foreign->referenced_col_names)) {

			row_mysql_unlock_data_dictionary(prebuilt->trx);
			return(true);
		}
	}

	/* Check whether any column in the foreign key constraints in the
	table is being renamed. */
	for (foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list);
	     foreign != NULL;
	     foreign = UT_LIST_GET_NEXT(foreign_list, foreign)) {

		if (column_is_being_renamed(table, foreign->n_fields,
					    foreign->foreign_col_names)) {

			row_mysql_unlock_data_dictionary(prebuilt->trx);
			return(true);
		}
	}

	row_mysql_unlock_data_dictionary(prebuilt->trx);

	return(false);
}

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UNIV_INTERN
bool
ha_innobase::check_if_incompatible_data(
10448 10449
	HA_CREATE_INFO*	info,
	uint		table_changes)
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{
10451
	if (table_changes != IS_EQUAL_YES) {
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10453
		return(COMPATIBLE_DATA_NO);
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	}

	/* Check that auto_increment value was not changed */
	if ((info->used_fields & HA_CREATE_USED_AUTO) &&
		info->auto_increment_value != 0) {

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		return(COMPATIBLE_DATA_NO);
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	}

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	/* For column rename operation, MySQL does not supply enough
	information (new column name etc.) for InnoDB to make appropriate
	system metadata change. To avoid system metadata inconsistency,
	currently we can just request a table rebuild/copy by returning
	COMPATIBLE_DATA_NO */
	if (check_column_being_renamed(table, NULL)) {
		return COMPATIBLE_DATA_NO;
	}

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	/* Check if a column participating in a foreign key is being renamed.
	There is no mechanism for updating InnoDB foreign key definitions. */
	if (foreign_key_column_is_being_renamed(prebuilt, table)) {

		return COMPATIBLE_DATA_NO;
	}

10479
	/* Check that row format didn't change */
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	if ((info->used_fields & HA_CREATE_USED_ROW_FORMAT)
	    && info->row_type != ROW_TYPE_DEFAULT
	    && info->row_type != get_row_type()) {
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		return(COMPATIBLE_DATA_NO);
	}
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10486

10487 10488
	/* Specifying KEY_BLOCK_SIZE requests a rebuild of the table. */
	if (info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE) {
10489
		return(COMPATIBLE_DATA_NO);
10490 10491
	}

10492
	return(COMPATIBLE_DATA_YES);
10493
}
10494

10495
/************************************************************//**
10496 10497
Validate the file format name and return its corresponding id.
@return	valid file format id */
10498 10499 10500 10501
static
uint
innobase_file_format_name_lookup(
/*=============================*/
10502
	const char*	format_name)	/*!< in: pointer to file format name */
10503 10504 10505 10506 10507 10508 10509 10510 10511 10512 10513 10514 10515 10516 10517 10518 10519 10520 10521 10522 10523 10524 10525 10526 10527 10528 10529 10530 10531 10532 10533 10534 10535 10536 10537
{
	char*	endp;
	uint	format_id;

	ut_a(format_name != NULL);

	/* The format name can contain the format id itself instead of
	the name and we check for that. */
	format_id = (uint) strtoul(format_name, &endp, 10);

	/* Check for valid parse. */
	if (*endp == '\0' && *format_name != '\0') {

		if (format_id <= DICT_TF_FORMAT_MAX) {

			return(format_id);
		}
	} else {

		for (format_id = 0; format_id <= DICT_TF_FORMAT_MAX;
		     format_id++) {
			const char*	name;

			name = trx_sys_file_format_id_to_name(format_id);

			if (!innobase_strcasecmp(format_name, name)) {

				return(format_id);
			}
		}
	}

	return(DICT_TF_FORMAT_MAX + 1);
}

10538
/************************************************************//**
10539
Validate the file format check config parameters, as a side effect it
10540
sets the srv_max_file_format_at_startup variable.
10541
@return the format_id if valid config value, otherwise, return -1 */
10542
static
10543 10544
int
innobase_file_format_validate_and_set(
10545 10546
/*==================================*/
	const char*	format_max)	/*!< in: parameter value */
10547 10548
{
	uint		format_id;
10549

10550
	format_id = innobase_file_format_name_lookup(format_max);
10551 10552

	if (format_id < DICT_TF_FORMAT_MAX + 1) {
10553
		srv_max_file_format_at_startup = format_id;
10554 10555

		return((int) format_id);
10556
	} else {
10557
		return(-1);
10558 10559 10560
	}
}

10561
/*************************************************************//**
10562
Check if it is a valid file format. This function is registered as
10563 10564
a callback with MySQL.
@return	0 for valid file format */
10565 10566 10567 10568
static
int
innodb_file_format_name_validate(
/*=============================*/
10569 10570
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
10571
						variable */
10572
	void*				save,	/*!< out: immediate result
10573
						for update function */
10574
	struct st_mysql_value*		value)	/*!< in: incoming string */
10575 10576 10577 10578 10579 10580 10581 10582 10583 10584 10585 10586 10587 10588 10589 10590 10591 10592
{
	const char*	file_format_input;
	char		buff[STRING_BUFFER_USUAL_SIZE];
	int		len = sizeof(buff);

	ut_a(save != NULL);
	ut_a(value != NULL);

	file_format_input = value->val_str(value, buff, &len);

	if (file_format_input != NULL) {
		uint	format_id;

		format_id = innobase_file_format_name_lookup(
			file_format_input);

		if (format_id <= DICT_TF_FORMAT_MAX) {

10593 10594 10595 10596 10597
			/* Save a pointer to the name in the
			'file_format_name_map' constant array. */
			*static_cast<const char**>(save) =
			    trx_sys_file_format_id_to_name(format_id);

