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/*****************************************************************************

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Copyright (c) 2000, 2010, 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:
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  - Remove the flag trx->active_trans and look at trx->conc_state
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  - 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 <mysql_priv.h>
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#include <m_ctype.h>
#include <mysys_err.h>
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#include <mysql/plugin.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_SERVER
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# ifndef MYSQL_PLUGIN_IMPORT
#  define MYSQL_PLUGIN_IMPORT /* nothing */
# endif /* MYSQL_PLUGIN_IMPORT */
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#if MYSQL_VERSION_ID < 50124
/* this is defined in mysql_priv.h inside #ifdef MYSQL_SERVER
but we need it here */
bool check_global_access(THD *thd, ulong want_access);
#endif /* MYSQL_VERSION_ID < 50124 */
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#endif /* MYSQL_SERVER */

/** to protect innobase_open_files */
static pthread_mutex_t innobase_share_mutex;
/** to force correct commit order in binlog */
static pthread_mutex_t prepare_commit_mutex;
static ulong commit_threads = 0;
static pthread_mutex_t commit_threads_m;
static pthread_cond_t commit_cond;
static pthread_mutex_t commit_cond_m;
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 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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/* Note: This variable can be set to on/off and any of the supported
file formats in the configuration file, but can only be set to any
of the supported file formats during runtime. */
static char*	innobase_file_format_check		= 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;
#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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/* 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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#ifdef __NETWARE__	/* some special cleanup for NetWare */
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bool nw_panic = FALSE;
#endif

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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 */
};

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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
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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_check_file_format_at_startup variable.
@return	true if one of  "on" or "off" */
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static
bool
innobase_file_format_check_on_off(
/*==============================*/
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	const char*	format_check);		/*!< in: parameter value */
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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_check_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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/*================================*/
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	const char*	format_check);		/*!< 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.",
  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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/*******************************************************************//**
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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 */
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/*******************************************************************//**
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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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/*******************************************************************//**
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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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/*******************************************************************//**
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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 */
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/****************************************************************//**
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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 */
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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
bool innobase_show_status(handlerton *hton, THD* thd, 
                          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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  {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
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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);
}

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/******************************************************************//**
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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
ibool
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 */
{
	return(THDVAR((THD*) thd, support_xa));
}

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

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/********************************************************************//**
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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 */
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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();
	}
}

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/********************************************************************//**
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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 */
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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_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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		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;
	} else {
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		THD*	thd = current_thd;

		if (thd && thd_sql_command(thd) == SQLCOM_DROP_TABLE) {
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			/* 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 */
{
#if MYSQL_VERSION_ID >= 50142
	LEX_STRING* stmt;

	stmt = thd_query_string((THD*) mysql_thd);
	*length = stmt->length;
	return(stmt->str);
#else
	const char*	stmt_str = thd_query((THD*) mysql_thd);
	*length = strlen(stmt_str);
	return(stmt_str);
#endif
}

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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(). */
		fd2 = dup(fd);
		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) {
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		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. */
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		if (max_value - current <= increment) {
			next_value = max_value;
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		} else {
			next_value = current + increment;
		}
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	} else if (max_value > current) {
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		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. */
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		if (increment > (max_value / next_value)) {
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			next_value = max_value;
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		} else {
			next_value *= increment;

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			ut_a(max_value >= next_value);

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

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	ut_a(next_value <= max_value);

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	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
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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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/*********************************************************************//**
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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 that InnoDB takes part in an SQL statement, so that MySQL knows to
roll back the statement if the statement results in an error. This MUST be
called for every SQL statement that may be rolled back by MySQL. Calling this
several times to register the same statement is allowed, too. */
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static inline
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void
innobase_register_stmt(
/*===================*/
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        handlerton*	hton,	/*!< in: Innobase hton */
	THD*	thd)	/*!< in: MySQL thd (connection) object */
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{
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	DBUG_ASSERT(hton == innodb_hton_ptr);
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	/* Register the statement */
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	trans_register_ha(thd, FALSE, hton);
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}

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/*********************************************************************//**
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Registers an InnoDB transaction in MySQL, 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
innobase_register_trx_and_stmt(
/*===========================*/
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        handlerton *hton, /*!< in: Innobase handlerton */
	THD*	thd)	/*!< in: MySQL thd (connection) object */
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{
	/* NOTE that actually innobase_register_stmt() registers also
	the transaction in the AUTOCOMMIT=1 mode. */

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	innobase_register_stmt(hton, thd);
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	if (thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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		/* No autocommit mode, register for a transaction */
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		trans_register_ha(thd, TRUE, hton);
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	}
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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. */
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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);
	}
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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
	/* The call of row_search_.. will start a new transaction if it is
	not yet started */

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	if (trx->active_trans == 0) {
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		innobase_register_trx_and_stmt(innodb_hton_ptr, thd);
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		trx->active_trans = 1;
	}
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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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/*****************************************************************//**
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Invalidates the MySQL query cache for the table. */
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extern "C" UNIV_INTERN
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void
innobase_invalidate_query_cache(
/*============================*/
1650
	trx_t*		trx,		/*!< in: transaction which
1651
					modifies the table */
1652
	const char*	full_name,	/*!< in: concatenation of
1653 1654
					database name, null char NUL,
					table name, null char NUL;
1655 1656
					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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/*****************************************************************//**
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Convert an SQL identifier 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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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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#if MYSQL_VERSION_ID >= 50141
	char nz2[NAME_LEN + 1 + EXPLAIN_FILENAME_MAX_EXTRA_LENGTH];
#else /* MYSQL_VERSION_ID >= 50141 */
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	char nz2[NAME_LEN + 1 + sizeof srv_mysql50_table_name_prefix];
1694
#endif /* MYSQL_VERSION_ID >= 50141 */
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	const char*	s	= id;
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	int		q;

1699
	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. */
1703 1704 1705

		if (UNIV_UNLIKELY(idlen > (sizeof nz) - 1)) {
			idlen = (sizeof nz) - 1;
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		}

1708 1709
		memcpy(nz, id, idlen);
		nz[idlen] = 0;
1710

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		s = nz2;
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#if MYSQL_VERSION_ID >= 50141
		idlen = explain_filename((THD*) thd, nz, nz2, sizeof nz2,
					 EXPLAIN_PARTITIONS_AS_COMMENT);
		goto no_quote;
#else /* MYSQL_VERSION_ID >= 50141 */
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		idlen = filename_to_tablename(nz, nz2, sizeof nz2);
1718
#endif /* MYSQL_VERSION_ID >= 50141 */
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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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#if MYSQL_VERSION_ID >= 50141
no_quote:
#endif /* MYSQL_VERSION_ID >= 50141 */
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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;
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		}
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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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	}

1824 1825
	return(s);

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}

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/**********************************************************************//**
1829 1830
Determines if the currently running transaction has been interrupted.
@return	TRUE if interrupted */
1831
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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{
1837
	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));
}

1853
/**************************************************************//**
1854 1855 1856 1857 1858 1859
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(
/*===========*/
1860
	row_prebuilt_t*	prebuilt)	/*!< in/out: prebuilt struct */
1861 1862 1863 1864 1865
{
	prebuilt->keep_other_fields_on_keyread = 0;
	prebuilt->read_just_key = 0;
}

1866
/*****************************************************************//**
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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. */
1872
UNIV_INTERN
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1873 1874 1875 1876
void
ha_innobase::init_table_handle_for_HANDLER(void)
/*============================================*/
{
1877 1878 1879 1880
	/* 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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1881

1882
	update_thd(ha_thd());
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1883

1884 1885
	/* Initialize the prebuilt struct much like it would be inited in
	external_lock */
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1886 1887 1888

	innobase_release_stat_resources(prebuilt->trx);

1889
	/* If the transaction is not started yet, start it */
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1890

1891
	trx_start_if_not_started(prebuilt->trx);
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1892

1893
	/* Assign a read view if the transaction does not have it yet */
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1894

1895
	trx_assign_read_view(prebuilt->trx);
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	/* Set the MySQL flag to mark that there is an active transaction */

1899
	if (prebuilt->trx->active_trans == 0) {
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1900

1901
		innobase_register_trx_and_stmt(ht, user_thd);
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1902

1903 1904
		prebuilt->trx->active_trans = 1;
	}
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1905

1906 1907
	/* We did the necessary inits in this function, no need to repeat them
	in row_search_for_mysql */
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1908

1909
	prebuilt->sql_stat_start = FALSE;
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1910

1911 1912
	/* 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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1913

1914 1915
	prebuilt->select_lock_type = LOCK_NONE;
	prebuilt->stored_select_lock_type = LOCK_NONE;
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1916

1917
	/* Always fetch all columns in the index record */
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1918

1919
	prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
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1920

1921
	/* We want always to fetch all columns in the whole row? Or do
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1922 1923 1924
	we???? */

	prebuilt->used_in_HANDLER = TRUE;
1925
	reset_template(prebuilt);
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1926 1927
}

1928
/*********************************************************************//**
1929 1930
Opens an InnoDB database.
@return	0 on success, error code on failure */
1931
static
1932
int
1933 1934
innobase_init(
/*==========*/
1935
	void	*p)	/*!< in: InnoDB handlerton */
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1936
{
1937
	static char	current_dir[3];		/*!< Set if using current lib */
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1938 1939
	int		err;
	bool		ret;
1940
	char		*default_path;
1941
	uint		format_id;
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1942

1943
	DBUG_ENTER("innobase_init");
1944
        handlerton *innobase_hton= (handlerton *)p;
1945
        innodb_hton_ptr = innobase_hton;
1946

1947
        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;
1971
	innobase_hton->alter_table_flags = innobase_alter_table_flags;
1972

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1973 1974
	ut_a(DATA_MYSQL_TRUE_VARCHAR == (ulint)MYSQL_TYPE_VARCHAR);

1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992
#ifdef UNIV_DEBUG
	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,
			sizeof test_tablename)
			|| 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;
	}
#endif /* UNIV_DEBUG */

1993 1994
	/* Check that values don't overflow on 32-bit systems. */
	if (sizeof(ulint) == 4) {
1995
		if (innobase_buffer_pool_size > UINT_MAX32) {
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			sql_print_error(
				"innobase_buffer_pool_size can't be over 4GB"
				" on 32-bit systems");

2000
			goto error;
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		}

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

2008
			goto error;
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		}
	}

2012
	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 {
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		/* 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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2029 2030 2031 2032 2033
	}

	ut_a(default_path);

	if (specialflag & SPECIAL_NO_PRIOR) {
2034
		srv_set_thread_priorities = FALSE;
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2035
	} else {
2036 2037
		srv_set_thread_priorities = TRUE;
		srv_query_thread_priority = QUERY_PRIOR;
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	}

	/* 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
2051
	auto-extending. Thus users can use InnoDB in >= 4.0 without having
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2052 2053 2054
	to specify any startup options. */

	if (!innobase_data_file_path) {
2055
		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(
2065
		internal_innobase_data_file_path);
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2066
	if (ret == FALSE) {
2067
		sql_print_error(
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2068
			"InnoDB: syntax error in innodb_data_file_path");
2069
mem_free_and_error:
2070
		srv_free_paths_and_sizes();
2071
		my_free(internal_innobase_data_file_path,
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2072
						MYF(MY_ALLOW_ZERO_PTR));
2073
		goto error;
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	}

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

	/* The default dir for log files is the datadir of MySQL */
2079

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2080
	if (!innobase_log_group_home_dir) {
2081
		innobase_log_group_home_dir = default_path;
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	}

2084
#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)
2095
		srv_parse_log_group_home_dirs(innobase_log_group_home_dir);
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	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");

2101
		goto mem_free_and_error;
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	}

2104 2105 2106
	/* Validate the file format by animal name */
	if (innobase_file_format_name != NULL) {

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		format_id = innobase_file_format_name_lookup(
			innobase_file_format_name);
2109 2110 2111 2112 2113

		if (format_id > DICT_TF_FORMAT_MAX) {

			sql_print_error("InnoDB: wrong innodb_file_format.");

2114
			goto mem_free_and_error;
2115
		}
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	} else {
		/* Set it to the default file format id. Though this
		should never happen. */
		format_id = 0;
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	}

	srv_file_format = format_id;
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	/* 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. */

	innobase_file_format_name = 
		(char*) trx_sys_file_format_id_to_name(format_id);

	/* Process innobase_file_format_check variable */
	ut_a(innobase_file_format_check != NULL);

2135
	/* As a side effect it will set srv_check_file_format_at_startup
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	on valid input. First we check for "on"/"off". */
	if (!innobase_file_format_check_on_off(innobase_file_format_check)) {

		/* Did the user specify a format name that we support ?
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		As a side effect it will update the variable
		srv_check_file_format_at_startup */
2142 2143
		if (innobase_file_format_validate_and_set(
				innobase_file_format_check) < 0) {
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			sql_print_error("InnoDB: invalid "
					"innodb_file_format_check value: "
					"should be either 'on' or 'off' or "
2148
					"any value up to %s or its "
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					"equivalent numeric id",
					trx_sys_file_format_id_to_name(
						DICT_TF_FORMAT_MAX));

2153
			goto mem_free_and_error;
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		}
	}
2156

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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 "
2172
				"innodb_change_buffering=%s",
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				innobase_change_buffering);
		goto mem_free_and_error;
	}

innobase_change_buffering_inited_ok:
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	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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	/* --------------------------------------------------*/

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	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;

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	srv_buf_pool_size = (ulint) innobase_buffer_pool_size;

2197 2198
	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;

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	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
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	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
2212

2213 2214
	row_rollback_on_timeout = (ibool) innobase_rollback_on_timeout;

2215
	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);
2229
	ut_a(DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number);
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2230 2231 2232 2233 2234 2235

	/* 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. */

2236 2237
	ut_a(0 == strcmp(my_charset_latin1.name, "latin1_swedish_ci"));
	srv_latin1_ordering = my_charset_latin1.sort_order;
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2238

2239 2240 2241
	innobase_old_blocks_pct = buf_LRU_old_ratio_update(
		innobase_old_blocks_pct, FALSE);

2242 2243
	innobase_commit_concurrency_init_default();

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	/* Since we in this module access directly the fields of a trx
2245
	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) {
2253
		goto mem_free_and_error;
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	}

2256
	innobase_open_tables = hash_create(200);
2257 2258 2259 2260 2261
	pthread_mutex_init(&innobase_share_mutex, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&prepare_commit_mutex, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&commit_threads_m, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&commit_cond_m, MY_MUTEX_INIT_FAST);
	pthread_cond_init(&commit_cond, NULL);
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	innodb_inited= 1;
2263 2264 2265 2266 2267 2268
#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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	/* Get the current high water mark format. */
	innobase_file_format_check = (char*) trx_sys_file_format_max_get();

2273
	btr_search_fully_disabled = (!btr_search_enabled);
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	DBUG_RETURN(FALSE);
error:
2276
	DBUG_RETURN(TRUE);
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}

2279
/*******************************************************************//**
2280 2281
Closes an InnoDB database.
@return	TRUE if error */
2282
static
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2283
int
2284 2285
innobase_end(
/*=========*/
2286
	handlerton*		hton,	/*!< in/out: InnoDB handlerton */
2287
	ha_panic_function	type __attribute__((unused)))
2288
					/*!< in: ha_panic() parameter */
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{
	int	err= 0;

	DBUG_ENTER("innobase_end");
2293
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2294

2295
#ifdef __NETWARE__	/* some special cleanup for NetWare */
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	if (nw_panic) {
		set_panic_flag_for_netware();
	}
#endif
	if (innodb_inited) {

2302 2303
		srv_fast_shutdown = (ulint) innobase_fast_shutdown;
		innodb_inited = 0;
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		hash_table_free(innobase_open_tables);
		innobase_open_tables = NULL;
2306 2307
		if (innobase_shutdown_for_mysql() != DB_SUCCESS) {
			err = 1;
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2308
		}
2309
		srv_free_paths_and_sizes();
2310
		my_free(internal_innobase_data_file_path,
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						MYF(MY_ALLOW_ZERO_PTR));
2312 2313 2314 2315 2316
		pthread_mutex_destroy(&innobase_share_mutex);
		pthread_mutex_destroy(&prepare_commit_mutex);
		pthread_mutex_destroy(&commit_threads_m);
		pthread_mutex_destroy(&commit_cond_m);
		pthread_cond_destroy(&commit_cond);
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	}

2319
	DBUG_RETURN(err);
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}

2322
/****************************************************************//**
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2323
Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
2324 2325
the logs, and the name of this function should be innobase_checkpoint.
@return	TRUE if error */
2326
static
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2327
bool
2328 2329
innobase_flush_logs(
/*================*/
2330
	handlerton*	hton)	/*!< in/out: InnoDB handlerton */
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2331
{
2332
	bool	result = 0;
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2333

2334
	DBUG_ENTER("innobase_flush_logs");
2335
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2336 2337 2338

	log_buffer_flush_to_disk();

2339
	DBUG_RETURN(result);
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2340 2341
}

2342
/****************************************************************//**
2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356
Return alter table flags supported in an InnoDB database. */
static
uint
innobase_alter_table_flags(
/*=======================*/
	uint	flags)
{
	return(HA_ONLINE_ADD_INDEX_NO_WRITES
		| HA_ONLINE_DROP_INDEX_NO_WRITES
		| HA_ONLINE_ADD_UNIQUE_INDEX_NO_WRITES
		| HA_ONLINE_DROP_UNIQUE_INDEX_NO_WRITES
		| HA_ONLINE_ADD_PK_INDEX_NO_WRITES);
}

2357
/*****************************************************************//**
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2358
Commits a transaction in an InnoDB database. */
2359
static
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2360 2361 2362
void
innobase_commit_low(
/*================*/
2363
	trx_t*	trx)	/*!< in: transaction handle */
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2364
{
2365
	if (trx->conc_state == TRX_NOT_STARTED) {
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2366

2367 2368
		return;
	}
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	trx_commit_for_mysql(trx);
}

2373
/*****************************************************************//**
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2374 2375 2376
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
2377 2378
have one.
@return	0 */
2379
static
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2380 2381 2382
int
innobase_start_trx_and_assign_read_view(
/*====================================*/
2383 2384
        handlerton *hton, /*!< in: Innodb handlerton */ 
	THD*	thd)	/*!< in: MySQL thread handle of the user for whom
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2385 2386 2387 2388
			the transaction should be committed */
{
	trx_t*	trx;

2389
	DBUG_ENTER("innobase_start_trx_and_assign_read_view");
2390
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2391 2392 2393

	/* Create a new trx struct for thd, if it does not yet have one */

2394
	trx = check_trx_exists(thd);
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2395 2396 2397 2398 2399 2400 2401 2402 2403

	/* 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 */

2404
	trx_start_if_not_started(trx);
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2405 2406 2407 2408 2409 2410 2411

	/* 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 */

2412
	if (trx->active_trans == 0) {
2413
		innobase_register_trx_and_stmt(hton, thd);
2414 2415
		trx->active_trans = 1;
	}
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2416 2417 2418 2419

	DBUG_RETURN(0);
}

2420
/*****************************************************************//**
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2421
Commits a transaction in an InnoDB database or marks an SQL statement
2422 2423
ended.
@return	0 */
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2424 2425 2426 2427
static
int
innobase_commit(
/*============*/
2428 2429
        handlerton *hton, /*!< in: Innodb handlerton */ 
	THD* 	thd,	/*!< in: MySQL thread handle of the user for whom
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2430
			the transaction should be committed */
2431
	bool	all)	/*!< in:	TRUE - commit transaction
2432
				FALSE - the current SQL statement ended */
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2433 2434 2435
{
	trx_t*		trx;

2436
	DBUG_ENTER("innobase_commit");
2437
	DBUG_ASSERT(hton == innodb_hton_ptr);
2438
	DBUG_PRINT("trans", ("ending transaction"));
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2439