10598 10599 10600 10601
			return(0);
		}
	}

10602
	*static_cast<const char**>(save) = NULL;
10603 10604 10605
	return(1);
}

10606
/****************************************************************//**
10607 10608 10609
Update the system variable innodb_file_format using the "saved"
value. This function is registered as a callback with MySQL. */
static
10610
void
10611 10612
innodb_file_format_name_update(
/*===========================*/
10613 10614
	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
10615
							system variable */
10616
	void*				var_ptr,	/*!< out: where the
10617
							formal string goes */
10618
	const void*			save)		/*!< in: immediate result
10619 10620
							from check function */
{
10621 10622
	const char* format_name;

10623 10624 10625
	ut_a(var_ptr != NULL);
	ut_a(save != NULL);

10626 10627 10628 10629 10630 10631 10632 10633 10634 10635 10636
	format_name = *static_cast<const char*const*>(save);

	if (format_name) {
		uint	format_id;

		format_id = innobase_file_format_name_lookup(format_name);

		if (format_id <= DICT_TF_FORMAT_MAX) {
			srv_file_format = format_id;
		}
	}
10637

10638
	*static_cast<const char**>(var_ptr)
10639
		= trx_sys_file_format_id_to_name(srv_file_format);
10640
}
10641
/*************************************************************//**
10642 10643
Check if valid argument to innodb_file_format_max. This function
is registered as a callback with MySQL.
10644
@return	0 for valid file format */
10645 10646
static
int
10647 10648
innodb_file_format_max_validate(
/*============================*/
10649 10650
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
10651
						variable */
10652
	void*				save,	/*!< out: immediate result
10653
						for update function */
10654
	struct st_mysql_value*		value)	/*!< in: incoming string */
10655 10656 10657 10658
{
	const char*	file_format_input;
	char		buff[STRING_BUFFER_USUAL_SIZE];
	int		len = sizeof(buff);
10659
	int		format_id;
10660 10661 10662 10663 10664 10665 10666 10667

	ut_a(save != NULL);
	ut_a(value != NULL);

	file_format_input = value->val_str(value, buff, &len);

	if (file_format_input != NULL) {

10668 10669
		format_id = innobase_file_format_validate_and_set(
			file_format_input);
10670

10671 10672 10673 10674 10675 10676
		if (format_id >= 0) {
			/* Save a pointer to the name in the
			'file_format_name_map' constant array. */
			*static_cast<const char**>(save) =
			    trx_sys_file_format_id_to_name(
						(uint)format_id);
10677

10678
			return(0);
10679

10680 10681 10682 10683 10684 10685 10686 10687 10688
		} else {
			push_warning_printf(thd,
			  MYSQL_ERROR::WARN_LEVEL_WARN,
			  ER_WRONG_ARGUMENTS,
			  "InnoDB: invalid innodb_file_format_max "
			  "value; can be any format up to %s "
			  "or equivalent id of %d",
			  trx_sys_file_format_id_to_name(DICT_TF_FORMAT_MAX),
			  DICT_TF_FORMAT_MAX);
10689 10690 10691
		}
	}

10692
	*static_cast<const char**>(save) = NULL;
10693 10694 10695
	return(1);
}

10696
/****************************************************************//**
10697
Update the system variable innodb_file_format_max using the "saved"
10698 10699
value. This function is registered as a callback with MySQL. */
static
10700
void
10701 10702
innodb_file_format_max_update(
/*==========================*/
10703 10704
	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
10705
							system variable */
10706
	void*				var_ptr,	/*!< out: where the
10707
							formal string goes */
10708
	const void*			save)		/*!< in: immediate result
10709 10710
							from check function */
{
10711 10712 10713
	const char*	format_name_in;
	const char**	format_name_out;
	uint		format_id;
10714 10715 10716 10717

	ut_a(save != NULL);
	ut_a(var_ptr != NULL);

10718 10719 10720 10721 10722 10723 10724 10725 10726 10727 10728 10729 10730 10731 10732 10733 10734 10735 10736
	format_name_in = *static_cast<const char*const*>(save);

	if (!format_name_in) {

		return;
	}

	format_id = innobase_file_format_name_lookup(format_name_in);

	if (format_id > DICT_TF_FORMAT_MAX) {
		/* DEFAULT is "on", which is invalid at runtime. */
		push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				    ER_WRONG_ARGUMENTS,
				    "Ignoring SET innodb_file_format=%s",
				    format_name_in);
		return;
	}

	format_name_out = static_cast<const char**>(var_ptr);
10737 10738

	/* Update the max format id in the system tablespace. */
10739
	if (trx_sys_file_format_max_set(format_id, format_name_out)) {
10740 10741 10742
		ut_print_timestamp(stderr);
		fprintf(stderr,
			" [Info] InnoDB: the file format in the system "
10743
			"tablespace is now set to %s.\n", *format_name_out);
10744 10745 10746
	}
}

10747
/****************************************************************//**
10748 10749 10750 10751 10752 10753
Update the system variable innodb_adaptive_hash_index using the "saved"
value. This function is registered as a callback with MySQL. */
static
void
innodb_adaptive_hash_index_update(
/*==============================*/
10754 10755
	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
10756
							system variable */
10757
	void*				var_ptr,	/*!< out: where the
10758
							formal string goes */
10759
	const void*			save)		/*!< in: immediate result
10760 10761 10762 10763 10764 10765 10766 10767 10768
							from check function */
{
	if (*(my_bool*) save) {
		btr_search_enable();
	} else {
		btr_search_disable();
	}
}

10769 10770 10771 10772 10773 10774 10775 10776 10777 10778 10779 10780 10781 10782 10783 10784 10785 10786 10787
/****************************************************************//**
Update the system variable innodb_old_blocks_pct using the "saved"
value. This function is registered as a callback with MySQL. */
static
void
innodb_old_blocks_pct_update(
/*=========================*/
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to
						system variable */
	void*				var_ptr,/*!< out: where the
						formal string goes */
	const void*			save)	/*!< in: immediate result
						from check function */
{
	innobase_old_blocks_pct = buf_LRU_old_ratio_update(
		*static_cast<const uint*>(save), TRUE);
}

10788
/*************************************************************//**
10789 10790 10791 10792 10793 10794 10795 10796 10797 10798 10799 10800 10801 10802 10803 10804 10805 10806 10807 10808 10809 10810 10811 10812 10813 10814 10815 10816 10817
Find the corresponding ibuf_use_t value that indexes into
innobase_change_buffering_values[] array for the input
change buffering option name.
@return	corresponding IBUF_USE_* value for the input variable
name, or IBUF_USE_COUNT if not able to find a match */
static
ibuf_use_t
innodb_find_change_buffering_value(
/*===============================*/
	const char*	input_name)	/*!< in: input change buffering
					option name */
{
	ulint	use;

	for (use = 0; use < UT_ARR_SIZE(innobase_change_buffering_values);
	     use++) {
		/* found a match */
		if (!innobase_strcasecmp(
			input_name, innobase_change_buffering_values[use])) {
			return((ibuf_use_t)use);
		}
	}

	/* Did not find any match */
	return(IBUF_USE_COUNT);
}

/*************************************************************//**
Check if it is a valid value of innodb_change_buffering. This function is
10818 10819
registered as a callback with MySQL.
@return	0 for valid innodb_change_buffering */
10820 10821 10822
static
int
innodb_change_buffering_validate(
10823
/*=============================*/
10824 10825
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
10826
						variable */
10827
	void*				save,	/*!< out: immediate result
10828
						for update function */
10829
	struct st_mysql_value*		value)	/*!< in: incoming string */
10830 10831 10832 10833 10834 10835 10836 10837 10838 10839 10840
{
	const char*	change_buffering_input;
	char		buff[STRING_BUFFER_USUAL_SIZE];
	int		len = sizeof(buff);

	ut_a(save != NULL);
	ut_a(value != NULL);

	change_buffering_input = value->val_str(value, buff, &len);

	if (change_buffering_input != NULL) {
10841
		ibuf_use_t	use;
10842

10843 10844 10845 10846 10847 10848 10849 10850 10851
		use = innodb_find_change_buffering_value(
			change_buffering_input);

		if (use != IBUF_USE_COUNT) {
			/* Find a matching change_buffering option value. */
			*static_cast<const char**>(save) =
				innobase_change_buffering_values[use];

			return(0);
10852 10853 10854
		}
	}

10855 10856
	/* No corresponding change buffering option for user supplied
	"change_buffering_input" */
10857 10858 10859
	return(1);
}

10860
/****************************************************************//**
10861 10862 10863 10864 10865
Update the system variable innodb_change_buffering using the "saved"
value. This function is registered as a callback with MySQL. */
static
void
innodb_change_buffering_update(
10866
/*===========================*/
10867 10868 10869 10870 10871 10872 10873
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to
						system variable */
	void*				var_ptr,/*!< out: where the
						formal string goes */
	const void*			save)	/*!< in: immediate result
						from check function */
10874
{
10875 10876
	ibuf_use_t	use;

10877 10878 10879
	ut_a(var_ptr != NULL);
	ut_a(save != NULL);

10880 10881 10882 10883
	use = innodb_find_change_buffering_value(
		*static_cast<const char*const*>(save));

	ut_a(use < IBUF_USE_COUNT);
10884

10885 10886 10887
	ibuf_use = use;
	*static_cast<const char**>(var_ptr) =
		 *static_cast<const char*const*>(save);
10888 10889
}

10890 10891 10892 10893 10894 10895 10896 10897
static int show_innodb_vars(THD *thd, SHOW_VAR *var, char *buff)
{
  innodb_export_status();
  var->type= SHOW_ARRAY;
  var->value= (char *) &innodb_status_variables;
  return 0;
}

10898 10899 10900
/***********************************************************************
This function checks each index name for a table against reserved
system default primary index name 'GEN_CLUST_INDEX'. If a name matches,
10901 10902
this function pushes an warning message to the client, and returns true. */
extern "C" UNIV_INTERN
10903 10904 10905 10906 10907 10908
bool
innobase_index_name_is_reserved(
/*============================*/
					/* out: true if an index name
					matches the reserved name */
	const trx_t*	trx,		/* in: InnoDB transaction handle */
10909 10910 10911
	const KEY*	key_info,	/* in: Indexes to be created */
	ulint		num_of_keys)	/* in: Number of indexes to
					be created. */
10912
{
10913
	const KEY*	key;
10914 10915
	uint		key_num;	/* index number */

10916 10917
	for (key_num = 0; key_num < num_of_keys; key_num++) {
		key = &key_info[key_num];
10918 10919 10920 10921 10922

		if (innobase_strcasecmp(key->name,
					innobase_index_reserve_name) == 0) {
			/* Push warning to mysql */
			push_warning_printf((THD*) trx->mysql_thd,
10923 10924
					    MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_WRONG_NAME_FOR_INDEX,
10925 10926 10927 10928 10929 10930
					    "Cannot Create Index with name "
					    "'%s'. The name is reserved "
					    "for the system default primary "
					    "index.",
					    innobase_index_reserve_name);