2440
	trx = check_trx_exists(thd);
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2441

2442 2443
	/* 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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2444

2445
	if (trx->has_search_latch) {
2446
		trx_search_latch_release_if_reserved(trx);
2447 2448 2449
	}

	/* The flag trx->active_trans is set to 1 in
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2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463

	1. ::external_lock(),
	2. ::start_stmt(),
	3. innobase_query_caching_of_table_permitted(),
	4. innobase_savepoint(),
	5. ::init_table_handle_for_HANDLER(),
	6. innobase_start_trx_and_assign_read_view(),
	7. ::transactional_table_lock()

	and it is only set to 0 in a commit or a rollback. If it is 0 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. */

2464 2465 2466 2467 2468
	if (trx->active_trans == 0
		&& trx->conc_state != TRX_NOT_STARTED) {

		sql_print_error("trx->active_trans == 0, but"
			" trx->conc_state != TRX_NOT_STARTED");
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2469
	}
2470
	if (all
2471
		|| (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
2472 2473

		/* We were instructed to commit the whole transaction, or
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2474 2475
		this is an SQL statement end and autocommit is on */

2476 2477 2478
		/* We need current binlog position for ibbackup to work.
		Note, the position is current because of
		prepare_commit_mutex */
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2479
retry:
2480
		if (innobase_commit_concurrency > 0) {
2481 2482 2483
			pthread_mutex_lock(&commit_cond_m);
			commit_threads++;

2484
			if (commit_threads > innobase_commit_concurrency) {
2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495
				commit_threads--;
				pthread_cond_wait(&commit_cond,
					&commit_cond_m);
				pthread_mutex_unlock(&commit_cond_m);
				goto retry;
			}
			else {
				pthread_mutex_unlock(&commit_cond_m);
			}
		}

2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508
		/* 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. */
2509
		trx->mysql_log_file_name = mysql_bin_log_file_name();
2510
		trx->mysql_log_offset = (ib_int64_t) mysql_bin_log_file_pos();
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2511

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inaam committed
2512 2513 2514 2515
		/* 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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2516
		innobase_commit_low(trx);
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2517
		trx->flush_log_later = FALSE;
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2518

2519
		if (innobase_commit_concurrency > 0) {
2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530
			pthread_mutex_lock(&commit_cond_m);
			commit_threads--;
			pthread_cond_signal(&commit_cond);
			pthread_mutex_unlock(&commit_cond_m);
		}

		if (trx->active_trans == 2) {

			pthread_mutex_unlock(&prepare_commit_mutex);
		}

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2531 2532
		/* Now do a write + flush of logs. */
		trx_commit_complete_for_mysql(trx);
2533 2534
		trx->active_trans = 0;

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osku committed
2535
	} else {
2536
		/* We just mark the SQL statement ended and do not do a
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2537 2538
		transaction commit */

2539 2540 2541 2542
		/* 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);
2543

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2544 2545 2546 2547 2548 2549 2550
		/* 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);
	}

2551 2552
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

2553
	if (trx->declared_to_be_inside_innodb) {
2554
		/* Release our possible ticket in the FIFO */
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2555

2556
		srv_conc_force_exit_innodb(trx);
2557
	}
2558 2559 2560

	/* Tell the InnoDB server that there might be work for utility
	threads: */
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2561 2562 2563 2564 2565
	srv_active_wake_master_thread();

	DBUG_RETURN(0);
}

2566
/*****************************************************************//**
2567 2568
Rolls back a transaction or the latest SQL statement.
@return	0 or error number */
2569 2570
static
int
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2571 2572
innobase_rollback(
/*==============*/
2573 2574
        handlerton *hton, /*!< in: Innodb handlerton */ 
	THD*	thd,	/*!< in: handle to the MySQL thread of the user
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2575
			whose transaction should be rolled back */
2576
	bool	all)	/*!< in:	TRUE - commit transaction
2577
				FALSE - the current SQL statement ended */
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2578 2579 2580 2581 2582
{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_rollback");
2583
	DBUG_ASSERT(hton == innodb_hton_ptr);
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osku committed
2584 2585
	DBUG_PRINT("trans", ("aborting transaction"));

2586
	trx = check_trx_exists(thd);
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2587 2588 2589 2590 2591 2592 2593

	/* 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);

2594 2595
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

2596 2597 2598
	/* 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 */
2599

2600
	row_unlock_table_autoinc_for_mysql(trx);
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osku committed
2601

2602
	if (all
2603
		|| !thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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2604 2605

		error = trx_rollback_for_mysql(trx);
2606
		trx->active_trans = 0;
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2607 2608 2609 2610
	} else {
		error = trx_rollback_last_sql_stat_for_mysql(trx);
	}

2611
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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2612 2613
}

2614
/*****************************************************************//**
2615 2616
Rolls back a transaction
@return	0 or error number */
2617
static
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2618 2619 2620
int
innobase_rollback_trx(
/*==================*/
2621
	trx_t*	trx)	/*!< in: transaction */
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2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633
{
	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);

2634 2635 2636
	/* 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 */
2637

2638
	row_unlock_table_autoinc_for_mysql(trx);
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osku committed
2639 2640 2641

	error = trx_rollback_for_mysql(trx);

2642
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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2643 2644
}

2645
/*****************************************************************//**
2646
Rolls back a transaction to a savepoint.
2647 2648
@return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the
given name */
2649 2650
static
int
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2651 2652
innobase_rollback_to_savepoint(
/*===========================*/
2653 2654
        handlerton *hton,       /*!< in: Innodb handlerton */ 
	THD*	thd,		/*!< in: handle to the MySQL thread of the user
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2655
				whose transaction should be rolled back */
2656
	void*	savepoint)	/*!< in: savepoint data */
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2657
{
2658
	ib_int64_t	mysql_binlog_cache_pos;
2659 2660 2661
	int		error = 0;
	trx_t*		trx;
	char		name[64];
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osku committed
2662 2663

	DBUG_ENTER("innobase_rollback_to_savepoint");
2664
	DBUG_ASSERT(hton == innodb_hton_ptr);
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2665

2666
	trx = check_trx_exists(thd);
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2667 2668 2669 2670 2671 2672 2673

	/* 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);

2674
	/* TODO: use provided savepoint data area to store savepoint data */
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2675

2676
	longlong2str((ulint)savepoint, name, 36);
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2677

2678
	error = (int) trx_rollback_to_savepoint_for_mysql(trx, name,
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2679
						&mysql_binlog_cache_pos);
2680
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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osku committed
2681 2682
}

2683
/*****************************************************************//**
2684
Release transaction savepoint name.
2685 2686
@return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the
given name */
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2687 2688 2689 2690
static
int
innobase_release_savepoint(
/*=======================*/
2691 2692
        handlerton*	hton,	/*!< in: handlerton for Innodb */
	THD*	thd,		/*!< in: handle to the MySQL thread of the user
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2693
				whose transaction should be rolled back */
2694
	void*	savepoint)	/*!< in: savepoint data */
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2695
{
2696 2697 2698
	int		error = 0;
	trx_t*		trx;
	char		name[64];
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	DBUG_ENTER("innobase_release_savepoint");
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	DBUG_ASSERT(hton == innodb_hton_ptr);
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	trx = check_trx_exists(thd);
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	/* TODO: use provided savepoint data area to store savepoint data */
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	longlong2str((ulint)savepoint, name, 36);
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	error = (int) trx_release_savepoint_for_mysql(trx, name);

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

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/*****************************************************************//**
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Sets a transaction savepoint.
@return	always 0, that is, always succeeds */
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static
int
innobase_savepoint(
/*===============*/
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	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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{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_savepoint");
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	DBUG_ASSERT(hton == innodb_hton_ptr);
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	/*
	  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.
	*/
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#ifdef MYSQL_SERVER /* plugins cannot access thd->in_sub_stmt */
	DBUG_ASSERT(thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) ||
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		thd->in_sub_stmt);
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#endif /* MYSQL_SERVER */
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	trx = check_trx_exists(thd);
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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);

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	/* cannot happen outside of transaction */
	DBUG_ASSERT(trx->active_trans);
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	/* TODO: use provided savepoint data area to store savepoint data */
	char name[64];
	longlong2str((ulint)savepoint,name,36);
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	error = (int) trx_savepoint_for_mysql(trx, name, (ib_int64_t)0);
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	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
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}

2761
/*****************************************************************//**
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Frees a possible InnoDB trx object associated with the current THD.
@return	0 or error number */
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static
int
innobase_close_connection(
/*======================*/
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        handlerton*	hton,	/*!< in:  innobase handlerton */
	THD*	thd)	/*!< in: handle to the MySQL thread of the user
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			whose resources should be free'd */
{
	trx_t*	trx;

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	DBUG_ENTER("innobase_close_connection");
	DBUG_ASSERT(hton == innodb_hton_ptr);
	trx = thd_to_trx(thd);
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	ut_a(trx);

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	if (trx->active_trans == 0
		&& trx->conc_state != TRX_NOT_STARTED) {

		sql_print_error("trx->active_trans == 0, but"
			" trx->conc_state != TRX_NOT_STARTED");
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	}


	if (trx->conc_state != TRX_NOT_STARTED &&
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		global_system_variables.log_warnings) {
		sql_print_warning(
			"MySQL is closing a connection that has an active "
			"InnoDB transaction.  %lu row modifications will "
			"roll back.",
			(ulong) trx->undo_no.low);
	}
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	innobase_rollback_trx(trx);

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	thr_local_free(trx->mysql_thread_id);
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	trx_free_for_mysql(trx);
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	DBUG_RETURN(0);
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}


2806
/*************************************************************************//**
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** InnoDB database tables
*****************************************************************************/

2810
/****************************************************************//**
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Get the record format from the data dictionary.
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@return one of ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT,
ROW_TYPE_COMPRESSED, ROW_TYPE_DYNAMIC */
2814
UNIV_INTERN
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enum row_type
ha_innobase::get_row_type() const
/*=============================*/
{
	if (prebuilt && prebuilt->table) {
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		const ulint	flags = prebuilt->table->flags;

		if (UNIV_UNLIKELY(!flags)) {
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			return(ROW_TYPE_REDUNDANT);
		}
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		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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	}
	ut_ad(0);
	return(ROW_TYPE_NOT_USED);
}

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2848
/****************************************************************//**
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Get the table flags to use for the statement.
@return	table flags */
2851
UNIV_INTERN
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handler::Table_flags
ha_innobase::table_flags() const
2854
/*============================*/
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{
       /* Need to use tx_isolation here since table flags is (also)
          called before prebuilt is inited. */
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        ulong const tx_isolation = thd_tx_isolation(ha_thd());
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        if (tx_isolation <= ISO_READ_COMMITTED)
                return int_table_flags;
        return int_table_flags | HA_BINLOG_STMT_CAPABLE;
}

2864
/****************************************************************//**
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Gives the file extension of an InnoDB single-table tablespace. */
static const char* ha_innobase_exts[] = {
  ".ibd",
  NullS
};

2871
/****************************************************************//**
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Returns the table type (storage engine name).
@return	table type */
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UNIV_INTERN
const char*
ha_innobase::table_type() const
/*===========================*/
{
	return(innobase_hton_name);
}

2882
/****************************************************************//**
2883
Returns the index type. */
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UNIV_INTERN
const char*
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ha_innobase::index_type(
/*====================*/
	uint)
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				/*!< out: index type */
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{
	return("BTREE");
}

2894
/****************************************************************//**
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Returns the table file name extension.
@return	file extension string */
2897
UNIV_INTERN
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const char**
ha_innobase::bas_ext() const
/*========================*/
{
2902
	return(ha_innobase_exts);
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}

2905
/****************************************************************//**
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Returns the operations supported for indexes.
@return	flags of supported operations */
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UNIV_INTERN
ulong
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ha_innobase::index_flags(
/*=====================*/
	uint,
	uint,
	bool)
const
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{
	return(HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER
	       | HA_READ_RANGE | HA_KEYREAD_ONLY);
}

2921
/****************************************************************//**
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Returns the maximum number of keys.
@return	MAX_KEY */
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UNIV_INTERN
uint
ha_innobase::max_supported_keys() const
2927
/*===================================*/
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{
	return(MAX_KEY);
}

2932
/****************************************************************//**
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Returns the maximum key length.
@return	maximum supported key length, in bytes */
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UNIV_INTERN
uint
ha_innobase::max_supported_key_length() const
2938
/*=========================================*/
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{
	/* 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);
}

2948
/****************************************************************//**
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Returns the key map of keys that are usable for scanning.
@return	key_map_full */
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UNIV_INTERN
const key_map*
ha_innobase::keys_to_use_for_scanning()
{
	return(&key_map_full);
}

2958
/****************************************************************//**
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Determines if table caching is supported.
@return	HA_CACHE_TBL_ASKTRANSACT */
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UNIV_INTERN
uint8
ha_innobase::table_cache_type()
{
	return(HA_CACHE_TBL_ASKTRANSACT);
}

2968
/****************************************************************//**
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Determines if the primary key is clustered index.
@return	true */
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UNIV_INTERN
bool
ha_innobase::primary_key_is_clustered()
{
	return(true);
}
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2978
/*****************************************************************//**
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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(
/*=================*/
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	char*		norm_name,	/*!< out: normalized name as a
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					null-terminated string */
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	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
}

3024
/********************************************************************//**
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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");

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

	index_mapping = share->idx_trans_tbl.index_mapping;

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	/* 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;
	}

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	/* 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) {
			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. */
		my_free(index_mapping, MYF(MY_ALLOW_ZERO_PTR));

		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;

	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]);
}

3294
/************************************************************************
3295
Set the autoinc column max value. This should only be called once from
3296
ha_innobase::open(). Therefore there's no need for a covering lock. */
3297
UNIV_INTERN
3298
void
3299 3300 3301 3302
ha_innobase::innobase_initialize_autoinc()
/*======================================*/
{
	ulonglong	auto_inc;
3303
	const Field*	field = table->found_next_number_field;
3304

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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
3309 3310 3311
		autoinc column. We set it to the 0, effectively disabling
		updates to the table. */
		auto_inc = 0;
3312 3313

		ut_print_timestamp(stderr);
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		fprintf(stderr, "  InnoDB: Unable to determine the AUTOINC "
				"column name\n");
	}
3317

3318 3319
	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {
		/* If the recovery level is set so high that writes
3320
		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. */
3329
		auto_inc = 0;
3330
	} 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());
3341 3342 3343

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

3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363
		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) {
		case DB_SUCCESS:
			/* At the this stage we do not know the increment
			or the offset, so use a default increment of 1. */
			auto_inc = read_auto_inc + 1;
			break;

		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 "
3364
				"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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	}

3388
	dict_table_autoinc_initialize(prebuilt->table, auto_inc);
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}

3391
/*****************************************************************//**
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3392
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 */
3395
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;
3404
	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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	/* 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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3448

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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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3456
	/* Get pointer to a table object in InnoDB dictionary cache */
3457
	ib_table = dict_table_get(norm_name, TRUE);
3458
	
3459
	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"
3484
				"See " REFMAN "innodb-troubleshooting.html\n"
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				"how you can resolve the problem.\n",
				norm_name);
3487
		free_share(share);
3488
		my_free(upd_buff, MYF(0));
3489
		my_errno = ENOENT;
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		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
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3493

3494
	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"
3500
				"See " REFMAN "innodb-troubleshooting.html\n"
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				"how you can resolve the problem.\n",
				norm_name);
3503
		free_share(share);
3504
		my_free(upd_buff, MYF(0));
3505
		my_errno = ENOENT;
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3507
		dict_table_decrement_handle_count(ib_table, FALSE);
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		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
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3510

3511
	prebuilt = row_create_prebuilt(ib_table);
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3513
	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 */

3519
	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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3533
	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. */

			ref_length = table->key_info[primary_key].key_length;
		}
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	} else {
3592
		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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		}

3616
		prebuilt->clust_index_was_generated = TRUE;
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3617

3618
		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. */
3627

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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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3636 3637
	/* 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(
			(const char**) &innobase_file_format_check,
			dict_table_get_format(prebuilt->table));
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	}

3651
	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
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3652

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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) {

3663
			innobase_initialize_autoinc();
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		}

		dict_table_autoinc_unlock(prebuilt->table);
	}

3669
	DBUG_RETURN(0);
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3670 3671
}

3672
UNIV_INTERN
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uint
ha_innobase::max_supported_key_part_length() const
{
	return(DICT_MAX_INDEX_COL_LEN - 1);
}

3679
/******************************************************************//**
3680 3681
Closes a handle to an InnoDB table.
@return	0 */
3682
UNIV_INTERN
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3683 3684 3685 3686
int
ha_innobase::close(void)
/*====================*/
{
3687 3688
	THD*	thd;

3689
	DBUG_ENTER("ha_innobase::close");
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3690

3691
	thd = ha_thd();
3692 3693 3694 3695
	if (thd != NULL) {
		innobase_release_temporary_latches(ht, thd);
	}

3696
	row_prebuilt_free(prebuilt, FALSE);
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3697

3698
	my_free(upd_buff, MYF(0));
3699
	free_share(share);
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3700 3701 3702 3703 3704 3705

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

	srv_active_wake_master_thread();

3706
	DBUG_RETURN(0);
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}

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

3711
/**************************************************************//**
3712 3713
Gets field offset for a field in a table.
@return	offset */
3714
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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3720
{
3721
	return((uint) (field->ptr - table->record[0]));
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3722 3723
}

3724
/**************************************************************//**
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3725
Checks if a field in a record is SQL NULL. Uses the record format
3726 3727
information in table to track the null bit in record.
@return	1 if NULL, 0 otherwise */
3728
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);
}

3754
/**************************************************************//**
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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. */
3757
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;
}

3773
/*************************************************************//**
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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 */
3779
extern "C" UNIV_INTERN
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int
innobase_mysql_cmp(
/*===============*/
3783 3784 3785 3786
	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;
3794
	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) {

3803
	case MYSQL_TYPE_BIT:
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3804 3805
	case MYSQL_TYPE_STRING:
	case MYSQL_TYPE_VAR_STRING:
3806 3807 3808 3809
	case MYSQL_TYPE_TINY_BLOB:
	case MYSQL_TYPE_MEDIUM_BLOB:
	case MYSQL_TYPE_BLOB:
	case MYSQL_TYPE_LONG_BLOB:
3810
	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) {
3841
			return(-1);
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		} else if (ret > 0) {
3843
			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);
}

3854
/**************************************************************//**
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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, ... */
3859
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);
		}
3928
	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:
3941
		return(DATA_INT);
3942
	case MYSQL_TYPE_FLOAT:
3943
		return(DATA_FLOAT);
3944
	case MYSQL_TYPE_DOUBLE:
3945
		return(DATA_DOUBLE);
3946
	case MYSQL_TYPE_DECIMAL:
3947
		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:
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		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;
3959
	default:
3960
		ut_error;
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	}

	return(0);
}

3966
/*******************************************************************//**
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Writes an unsigned integer value < 64k to 2 bytes, in the little-endian
storage format. */
3969
static inline
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void
innobase_write_to_2_little_endian(
/*==============================*/
3973 3974
	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);
}

3982
/*******************************************************************//**
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3983
Reads an unsigned integer value < 64k from 2 bytes, in the little-endian
3984 3985
storage format.
@return	value */
3986
static inline
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uint
innobase_read_from_2_little_endian(
/*===============================*/
3990
	const uchar*	buf)	/*!< in: from where to read */
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{
	return (uint) ((ulint)(buf[0]) + 256 * ((ulint)(buf[1])));
}

3995
/*******************************************************************//**
3996 3997
Stores a key value for a row to a buffer.
@return	key value length as stored in buff */
3998
UNIV_INTERN
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uint
ha_innobase::store_key_val_for_row(
/*===============================*/
4002 4003
	uint		keynr,	/*!< in: key number */
	char*		buff,	/*!< in/out: buffer for the key value (in MySQL
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				format) */
4005 4006
	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;