10931 10932 10933
			my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0),
				 innobase_index_reserve_name);

10934 10935 10936 10937 10938 10939 10940
			return(true);
		}
	}

	return(false);
}

10941
static SHOW_VAR innodb_status_variables_export[]= {
10942 10943 10944 10945
  {"Innodb",                   (char*) &show_innodb_vars, SHOW_FUNC},
  {NullS, NullS, SHOW_LONG}
};

10946
static struct st_mysql_storage_engine innobase_storage_engine=
10947
{ MYSQL_HANDLERTON_INTERFACE_VERSION };
10948

10949 10950 10951 10952 10953 10954 10955 10956 10957 10958 10959 10960 10961 10962 10963 10964 10965 10966
/* plugin options */
static MYSQL_SYSVAR_BOOL(checksums, innobase_use_checksums,
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
  "Enable InnoDB checksums validation (enabled by default). "
  "Disable with --skip-innodb-checksums.",
  NULL, NULL, TRUE);

static MYSQL_SYSVAR_STR(data_home_dir, innobase_data_home_dir,
  PLUGIN_VAR_READONLY,
  "The common part for InnoDB table spaces.",
  NULL, NULL, NULL);

static MYSQL_SYSVAR_BOOL(doublewrite, innobase_use_doublewrite,
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
  "Enable InnoDB doublewrite buffer (enabled by default). "
  "Disable with --skip-innodb-doublewrite.",
  NULL, NULL, TRUE);

10967 10968 10969 10970 10971
static MYSQL_SYSVAR_ULONG(io_capacity, srv_io_capacity,
  PLUGIN_VAR_RQCMDARG,
  "Number of IOPs the server can do. Tunes the background IO rate",
  NULL, NULL, 200, 100, ~0L, 0);

10972 10973
static MYSQL_SYSVAR_ULONG(purge_batch_size, srv_purge_batch_size,
  PLUGIN_VAR_OPCMDARG,
10974
  "Number of UNDO log pages to purge in one batch from the history list.",
10975 10976 10977
  NULL, NULL,
  20,			/* Default setting */
  1,			/* Minimum value */
10978
  5000, 0);		/* Maximum value */
10979 10980 10981 10982 10983 10984 10985 10986

static MYSQL_SYSVAR_ULONG(rollback_segments, srv_rollback_segments,
  PLUGIN_VAR_OPCMDARG,
  "Number of UNDO logs to use.",
  NULL, NULL,
  128,			/* Default setting */
  1,			/* Minimum value */
  TRX_SYS_N_RSEGS, 0);	/* Maximum value */
10987 10988 10989

static MYSQL_SYSVAR_ULONG(purge_threads, srv_n_purge_threads,
  PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY,
10990
  "Purge threads can be either 0 or 1.",
10991 10992 10993 10994 10995
  NULL, NULL,
  0,			/* Default setting */
  0,			/* Minimum value */
  1, 0);		/* Maximum value */

10996 10997 10998
static MYSQL_SYSVAR_ULONG(fast_shutdown, innobase_fast_shutdown,
  PLUGIN_VAR_OPCMDARG,
  "Speeds up the shutdown process of the InnoDB storage engine. Possible "
10999 11000
  "values are 0, 1 (faster) or 2 (fastest - crash-like).",
  NULL, NULL, 1, 0, 2, 0);
11001

11002 11003
static MYSQL_SYSVAR_BOOL(file_per_table, srv_file_per_table,
  PLUGIN_VAR_NOCMDARG,
11004
  "Stores each InnoDB table to an .ibd file in the database dir.",
11005
  NULL, NULL, FALSE);
11006

11007 11008 11009
static MYSQL_SYSVAR_STR(file_format, innobase_file_format_name,
  PLUGIN_VAR_RQCMDARG,
  "File format to use for new tables in .ibd files.",
11010
  innodb_file_format_name_validate,
11011
  innodb_file_format_name_update, "Antelope");
11012

11013 11014 11015 11016 11017 11018 11019
/* "innobase_file_format_check" decides whether we would continue
booting the server if the file format stamped on the system
table space exceeds the maximum file format supported
by the server. Can be set during server startup at command
line or configure file, and a read only variable after
server startup */
static MYSQL_SYSVAR_BOOL(file_format_check, innobase_file_format_check,
11020
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
11021 11022 11023
  "Whether to perform system file format check.",
  NULL, NULL, TRUE);

11024 11025 11026 11027
/* If a new file format is introduced, the file format
name needs to be updated accordingly. Please refer to
file_format_name_map[] defined in trx0sys.c for the next
file format name. */
11028
static MYSQL_SYSVAR_STR(file_format_max, innobase_file_format_max,
11029 11030
  PLUGIN_VAR_OPCMDARG,
  "The highest file format in the tablespace.",
11031 11032
  innodb_file_format_max_validate,
  innodb_file_format_max_update, "Antelope");
11033

11034 11035 11036 11037 11038 11039 11040
static MYSQL_SYSVAR_ULONG(flush_log_at_trx_commit, srv_flush_log_at_trx_commit,
  PLUGIN_VAR_OPCMDARG,
  "Set to 0 (write and flush once per second),"
  " 1 (write and flush at each commit)"
  " or 2 (write at commit, flush once per second).",
  NULL, NULL, 1, 0, 2, 0);