4016
	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);

4045 4046
	for (; key_part != end; key_part++) {
		is_null = FALSE;
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4047

4048 4049
		if (key_part->null_bit) {
			if (record[key_part->null_offset]
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						& key_part->null_bit) {
				*buff = 1;
				is_null = TRUE;
4053
			} else {
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				*buff = 0;
			}
			buff++;
4057
		}
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4058 4059 4060 4061 4062 4063

		field = key_part->field;
		mysql_type = field->type();

		if (mysql_type == MYSQL_TYPE_VARCHAR) {
						/* >= 5.0.3 true VARCHAR */
4064 4065 4066 4067 4068
			ulint		lenlen;
			ulint		len;
			const byte*	data;
			ulint		key_len;
			ulint		true_len;
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			CHARSET_INFO*	cs;
4070
			int		error=0;
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4072 4073
			key_len = key_part->length;

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4074
			if (is_null) {
4075
				buff += key_len + 2;
4076

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				continue;
			}
4079
			cs = field->charset();
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			lenlen = (ulint)
				(((Field_varstring*)field)->length_bytes);

4084
			data = row_mysql_read_true_varchar(&len,
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				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
				lenlen);

4089 4090 4091 4092 4093 4094 4095 4096 4097
			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,
4098 4099
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
4100 4101 4102
						&error);
			}

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

4106 4107
			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 */

4113
			row_mysql_store_true_var_len((byte*)buff, true_len, 2);
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			buff += 2;

4116
			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. */

4124
			buff += key_len;
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4125

4126 4127 4128
		} 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;
4136
			ulint		true_len;
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4137
			int		error=0;
4138
			ulint		blob_len;
4139
			const byte*	blob_data;
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4140 4141 4142

			ut_a(key_part->key_part_flag & HA_PART_KEY_SEG);

4143 4144
			key_len = key_part->length;

4145
			if (is_null) {
4146
				buff += key_len + 2;
4147

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4148 4149
				continue;
			}
4150

4151 4152
			cs = field->charset();

4153
			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());

4158 4159
			true_len = blob_len;

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4160
			ut_a(get_field_offset(table, field)
4161
				== key_part->offset);
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4162

4163 4164
			/* For multi byte character sets we need to calculate
			the true length of the key */
4165

4166 4167 4168
			if (blob_len > 0 && cs->mbmaxlen > 1) {
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) blob_data,
4169
						(const char *) blob_data
4170
							+ blob_len,
4171 4172
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
4173 4174 4175
						&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: */

4180 4181
			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(
4188
					(byte*)buff, true_len);
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4189 4190
			buff += 2;

4191
			memcpy(buff, blob_data, true_len);
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4192 4193 4194 4195

			/* Note that we always reserve the maximum possible
			length of the BLOB prefix in the key value. */

4196
			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;
4204 4205
			ulint			true_len;
			ulint			key_len;
4206
			const uchar*		src_start;
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4207
			int			error=0;
4208 4209 4210
			enum_field_types	real_type;

			key_len = key_part->length;
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4211

4212
			if (is_null) {
4213
				 buff += key_len;
4214

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				 continue;
			}

			src_start = record + key_part->offset;
4219 4220
			real_type = field->real_type();
			true_len = key_len;
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4221

4222 4223 4224 4225 4226
			/* 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. */

4227 4228
			if (real_type != MYSQL_TYPE_ENUM
				&& real_type != MYSQL_TYPE_SET
4229 4230 4231 4232 4233
				&& ( mysql_type == MYSQL_TYPE_VAR_STRING
					|| mysql_type == MYSQL_TYPE_STRING)) {

				cs = field->charset();

4234
				/* For multi byte character sets we need to
4235 4236 4237 4238
				calculate the true length of the key */

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

4239
					true_len = (ulint)
4240 4241
						cs->cset->well_formed_len(cs,
							(const char *)src_start,
4242
							(const char *)src_start
4243
								+ key_len,
4244 4245
                                                        (uint) (key_len /
                                                                cs->mbmaxlen),
4246 4247
							&error);
				}
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4248 4249
			}

4250 4251
			memcpy(buff, src_start, true_len);
			buff += true_len;
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4252

4253 4254 4255
			/* Pad the unused space with spaces. Note that no
			padding is ever needed for UCS-2 because in MySQL,
			all UCS2 characters are 2 bytes, as MySQL does not
4256 4257
			support surrogate pairs, which are needed to represent
			characters in the range U+10000 to U+10FFFF. */
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4258

4259 4260 4261 4262
			if (true_len < key_len) {
				ulint pad_len = key_len - true_len;
				memset(buff, ' ', pad_len);
				buff += pad_len;
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4263 4264
			}
		}
4265
	}
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4266 4267 4268 4269 4270 4271

	ut_a(buff <= buff_start + buff_len);

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

4272
/**************************************************************//**
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4273 4274
Builds a 'template' to the prebuilt struct. The template is used in fast
retrieval of just those column values MySQL needs in its processing. */
4275
static
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4276
void
4277
build_template(
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4278
/*===========*/
4279 4280
	row_prebuilt_t*	prebuilt,	/*!< in/out: prebuilt struct */
	THD*		thd,		/*!< in: current user thread, used
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4281 4282
					only if templ_type is
					ROW_MYSQL_REC_FIELDS */
4283 4284
	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. */

4304
		templ_type = ROW_MYSQL_WHOLE_ROW;
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4305 4306 4307
	}

	if (templ_type == ROW_MYSQL_REC_FIELDS) {
4308 4309
		if (prebuilt->hint_need_to_fetch_extra_cols
			== ROW_RETRIEVE_ALL_COLS) {
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4310

4311 4312
			/* We know we must at least fetch all columns in the
			key, or all columns in the table */
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4314 4315 4316 4317 4318 4319 4320
			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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4321

4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335
				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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		}
	}

4339
	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*)
4359
			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++) {
		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;
			}

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			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
4400 4401
				&& 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;

		if (index == clust_index) {
4417
			templ->rec_field_no = dict_col_get_clust_pos(
4418
				&index->table->cols[i], index);
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		} else {
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
		}

		if (templ->rec_field_no == ULINT_UNDEFINED) {
			prebuilt->need_to_access_clustered = TRUE;
		}

		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;
		}
4447
		templ->type = index->table->cols[i].mtype;
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		templ->mysql_type = (ulint)field->type();

		if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR) {
			templ->mysql_length_bytes = (ulint)
4452
				(((Field_varstring*)field)->length_bytes);
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4453
		}
4454

4455 4456
		templ->charset = dtype_get_charset_coll(
			index->table->cols[i].prtype);
4457 4458 4459
		templ->mbminlen = index->table->cols[i].mbminlen;
		templ->mbmaxlen = index->table->cols[i].mbmaxlen;
		templ->is_unsigned = index->table->cols[i].prtype
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							& DATA_UNSIGNED;
		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;

4477
			templ->rec_field_no = dict_col_get_clust_pos(
4478 4479
				&index->table->cols[templ->col_no],
				clust_index);
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		}
	}
}

4484
/********************************************************************//**
4485 4486 4487 4488
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
4489 4490
the special lock handling.
@return	DB_SUCCESS if all OK else error code */
4491
UNIV_INTERN
4492
ulint
4493
ha_innobase::innobase_lock_autoinc(void)
4494 4495 4496 4497
/*====================================*/
{
	ulint		error = DB_SUCCESS;

4498 4499 4500
	switch (innobase_autoinc_lock_mode) {
	case AUTOINC_NO_LOCKING:
		/* Acquire only the AUTOINC mutex. */
4501
		dict_table_autoinc_lock(prebuilt->table);
4502
		break;
4503

4504 4505 4506 4507 4508
	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. */
4509 4510
		if (thd_sql_command(user_thd) == SQLCOM_INSERT
		    || thd_sql_command(user_thd) == SQLCOM_REPLACE) {
4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523
			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;
			}
4524
		}
4525 4526 4527
		/* Fall through to old style locking. */

	case AUTOINC_OLD_STYLE_LOCKING:
4528 4529 4530
		error = row_lock_table_autoinc_for_mysql(prebuilt);

		if (error == DB_SUCCESS) {
4531 4532

			/* Acquire the AUTOINC mutex. */
4533 4534
			dict_table_autoinc_lock(prebuilt->table);
		}
4535 4536 4537 4538
		break;

	default:
		ut_error;
4539 4540 4541 4542 4543
	}

	return(ulong(error));
}

4544
/********************************************************************//**
4545 4546
Reset the autoinc value in the table.
@return	DB_SUCCESS if all went well else error code */
4547
UNIV_INTERN
4548
ulint
4549 4550
ha_innobase::innobase_reset_autoinc(
/*================================*/
4551
	ulonglong	autoinc)	/*!< in: value to store */
4552 4553 4554
{
	ulint		error;

4555
	error = innobase_lock_autoinc();
4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566

	if (error == DB_SUCCESS) {

		dict_table_autoinc_initialize(prebuilt->table, autoinc);

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

4567
/********************************************************************//**
4568
Store the autoinc value in the table. The autoinc value is only set if
4569
it's greater than the existing autoinc value in the table.
4570
@return	DB_SUCCESS if all went well else error code */
4571
UNIV_INTERN
4572
ulint
4573 4574
ha_innobase::innobase_set_max_autoinc(
/*==================================*/
4575
	ulonglong	auto_inc)	/*!< in: value to store */
4576 4577 4578
{
	ulint		error;

4579
	error = innobase_lock_autoinc();
4580 4581 4582

	if (error == DB_SUCCESS) {

4583
		dict_table_autoinc_update_if_greater(prebuilt->table, auto_inc);
4584 4585 4586 4587 4588 4589 4590

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

4591
/********************************************************************//**
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4592
Stores a row in an InnoDB database, to the table specified in this
4593 4594
handle.
@return	error code */
4595
UNIV_INTERN
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int
ha_innobase::write_row(
/*===================*/
4599
	uchar*	record)	/*!< in: a row in MySQL format */
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4600
{
4601 4602
	ulint		error = 0;
        int             error_result= 0;
4603
	ibool		auto_inc_used= FALSE;
4604 4605
	ulint		sql_command;
	trx_t*		trx = thd_to_trx(user_thd);
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4606

4607
	DBUG_ENTER("ha_innobase::write_row");
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4608

4609
	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",
4612
			  (const void*) prebuilt->trx, (const void*) trx);
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		fputs("InnoDB: Dump of 200 bytes around prebuilt: ", stderr);
		ut_print_buf(stderr, ((const byte*)prebuilt) - 100, 200);
		fputs("\n"
4617
			"InnoDB: Dump of 200 bytes around ha_data: ",
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4618
			stderr);
4619
		ut_print_buf(stderr, ((const byte*) trx) - 100, 200);
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		putc('\n', stderr);
		ut_error;
	}

4624
	ha_statistic_increment(&SSV::ha_write_count);
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4625

4626 4627
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
		table->timestamp_field->set_time();
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4628

4629 4630 4631 4632 4633 4634 4635
	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;
4646
		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,
4663
				"  InnoDB: ALTER TABLE is holding lock"
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4664 4665 4666 4667 4668 4669 4670 4671 4672
				" 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 */
4673
			innobase_commit(ht, user_thd, 1);
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			/* Note that this transaction is still active. */
			prebuilt->trx->active_trans = 1;
			/* We will need an IX lock on the destination table. */
4677
			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. */
4689
			innobase_commit(ht, user_thd, 1);
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			/* Note that this transaction is still active. */
			prebuilt->trx->active_trans = 1;
			/* 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. */
4695
			prebuilt->sql_stat_start = TRUE;
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		}
	}

	num_write_row++;

4701
	/* This is the case where the table has an auto-increment column */
4702
	if (table->next_number_field && record == table->record[0]) {
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4703

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4704 4705 4706 4707
		/* Reset the error code before calling
		innobase_get_auto_increment(). */
		prebuilt->autoinc_error = DB_SUCCESS;

4708
		if ((error = update_auto_increment())) {
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4709 4710
			/* We don't want to mask autoinc overflow errors. */

4711 4712 4713 4714 4715 4716 4717 4718 4719
			/* 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;
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				goto report_error;
			}

			/* MySQL errors are passed straight back. */
4724
			error_result = (int) error;
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			goto func_exit;
		}

4728
		auto_inc_used = TRUE;
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	}

	if (prebuilt->mysql_template == NULL
4732 4733
	    || 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);

4744 4745
	/* Handle duplicate key errors */
	if (auto_inc_used) {
4746
		ulint		err;
4747
		ulonglong	auto_inc;
4748
		ulonglong	col_max_value;
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4749

4750 4751 4752 4753 4754 4755 4756
		/* 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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4757

4758 4759 4760 4761 4762
		/* 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);

4763
		/* Get the value that MySQL attempted to store in the table.*/
4764
		auto_inc = table->next_number_field->val_int();
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4765

4766 4767
		switch (error) {
		case DB_DUPLICATE_KEY:
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4768

4769 4770 4771 4772
			/* 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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4773

4774 4775 4776 4777
			switch (sql_command) {
			case SQLCOM_LOAD:
				if ((trx->duplicates
				    & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))) {
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4778

4779 4780 4781
					goto set_max_autoinc;
				}
				break;
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4782

4783 4784 4785 4786
			case SQLCOM_REPLACE:
			case SQLCOM_INSERT_SELECT:
			case SQLCOM_REPLACE_SELECT:
				goto set_max_autoinc;
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4787

4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799
			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.*/

4800
			if (auto_inc >= prebuilt->autoinc_last_value) {
4801
set_max_autoinc:
4802 4803 4804 4805
				/* This should filter out the negative
				values set explicitly by the user. */
				if (auto_inc <= col_max_value) {
					ut_a(prebuilt->autoinc_increment > 0);
4806

4807 4808
					ulonglong	need;
					ulonglong	offset;
4809

4810 4811
					offset = prebuilt->autoinc_offset;
					need = prebuilt->autoinc_increment;
4812

4813 4814 4815
					auto_inc = innobase_next_autoinc(
						auto_inc,
						need, offset, col_max_value);
4816

4817 4818
					err = innobase_set_max_autoinc(
						auto_inc);
4819

4820 4821 4822
					if (err != DB_SUCCESS) {
						error = err;
					}
4823
				}
4824 4825
			}
			break;
4826 4827
		}
	}
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4828 4829 4830

	innodb_srv_conc_exit_innodb(prebuilt->trx);

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4831
report_error:
4832 4833 4834
	error_result = convert_error_code_to_mysql((int) error,
						   prebuilt->table->flags,
						   user_thd);
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osku committed
4835 4836 4837 4838

func_exit:
	innobase_active_small();

4839
	DBUG_RETURN(error_result);
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4840 4841
}

4842
/**********************************************************************//**
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4843
Checks which fields have changed in a row and stores information
4844 4845
of them to an update vector.
@return	error number or 0 */
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4846 4847 4848 4849
static
int
calc_row_difference(
/*================*/
4850 4851 4852 4853
	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 */
	struct st_table* table,		/*!< in: table in MySQL data
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					dictionary */
4855 4856 4857 4858
	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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{
4860
	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;
4867 4868 4869
	const byte*	new_mysql_row_col;
	const byte*	o_ptr;
	const byte*	n_ptr;
4870
	byte*		buf;
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	upd_field_t*	ufield;
	ulint		col_type;
	ulint		n_changed = 0;
	dfield_t	dfield;
4875
	dict_index_t*	clust_index;
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	uint		i;

	n_fields = table->s->fields;
4879
	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];

4887 4888
		o_ptr = (const byte*) old_row + get_field_offset(table, field);
		n_ptr = (const byte*) new_row + get_field_offset(table, field);
4889

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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
4899
		comparison. */
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4900 4901

		field_mysql_type = field->type();
4902

4903
		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 */
4920

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4921
				o_ptr = row_mysql_read_true_varchar(
4922 4923 4924 4925
					&o_len, o_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));

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				n_ptr = row_mysql_read_true_varchar(
4927 4928 4929
					&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;
4954

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

4958
			dict_col_copy_type(prebuilt->table->cols + i,
4959
					   dfield_get_type(&dfield));
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			if (n_len != UNIV_SQL_NULL) {
				buf = row_mysql_store_col_in_innobase_format(
4963 4964 4965 4966 4967
					&dfield,
					(byte*)buf,
					TRUE,
					new_mysql_row_col,
					col_pack_len,
4968
					dict_table_is_comp(prebuilt->table));
4969
				dfield_copy_data(&ufield->new_val, &dfield);
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			} else {
4971
				dfield_set_null(&ufield->new_val);
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			}

			ufield->exp = NULL;
4975
			ufield->orig_len = 0;
4976
			ufield->field_no = dict_col_get_clust_pos(
4977
				&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);
}

4990
/**********************************************************************//**
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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
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if its index columns are updated!
@return	error number or 0 */
4998
UNIV_INTERN
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int
ha_innobase::update_row(
/*====================*/
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	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;
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	trx_t*		trx = thd_to_trx(user_thd);
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	DBUG_ENTER("ha_innobase::update_row");

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	ut_a(prebuilt->trx == trx);
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	ha_statistic_increment(&SSV::ha_update_count);

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	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) */

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	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;

5034
	ut_a(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);
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	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)  {

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		ulonglong	auto_inc;
		ulonglong	col_max_value;
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		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);

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		if (auto_inc <= col_max_value && auto_inc != 0) {
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			ulonglong	need;
			ulonglong	offset;

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

			auto_inc = innobase_next_autoinc(
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				auto_inc, need, offset, col_max_value);
5075

5076
			error = innobase_set_max_autoinc(auto_inc);
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		}
	}

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	innodb_srv_conc_exit_innodb(trx);
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	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);
}

5103
/**********************************************************************//**
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Deletes a row given as the parameter.
@return	error number or 0 */
5106
UNIV_INTERN
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int
ha_innobase::delete_row(
/*====================*/
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	const uchar*	record)	/*!< in: a row in MySQL format */
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{
	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");

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

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

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	innodb_srv_conc_exit_innodb(trx);
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	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);
}

5146
/**********************************************************************//**
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Removes a new lock set on a row, if it was not read optimistically. This can
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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. */
5150
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:
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		if (!srv_locks_unsafe_for_binlog
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		    && 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. */
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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. */
5193
UNIV_INTERN
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void
ha_innobase::try_semi_consistent_read(bool yes)
/*===========================================*/
{
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	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
5199

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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. */

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	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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	}
}

5214
/******************************************************************//**
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Initializes a handle to use an index.
@return	0 or error number */
5217
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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{
5224
	DBUG_ENTER("index_init");
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5226
	DBUG_RETURN(change_active_index(keynr));
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}

5229
/******************************************************************//**
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Currently does nothing.
@return	0 */
5232
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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}

5243
/*********************************************************************//**
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Converts a search mode flag understood by MySQL to a flag understood
by InnoDB. */
5246
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. */


5348
/**********************************************************************//**
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5349
Positions an index cursor to the index specified in the handle. Fetches the
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row if any.
@return	0, HA_ERR_KEY_NOT_FOUND, or error number */
5352
UNIV_INTERN
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int
ha_innobase::index_read(
/*====================*/
5356
	uchar*		buf,		/*!< in/out: buffer for the returned
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5357
					row */
5358
	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 */
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	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;
5372 5373
	ulint		match_mode	= 0;
	int		error;
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	ulint		ret;

5376
	DBUG_ENTER("index_read");
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5377

5378
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
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5379

5380
	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);
	}
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	if (UNIV_UNLIKELY(!prebuilt->index_usable)) {
		DBUG_RETURN(HA_ERR_TABLE_DEF_CHANGED);
	}
5391

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5392
	/* Note that if the index for which the search template is built is not
5393
	necessarily prebuilt->index, but can also be the clustered index */
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	if (prebuilt->sql_stat_start) {
5396
		build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS);
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	}

	if (key_ptr) {
5400
		/* 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 */

5415
		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) {
5423

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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;

5434
	if (mode != PAGE_CUR_UNSUPP) {
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5435

5436
		innodb_srv_conc_enter_innodb(prebuilt->trx);
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5437

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		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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5446

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	switch (ret) {
	case DB_SUCCESS:
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		error = 0;
		table->status = 0;
5451 5452
		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;
5465
		break;
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	}

	DBUG_RETURN(error);
}

5471
/*******************************************************************//**
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5472
The following functions works like index_read, but it find the last
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row with the current key value or prefix.
@return	0, HA_ERR_KEY_NOT_FOUND, or an error code */
5475
UNIV_INTERN
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int
ha_innobase::index_read_last(
/*=========================*/
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	uchar*		buf,	/*!< out: fetched row */
	const uchar*	key_ptr,/*!< in: key value, or a prefix of a full
5481
				key value */
5482
	uint		key_len)/*!< in: length of the key val or prefix
5483
				in bytes */
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{
5485
	return(index_read(buf, key_ptr, key_len, HA_READ_PREFIX_LAST));
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}

5488
/********************************************************************//**
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Get the index for a handle. Does not change active index.
@return	NULL or index instance. */
5491
UNIV_INTERN
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dict_index_t*
ha_innobase::innobase_get_index(
/*============================*/
5495
	uint		keynr)	/*!< in: use this index; MAX_KEY means always
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				clustered index, even if it was internally
				generated by InnoDB */
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{
5499
	KEY*		key = 0;
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	dict_index_t*	index = 0;

	DBUG_ENTER("innobase_get_index");
5503
	ha_statistic_increment(&SSV::ha_read_key_count);
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	if (keynr != MAX_KEY && table->s->keys > 0) {
5506
		key = table->key_info + keynr;
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		index = innobase_index_lookup(share, keynr);

		if (index) {
			ut_a(ut_strcmp(index->name, key->name) == 0);
		} else {
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			/* 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);
			}
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			index = dict_table_get_index_on_name(prebuilt->table,
							     key->name);
		}
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	} else {
5530
		index = dict_table_get_first_index(prebuilt->table);
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	}

5533
	if (!index) {
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		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);
5539 5540 5541 5542 5543
	}

	DBUG_RETURN(index);
}

5544
/********************************************************************//**
5545 5546
Changes the active index of a handle.
@return	0 or error code */
5547
UNIV_INTERN
5548 5549 5550
int
ha_innobase::change_active_index(
/*=============================*/
5551
	uint	keynr)	/*!< in: use this index; MAX_KEY means always clustered
5552 5553 5554 5555
			index, even if it was internally generated by
			InnoDB */
{
	DBUG_ENTER("change_active_index");
5556

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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);

5564 5565 5566
	if (UNIV_UNLIKELY(!prebuilt->index)) {
		sql_print_warning("InnoDB: change_active_index(%u) failed",
				  keynr);
5567
		prebuilt->index_usable = FALSE;
5568
		DBUG_RETURN(1);
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5569 5570
	}

5571 5572 5573 5574
	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);
	}

5584
	ut_a(prebuilt->search_tuple != 0);
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5585 5586 5587 5588

	dtuple_set_n_fields(prebuilt->search_tuple, prebuilt->index->n_fields);

	dict_index_copy_types(prebuilt->search_tuple, prebuilt->index,
5589
			      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);
}

5602
/**********************************************************************//**
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5603
Positions an index cursor to the index specified in keynr. Fetches the
5604
row if any.
5605 5606
??? This is only used to read whole keys ???
@return	error number or 0 */
5607
UNIV_INTERN
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5608 5609 5610
int
ha_innobase::index_read_idx(
/*========================*/
5611
	uchar*		buf,		/*!< in/out: buffer for the returned
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5612
					row */
5613 5614
	uint		keynr,		/*!< in: use this index */
	const uchar*	key,		/*!< in: key value; if this is NULL
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5615 5616
					we position the cursor at the
					start or end of index */
5617 5618
	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));
}

5628
/***********************************************************************//**
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5629
Reads the next or previous row from a cursor, which must have previously been
5630 5631
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5632
UNIV_INTERN
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5633 5634 5635
int
ha_innobase::general_fetch(
/*=======================*/
5636
	uchar*	buf,		/*!< in/out: buffer for next row in MySQL
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5637
				format */
5638 5639
	uint	direction,	/*!< in: ROW_SEL_NEXT or ROW_SEL_PREV */
	uint	match_mode)	/*!< in: 0, ROW_SEL_EXACT, or
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5640 5641 5642 5643 5644 5645 5646
				ROW_SEL_EXACT_PREFIX */
{
	ulint		ret;
	int		error	= 0;

	DBUG_ENTER("general_fetch");

5647
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
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5648 5649 5650

	innodb_srv_conc_enter_innodb(prebuilt->trx);

5651 5652 5653
	ret = row_search_for_mysql(
		(byte*)buf, 0, prebuilt, match_mode, direction);

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	innodb_srv_conc_exit_innodb(prebuilt->trx);

5656 5657
	switch (ret) {
	case DB_SUCCESS:
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5658 5659
		error = 0;
		table->status = 0;
5660 5661
		break;
	case DB_RECORD_NOT_FOUND:
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5662 5663
		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;
5664 5665
		break;
	case DB_END_OF_INDEX:
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5666 5667
		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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5672
		table->status = STATUS_NOT_FOUND;
5673
		break;
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5674 5675 5676 5677 5678
	}

	DBUG_RETURN(error);
}

5679
/***********************************************************************//**
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5680
Reads the next row from a cursor, which must have previously been
5681 5682
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5683
UNIV_INTERN
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5684 5685 5686
int
ha_innobase::index_next(
/*====================*/
5687
	uchar*		buf)	/*!< in/out: buffer for next row in MySQL
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5688 5689
				format */
{
5690
	ha_statistic_increment(&SSV::ha_read_next_count);
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5691 5692 5693 5694

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

5695
/*******************************************************************//**
5696 5697
Reads the next row matching to the key value given as the parameter.
@return	0, HA_ERR_END_OF_FILE, or error number */
5698
UNIV_INTERN
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5699 5700 5701
int
ha_innobase::index_next_same(
/*=========================*/
5702 5703 5704
	uchar*		buf,	/*!< in/out: buffer for the row */
	const uchar*	key,	/*!< in: key value */
	uint		keylen)	/*!< in: key value length */
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5705
{
5706
	ha_statistic_increment(&SSV::ha_read_next_count);
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5707 5708 5709 5710

	return(general_fetch(buf, ROW_SEL_NEXT, last_match_mode));
}

5711
/***********************************************************************//**
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5712
Reads the previous row from a cursor, which must have previously been
5713 5714
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5715
UNIV_INTERN
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5716 5717 5718
int
ha_innobase::index_prev(
/*====================*/
5719
	uchar*	buf)	/*!< in/out: buffer for previous row in MySQL format */
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5720
{
5721
	ha_statistic_increment(&SSV::ha_read_prev_count);
5722

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5723 5724 5725
	return(general_fetch(buf, ROW_SEL_PREV, 0));
}

5726
/********************************************************************//**
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5727
Positions a cursor on the first record in an index and reads the
5728 5729
corresponding row to buf.
@return	0, HA_ERR_END_OF_FILE, or error code */
5730
UNIV_INTERN
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5731 5732 5733
int
ha_innobase::index_first(
/*=====================*/
5734
	uchar*	buf)	/*!< in/out: buffer for the row */
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5735 5736 5737
{
	int	error;

5738
	DBUG_ENTER("index_first");
5739
	ha_statistic_increment(&SSV::ha_read_first_count);
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5740

5741
	error = index_read(buf, NULL, 0, HA_READ_AFTER_KEY);
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5742

5743
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
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5744

5745 5746 5747
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
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5748

5749
	DBUG_RETURN(error);
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5750 5751
}

5752
/********************************************************************//**
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osku committed
5753
Positions a cursor on the last record in an index and reads the
5754 5755
corresponding row to buf.
@return	0, HA_ERR_END_OF_FILE, or error code */
5756
UNIV_INTERN
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5757 5758 5759
int
ha_innobase::index_last(
/*====================*/
5760
	uchar*	buf)	/*!< in/out: buffer for the row */
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5761 5762 5763
{
	int	error;

5764
	DBUG_ENTER("index_last");
5765
	ha_statistic_increment(&SSV::ha_read_last_count);
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5766

5767
	error = index_read(buf, NULL, 0, HA_READ_BEFORE_KEY);
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5768

5769
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
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5770

5771 5772 5773
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
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5774

5775
	DBUG_RETURN(error);
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5776 5777
}

5778
/****************************************************************//**
5779 5780
Initialize a table scan.
@return	0 or error number */
5781
UNIV_INTERN
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5782 5783 5784
int
ha_innobase::rnd_init(
/*==================*/
5785
	bool	scan)	/*!< in: TRUE if table/index scan FALSE otherwise */
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5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797
{
	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);
	}

5805
	start_of_scan = 1;
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5806

5807
	return(err);
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5808 5809
}

5810
/*****************************************************************//**
5811 5812
Ends a table scan.
@return	0 or error number */
5813
UNIV_INTERN
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int
ha_innobase::rnd_end(void)
/*======================*/
{
	return(index_end());
}

5821
/*****************************************************************//**
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5822
Reads the next row in a table scan (also used to read the FIRST row
5823 5824
in a table scan).
@return	0, HA_ERR_END_OF_FILE, or error number */
5825
UNIV_INTERN
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5826 5827 5828
int
ha_innobase::rnd_next(
/*==================*/
5829
	uchar*	buf)	/*!< in/out: returns the row in this buffer,
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osku committed
5830 5831 5832 5833
			in MySQL format */
{
	int	error;

5834
	DBUG_ENTER("rnd_next");
5835
	ha_statistic_increment(&SSV::ha_read_rnd_next_count);
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5836

5837
	if (start_of_scan) {
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5838
		error = index_first(buf);
5839

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5840 5841 5842
		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
5843

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5844 5845 5846 5847 5848
		start_of_scan = 0;
	} else {
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
	}

5849
	DBUG_RETURN(error);
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5850 5851
}

5852
/**********************************************************************//**
5853 5854
Fetches a row from the table based on a row reference.
@return	0, HA_ERR_KEY_NOT_FOUND, or error code */
5855
UNIV_INTERN
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5856 5857 5858
int
ha_innobase::rnd_pos(
/*=================*/
5859 5860
	uchar*	buf,	/*!< in/out: buffer for the row */
	uchar*	pos)	/*!< in: primary key value of the row in the
5861 5862 5863
			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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5864 5865 5866 5867
{
	int		error;
	uint		keynr	= active_index;
	DBUG_ENTER("rnd_pos");
5868
	DBUG_DUMP("key", pos, ref_length);
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5869

5870
	ha_statistic_increment(&SSV::ha_read_rnd_count);
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5871

5872
	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) {
5886
		DBUG_PRINT("error", ("Got error: %d", error));
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5887 5888 5889 5890
		DBUG_RETURN(error);
	}

	/* Note that we assume the length of the row reference is fixed
5891
	for the table, and it is == ref_length */
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5892 5893 5894 5895

	error = index_read(buf, pos, ref_length, HA_READ_KEY_EXACT);

	if (error) {
5896
		DBUG_PRINT("error", ("Got error: %d", error));
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5897 5898 5899 5900
	}

	change_active_index(keynr);

5901
	DBUG_RETURN(error);
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5902 5903
}

5904
/*********************************************************************//**
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5905 5906 5907 5908 5909 5910 5911
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. */
5912
UNIV_INTERN
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5913 5914 5915
void
ha_innobase::position(
/*==================*/
5916
	const uchar*	record)	/*!< in: row in MySQL format */
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5917 5918 5919
{
	uint		len;

5920
	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. */
5938

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5939 5940
	if (len != ref_length) {
	  sql_print_error("Stored ref len is %lu, but table ref len is %lu",
5941
			  (ulong) len, (ulong) ref_length);
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5942 5943 5944
	}
}

5945 5946 5947 5948 5949 5950
/* 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))

5951
/*****************************************************************//**
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5952 5953 5954 5955 5956
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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5959
					columns and indexes */
5960 5961
	const char*	table_name,	/*!< in: table name */
	const char*	path_of_temp_table,/*!< in: if this is a table explicitly
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5962 5963 5964 5965 5966 5967 5968
					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 */
5969
	ulint		flags)		/*!< in: table flags */
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5970 5971 5972 5973
{
	Field*		field;
	dict_table_t*	table;
	ulint		n_cols;
5974 5975
	int		error;
	ulint		col_type;
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5976
	ulint		col_len;
5977
	ulint		nulls_allowed;
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	ulint		unsigned_type;
	ulint		binary_type;
	ulint		long_true_varchar;
	ulint		charset_no;
5982
	ulint		i;
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5983

5984 5985
	DBUG_ENTER("create_table_def");
	DBUG_PRINT("enter", ("table_name: %s", table_name));
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5986

5987 5988 5989 5990 5991 5992
	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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5993 5994 5995 5996 5997
	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 */

5998
	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,
6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024
							     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;
		}

6037
		charset_no = 0;
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6038 6039 6040 6041 6042

		if (dtype_is_string_type(col_type)) {

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

6043 6044 6045 6046 6047
			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,
6048
					MYSQL_ERROR::WARN_LEVEL_WARN,
6049 6050 6051 6052 6053 6054 6055
					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. */
6066

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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;
			}
		}

6077 6078 6079
		/* First check whether the column to be added has a
		system reserved name. */
		if (dict_col_name_is_reserved(field->field_name)){
6080 6081
			my_error(ER_WRONG_COLUMN_NAME, MYF(0),
				 field->field_name);
6082
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),
6098
			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);
	}

6113
error_ret:
6114
	error = convert_error_code_to_mysql(error, flags, NULL);
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	DBUG_RETURN(error);
}

6119
/*****************************************************************//**
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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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					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;
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	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;
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	DBUG_ENTER("create_index");
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	key = form->key_info + key_num;

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	n_fields = key->key_parts;
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6151

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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);

6155
	ind_type = 0;
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6156

6157
	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));
6173

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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. */
6182

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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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6208

6209
			prefix_len = key_part->length;
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			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 {
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			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);

6240
	error = convert_error_code_to_mysql(error, flags, NULL);
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6241

6242
	my_free(field_lengths, MYF(0));
6243

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	DBUG_RETURN(error);
}

6247
/*****************************************************************//**
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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(
/*===================================*/
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	trx_t*		trx,		/*!< in: InnoDB transaction handle */
	ulint		flags,		/*!< in: InnoDB table flags */
	const char*	table_name)	/*!< in: table name */
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{
	dict_index_t*	index;
6259
	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 */
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	index = dict_mem_index_create(table_name,
				      innobase_index_reserve_name,
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				      0, DICT_CLUSTERED, 0);
6266

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	error = row_create_index_for_mysql(index, trx, NULL);

6269
	error = convert_error_code_to_mysql(error, flags, NULL);
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	return(error);
}

6274
/*****************************************************************//**
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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
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					columns and indexes */
6287
	HA_CREATE_INFO*	create_info)	/*!< in: create info. */
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{
	ibool 	kbs_specified	= FALSE;
	ibool	ret		= TRUE;


	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);

	/* First check if KEY_BLOCK_SIZE was specified. */
	if (create_info->key_block_size
	    || (create_info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE)) {

		kbs_specified = TRUE;
		switch (create_info->key_block_size) {
		case 1:
		case 2:
		case 4:
		case 8:
		case 16:
			/* Valid value. */
			break;
		default:
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			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
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					    ER_ILLEGAL_HA_CREATE_OPTION,
					    "InnoDB: invalid"
					    " KEY_BLOCK_SIZE = %lu."
					    " Valid values are"
					    " [1, 2, 4, 8, 16]",
					    create_info->key_block_size);
			ret = FALSE;
		}
	}
	
	/* If KEY_BLOCK_SIZE was specified, check for its
	dependencies. */
	if (kbs_specified && !srv_file_per_table) {
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		push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
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			     ER_ILLEGAL_HA_CREATE_OPTION,
			     "InnoDB: KEY_BLOCK_SIZE"
			     " requires innodb_file_per_table.");
		ret = FALSE;
	}

	if (kbs_specified && srv_file_format < DICT_TF_FORMAT_ZIP) {
6339
		push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
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			     ER_ILLEGAL_HA_CREATE_OPTION,
			     "InnoDB: KEY_BLOCK_SIZE"
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			     " requires innodb_file_format >"
			     " Antelope.");
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		ret = FALSE;
	}

	/* Now check for ROW_FORMAT specifier. */
	if (create_info->used_fields & HA_CREATE_USED_ROW_FORMAT) {
		switch (form->s->row_type) {
			const char* row_format_name;
		case ROW_TYPE_COMPRESSED:
		case ROW_TYPE_DYNAMIC:
			row_format_name
				= form->s->row_type == ROW_TYPE_COMPRESSED
				? "COMPRESSED"
				: "DYNAMIC";

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			/* These two ROW_FORMATs require srv_file_per_table
			and srv_file_format > Antelope */
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			if (!srv_file_per_table) {
				push_warning_printf(
					thd,
6363
					MYSQL_ERROR::WARN_LEVEL_WARN,
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					ER_ILLEGAL_HA_CREATE_OPTION,
					"InnoDB: ROW_FORMAT=%s"
					" requires innodb_file_per_table.",
					row_format_name);
					ret = FALSE;
			}

			if (srv_file_format < DICT_TF_FORMAT_ZIP) {
				push_warning_printf(
					thd,
6374
					MYSQL_ERROR::WARN_LEVEL_WARN,
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					ER_ILLEGAL_HA_CREATE_OPTION,
					"InnoDB: ROW_FORMAT=%s"
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					" requires innodb_file_format >"
					" Antelope.",
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					row_format_name);
					ret = FALSE;
			}

			/* Cannot specify KEY_BLOCK_SIZE with
			ROW_FORMAT = DYNAMIC.
			However, we do allow COMPRESSED to be
			specified with KEY_BLOCK_SIZE. */
			if (kbs_specified
			    && form->s->row_type == ROW_TYPE_DYNAMIC) {
				push_warning_printf(
					thd,
6391
					MYSQL_ERROR::WARN_LEVEL_WARN,
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					ER_ILLEGAL_HA_CREATE_OPTION,
					"InnoDB: cannot specify"
					" ROW_FORMAT = DYNAMIC with"
					" KEY_BLOCK_SIZE.");
					ret = FALSE;
			}

			break;

		case ROW_TYPE_REDUNDANT:
		case ROW_TYPE_COMPACT:
		case ROW_TYPE_DEFAULT:
			/* Default is COMPACT. */
			row_format_name
				= form->s->row_type == ROW_TYPE_REDUNDANT
				? "REDUNDANT"
				: "COMPACT";

			/* Cannot specify KEY_BLOCK_SIZE with these
			format specifiers. */
			if (kbs_specified) {
				push_warning_printf(
					thd,
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					MYSQL_ERROR::WARN_LEVEL_WARN,
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					ER_ILLEGAL_HA_CREATE_OPTION,
					"InnoDB: cannot specify"
					" ROW_FORMAT = %s with"
					" KEY_BLOCK_SIZE.",
					row_format_name);
					ret = FALSE;
			}

			break;

		default:
			push_warning(thd,
6428
				     MYSQL_ERROR::WARN_LEVEL_WARN,
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				     ER_ILLEGAL_HA_CREATE_OPTION,
				     "InnoDB: invalid ROW_FORMAT specifier.");
			ret = FALSE;