11041
static MYSQL_SYSVAR_STR(flush_method, innobase_file_flush_method,
11042 11043 11044 11045 11046 11047 11048 11049 11050 11051 11052 11053 11054 11055 11056 11057 11058 11059 11060 11061 11062 11063 11064 11065 11066
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "With which method to flush data.", NULL, NULL, NULL);

static MYSQL_SYSVAR_BOOL(locks_unsafe_for_binlog, innobase_locks_unsafe_for_binlog,
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
  "Force InnoDB to not use next-key locking, to use only row-level locking.",
  NULL, NULL, FALSE);

#ifdef UNIV_LOG_ARCHIVE
static MYSQL_SYSVAR_STR(log_arch_dir, innobase_log_arch_dir,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Where full logs should be archived.", NULL, NULL, NULL);

static MYSQL_SYSVAR_BOOL(log_archive, innobase_log_archive,
  PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY,
  "Set to 1 if you want to have logs archived.", NULL, NULL, FALSE);
#endif /* UNIV_LOG_ARCHIVE */

static MYSQL_SYSVAR_STR(log_group_home_dir, innobase_log_group_home_dir,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Path to InnoDB log files.", NULL, NULL, NULL);

static MYSQL_SYSVAR_ULONG(max_dirty_pages_pct, srv_max_buf_pool_modified_pct,
  PLUGIN_VAR_RQCMDARG,
  "Percentage of dirty pages allowed in bufferpool.",
11067 11068 11069 11070 11071 11072
  NULL, NULL, 75, 0, 99, 0);

static MYSQL_SYSVAR_BOOL(adaptive_flushing, srv_adaptive_flushing,
  PLUGIN_VAR_NOCMDARG,
  "Attempt flushing dirty pages to avoid IO bursts at checkpoints.",
  NULL, NULL, TRUE);
11073 11074 11075 11076 11077 11078 11079 11080 11081 11082 11083 11084 11085 11086 11087 11088 11089

static MYSQL_SYSVAR_ULONG(max_purge_lag, srv_max_purge_lag,
  PLUGIN_VAR_RQCMDARG,
  "Desired maximum length of the purge queue (0 = no limit)",
  NULL, NULL, 0, 0, ~0L, 0);

static MYSQL_SYSVAR_BOOL(rollback_on_timeout, innobase_rollback_on_timeout,
  PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY,
  "Roll back the complete transaction on lock wait timeout, for 4.x compatibility (disabled by default)",
  NULL, NULL, FALSE);

static MYSQL_SYSVAR_BOOL(status_file, innobase_create_status_file,
  PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_NOSYSVAR,
  "Enable SHOW INNODB STATUS output in the innodb_status.<pid> file",
  NULL, NULL, FALSE);

static MYSQL_SYSVAR_BOOL(stats_on_metadata, innobase_stats_on_metadata,
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  PLUGIN_VAR_OPCMDARG,
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  "Enable statistics gathering for metadata commands such as SHOW TABLE STATUS (on by default)",
  NULL, NULL, TRUE);

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static MYSQL_SYSVAR_ULONGLONG(stats_sample_pages, srv_stats_sample_pages,
  PLUGIN_VAR_RQCMDARG,
  "The number of index pages to sample when calculating statistics (default 8)",
  NULL, NULL, 8, 1, ~0ULL, 0);

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static MYSQL_SYSVAR_BOOL(adaptive_hash_index, btr_search_enabled,
  PLUGIN_VAR_OPCMDARG,
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  "Enable InnoDB adaptive hash index (enabled by default).  "
  "Disable with --skip-innodb-adaptive-hash-index.",
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  NULL, innodb_adaptive_hash_index_update, TRUE);
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static MYSQL_SYSVAR_ULONG(replication_delay, srv_replication_delay,
  PLUGIN_VAR_RQCMDARG,
  "Replication thread delay (ms) on the slave server if "
  "innodb_thread_concurrency is reached (0 by default)",
  NULL, NULL, 0, 0, ~0UL, 0);

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static MYSQL_SYSVAR_LONG(additional_mem_pool_size, innobase_additional_mem_pool_size,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Size of a memory pool InnoDB uses to store data dictionary information and other internal data structures.",
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  NULL, NULL, 8*1024*1024L, 512*1024L, LONG_MAX, 1024);
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static MYSQL_SYSVAR_ULONG(autoextend_increment, srv_auto_extend_increment,
  PLUGIN_VAR_RQCMDARG,
  "Data file autoextend increment in megabytes",
  NULL, NULL, 8L, 1L, 1000L, 0);

static MYSQL_SYSVAR_LONGLONG(buffer_pool_size, innobase_buffer_pool_size,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "The size of the memory buffer InnoDB uses to cache data and indexes of its tables.",
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  NULL, NULL, 128*1024*1024L, 5*1024*1024L, LONGLONG_MAX, 1024*1024L);
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static MYSQL_SYSVAR_LONG(buffer_pool_instances, innobase_buffer_pool_instances,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of buffer pool instances, set to higher value on high-end machines to increase scalability",
  NULL, NULL, 1L, 1L, MAX_BUFFER_POOLS, 1L);