		}
	}

	return(ret);
}

6439
/*****************************************************************//**
6440
Update create_info.  Used in SHOW CREATE TABLE et al. */
6441
UNIV_INTERN
6442 6443 6444
void
ha_innobase::update_create_info(
/*============================*/
6445
	HA_CREATE_INFO* create_info)	/*!< in/out: create info */
6446 6447 6448 6449 6450 6451 6452
{
  if (!(create_info->used_fields & HA_CREATE_USED_AUTO)) {
    ha_innobase::info(HA_STATUS_AUTO);
    create_info->auto_increment_value = stats.auto_increment_value;
  }
}

6453
/*****************************************************************//**
6454 6455
Creates a new table to an InnoDB database.
@return	error number */
6456
UNIV_INTERN
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int
ha_innobase::create(
/*================*/
6460 6461
	const char*	name,		/*!< in: table name */
	TABLE*		form,		/*!< in: information on table
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6462
					columns and indexes */
6463
	HA_CREATE_INFO*	create_info)	/*!< in: more information of the
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					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];
6475
	THD*		thd = ha_thd();
6476
	ib_int64_t	auto_inc_value;
6477
	ulint		flags;
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	/* Cache the value of innodb_file_format, in case it is
	modified by another thread while the table is being created. */
6480
	const ulint	file_format = srv_file_format;
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	const char*	stmt;
	size_t		stmt_len;
6483
	enum row_type	row_type;
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6484

6485
	DBUG_ENTER("ha_innobase::create");
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6486 6487

	DBUG_ASSERT(thd != NULL);
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	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

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	When srv_file_per_table is on and mysqld_embedded is off,
	check for full path pattern, i.e.
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	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
6503
	    && !mysqld_embedded
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	    && (!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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	if (form->s->fields > 1000) {
		/* The limit probably should be REC_MAX_N_FIELDS - 3 = 1020,
		but we play safe here */

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		DBUG_RETURN(HA_ERR_TO_BIG_ROW);
	}
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	/* Get the transaction associated with the current thd, or create one
	if not yet created */
6523

6524
	parent_trx = check_trx_exists(thd);
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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(parent_trx);

6531
	trx = innobase_trx_allocate(thd);
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	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

6539
	strcpy(name2, name);
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	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 */

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	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;
	}

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	if (create_info->key_block_size
	    || (create_info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE)) {
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		/* 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;

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		/*  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;
			}
6578
		}
6579

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		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.");
			flags = 0;
		}
6587

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		if (file_format < DICT_TF_FORMAT_ZIP) {
			push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				     ER_ILLEGAL_HA_CREATE_OPTION,
				     "InnoDB: KEY_BLOCK_SIZE"
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				     " requires innodb_file_format >"
				     " Antelope.");
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			flags = 0;
		}
6596

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		if (!flags) {
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_ILLEGAL_HA_CREATE_OPTION,
					    "InnoDB: ignoring"
					    " KEY_BLOCK_SIZE=%lu.",
					    create_info->key_block_size);
		}
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	}

6606 6607 6608
	row_type = form->s->row_type;

	if (flags) {
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		/* if KEY_BLOCK_SIZE was specified on this statement and
		 ROW_FORMAT was not, automatically change ROW_FORMAT to COMPRESSED.*/
		if (   (create_info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE)
		    && !(create_info->used_fields & HA_CREATE_USED_ROW_FORMAT)) {
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			row_type = ROW_TYPE_COMPRESSED;
		} else if (row_type != ROW_TYPE_COMPRESSED) {
			/* 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(
				thd,
				MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_ILLEGAL_HA_CREATE_OPTION,
				"InnoDB: ignoring KEY_BLOCK_SIZE=%lu"
				" unless ROW_FORMAT=COMPRESSED.",
				create_info->key_block_size);
			flags = 0;
		}
	} else {
6631
		/* flags == 0 means no KEY_BLOCK_SIZE.*/
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		if (row_type == ROW_TYPE_COMPRESSED) {
			/* 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;
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#if DICT_TF_ZSSIZE_MAX < 1
# error "DICT_TF_ZSSIZE_MAX < 1"
#endif
6644
		}
6645
	}
6646

6647 6648 6649 6650 6651 6652 6653 6654 6655 6656
	switch (row_type) {
		const char* row_format_name;
	case ROW_TYPE_REDUNDANT:
		break;
	case ROW_TYPE_COMPRESSED:
	case ROW_TYPE_DYNAMIC:
		row_format_name
			= row_type == ROW_TYPE_COMPRESSED
			? "COMPRESSED"
			: "DYNAMIC";
6657

6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678
		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.",
				row_format_name);
		} else if (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.",
				row_format_name);
		} else {
			flags |= DICT_TF_COMPACT
				| (DICT_TF_FORMAT_ZIP
				   << DICT_TF_FORMAT_SHIFT);
6679 6680
			break;
		}
6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691

		/* fall through */
	case ROW_TYPE_NOT_USED:
	case ROW_TYPE_FIXED:
	default:
		push_warning(thd,
			     MYSQL_ERROR::WARN_LEVEL_WARN,
			     ER_ILLEGAL_HA_CREATE_OPTION,
			     "InnoDB: assuming ROW_FORMAT=COMPACT.");
	case ROW_TYPE_DEFAULT:
	case ROW_TYPE_COMPACT:
6692
		flags = DICT_TF_COMPACT;
6693
		break;
6694 6695
	}

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6696 6697
	/* Look for a primary key */

6698
	primary_key_no= (form->s->primary_key != MAX_KEY ?
6699
			 (int) form->s->primary_key :
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6700 6701
			 -1);

6702
	/* Our function innobase_get_mysql_key_number_for_index assumes
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6703 6704
	the primary key is always number 0, if it exists */

6705
	ut_a(primary_key_no == -1 || primary_key_no == 0);
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6706

6707 6708
	/* Check for name conflicts (with reserved name) for
	any user indices to be created. */
6709 6710
	if (innobase_index_name_is_reserved(trx, form->key_info,
					    form->s->keys)) {
6711 6712 6713 6714
		error = -1;
		goto cleanup;
	}

6715 6716 6717 6718
	if (create_info->options & HA_LEX_CREATE_TMP_TABLE) {
		flags |= DICT_TF2_TEMPORARY << DICT_TF2_SHIFT;
	}

6719 6720 6721 6722 6723 6724 6725 6726 6727
	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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6728 6729 6730 6731 6732 6733 6734
	/* 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 */

6735
		error = create_clustered_index_when_no_primary(
6736
			trx, flags, norm_name);
6737
		if (error) {
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6738
			goto cleanup;
6739
		}
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6740 6741 6742 6743 6744
	}

	if (primary_key_no != -1) {
		/* In InnoDB the clustered index must always be created
		first */
6745
		if ((error = create_index(trx, form, flags, norm_name,
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6746 6747
					  (uint) primary_key_no))) {
			goto cleanup;
6748 6749
		}
	}
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6750 6751 6752 6753 6754

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

		if (i != (uint) primary_key_no) {

6755 6756
			if ((error = create_index(trx, form, flags, norm_name,
						  i))) {
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6757
				goto cleanup;
6758 6759 6760
			}
		}
	}
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6761

6762 6763 6764 6765 6766
	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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6767 6768
			create_info->options & HA_LEX_CREATE_TMP_TABLE);

6769
		error = convert_error_code_to_mysql(error, flags, NULL);
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6770 6771 6772 6773 6774 6775

		if (error) {
			goto cleanup;
		}
	}

6776
	innobase_commit_low(trx);
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osku committed
6777 6778 6779 6780 6781 6782 6783 6784 6785

	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();

6786
	innobase_table = dict_table_get(norm_name, FALSE);
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6787 6788 6789

	DBUG_ASSERT(innobase_table != 0);

6790 6791 6792
	if (innobase_table) {
		/* We update the highest file format in the system table
		space, if this table has higher file format setting. */
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calvin committed
6793

6794 6795 6796 6797
		trx_sys_file_format_max_upgrade(
			(const char**) &innobase_file_format_check,
			dict_table_get_format(innobase_table));
	}
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calvin committed
6798

6799 6800 6801 6802
	/* 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
6803 6804
	this is an ALTER TABLE or CREATE INDEX because CREATE INDEX
	does a table copy too. */
6805 6806

	if (((create_info->used_fields & HA_CREATE_USED_AUTO)
6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818
	    || thd_sql_command(thd) == SQLCOM_ALTER_TABLE
	    || thd_sql_command(thd) == SQLCOM_CREATE_INDEX)
	    && create_info->auto_increment_value > 0) {

		/* Query was one of :
		CREATE TABLE ...AUTO_INCREMENT = x; or
		ALTER TABLE...AUTO_INCREMENT = x;   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. */
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6819 6820

		auto_inc_value = create_info->auto_increment_value;
6821 6822

		dict_table_autoinc_lock(innobase_table);
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6823
		dict_table_autoinc_initialize(innobase_table, auto_inc_value);
6824
		dict_table_autoinc_unlock(innobase_table);
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6825 6826 6827 6828 6829 6830 6831
	}

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

	srv_active_wake_master_thread();

6832
	trx_free_for_mysql(trx);
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6833 6834 6835 6836 6837

	DBUG_RETURN(0);

cleanup:
	innobase_commit_low(trx);
6838

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osku committed
6839
	row_mysql_unlock_data_dictionary(trx);
6840

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osku committed
6841 6842 6843 6844 6845
	trx_free_for_mysql(trx);

	DBUG_RETURN(error);
}

6846
/*****************************************************************//**
6847 6848
Discards or imports an InnoDB tablespace.
@return	0 == success, -1 == error */
6849
UNIV_INTERN
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6850 6851 6852
int
ha_innobase::discard_or_import_tablespace(
/*======================================*/
6853
	my_bool discard)	/*!< in: TRUE if discard, else import */
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6854 6855 6856 6857 6858
{
	dict_table_t*	dict_table;
	trx_t*		trx;
	int		err;

6859
	DBUG_ENTER("ha_innobase::discard_or_import_tablespace");
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osku committed
6860

6861 6862
	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
6863
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
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6864 6865 6866 6867 6868 6869 6870 6871 6872 6873

	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);
	}

6874
	err = convert_error_code_to_mysql(err, dict_table->flags, NULL);
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6875 6876 6877 6878

	DBUG_RETURN(err);
}

6879
/*****************************************************************//**
6880 6881
Deletes all rows of an InnoDB table.
@return	error number */
6882
UNIV_INTERN
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osku committed
6883 6884 6885 6886 6887 6888 6889 6890
int
ha_innobase::delete_all_rows(void)
/*==============================*/
{
	int		error;

	DBUG_ENTER("ha_innobase::delete_all_rows");

6891 6892 6893 6894 6895 6896
	/* Get the transaction associated with the current thd, or create one
	if not yet created, and update prebuilt->trx */

	update_thd(ha_thd());

	if (thd_sql_command(user_thd) != SQLCOM_TRUNCATE) {
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6897 6898
	fallback:
		/* We only handle TRUNCATE TABLE t as a special case.
6899 6900
		DELETE FROM t will have to use ha_innobase::delete_row(),
		because DELETE is transactional while TRUNCATE is not. */
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6901 6902 6903 6904 6905
		DBUG_RETURN(my_errno=HA_ERR_WRONG_COMMAND);
	}

	/* Truncate the table in InnoDB */

6906
	error = row_truncate_table_for_mysql(prebuilt->table, prebuilt->trx);
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6907 6908 6909 6910 6911
	if (error == DB_ERROR) {
		/* Cannot truncate; resort to ha_innobase::delete_row() */
		goto fallback;
	}

6912 6913
	error = convert_error_code_to_mysql(error, prebuilt->table->flags,
					    NULL);
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6914 6915 6916 6917

	DBUG_RETURN(error);
}

6918
/*****************************************************************//**
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6919 6920 6921 6922
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
6923 6924
inside InnoDB.
@return	error number */
6925
UNIV_INTERN
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6926 6927 6928
int
ha_innobase::delete_table(
/*======================*/
6929
	const char*	name)	/*!< in: table name */
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{
	ulint	name_len;
	int	error;
	trx_t*	parent_trx;
	trx_t*	trx;
6935
	THD	*thd = ha_thd();
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6936 6937
	char	norm_name[1000];

6938
	DBUG_ENTER("ha_innobase::delete_table");
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osku committed
6939

6940 6941 6942 6943 6944 6945 6946 6947
	/* 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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6948 6949
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
6950

6951
	parent_trx = check_trx_exists(thd);
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6952 6953 6954 6955

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

6956
	trx_search_latch_release_if_reserved(parent_trx);
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osku committed
6957

6958 6959
	trx = innobase_trx_allocate(thd);

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	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

	name_len = strlen(name);

6968
	ut_a(name_len < 1000);
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osku committed
6969

6970
	/* Drop the table in InnoDB */
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osku committed
6971 6972

	error = row_drop_table_for_mysql(norm_name, trx,
6973 6974
					 thd_sql_command(thd)
					 == SQLCOM_DROP_DB);
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6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986

	/* 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();

6987
	innobase_commit_low(trx);
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osku committed
6988

6989
	trx_free_for_mysql(trx);
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osku committed
6990

6991
	error = convert_error_code_to_mysql(error, 0, NULL);
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6992 6993 6994 6995

	DBUG_RETURN(error);
}

6996
/*****************************************************************//**
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osku committed
6997
Removes all tables in the named database inside InnoDB. */
6998
static
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6999
void
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7000 7001
innobase_drop_database(
/*===================*/
7002 7003
	handlerton *hton, /*!< in: handlerton of Innodb */
	char*	path)	/*!< in: database path; inside InnoDB the name
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7004 7005 7006 7007 7008 7009 7010 7011
			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;
7012
	THD*	thd		= current_thd;
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osku committed
7013 7014 7015

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7016

7017 7018
	DBUG_ASSERT(hton == innodb_hton_ptr);

7019 7020 7021
	/* In the Windows plugin, thd = current_thd is always NULL */
	if (thd) {
		trx_t*	parent_trx = check_trx_exists(thd);
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osku committed
7022

7023 7024 7025
		/* 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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osku committed
7026

7027 7028
		trx_search_latch_release_if_reserved(parent_trx);
	}
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7029 7030 7031 7032 7033 7034 7035 7036 7037

	ptr = strend(path) - 2;

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

	ptr++;
7038
	namebuf = (char*) my_malloc((uint) len + 2, MYF(0));
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7039 7040 7041 7042

	memcpy(namebuf, ptr, len);
	namebuf[len] = '/';
	namebuf[len + 1] = '\0';
7043
#ifdef	__WIN__
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osku committed
7044 7045
	innobase_casedn_str(namebuf);
#endif
7046 7047
#if defined __WIN__ && !defined MYSQL_SERVER
	/* In the Windows plugin, thd = current_thd is always NULL */
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osku committed
7048
	trx = trx_allocate_for_mysql();
7049 7050 7051 7052
	trx->mysql_thd = NULL;
#else
	trx = innobase_trx_allocate(thd);
#endif
7053
	row_drop_database_for_mysql(namebuf, trx);
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7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066
	my_free(namebuf, MYF(0));

	/* 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();

7067 7068
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
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osku committed
7069
}
7070
/*********************************************************************//**
7071 7072
Renames an InnoDB table.
@return	0 or error code */
7073 7074 7075 7076
static
int
innobase_rename_table(
/*==================*/
7077 7078 7079
	trx_t*		trx,	/*!< in: transaction */
	const char*	from,	/*!< in: old name of the table */
	const char*	to,	/*!< in: new name of the table */
7080
	ibool		lock_and_commit)
7081
				/*!< in: TRUE=lock data dictionary and commit */
7082 7083 7084 7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095 7096
{
	int	error;
	char*	norm_to;
	char*	norm_from;

	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

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

7097 7098
	normalize_table_name(norm_to, to);
	normalize_table_name(norm_from, from);
7099 7100 7101 7102

	/* Serialize data dictionary operations with dictionary mutex:
	no deadlocks can occur then in these operations */

7103 7104 7105
	if (lock_and_commit) {
		row_mysql_lock_data_dictionary(trx);
	}
7106 7107

	error = row_rename_table_for_mysql(
7108
		norm_from, norm_to, trx, lock_and_commit);
7109 7110 7111 7112

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

7113 7114
		fputs("InnoDB: Renaming table ", ef);
		ut_print_name(ef, trx, TRUE, norm_from);
7115
		fputs(" to ", ef);
7116
		ut_print_name(ef, trx, TRUE, norm_to);
7117 7118 7119
		fputs(" failed!\n", ef);
	}

7120 7121
	if (lock_and_commit) {
		row_mysql_unlock_data_dictionary(trx);
7122

7123 7124 7125
		/* 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 */
7126

7127 7128
		log_buffer_flush_to_disk();
	}
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7129

7130 7131 7132 7133 7134
	my_free(norm_to, MYF(0));
	my_free(norm_from, MYF(0));

	return error;
}
7135
/*********************************************************************//**
7136 7137
Renames an InnoDB table.
@return	0 or error code */
7138
UNIV_INTERN
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osku committed
7139 7140 7141
int
ha_innobase::rename_table(
/*======================*/
7142 7143
	const char*	from,	/*!< in: old name of the table */
	const char*	to)	/*!< in: new name of the table */
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7144
{
7145
	trx_t*	trx;
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7146 7147
	int	error;
	trx_t*	parent_trx;
7148
	THD*	thd		= ha_thd();
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7149

7150
	DBUG_ENTER("ha_innobase::rename_table");
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7151 7152 7153

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7154

7155
	parent_trx = check_trx_exists(thd);
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7156 7157 7158 7159

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

7160
	trx_search_latch_release_if_reserved(parent_trx);
osku's avatar
osku committed
7161

7162
	trx = innobase_trx_allocate(thd);
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7163

7164
	error = innobase_rename_table(trx, from, to, TRUE);
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7165 7166 7167 7168 7169 7170

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

	srv_active_wake_master_thread();

7171 7172
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
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osku committed
7173

7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191
	/* 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;
	}

7192
	error = convert_error_code_to_mysql(error, 0, NULL);
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7193 7194 7195 7196

	DBUG_RETURN(error);
}

7197
/*********************************************************************//**
7198 7199
Estimates the number of index records in a range.
@return	estimated number of rows */
7200
UNIV_INTERN
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osku committed
7201 7202 7203
ha_rows
ha_innobase::records_in_range(
/*==========================*/
7204 7205
	uint			keynr,		/*!< in: index number */
	key_range		*min_key,	/*!< in: start key value of the
7206
						   range, may also be 0 */
7207
	key_range		*max_key)	/*!< in: range end key val, may
7208
						   also be 0 */
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{
	KEY*		key;
	dict_index_t*	index;
7212
	uchar*		key_val_buff2	= (uchar*) my_malloc(
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						  table->s->reclength
7214
					+ table->s->max_key_length + 100,
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								MYF(MY_FAE));
	ulint		buff2_len = table->s->reclength
7217
					+ table->s->max_key_length + 100;
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	dtuple_t*	range_start;
	dtuple_t*	range_end;
7220
	ib_int64_t	n_rows;
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	ulint		mode1;
	ulint		mode2;
7223
	mem_heap_t*	heap;
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7224

7225
	DBUG_ENTER("records_in_range");
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7226

7227
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
7228

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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;

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	index = innobase_get_index(keynr);

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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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7253

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	heap = mem_heap_create(2 * (key->key_parts * sizeof(dfield_t)
				    + sizeof(dtuple_t)));

	range_start = dtuple_create(heap, key->key_parts);
7258
	dict_index_copy_types(range_start, index, key->key_parts);
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7259

7260
	range_end = dtuple_create(heap, key->key_parts);
7261
	dict_index_copy_types(range_end, index, key->key_parts);
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	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 :
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					 (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 :
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					 (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 :
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						HA_READ_KEY_EXACT);
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7282
	mode2 = convert_search_mode_to_innobase(max_key ? max_key->flag :
7283
						HA_READ_KEY_EXACT);
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7284