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static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency,
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  PLUGIN_VAR_RQCMDARG,
  "Helps in performance tuning in heavily concurrent environments.",
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  innobase_commit_concurrency_validate, NULL, 0, 0, 1000, 0);
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static MYSQL_SYSVAR_ULONG(concurrency_tickets, srv_n_free_tickets_to_enter,
  PLUGIN_VAR_RQCMDARG,
  "Number of times a thread is allowed to enter InnoDB within the same SQL query after it has once got the ticket",
  NULL, NULL, 500L, 1L, ~0L, 0);

static MYSQL_SYSVAR_LONG(file_io_threads, innobase_file_io_threads,
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  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY | PLUGIN_VAR_NOSYSVAR,
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  "Number of file I/O threads in InnoDB.",
  NULL, NULL, 4, 4, 64, 0);

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static MYSQL_SYSVAR_ULONG(read_io_threads, innobase_read_io_threads,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of background read I/O threads in InnoDB.",
  NULL, NULL, 4, 1, 64, 0);

static MYSQL_SYSVAR_ULONG(write_io_threads, innobase_write_io_threads,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of background write I/O threads in InnoDB.",
  NULL, NULL, 4, 1, 64, 0);

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static MYSQL_SYSVAR_LONG(force_recovery, innobase_force_recovery,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Helps to save your data in case the disk image of the database becomes corrupt.",
  NULL, NULL, 0, 0, 6, 0);

static MYSQL_SYSVAR_LONG(log_buffer_size, innobase_log_buffer_size,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "The size of the buffer which InnoDB uses to write log to the log files on disk.",
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  NULL, NULL, 8*1024*1024L, 256*1024L, LONG_MAX, 1024);
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static MYSQL_SYSVAR_LONGLONG(log_file_size, innobase_log_file_size,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Size of each log file in a log group.",
  NULL, NULL, 5*1024*1024L, 1*1024*1024L, LONGLONG_MAX, 1024*1024L);

static MYSQL_SYSVAR_LONG(log_files_in_group, innobase_log_files_in_group,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of log files in the log group. InnoDB writes to the files in a circular fashion. Value 3 is recommended here.",
  NULL, NULL, 2, 2, 100, 0);

static MYSQL_SYSVAR_LONG(mirrored_log_groups, innobase_mirrored_log_groups,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of identical copies of log groups we keep for the database. Currently this should be set to 1.",
  NULL, NULL, 1, 1, 10, 0);

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static MYSQL_SYSVAR_UINT(old_blocks_pct, innobase_old_blocks_pct,
  PLUGIN_VAR_RQCMDARG,
  "Percentage of the buffer pool to reserve for 'old' blocks.",
  NULL, innodb_old_blocks_pct_update, 100 * 3 / 8, 5, 95, 0);

static MYSQL_SYSVAR_UINT(old_blocks_time, buf_LRU_old_threshold_ms,
  PLUGIN_VAR_RQCMDARG,
  "Move blocks to the 'new' end of the buffer pool if the first access"
  " was at least this many milliseconds ago."
  " The timeout is disabled if 0 (the default).",
  NULL, NULL, 0, 0, UINT_MAX32, 0);

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static MYSQL_SYSVAR_LONG(open_files, innobase_open_files,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "How many files at the maximum InnoDB keeps open at the same time.",
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  NULL, NULL, 300L, 10L, LONG_MAX, 0);
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static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds,
  PLUGIN_VAR_RQCMDARG,
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  "Count of spin-loop rounds in InnoDB mutexes (30 by default)",
  NULL, NULL, 30L, 0L, ~0L, 0);
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static MYSQL_SYSVAR_ULONG(spin_wait_delay, srv_spin_wait_delay,
  PLUGIN_VAR_OPCMDARG,
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  "Maximum delay between polling for a spin lock (6 by default)",
  NULL, NULL, 6L, 0L, ~0L, 0);
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static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency,
  PLUGIN_VAR_RQCMDARG,
  "Helps in performance tuning in heavily concurrent environments. Sets the maximum number of threads allowed inside InnoDB. Value 0 will disable the thread throttling.",
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  NULL, NULL, 0, 0, 1000, 0);
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static MYSQL_SYSVAR_ULONG(thread_sleep_delay, srv_thread_sleep_delay,
  PLUGIN_VAR_RQCMDARG,
  "Time of innodb thread sleeping before joining InnoDB queue (usec). Value 0 disable a sleep",
  NULL, NULL, 10000L, 0L, ~0L, 0);

static MYSQL_SYSVAR_STR(data_file_path, innobase_data_file_path,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Path to individual files and their sizes.",
  NULL, NULL, NULL);

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static MYSQL_SYSVAR_LONG(autoinc_lock_mode, innobase_autoinc_lock_mode,
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  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
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  "The AUTOINC lock modes supported by InnoDB:               "
  "0 => Old style AUTOINC locking (for backward"
  " compatibility)                                           "
  "1 => New style AUTOINC locking                            "
  "2 => No AUTOINC locking (unsafe for SBR)",
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  NULL, NULL,
  AUTOINC_NEW_STYLE_LOCKING,	/* Default setting */
  AUTOINC_OLD_STYLE_LOCKING,	/* Minimum value */
  AUTOINC_NO_LOCKING, 0);	/* Maximum value */

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static MYSQL_SYSVAR_STR(version, innodb_version_str,
  PLUGIN_VAR_NOCMDOPT | PLUGIN_VAR_READONLY,
  "InnoDB version", NULL, NULL, INNODB_VERSION_STR);

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static MYSQL_SYSVAR_BOOL(use_sys_malloc, srv_use_sys_malloc,
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
  "Use OS memory allocator instead of InnoDB's internal memory allocator",
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  NULL, NULL, TRUE);
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static MYSQL_SYSVAR_BOOL(use_native_aio, srv_use_native_aio,
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
  "Use native AIO if supported on this platform.",
  NULL, NULL, TRUE);