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	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 {

7292
		n_rows = HA_POS_ERROR;
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	}

7295
	mem_heap_free(heap);
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7296

7297
func_exit:
7298
	my_free(key_val_buff2, MYF(0));
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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) {
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		n_rows = 1;
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	}

	DBUG_RETURN((ha_rows) n_rows);
}

7315
/*********************************************************************//**
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7316
Gives an UPPER BOUND to the number of rows in a table. This is used in
7317 7318
filesort.cc.
@return	upper bound of rows */
7319
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;

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	DBUG_ENTER("estimate_rows_upper_bound");
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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. */

7334
	update_thd(ha_thd());
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7335 7336

	prebuilt->trx->op_info = (char*)
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				 "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);

7344
	index = dict_table_get_first_index(prebuilt->table);
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7345

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	ut_a(index->stat_n_leaf_pages > 0);

	local_data_file_length =
		((ulonglong) index->stat_n_leaf_pages) * UNIV_PAGE_SIZE;

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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);
}

7365
/*********************************************************************//**
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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
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decide if we should scan the table or use keys.
@return	estimated time measured in disk seeks */
7370
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. */
7379

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	return((double) (prebuilt->table->stat_clustered_index_size));
}

7383
/******************************************************************//**
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7384
Calculate the time it takes to read a set of ranges through an index
7385 7386
This enables us to optimise reads for clustered indexes.
@return	estimated time measured in disk seeks */
7387
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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{
	ha_rows total_rows;
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	double	time_for_scan;

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	if (index != table->s->primary_key) {
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		/* 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) {

7415
		return(time_for_scan);
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	}

	return(ranges + (double) rows / (double) total_rows * time_for_scan);
}

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/*********************************************************************//**
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_ad(index);
	ut_ad(ib_table);
	ut_ad(table);
	ut_ad(share);

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	/* If index does not belong to the table of share structure. Search
	index->table instead */
7452
	if (index->table != ib_table) {
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		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);
	}

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	/* 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 in the 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);
		}
        }

	sql_print_error("Cannot find matching index number for index %s "
			 "in InnoDB index list.", index->name);

        return(0);
}
7501
/*********************************************************************//**
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Returns statistics information of the table to the MySQL interpreter,
in various fields of the handle object. */
7504
UNIV_INTERN
7505
int
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ha_innobase::info(
/*==============*/
7508
	uint flag)	/*!< in: what information MySQL requests */
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{
	dict_table_t*	ib_table;
	dict_index_t*	index;
	ha_rows		rec_per_key;
7513
	ib_int64_t	n_rows;
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	char		path[FN_REFLEN];
7515
	os_file_stat_t	stat_info;
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7516

7517
	DBUG_ENTER("info");
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7518

7519
	/* If we are forcing recovery at a high level, we will suppress
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	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. */

7527
	update_thd(ha_thd());
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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 */

	prebuilt->trx->op_info = (char*)"returning various info to MySQL";

	trx_search_latch_release_if_reserved(prebuilt->trx);

7536
	ib_table = prebuilt->table;
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7537

7538
	if (flag & HA_STATUS_TIME) {
7539
		if (innobase_stats_on_metadata) {
7540 7541
			/* In sql_show we call with this flag: update
			then statistics so that they are up-to-date */
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7542

7543
			prebuilt->trx->op_info = "updating table statistics";
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7544

7545
			dict_update_statistics(ib_table);
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7546

7547
			prebuilt->trx->op_info = "returning various info to MySQL";
7548
		}
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7549

7550
		my_snprintf(path, sizeof(path), "%s/%s%s",
7551 7552
				mysql_data_home, ib_table->name, reg_ext);

7553
		unpack_filename(path,path);
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7555
		/* Note that we do not know the access time of the table,
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		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */

		if (os_file_get_status(path,&stat_info)) {
7559
			stats.create_time = (ulong) stat_info.ctime;
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7560
		}
7561
	}
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	if (flag & HA_STATUS_VARIABLE) {
		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++;
		}

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		/* 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. */
7591 7592
		if (thd_sql_command(user_thd) == SQLCOM_TRUNCATE) {

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			n_rows = 1;
7594 7595 7596 7597 7598 7599 7600

			/* 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. */

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			prebuilt->autoinc_last_value = 0;
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		}

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		stats.records = (ha_rows)n_rows;
		stats.deleted = 0;
		stats.data_file_length = ((ulonglong)
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7607
				ib_table->stat_clustered_index_size)
7608
					* UNIV_PAGE_SIZE;
7609
		stats.index_file_length = ((ulonglong)
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				ib_table->stat_sum_of_other_index_sizes)
7611
					* UNIV_PAGE_SIZE;
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		/* 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.
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		See Bug#38185. */
		if (flag & HA_STATUS_NO_LOCK) {
			/* We do not update delete_length if no
			locking is requested so the "old" value can
			remain. delete_length is initialized to 0 in
			the ha_statistics' constructor. */
		} 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 {
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			/* lock the data dictionary to avoid races with
			ibd_file_missing and tablespace_discarded */
			row_mysql_lock_data_dictionary(prebuilt->trx);

			/* ib_table->space must be an existent tablespace */
			if (!ib_table->ibd_file_missing
			    && !ib_table->tablespace_discarded) {

				stats.delete_length =
					fsp_get_available_space_in_free_extents(
						ib_table->space) * 1024;
			} else {

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				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);

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				stats.delete_length = 0;
			}

			row_mysql_unlock_data_dictionary(prebuilt->trx);
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		}

7663
		stats.check_time = 0;
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		if (stats.records == 0) {
			stats.mean_rec_length = 0;
7667
		} else {
7668
			stats.mean_rec_length = (ulong) (stats.data_file_length / stats.records);
7669 7670
		}
	}
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	if (flag & HA_STATUS_CONST) {
7673
		ulong	i;
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		/* 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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		}

		for (i = 0; i < table->s->keys; i++) {
7690
			ulong	j;
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			/* 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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			if (index == NULL) {
7699
				sql_print_error("Table %s contains fewer "
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						"indexes inside InnoDB than "
						"are defined in the MySQL "
						".frm file. Have you mixed up "
						".frm files from different "
7704
						"installations? See "
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						REFMAN
						"innodb-troubleshooting.html\n",
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						ib_table->name);
				break;
			}

			for (j = 0; j < table->key_info[i].key_parts; j++) {

				if (j + 1 > index->n_uniq) {
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					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? "
7718
"See " REFMAN "innodb-troubleshooting.html\n",
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							index->name,
							ib_table->name,
							(unsigned long)
							index->n_uniq, j + 1);
7723
					break;
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				}

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				dict_index_stat_mutex_enter(index);

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				if (index->stat_n_diff_key_vals[j + 1] == 0) {

7730
					rec_per_key = stats.records;
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				} else {
7732
					rec_per_key = (ha_rows)(stats.records /
7733
					 index->stat_n_diff_key_vals[j + 1]);
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				}

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				dict_index_stat_mutex_exit(index);

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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;
				}

7749
				table->key_info[i].rec_per_key[j]=
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				  rec_per_key >= ~(ulong) 0 ? ~(ulong) 0 :
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				  (ulong) rec_per_key;
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			}
		}
	}

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	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {

		goto func_exit;
	}

7761
	if (flag & HA_STATUS_ERRKEY) {
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7762
		const dict_index_t*	err_index;
7763

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		ut_a(prebuilt->trx);
		ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
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7766

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7767
		err_index = trx_get_error_info(prebuilt->trx);
7768 7769

		if (err_index) {
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			errkey = innobase_get_mysql_key_number_for_index(
					share, table, ib_table, err_index);
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		} else {
			errkey = (unsigned int) prebuilt->trx->error_key_num;
		}
7775
	}
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7776

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	if ((flag & HA_STATUS_AUTO) && table->found_next_number_field) {
		stats.auto_increment_value = innobase_peek_autoinc();
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	}

7781
func_exit:
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	prebuilt->trx->op_info = (char*)"";

7784
	DBUG_RETURN(0);
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}

7787
/**********************************************************************//**
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7788
Updates index cardinalities of the table, based on 8 random dives into
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each index tree. This does NOT calculate exact statistics on the table.
@return	returns always 0 (success) */
7791
UNIV_INTERN
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int
ha_innobase::analyze(
7794
/*=================*/
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	THD*		thd,		/*!< in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: currently ignored */
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{
	/* Simply call ::info() with all the flags */
	info(HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE);

	return(0);
}

7804
/**********************************************************************//**
7805
This is mapped to "ALTER TABLE tablename ENGINE=InnoDB", which rebuilds
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7806
the table in MySQL. */
7807
UNIV_INTERN
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int
ha_innobase::optimize(
/*==================*/
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	THD*		thd,		/*!< in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: currently ignored */
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7813
{
7814
	return(HA_ADMIN_TRY_ALTER);
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}

7817
/*******************************************************************//**
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Tries to check that an InnoDB table is not corrupted. If corruption is
noticed, prints to stderr information about it. In case of corruption
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may also assert a failure and crash the server.
@return	HA_ADMIN_CORRUPT or HA_ADMIN_OK */
7822
UNIV_INTERN
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int
ha_innobase::check(
/*===============*/
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	THD*		thd,		/*!< in: user thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: check options, currently
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					ignored */
{
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	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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7835

7836
	DBUG_ENTER("ha_innobase::check");
7837
	DBUG_ASSERT(thd == ha_thd());
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	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
7840
	ut_a(prebuilt->trx == thd_to_trx(thd));
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	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);
	}

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	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);
	}
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7864

7865 7866 7867 7868 7869 7870 7871 7872 7873 7874 7875 7876 7877 7878 7879 7880 7881 7882 7883 7884 7885 7886 7887 7888 7889 7890 7891 7892 7893 7894 7895 7896 7897 7898 7899 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 7921 7922 7923 7924 7925 7926 7927 7928 7929 7930 7931 7932 7933 7934 7935 7936 7937 7938 7939 7940 7941 7942 7943 7944 7945 7946 7947 7948 7949 7950 7951 7952 7953 7954 7955 7956 7957 7958 7959 7960 7961 7962 7963 7964 7965 7966 7967 7968 7969 7970 7971 7972 7973 7974 7975 7976 7977 7978
	prebuilt->trx->op_info = "checking table";

	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)) {
7979
		my_error(ER_QUERY_INTERRUPTED, MYF(0));
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7980
	}
7981 7982

	DBUG_RETURN(is_ok ? HA_ADMIN_OK : HA_ADMIN_CORRUPT);
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7983 7984
}

7985
/*************************************************************//**
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7986 7987
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
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foreign keys.
@return	table comment + InnoDB free space + info on foreign keys */
7990
UNIV_INTERN
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char*
ha_innobase::update_table_comment(
/*==============================*/
7994
	const char*	comment)/*!< in: table comment defined by user */
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7995
{
7996 7997
	uint	length = (uint) strlen(comment);
	char*	str;
7998
	long	flen;
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7999 8000 8001 8002 8003 8004 8005 8006 8007

	/* 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 */
	}

8008
	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;

8018
	/* output the data to a temporary file */
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8019

8020
	mutex_enter(&srv_dict_tmpfile_mutex);
8021 8022
	rewind(srv_dict_tmpfile);

8023 8024 8025
	fprintf(srv_dict_tmpfile, "InnoDB free: %llu kB",
		fsp_get_available_space_in_free_extents(
			prebuilt->table->space));
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8026

8027
	dict_print_info_on_foreign_keys(FALSE, srv_dict_tmpfile,
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8028
				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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8035

8036 8037
	/* allocate buffer for the full string, and
	read the contents of the temporary file */
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8038

8039
	str = (char*) my_malloc(length + flen + 3, MYF(0));
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8040

8041 8042 8043 8044 8045 8046
	if (str) {
		char* pos	= str + length;
		if (length) {
			memcpy(str, comment, length);
			*pos++ = ';';
			*pos++ = ' ';
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8047
		}
8048 8049 8050
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(pos, 1, flen, srv_dict_tmpfile);
		pos[flen] = 0;
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8051 8052
	}

8053
	mutex_exit(&srv_dict_tmpfile_mutex);
8054

8055
	prebuilt->trx->op_info = (char*)"";
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8056

8057
	return(str ? str : (char*) comment);
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8058 8059
}

8060
/*******************************************************************//**
8061
Gets the foreign key create info for a table stored in InnoDB.
8062 8063 8064
@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 */
8065
UNIV_INTERN
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8066 8067 8068 8069 8070
char*
ha_innobase::get_foreign_key_create_info(void)
/*==========================================*/
{
	char*	str	= 0;
8071
	long	flen;
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8072 8073 8074 8075 8076 8077 8078

	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. */

8079
	update_thd(ha_thd());
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8080

8081
	prebuilt->trx->op_info = (char*)"getting info on foreign keys";
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8082

8083 8084 8085
	/* 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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8086

8087
	trx_search_latch_release_if_reserved(prebuilt->trx);
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8088

8089
	mutex_enter(&srv_dict_tmpfile_mutex);
8090
	rewind(srv_dict_tmpfile);
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8091

8092 8093
	/* output the data to a temporary file */
	dict_print_info_on_foreign_keys(TRUE, srv_dict_tmpfile,
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8094
				prebuilt->trx, prebuilt->table);
8095
	prebuilt->trx->op_info = (char*)"";
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8097 8098 8099 8100
	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	}
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8101

8102 8103
	/* allocate buffer for the string, and
	read the contents of the temporary file */
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8104

8105
	str = (char*) my_malloc(flen + 1, MYF(0));
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8106

8107 8108 8109 8110
	if (str) {
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(str, 1, flen, srv_dict_tmpfile);
		str[flen] = 0;
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	}

8113
	mutex_exit(&srv_dict_tmpfile_mutex);
8114

8115
	return(str);
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}


8119
UNIV_INTERN
8120
int
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ha_innobase::get_foreign_key_list(THD *thd, List<FOREIGN_KEY_INFO> *f_key_list)
{
  dict_foreign_t* foreign;

  DBUG_ENTER("get_foreign_key_list");
  ut_a(prebuilt != NULL);
8127
  update_thd(ha_thd());
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  prebuilt->trx->op_info = (char*)"getting list of foreign keys";
  trx_search_latch_release_if_reserved(prebuilt->trx);
8130
  mutex_enter(&(dict_sys->mutex));
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  foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list);

8133 8134 8135 8136
  while (foreign != NULL) {
	  uint i;
	  FOREIGN_KEY_INFO f_key_info;
	  LEX_STRING *name= 0;
8137
          uint ulen;
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          char uname[NAME_LEN+1];           /* Unencoded name */
          char db_name[NAME_LEN+1];
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	  const char *tmp_buff;

	  tmp_buff= foreign->id;
	  i= 0;
	  while (tmp_buff[i] != '/')
		  i++;
	  tmp_buff+= i + 1;
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	  f_key_info.forein_id = thd_make_lex_string(thd, 0,
		  tmp_buff, (uint) strlen(tmp_buff), 1);
8149
	  tmp_buff= foreign->referenced_table_name;
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          /* Database name */
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	  i= 0;
	  while (tmp_buff[i] != '/')
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          {
            db_name[i]= tmp_buff[i];
            i++;
          }
          db_name[i]= 0;
          ulen= filename_to_tablename(db_name, uname, sizeof(uname));
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	  f_key_info.referenced_db = thd_make_lex_string(thd, 0,
		  uname, ulen, 1);
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          /* Table name */
8164
	  tmp_buff+= i + 1;
8165
          ulen= filename_to_tablename(tmp_buff, uname, sizeof(uname));
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	  f_key_info.referenced_table = thd_make_lex_string(thd, 0,
		  uname, ulen, 1);
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	  for (i= 0;;) {
		  tmp_buff= foreign->foreign_col_names[i];
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		  name = thd_make_lex_string(thd, name,
			  tmp_buff, (uint) strlen(tmp_buff), 1);
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		  f_key_info.foreign_fields.push_back(name);
		  tmp_buff= foreign->referenced_col_names[i];
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		  name = thd_make_lex_string(thd, name,
			tmp_buff, (uint) strlen(tmp_buff), 1);
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		  f_key_info.referenced_fields.push_back(name);
		  if (++i >= foreign->n_fields)
			  break;
	  }

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          ulong length;
          if (foreign->type & DICT_FOREIGN_ON_DELETE_CASCADE)
          {
            length=7;
            tmp_buff= "CASCADE";
8187
          }
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          else if (foreign->type & DICT_FOREIGN_ON_DELETE_SET_NULL)
          {
            length=8;
            tmp_buff= "SET NULL";
          }
          else if (foreign->type & DICT_FOREIGN_ON_DELETE_NO_ACTION)
          {
            length=9;
            tmp_buff= "NO ACTION";
          }
          else
          {
            length=8;
            tmp_buff= "RESTRICT";
          }
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	  f_key_info.delete_method = thd_make_lex_string(
		  thd, f_key_info.delete_method, tmp_buff, length, 1);
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          if (foreign->type & DICT_FOREIGN_ON_UPDATE_CASCADE)
          {
            length=7;
            tmp_buff= "CASCADE";
          }
          else if (foreign->type & DICT_FOREIGN_ON_UPDATE_SET_NULL)
          {
            length=8;
            tmp_buff= "SET NULL";
          }
          else if (foreign->type & DICT_FOREIGN_ON_UPDATE_NO_ACTION)
          {
            length=9;
            tmp_buff= "NO ACTION";
          }
          else
          {
            length=8;
            tmp_buff= "RESTRICT";
          }
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	  f_key_info.update_method = thd_make_lex_string(
		  thd, f_key_info.update_method, tmp_buff, length, 1);
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          if (foreign->referenced_index &&
              foreign->referenced_index->name)
          {
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	    f_key_info.referenced_key_name = thd_make_lex_string(
		    thd, f_key_info.referenced_key_name,
		    foreign->referenced_index->name,
8235
		    (uint) strlen(foreign->referenced_index->name), 1);
8236
          }
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          else
            f_key_info.referenced_key_name= 0;
8239

8240
	  FOREIGN_KEY_INFO *pf_key_info = (FOREIGN_KEY_INFO *)
8241
		  thd_memdup(thd, &f_key_info, sizeof(FOREIGN_KEY_INFO));
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	  f_key_list->push_back(pf_key_info);
	  foreign = UT_LIST_GET_NEXT(foreign_list, foreign);
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  }
8245
  mutex_exit(&(dict_sys->mutex));
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8246
  prebuilt->trx->op_info = (char*)"";
8247

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  DBUG_RETURN(0);
}

8251
/*****************************************************************//**
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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 */
8256
UNIV_INTERN
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bool
ha_innobase::can_switch_engines(void)
/*=================================*/
{
	bool	can_switch;

8263
	DBUG_ENTER("ha_innobase::can_switch_engines");
8264

8265
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
8266

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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);
}

8280
/*******************************************************************//**
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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 */
8286
UNIV_INTERN
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uint
ha_innobase::referenced_by_foreign_key(void)
/*========================================*/
{
8291
	if (dict_table_is_referenced_by_foreign_key(prebuilt->table)) {
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		return(1);
	}

	return(0);
}

8299
/*******************************************************************//**
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Frees the foreign key create info for a table stored in InnoDB, if it is
non-NULL. */
8302
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) {
		my_free(str, MYF(0));
	}
}

8313
/*******************************************************************//**
8314 8315
Tells something additional to the handler about how to do things.
@return	0 or error number */
8316
UNIV_INTERN
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int
ha_innobase::extra(
/*===============*/
	enum ha_extra_function operation)
8321
			   /*!< 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:
8334
			reset_template(prebuilt);
8335
			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! */
8352
		case HA_EXTRA_IGNORE_DUP_KEY:
8353
			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_IGNORE;
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			break;
		case HA_EXTRA_WRITE_CAN_REPLACE:
8356
			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_REPLACE;
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			break;
		case HA_EXTRA_WRITE_CANNOT_REPLACE:
8359
			thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_REPLACE;
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			break;
		case HA_EXTRA_NO_IGNORE_DUP_KEY:
8362
			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()
8375
{
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	if (prebuilt->blob_heap) {
		row_mysql_prebuilt_free_blob_heap(prebuilt);
	}

	reset_template(prebuilt);
8381

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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. */
8386
	prebuilt->autoinc_last_value = 0;
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	return(0);
}
8390

8391
/******************************************************************//**
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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
8400
locks (thd_in_lock_tables(thd) holds in store_lock()) before executing the
8401 8402
procedure.
@return	0 or error code */
8403
UNIV_INTERN
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int
ha_innobase::start_stmt(
/*====================*/
8407
	THD*		thd,	/*!< in: handle to the user thread */
8408
	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;
8430
	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
8441
			&& thd_sql_command(thd) == SQLCOM_SELECT
8442 8443
			&& lock_type == TL_READ) {

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			/* For other than temporary tables, we obtain
			no lock for consistent read (plain SELECT). */

			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(),
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			2) ::external_lock(),
			3) ::init_table_handle_for_HANDLER(), and
8455
			4) ::transactional_table_lock(). */
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			prebuilt->select_lock_type =
				prebuilt->stored_select_lock_type;
		}
	}

	trx->detailed_error[0] = '\0';

	/* Set the MySQL flag to mark that there is an active transaction */
8465
	if (trx->active_trans == 0) {
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8467
		innobase_register_trx_and_stmt(ht, thd);
8468 8469
		trx->active_trans = 1;
	} else {
8470
		innobase_register_stmt(ht, thd);
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	}

	return(0);
}

8476
/******************************************************************//**
8477 8478
Maps a MySQL trx isolation level code to the InnoDB isolation level code
@return	InnoDB isolation level */
8479
static inline
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ulint
innobase_map_isolation_level(
/*=========================*/
8483
	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);
8491
	}
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8492
}
8493

8494
/******************************************************************//**
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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
8501 8502
the SQL statement in case of an error.
@return	0 */
8503
UNIV_INTERN
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int
ha_innobase::external_lock(
/*=======================*/
8507 8508
	THD*	thd,		/*!< in: handle to the user thread */
	int	lock_type)	/*!< in: lock type */
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{
	trx_t*		trx;

8512
	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
	informative error message and return with an error. */
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	if (lock_type == F_WRLCK)
8522 8523
	{
		ulong const binlog_format= thd_binlog_format(thd);
8524
		ulong const tx_isolation = thd_tx_isolation(ha_thd());
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		if (tx_isolation <= ISO_READ_COMMITTED
                   && binlog_format == BINLOG_FORMAT_STMT
8527 8528 8529 8530
#if MYSQL_VERSION_ID > 50140
                   && thd_binlog_filter_ok(thd)
#endif /* MYSQL_VERSION_ID > 50140 */
		   )
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		{
			char buf[256];
			my_snprintf(buf, sizeof(buf),
				    "Transaction level '%s' in"
				    " InnoDB is not safe for binlog mode '%s'",
				    tx_isolation_names[tx_isolation],
				    binlog_format_names[binlog_format]);
			my_error(ER_BINLOG_LOGGING_IMPOSSIBLE, MYF(0), buf);
			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;

8549
	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 */

		trx->detailed_error[0] = '\0';
8563

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		/* Set the MySQL flag to mark that there is an active
		transaction */
8566
		if (trx->active_trans == 0) {
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8568
			innobase_register_trx_and_stmt(ht, thd);
8569 8570
			trx->active_trans = 1;
		} else if (trx->n_mysql_tables_in_use == 0) {
8571
			innobase_register_stmt(ht, thd);
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		}

		if (trx->isolation_level == TRX_ISO_SERIALIZABLE
8575
			&& prebuilt->select_lock_type == LOCK_NONE
8576 8577
			&& 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
8595
		VERY easily deadlocks.
8596 8597

		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
8600
		procedure call (SQLCOM_CALL). */
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		if (prebuilt->select_lock_type != LOCK_NONE) {

8604 8605 8606
			if (thd_sql_command(thd) == SQLCOM_LOCK_TABLES
			    && THDVAR(thd, table_locks)
			    && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT)
8607
			    && thd_in_lock_tables(thd)) {
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8608

8609 8610
				ulint	error = row_lock_table_for_mysql(
					prebuilt, NULL, 0);
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				if (error != DB_SUCCESS) {
					error = convert_error_code_to_mysql(
8614
						(int) error, 0, thd);
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					DBUG_RETURN((int) error);
				}
			}

8619
			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) {

8644
		trx->mysql_n_tables_locked = 0;
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8645
		prebuilt->used_in_HANDLER = FALSE;
8646

8647
		if (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
8648
			if (trx->active_trans != 0) {
8649
				innobase_commit(ht, thd, TRUE);
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			}
		} else {
			if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
8653
						&& 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);
			}
		}
	}

	DBUG_RETURN(0);
}

8666
/******************************************************************//**
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8667
With this function MySQL request a transactional lock to a table when
8668 8669
user issued query LOCK TABLES..WHERE ENGINE = InnoDB.
@return	error code */
8670
UNIV_INTERN
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int
ha_innobase::transactional_table_lock(
/*==================================*/
8674 8675
	THD*	thd,		/*!< in: handle to the user thread */
	int	lock_type)	/*!< in: lock type */
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{
	trx_t*		trx;

8679
	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);

8688
	if (prebuilt->table->ibd_file_missing && !thd_tablespace_op(thd)) {
8689
		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?"
8697 8698
			"InnoDB: See " REFMAN
			"innodb-troubleshooting.html\n"
8699 8700
			"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;

8709
	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 {
8718 8719
		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 */

	/* Set the MySQL flag to mark that there is an active transaction */
8729
	if (trx->active_trans == 0) {
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8730

8731
		innobase_register_trx_and_stmt(ht, thd);
8732 8733
		trx->active_trans = 1;
	}
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8734

8735
	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) {
8741 8742
			error = convert_error_code_to_mysql(
				(int) error, prebuilt->table->flags, thd);
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			DBUG_RETURN((int) error);
		}

8746
		if (thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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8747

8748 8749
			/* 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);
}

8759
/************************************************************************//**
8760
Here we export InnoDB status variables to MySQL. */
8761
static
8762 8763 8764
void
innodb_export_status(void)
/*======================*/
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8765
{
8766 8767 8768
	if (innodb_inited) {
		srv_export_innodb_status();
	}
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}

8771
/************************************************************************//**
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Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
Monitor to the client. */
8774
static
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bool
innodb_show_status(
/*===============*/
8778 8779
	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)
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{
	trx_t*			trx;
	static const char	truncated_msg[] = "... truncated...\n";
	const long		MAX_STATUS_SIZE = 64000;
	ulint			trx_list_start = ULINT_UNDEFINED;
	ulint			trx_list_end = ULINT_UNDEFINED;

8788
	DBUG_ENTER("innodb_show_status");
8789
	DBUG_ASSERT(hton == innodb_hton_ptr);
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8790

8791
	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;

8801
	mutex_enter(&srv_monitor_file_mutex);
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8802
	rewind(srv_monitor_file);
8803 8804
	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;
	} else {
		usable_len = flen;
	}

	/* allocate buffer for the string, and
	read the contents of the temporary file */

8821
	if (!(str = (char*) my_malloc(usable_len + 1, MYF(0)))) {
8822
	  mutex_exit(&srv_monitor_file_mutex);
8823 8824
	  DBUG_RETURN(TRUE);
	}
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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);
	}

8847
	mutex_exit(&srv_monitor_file_mutex);
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8848

8849 8850
	stat_print(thd, innobase_hton_name, (uint) strlen(innobase_hton_name),
		   STRING_WITH_LEN(""), str, flen);
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8851

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8852
	my_free(str, MYF(0));
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8853

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8854
	DBUG_RETURN(FALSE);
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8855 8856
}

8857
/************************************************************************//**
8858 8859
Implements the SHOW MUTEX STATUS command.
@return TRUE on failure, FALSE on success. */
8860
static
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8861 8862
bool
innodb_mutex_show_status(
8863
/*=====================*/
8864
	handlerton*	hton,		/*!< in: the innodb handlerton */
8865
	THD*		thd,		/*!< in: the MySQL query thread of the
8866
					caller */
8867 8868
	stat_print_fn*	stat_print)	/*!< in: function for printing
					statistics */
8869 8870
{
	char buf1[IO_SIZE], buf2[IO_SIZE];
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8871 8872
	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;
8877
#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;
8884
#endif /* UNIV_DEBUG */
8885
	uint	  hton_name_len= (uint) strlen(innobase_hton_name), buf1len, buf2len;
8886
	DBUG_ENTER("innodb_mutex_show_status");
8887
	DBUG_ASSERT(hton == innodb_hton_ptr);
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8888

8889
	mutex_enter(&mutex_list_mutex);
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8890

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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;
		}
8896

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		if (buf_pool_is_block_mutex(mutex)) {
			block_mutex = mutex;
			block_mutex_oswait_count += mutex->count_os_wait;
			continue;
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8901
		}
8902
#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,
8918
					(ulong) (mutex->lspent_time/1000));
8919

8920
				if (stat_print(thd, innobase_hton_name,
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						hton_name_len, buf1, buf1len,
						buf2, buf2len)) {
8923
					mutex_exit(&mutex_list_mutex);
8924 8925 8926
					DBUG_RETURN(1);
				}
			}
8927
		} 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;
		}
8935
#else /* UNIV_DEBUG */
8936
		buf1len= (uint) my_snprintf(buf1, sizeof(buf1), "%s:%lu",
8937
				     mutex->cfile_name, (ulong) mutex->cline);
8938
		buf2len= (uint) my_snprintf(buf2, sizeof(buf2), "os_waits=%lu",
8939
				     (ulong) mutex->count_os_wait);
8940 8941 8942 8943

		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
8944
			mutex_exit(&mutex_list_mutex);
8945 8946 8947
			DBUG_RETURN(1);
		}
#endif /* UNIV_DEBUG */
8948
	}
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8949

8950 8951 8952 8953 8954 8955 8956 8957 8958 8959 8960 8961 8962 8963 8964
	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);

		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
			mutex_exit(&mutex_list_mutex);
			DBUG_RETURN(1);
		}
8965 8966
	}

8967
	mutex_exit(&mutex_list_mutex);
8968

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8969 8970
	mutex_enter(&rw_lock_list_mutex);

8971 8972
	for (lock = UT_LIST_GET_FIRST(rw_lock_list); lock != NULL;
	     lock = UT_LIST_GET_NEXT(list, lock)) {
8973
		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);
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		}
	}

	mutex_exit(&rw_lock_list_mutex);

9015
#ifdef UNIV_DEBUG
9016 9017 9018 9019 9020 9021 9022 9023 9024
	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));
9025

9026
	if (stat_print(thd, innobase_hton_name, hton_name_len,
9027 9028 9029
			STRING_WITH_LEN("rw_lock_mutexes"), buf2, buf2len)) {
		DBUG_RETURN(1);
	}
9030
#endif /* UNIV_DEBUG */
9031 9032

	DBUG_RETURN(FALSE);
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9033 9034
}

9035
static
9036 9037 9038
bool innobase_show_status(handlerton *hton, THD* thd, 
                          stat_print_fn* stat_print,
                          enum ha_stat_type stat_type)
9039
{
9040 9041
	DBUG_ASSERT(hton == innodb_hton_ptr);

9042 9043
	switch (stat_type) {
	case HA_ENGINE_STATUS:
9044
		return innodb_show_status(hton, thd, stat_print);
9045
	case HA_ENGINE_MUTEX:
9046
		return innodb_mutex_show_status(hton, thd, stat_print);
9047
	default:
9048
		return(FALSE);
9049
	}
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9050 9051
}

9052
/************************************************************************//**
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9053 9054 9055 9056
 Handling the shared INNOBASE_SHARE structure that is needed to provide table
 locking.
****************************************************************************/

9057
static INNOBASE_SHARE* get_share(const char* table_name)
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9058
{
9059 9060 9061
	INNOBASE_SHARE *share;
	pthread_mutex_lock(&innobase_share_mutex);

9062
	ulint	fold = ut_fold_string(table_name);
9063 9064 9065

	HASH_SEARCH(table_name_hash, innobase_open_tables, fold,
		    INNOBASE_SHARE*, share,
9066
		    ut_ad(share->use_count > 0),
9067
		    !strcmp(share->table_name, table_name));
9068 9069 9070

	if (!share) {

9071 9072
		uint length = (uint) strlen(table_name);

9073 9074
		/* TODO: invoke HASH_MIGRATE if innobase_open_tables
		grows too big */
9075 9076 9077 9078

		share = (INNOBASE_SHARE *) my_malloc(sizeof(*share)+length+1,
			MYF(MY_FAE | MY_ZEROFILL));

9079 9080
		share->table_name = (char*) memcpy(share + 1,
						   table_name, length + 1);
9081

9082 9083
		HASH_INSERT(INNOBASE_SHARE, table_name_hash,
			    innobase_open_tables, fold, share);
9084 9085

		thr_lock_init(&share->lock);
9086 9087 9088 9089 9090

		/* 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;
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	}

	share->use_count++;
	pthread_mutex_unlock(&innobase_share_mutex);

9096
	return(share);
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}

static void free_share(INNOBASE_SHARE* share)
{
	pthread_mutex_lock(&innobase_share_mutex);

9103 9104
#ifdef UNIV_DEBUG
	INNOBASE_SHARE* share2;
9105
	ulint	fold = ut_fold_string(share->table_name);
9106 9107 9108

	HASH_SEARCH(table_name_hash, innobase_open_tables, fold,
		    INNOBASE_SHARE*, share2,
9109
		    ut_ad(share->use_count > 0),
9110
		    !strcmp(share->table_name, share2->table_name));
9111 9112 9113 9114

	ut_a(share2 == share);
#endif /* UNIV_DEBUG */

9115
	if (!--share->use_count) {
9116
		ulint	fold = ut_fold_string(share->table_name);
9117 9118 9119

		HASH_DELETE(INNOBASE_SHARE, table_name_hash,
			    innobase_open_tables, fold, share);
9120
		thr_lock_delete(&share->lock);
9121 9122 9123 9124 9125

		/* Free any memory from index translation table */
		my_free(share->idx_trans_tbl.index_mapping,
			MYF(MY_ALLOW_ZERO_PTR));

9126
		my_free(share, MYF(0));
9127 9128 9129

		/* TODO: invoke HASH_MIGRATE if innobase_open_tables
		shrinks too much */
9130 9131 9132
	}

	pthread_mutex_unlock(&innobase_share_mutex);
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9133 9134
}

9135
/*****************************************************************//**
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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
9142 9143
end of an SQL statement.
@return	pointer to the next element in the 'to' array */
9144
UNIV_INTERN
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9145 9146 9147
THR_LOCK_DATA**
ha_innobase::store_lock(
/*====================*/
9148 9149
	THD*			thd,		/*!< in: user thread handle */
	THR_LOCK_DATA**		to,		/*!< in: pointer to an array
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9150 9151 9152 9153
						of pointers to lock structs;
						pointer to the 'lock' field
						of current handle is stored
						next to this array */
9154
	enum thr_lock_type	lock_type)	/*!< in: lock type to store in
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9155 9156 9157
						'lock'; this may also be
						TL_IGNORE */
{
9158 9159
	trx_t*		trx;

9160 9161 9162
	/* 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. */
9163

9164
	trx = check_trx_exists(thd);
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9165

9166
	/* NOTE: MySQL can call this function with lock 'type' TL_IGNORE!
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9167 9168 9169
	Be careful to ignore TL_IGNORE if we are going to do something with
	only 'real' locks! */

9170
	/* If no MySQL table is in use, we need to set the isolation level
9171 9172 9173
	of the transaction. */

	if (lock_type != TL_IGNORE
9174
	    && trx->n_mysql_tables_in_use == 0) {
9175
		trx->isolation_level = innobase_map_isolation_level(
9176
			(enum_tx_isolation) thd_tx_isolation(thd));
9177 9178 9179 9180 9181 9182 9183 9184 9185

		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);
		}
9186 9187
	}

9188
	DBUG_ASSERT(EQ_CURRENT_THD(thd));
9189
	const bool in_lock_tables = thd_in_lock_tables(thd);
9190
	const uint sql_command = thd_sql_command(thd);
9191

9192
	if (sql_command == SQLCOM_DROP_TABLE) {
9193 9194 9195 9196 9197

		/* 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. */ 

9198 9199 9200 9201 9202 9203
	} 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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		/* The OR cases above are in this order:
9206 9207
		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. */

9223
		ulint	isolation_level;
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9224

9225 9226 9227
		isolation_level = trx->isolation_level;

		if ((srv_locks_unsafe_for_binlog
9228
		     || isolation_level <= TRX_ISO_READ_COMMITTED)
9229 9230 9231
		    && isolation_level != TRX_ISO_SERIALIZABLE
		    && (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT)
		    && (sql_command == SQLCOM_INSERT_SELECT
9232
			|| sql_command == SQLCOM_REPLACE_SELECT
9233
			|| sql_command == SQLCOM_UPDATE
9234 9235
			|| sql_command == SQLCOM_CREATE_TABLE
			|| sql_command == SQLCOM_SET_OPTION)) {
9236 9237 9238 9239

			/* 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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9240
			is not set to serializable and MySQL is doing
9241 9242
			INSERT INTO...SELECT or REPLACE INTO...SELECT
			or UPDATE ... = (SELECT ...) or CREATE  ...
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			SELECT... or SET ... = (SELECT ...) without
			FOR UPDATE or IN SHARE MODE in select,
			then we use consistent read for select. */
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9246 9247 9248

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
9249
		} 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) {

9261
		/* We set possible LOCK_X value in external_lock, not yet
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9262 9263 9264 9265 9266 9267 9268 9269
		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) {

9270
		/* Starting from 5.0.7, we weaken also the table locks
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		set at the start of a MySQL stored procedure call, just like
		we weaken the locks set at the start of an SQL statement.
9273
		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). */

9278
		if (lock_type == TL_READ
9279
		    && 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;
		}

9294
		/* If we are not doing a LOCK TABLE, DISCARD/IMPORT
9295
		TABLESPACE or TRUNCATE TABLE then allow multiple
9296 9297
		writers. Note that ALTER TABLE uses a TL_WRITE_ALLOW_READ
		< TL_WRITE_CONCURRENT_INSERT.
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9298

9299
		We especially allow multiple writers if MySQL is at the
9300
		start of a stored procedure call (SQLCOM_CALL) or a
9301
		stored function call (MySQL does have in_lock_tables
9302
		TRUE there). */
9303

9304
		if ((lock_type >= TL_WRITE_CONCURRENT_INSERT
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		     && 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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9312

9313
			lock_type = TL_WRITE_ALLOW_WRITE;
9314
		}
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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
9320
		concurrent inserts to t2.
9321

9322 9323
		We especially allow concurrent inserts if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL)
9324
		(MySQL does have thd_in_lock_tables() TRUE there). */
9325

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9326
		if (lock_type == TL_READ_NO_INSERT
9327
		    && sql_command != SQLCOM_LOCK_TABLES) {
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			lock_type = TL_READ;
		}
9331

9332 9333
		lock.type = lock_type;
	}
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9334

9335
	*to++= &lock;
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	return(to);
}