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static MYSQL_SYSVAR_STR(change_buffering, innobase_change_buffering,
  PLUGIN_VAR_RQCMDARG,
  "Buffer changes to reduce random access: "
  "OFF, ON, inserting, deleting, changing, or purging.",
  innodb_change_buffering_validate,
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  innodb_change_buffering_update, "all");
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static MYSQL_SYSVAR_ENUM(stats_method, srv_innodb_stats_method,
   PLUGIN_VAR_RQCMDARG,
  "Specifies how InnoDB index statistics collection code should "
  "treat NULLs. Possible values are NULLS_EQUAL (default), "
  "NULLS_UNEQUAL and NULLS_IGNORED",
   NULL, NULL, SRV_STATS_NULLS_EQUAL, &innodb_stats_method_typelib);

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#if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG
static MYSQL_SYSVAR_UINT(change_buffering_debug, ibuf_debug,
  PLUGIN_VAR_RQCMDARG,
  "Debug flags for InnoDB change buffering (0=none)",
  NULL, NULL, 0, 0, 1, 0);
#endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */

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static MYSQL_SYSVAR_ULONG(read_ahead_threshold, srv_read_ahead_threshold,
  PLUGIN_VAR_RQCMDARG,
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  "Number of pages that must be accessed sequentially for InnoDB to "
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  "trigger a readahead.",
  NULL, NULL, 56, 0, 64, 0);

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static struct st_mysql_sys_var* innobase_system_variables[]= {
  MYSQL_SYSVAR(additional_mem_pool_size),
  MYSQL_SYSVAR(autoextend_increment),
  MYSQL_SYSVAR(buffer_pool_size),
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  MYSQL_SYSVAR(buffer_pool_instances),
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  MYSQL_SYSVAR(checksums),
  MYSQL_SYSVAR(commit_concurrency),
  MYSQL_SYSVAR(concurrency_tickets),
  MYSQL_SYSVAR(data_file_path),
  MYSQL_SYSVAR(data_home_dir),
  MYSQL_SYSVAR(doublewrite),
  MYSQL_SYSVAR(fast_shutdown),
  MYSQL_SYSVAR(file_io_threads),
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  MYSQL_SYSVAR(read_io_threads),
  MYSQL_SYSVAR(write_io_threads),
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  MYSQL_SYSVAR(file_per_table),
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  MYSQL_SYSVAR(file_format),
  MYSQL_SYSVAR(file_format_check),
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  MYSQL_SYSVAR(file_format_max),
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  MYSQL_SYSVAR(flush_log_at_trx_commit),
  MYSQL_SYSVAR(flush_method),
  MYSQL_SYSVAR(force_recovery),
  MYSQL_SYSVAR(locks_unsafe_for_binlog),
  MYSQL_SYSVAR(lock_wait_timeout),
#ifdef UNIV_LOG_ARCHIVE
  MYSQL_SYSVAR(log_arch_dir),
  MYSQL_SYSVAR(log_archive),
#endif /* UNIV_LOG_ARCHIVE */
  MYSQL_SYSVAR(log_buffer_size),
  MYSQL_SYSVAR(log_file_size),
  MYSQL_SYSVAR(log_files_in_group),
  MYSQL_SYSVAR(log_group_home_dir),
  MYSQL_SYSVAR(max_dirty_pages_pct),
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  MYSQL_SYSVAR(adaptive_flushing),
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  MYSQL_SYSVAR(max_purge_lag),
  MYSQL_SYSVAR(mirrored_log_groups),
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  MYSQL_SYSVAR(old_blocks_pct),
  MYSQL_SYSVAR(old_blocks_time),
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  MYSQL_SYSVAR(open_files),
  MYSQL_SYSVAR(rollback_on_timeout),
  MYSQL_SYSVAR(stats_on_metadata),
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  MYSQL_SYSVAR(stats_sample_pages),
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  MYSQL_SYSVAR(adaptive_hash_index),
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  MYSQL_SYSVAR(stats_method),
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  MYSQL_SYSVAR(replication_delay),
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  MYSQL_SYSVAR(status_file),
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  MYSQL_SYSVAR(strict_mode),
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  MYSQL_SYSVAR(support_xa),
  MYSQL_SYSVAR(sync_spin_loops),
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  MYSQL_SYSVAR(spin_wait_delay),
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  MYSQL_SYSVAR(table_locks),
  MYSQL_SYSVAR(thread_concurrency),
  MYSQL_SYSVAR(thread_sleep_delay),
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  MYSQL_SYSVAR(autoinc_lock_mode),
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  MYSQL_SYSVAR(version),
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  MYSQL_SYSVAR(use_sys_malloc),
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  MYSQL_SYSVAR(use_native_aio),
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  MYSQL_SYSVAR(change_buffering),
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#if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG
  MYSQL_SYSVAR(change_buffering_debug),
#endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */
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  MYSQL_SYSVAR(read_ahead_threshold),
  MYSQL_SYSVAR(io_capacity),
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  MYSQL_SYSVAR(purge_threads),
  MYSQL_SYSVAR(purge_batch_size),
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  MYSQL_SYSVAR(rollback_segments),
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  NULL
};

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mysql_declare_plugin(innobase)
{
  MYSQL_STORAGE_ENGINE_PLUGIN,
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  &innobase_storage_engine,
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  innobase_hton_name,
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  "Innobase Oy",
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  "Supports transactions, row-level locking, and foreign keys",
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  PLUGIN_LICENSE_GPL,
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  innobase_init, /* Plugin Init */
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  NULL, /* Plugin Deinit */
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  INNODB_VERSION_SHORT,
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  innodb_status_variables_export,/* status variables             */
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  innobase_system_variables, /* system variables */
  NULL /* reserved */
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},
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i_s_innodb_trx,
i_s_innodb_locks,
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i_s_innodb_lock_waits,
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i_s_innodb_cmp,
i_s_innodb_cmp_reset,
i_s_innodb_cmpmem,
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i_s_innodb_cmpmem_reset
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mysql_declare_plugin_end;
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/** @brief Initialize the default value of innodb_commit_concurrency.

Once InnoDB is running, the innodb_commit_concurrency must not change
from zero to nonzero. (Bug #42101)

The initial default value is 0, and without this extra initialization,
SET GLOBAL innodb_commit_concurrency=DEFAULT would set the parameter
to 0, even if it was initially set to nonzero at the command line
or configuration file. */
static
void
innobase_commit_concurrency_init_default(void)
/*==========================================*/
{
	MYSQL_SYSVAR_NAME(commit_concurrency).def_val
		= innobase_commit_concurrency;
}

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#ifdef UNIV_COMPILE_TEST_FUNCS

typedef struct innobase_convert_name_test_struct {
	char*		buf;
	ulint		buflen;
	const char*	id;
	ulint		idlen;
	void*		thd;
	ibool		file_id;

	const char*	expected;
} innobase_convert_name_test_t;

void
test_innobase_convert_name()
{
	char	buf[1024];
	ulint	i;

	innobase_convert_name_test_t test_input[] = {
		{buf, sizeof(buf), "abcd", 4, NULL, TRUE, "\"abcd\""},
		{buf, 7, "abcd", 4, NULL, TRUE, "\"abcd\""},
		{buf, 6, "abcd", 4, NULL, TRUE, "\"abcd\""},
		{buf, 5, "abcd", 4, NULL, TRUE, "\"abc\""},
		{buf, 4, "abcd", 4, NULL, TRUE, "\"ab\""},

		{buf, sizeof(buf), "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""},
		{buf, 9, "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""},
		{buf, 8, "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""},
		{buf, 7, "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""},
		{buf, 6, "ab@0060cd", 9, NULL, TRUE, "\"ab`c\""},
		{buf, 5, "ab@0060cd", 9, NULL, TRUE, "\"ab`\""},
		{buf, 4, "ab@0060cd", 9, NULL, TRUE, "\"ab\""},

		{buf, sizeof(buf), "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#ab\"\"cd\""},
		{buf, 17, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#ab\"\"cd\""},
		{buf, 16, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#ab\"\"c\""},
		{buf, 15, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#ab\"\"\""},
		{buf, 14, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#ab\""},
		{buf, 13, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#ab\""},
		{buf, 12, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#a\""},
		{buf, 11, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50#\""},
		{buf, 10, "ab\"cd", 5, NULL, TRUE,
			"\"#mysql50\""},

		{buf, sizeof(buf), "ab/cd", 5, NULL, TRUE, "\"ab\".\"cd\""},
		{buf, 9, "ab/cd", 5, NULL, TRUE, "\"ab\".\"cd\""},
		{buf, 8, "ab/cd", 5, NULL, TRUE, "\"ab\".\"c\""},
		{buf, 7, "ab/cd", 5, NULL, TRUE, "\"ab\".\"\""},
		{buf, 6, "ab/cd", 5, NULL, TRUE, "\"ab\"."},
		{buf, 5, "ab/cd", 5, NULL, TRUE, "\"ab\"."},
		{buf, 4, "ab/cd", 5, NULL, TRUE, "\"ab\""},
		{buf, 3, "ab/cd", 5, NULL, TRUE, "\"a\""},
		{buf, 2, "ab/cd", 5, NULL, TRUE, "\"\""},
		/* XXX probably "" is a better result in this case
		{buf, 1, "ab/cd", 5, NULL, TRUE, "."},
		*/
		{buf, 0, "ab/cd", 5, NULL, TRUE, ""},
	};

	for (i = 0; i < sizeof(test_input) / sizeof(test_input[0]); i++) {

		char*	end;
		ibool	ok = TRUE;
		size_t	res_len;

		fprintf(stderr, "TESTING %lu, %s, %lu, %s\n",
			test_input[i].buflen,
			test_input[i].id,
			test_input[i].idlen,
			test_input[i].expected);

		end = innobase_convert_name(
			test_input[i].buf,
			test_input[i].buflen,
			test_input[i].id,
			test_input[i].idlen,
			test_input[i].thd,
			test_input[i].file_id);

		res_len = (size_t) (end - test_input[i].buf);

		if (res_len != strlen(test_input[i].expected)) {

			fprintf(stderr, "unexpected len of the result: %u, "
				"expected: %u\n", (unsigned) res_len,
				(unsigned) strlen(test_input[i].expected));
			ok = FALSE;
		}

		if (memcmp(test_input[i].buf,
			   test_input[i].expected,
			   strlen(test_input[i].expected)) != 0
		    || !ok) {

			fprintf(stderr, "unexpected result: %.*s, "
				"expected: %s\n", (int) res_len,
				test_input[i].buf,
				test_input[i].expected);
			ok = FALSE;
		}

		if (ok) {
			fprintf(stderr, "OK: res: %.*s\n\n", (int) res_len,
				buf);
		} else {
			fprintf(stderr, "FAILED\n\n");
			return;
		}
	}
}

#endif /* UNIV_COMPILE_TEST_FUNCS */