9340
/*********************************************************************//**
9341 9342
Read the next autoinc value. Acquire the relevant locks before reading
the AUTOINC value. If SUCCESS then the table AUTOINC mutex will be locked
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on return and all relevant locks acquired.
@return	DB_SUCCESS or error code */
9345
UNIV_INTERN
9346
ulint
9347 9348
ha_innobase::innobase_get_autoinc(
/*==============================*/
9349
	ulonglong*	value)		/*!< out: autoinc value */
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{
9351 9352
 	*value = 0;
 
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9353
	prebuilt->autoinc_error = innobase_lock_autoinc();
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9354

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9355
	if (prebuilt->autoinc_error == DB_SUCCESS) {
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		/* Determine the first value of the interval */
		*value = dict_table_autoinc_read(prebuilt->table);

		/* It should have been initialized during open. */
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		if (*value == 0) {
			prebuilt->autoinc_error = DB_UNSUPPORTED;
			dict_table_autoinc_unlock(prebuilt->table);
		}
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9365
	}
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	return(prebuilt->autoinc_error);
9368
}
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9369

9370
/*******************************************************************//**
9371
This function reads the global auto-inc counter. It doesn't use the 
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AUTOINC lock even if the lock mode is set to TRADITIONAL.
@return	the autoinc value */
9374
UNIV_INTERN
9375 9376 9377
ulonglong
ha_innobase::innobase_peek_autoinc(void)
/*====================================*/
9378
{
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	ulonglong	auto_inc;
	dict_table_t*	innodb_table;
9381

9382 9383
	ut_a(prebuilt != NULL);
	ut_a(prebuilt->table != NULL);
9384

9385
	innodb_table = prebuilt->table;
9386

9387
	dict_table_autoinc_lock(innodb_table);
9388

9389
	auto_inc = dict_table_autoinc_read(innodb_table);
9390

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	if (auto_inc == 0) {
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB: AUTOINC next value generation "
			"is disabled for '%s'\n", innodb_table->name);
	}
9396

9397
	dict_table_autoinc_unlock(innodb_table);
9398

9399
	return(auto_inc);
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}
9401

9402
/*********************************************************************//**
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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
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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.
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*first_value is set to -1 if error (deadlock or lock wait timeout) */
UNIV_INTERN
9410 9411
void
ha_innobase::get_auto_increment(
9412
/*============================*/
9413
        ulonglong	offset,              /*!< in: table autoinc offset */
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        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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{
9419
	trx_t*		trx;
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	ulint		error;
	ulonglong	autoinc = 0;
9422

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	/* Prepare prebuilt->trx in the table handle */
9424
	update_thd(ha_thd());
9425

9426
	error = innobase_get_autoinc(&autoinc);
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	if (error != DB_SUCCESS) {
		*first_value = (~(ulonglong) 0);
9430
		return;
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	}

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	/* 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()).
9439
	*/
9440

9441
	trx = prebuilt->trx;
9442

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	/* 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. */
9447

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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. */
	ulonglong	col_max_value = innobase_get_int_col_max_value(
		table->next_number_field);

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	/* Called for the first time ? */
	if (trx->n_autoinc_rows == 0) {
9455

9456
		trx->n_autoinc_rows = (ulint) nb_desired_values;
9457

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		/* 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;
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		}

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		set_if_bigger(*first_value, autoinc);
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	/* Not in the middle of a mult-row INSERT. */
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	} else if (prebuilt->autoinc_last_value == 0) {
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		set_if_bigger(*first_value, autoinc);
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	/* 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;
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	}

9476
	*nb_reserved_values = trx->n_autoinc_rows;
9477

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	/* 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) {
9481
		ulonglong	need;
9482
		ulonglong	current;
9483
		ulonglong	next_value;
9484

9485
		current = *first_value > col_max_value ? autoinc : *first_value;
9486
		need = *nb_reserved_values * increment;
9487

9488
		/* Compute the last value in the interval */
9489
		next_value = innobase_next_autoinc(
9490
			current, need, offset, col_max_value);
9491 9492

		prebuilt->autoinc_last_value = next_value;
9493

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		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);
		}
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	} else {
		/* This will force write_row() into attempting an update
		of the table's AUTOINC counter. */
9504
		prebuilt->autoinc_last_value = 0;
9505
	}
9506 9507 9508

	/* The increment to be used to increase the AUTOINC value, we use
	this in write_row() and update_row() to increase the autoinc counter
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	for columns that are filled by the user. We need the offset and
	the increment. */
	prebuilt->autoinc_offset = offset;
	prebuilt->autoinc_increment = increment;
9513 9514

	dict_table_autoinc_unlock(prebuilt->table);
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}

9517
/*******************************************************************//**
9518 9519 9520
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
9521 9522
returned by storage engines that don't support this operation.
@return	0 or error code */
9523
UNIV_INTERN
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9524
int
9525 9526
ha_innobase::reset_auto_increment(
/*==============================*/
9527
	ulonglong	value)		/*!< in: new value for table autoinc */
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{
	DBUG_ENTER("ha_innobase::reset_auto_increment");

9531
	int	error;
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9532

9533
	update_thd(ha_thd());
9534

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	error = row_lock_table_autoinc_for_mysql(prebuilt);

	if (error != DB_SUCCESS) {
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		error = convert_error_code_to_mysql(error,
						    prebuilt->table->flags,
						    user_thd);
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		DBUG_RETURN(error);
9543
	}
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9544

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	/* The next value can never be 0. */
	if (value == 0) {
		value = 1;
	}

9550
	innobase_reset_autoinc(value);
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	DBUG_RETURN(0);
}

/* See comment in handler.cc */
9556
UNIV_INTERN
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bool
ha_innobase::get_error_message(int error, String *buf)
{
9560
	trx_t*	trx = check_trx_exists(ha_thd());
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9561

9562
	buf->copy(trx->detailed_error, (uint) strlen(trx->detailed_error),
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		system_charset_info);

9565
	return(FALSE);
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}

9568
/*******************************************************************//**
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9569 9570
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
9571 9572
InnoDB internally uses the row id as the primary key.
@return	< 0 if ref1 < ref2, 0 if equal, else > 0 */
9573
UNIV_INTERN
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int
ha_innobase::cmp_ref(
/*=================*/
9577
	const uchar*	ref1,	/*!< in: an (internal) primary key value in the
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9578
				MySQL key value format */
9579
	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;
9588
	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) {
9612

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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;
9621 9622
			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);
}

9639
/*******************************************************************//**
9640 9641
Ask InnoDB if a query to a table can be cached.
@return	TRUE if query caching of the table is permitted */
9642
UNIV_INTERN
9643 9644 9645
my_bool
ha_innobase::register_query_cache_table(
/*====================================*/
9646 9647
	THD*		thd,		/*!< in: user thread handle */
	char*		table_key,	/*!< in: concatenation of database name,
9648
					the null character NUL,
9649
					and the table name */
9650
	uint		key_length,	/*!< in: length of the full name, i.e.
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					len(dbname) + len(tablename) + 1 */
	qc_engine_callback*
9653
			call_back,	/*!< out: pointer to function for
9654 9655
					checking if query caching
					is permitted */
9656
	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));
}

9665
UNIV_INTERN
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char*
ha_innobase::get_mysql_bin_log_name()
{
	return(trx_sys_mysql_bin_log_name);
}

9672
UNIV_INTERN
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ulonglong
ha_innobase::get_mysql_bin_log_pos()
{
9676
	/* 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. */

9679
	return(trx_sys_mysql_bin_log_pos);
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}

9682
/******************************************************************//**
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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
9686 9687
index field in bytes.
@return	number of bytes occupied by the first n characters */
9688
extern "C" UNIV_INTERN
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ulint
innobase_get_at_most_n_mbchars(
/*===========================*/
9692 9693
	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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9698
{
9699 9700 9701
	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;
9740
		}
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	} else {
		if (data_len < prefix_len) {
			char_length = data_len;
		} else {
			char_length = prefix_len;
		}
	}

	return(char_length);
}

9752
/*******************************************************************//**
9753
This function is used to prepare an X/Open XA distributed transaction.
9754
@return	0 or error number */
9755
static
9756
int
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9757 9758
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;
9768
	trx_t* trx = check_trx_exists(thd);
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9770 9771
	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);
	}

9780
	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);

	if (trx->active_trans == 0 && trx->conc_state != TRX_NOT_STARTED) {

	  sql_print_error("trx->active_trans == 0, but trx->conc_state != "
			  "TRX_NOT_STARTED");
	}

	if (all
9795
		|| (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
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9796

9797 9798
		/* We were instructed to prepare the whole transaction, or
		this is an SQL statement end and autocommit is on */
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9799

9800
		ut_ad(trx->active_trans);
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		error = (int) trx_prepare_for_mysql(trx);
	} else {
9804
		/* We just mark the SQL statement ended and do not do a
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		transaction prepare */

9807 9808
		/* If we had reserved the auto-inc lock for some
		table in this SQL statement we release it now */
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9809

9810
		row_unlock_table_autoinc_for_mysql(trx);
9811

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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)))
	{

		/* 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
9845
		to block for undefined period of time. */
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		pthread_mutex_lock(&prepare_commit_mutex);
		trx->active_trans = 2;
	}

9850
	return(error);
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}

9853
/*******************************************************************//**
9854
This function is used to recover X/Open XA distributed transactions.
9855
@return	number of prepared transactions stored in xid_list */
9856
static
9857
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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9863
{
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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));
}

9874
/*******************************************************************//**
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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 */
9878
static
9879
int
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innobase_commit_by_xid(
/*===================*/
9882
        handlerton *hton,
9883
	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);
9893

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		return(XA_OK);
	} else {
		return(XAER_NOTA);
	}
}

9900
/*******************************************************************//**
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9901
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 */
9904
static
9905
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);
	}
}

9925
/*******************************************************************//**
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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.
9928
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 */
9931
static
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void*
9933
innobase_create_cursor_view(
9934
/*========================*/
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        handlerton *hton, /*!< in: innobase hton */
	THD* thd)	  /*!< in: user thread handle */
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{
9938 9939
	DBUG_ASSERT(hton == innodb_hton_ptr);

9940
	return(read_cursor_view_create_for_mysql(check_trx_exists(thd)));
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}

9943
/*******************************************************************//**
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Close the given consistent cursor view of a transaction and restore
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global read view to a transaction read view. Transaction is created if the
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corresponding MySQL thread still lacks one. */
9947
static
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void
innobase_close_cursor_view(
9950
/*=======================*/
9951
        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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	DBUG_ASSERT(hton == innodb_hton_ptr);

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	read_cursor_view_close_for_mysql(check_trx_exists(thd),
					 (cursor_view_t*) curview);
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}

9961
/*******************************************************************//**
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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
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consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
9966
static
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void
innobase_set_cursor_view(
/*=====================*/
9970
        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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	DBUG_ASSERT(hton == innodb_hton_ptr);

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	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;
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	for (k = 0; k < table->s->fields; k++) {
		field = table->field[k];

		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 */
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static
bool
column_is_being_renamed(
/*====================*/
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	TABLE*		table,		/*!< in: MySQL table */
	uint		n_cols,		/*!< in: number of columns */
	const char**	col_names)	/*!< in: names of the columns */
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{
	uint		j;

	for (j = 0; j < n_cols; j++) {
10032 10033
		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(
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	HA_CREATE_INFO*	info,
	uint		table_changes)
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{
10105
	if (table_changes != IS_EQUAL_YES) {
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		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;
	}

10133
	/* 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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	/* Specifying KEY_BLOCK_SIZE requests a rebuild of the table. */
	if (info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE) {
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		return(COMPATIBLE_DATA_NO);
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	}

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	return(COMPATIBLE_DATA_YES);
10147
}
10148

10149
/************************************************************//**
10150 10151
Validate the file format name and return its corresponding id.
@return	valid file format id */
10152 10153
static
uint
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innobase_file_format_name_lookup(
/*=============================*/
10156
	const char*	format_name)	/*!< in: pointer to file format name */
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{
	char*	endp;
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	uint	format_id;
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	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;

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			name = trx_sys_file_format_id_to_name(format_id);
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			if (!innobase_strcasecmp(format_name, name)) {

				return(format_id);
			}
		}
	}

	return(DICT_TF_FORMAT_MAX + 1);
}

10192
/************************************************************//**
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10193
Validate the file format check value, is it one of "on" or "off",
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as a side effect it sets the srv_check_file_format_at_startup variable.
@return	true if config value one of "on" or  "off" */
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static
bool
innobase_file_format_check_on_off(
/*==============================*/
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	const char*	format_check)	/*!< in: parameter value */
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{
	bool		ret = true;

	if (!innobase_strcasecmp(format_check, "off")) {

		/* Set the value to disable checking. */
		srv_check_file_format_at_startup = DICT_TF_FORMAT_MAX + 1;

	} else if (!innobase_strcasecmp(format_check, "on")) {

		/* Set the value to the lowest supported format. */
		srv_check_file_format_at_startup = DICT_TF_FORMAT_51;
	} else {
		ret = FALSE;
	}

	return(ret);
}

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/************************************************************//**
10221
Validate the file format check config parameters, as a side effect it
10222
sets the srv_check_file_format_at_startup variable.
10223
@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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/*================================*/
10228
	const char*	format_check)	/*!< in: parameter value */
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{
	uint		format_id;
10231

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	format_id = innobase_file_format_name_lookup(format_check);

	if (format_id < DICT_TF_FORMAT_MAX + 1) {
		srv_check_file_format_at_startup = format_id;
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		return((int) format_id);
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	} else {
10239
		return(-1);
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	}
}

10243
/*************************************************************//**
10244
Check if it is a valid file format. This function is registered as
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a callback with MySQL.
@return	0 for valid file format */
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static
int
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innodb_file_format_name_validate(
/*=============================*/
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	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
10253
						variable */
10254
	void*				save,	/*!< out: immediate result
10255
						for update function */
10256
	struct st_mysql_value*		value)	/*!< in: incoming string */
10257 10258
{
	const char*	file_format_input;
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	char		buff[STRING_BUFFER_USUAL_SIZE];
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	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;

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		format_id = innobase_file_format_name_lookup(
			file_format_input);
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		if (format_id <= DICT_TF_FORMAT_MAX) {

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			/* 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);

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			return(0);
		}
	}

10284
	*static_cast<const char**>(save) = NULL;
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	return(1);
}

10288
/****************************************************************//**
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Update the system variable innodb_file_format using the "saved"
value. This function is registered as a callback with MySQL. */
10291
static
10292
void
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innodb_file_format_name_update(
/*===========================*/
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	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
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							system variable */
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	void*				var_ptr,	/*!< out: where the
10299
							formal string goes */
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	const void*			save)		/*!< in: immediate result
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							from check function */
{
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	const char* format_name;

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	ut_a(var_ptr != NULL);
	ut_a(save != NULL);

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	format_name = *static_cast<const char*const*>(save);

	if (format_name) {
		uint	format_id;

		format_id = innobase_file_format_name_lookup(format_name);
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		if (format_id <= DICT_TF_FORMAT_MAX) {
			srv_file_format = format_id;
		}
	}

	*static_cast<const char**>(var_ptr)
10321
		= trx_sys_file_format_id_to_name(srv_file_format);
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}

10324
/*************************************************************//**
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Check if valid argument to innodb_file_format_check. This
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function is registered as a callback with MySQL.
@return	0 for valid file format */
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static
int
innodb_file_format_check_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 */
10335
	void*				save,	/*!< out: immediate result
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						for update function */
10337
	struct st_mysql_value*		value)	/*!< in: incoming string */
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{
	const char*	file_format_input;
	char		buff[STRING_BUFFER_USUAL_SIZE];
	int		len = sizeof(buff);
10342
	int		format_id;
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	ut_a(save != NULL);
	ut_a(value != NULL);

	file_format_input = value->val_str(value, buff, &len);

	if (file_format_input != NULL) {

		/* Check if user set on/off, we want to print a suitable
		message if they did so. */

		if (innobase_file_format_check_on_off(file_format_input)) {
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			push_warning_printf(thd,
				MYSQL_ERROR::WARN_LEVEL_WARN,
				ER_WRONG_ARGUMENTS,
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				"InnoDB: invalid innodb_file_format_check "
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				"value; on/off can only be set at startup or "
				"in the configuration file");
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		} else {
			format_id = innobase_file_format_validate_and_set(
							file_format_input);
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			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);
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10372
				return(0);
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			} else {
				push_warning_printf(thd,
				  MYSQL_ERROR::WARN_LEVEL_WARN,
				  ER_WRONG_ARGUMENTS,
				  "InnoDB: invalid innodb_file_format_check "
				  "value; can be any format up to %s "
				  "or its equivalent numeric id",
				  trx_sys_file_format_id_to_name(
						DICT_TF_FORMAT_MAX));
			}
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		}
	}

10387
	*static_cast<const char**>(save) = NULL;
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	return(1);
}

10391
/****************************************************************//**
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Update the system variable innodb_file_format_check using the "saved"
value. This function is registered as a callback with MySQL. */
static
10395
void
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innodb_file_format_check_update(
/*============================*/
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	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
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							system variable */
10401
	void*				var_ptr,	/*!< out: where the
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							formal string goes */
10403
	const void*			save)		/*!< in: immediate result
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							from check function */
{
10406 10407 10408
	const char*	format_name_in;
	const char**	format_name_out;
	uint		format_id;
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	ut_a(save != NULL);
	ut_a(var_ptr != NULL);

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	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);
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	/* Update the max format id in the system tablespace. */
10434
	if (trx_sys_file_format_max_set(format_id, format_name_out)) {
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		ut_print_timestamp(stderr);
		fprintf(stderr,
			" [Info] InnoDB: the file format in the system "
10438
			"tablespace is now set to %s.\n", *format_name_out);
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	}
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}

10442
/****************************************************************//**
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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(
/*==============================*/
10449 10450
	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
10451
							system variable */
10452
	void*				var_ptr,	/*!< out: where the
10453
							formal string goes */
10454
	const void*			save)		/*!< in: immediate result
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							from check function */
{
	if (*(my_bool*) save) {
		btr_search_enable();
	} else {
		btr_search_disable();
	}
}

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/****************************************************************//**
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);
}

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/*************************************************************//**
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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
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registered as a callback with MySQL.
@return	0 for valid innodb_change_buffering */
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static
int
innodb_change_buffering_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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{
	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) {
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		ibuf_use_t	use;
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		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);
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		}
	}

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	/* No corresponding change buffering option for user supplied
	"change_buffering_input" */
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	return(1);
}

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/****************************************************************//**
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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(
/*===========================*/
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	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 */
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{
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	ibuf_use_t	use;

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	ut_a(var_ptr != NULL);
	ut_a(save != NULL);

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	use = innodb_find_change_buffering_value(
		*static_cast<const char*const*>(save));

	ut_a(use < IBUF_USE_COUNT);
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	ibuf_use = use;
	*static_cast<const char**>(var_ptr) =
		 *static_cast<const char*const*>(save);
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}

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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;
}

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/***********************************************************************
This function checks each index name for a table against reserved
system default primary index name 'GEN_CLUST_INDEX'. If a name matches,
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this function pushes an warning message to the client, and returns true. */
extern "C" UNIV_INTERN
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bool
innobase_index_name_is_reserved(
/*============================*/
					/* out: true if an index name
					matches the reserved name */
	const trx_t*	trx,		/* in: InnoDB transaction handle */
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	const KEY*	key_info,	/* in: Indexes to be created */
	ulint		num_of_keys)	/* in: Number of indexes to
					be created. */
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{
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	const KEY*	key;
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	uint		key_num;	/* index number */

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	for (key_num = 0; key_num < num_of_keys; key_num++) {
		key = &key_info[key_num];
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		if (innobase_strcasecmp(key->name,
					innobase_index_reserve_name) == 0) {
			/* Push warning to mysql */
			push_warning_printf((THD*) trx->mysql_thd,
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					    MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_WRONG_NAME_FOR_INDEX,
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					    "Cannot Create Index with name "
					    "'%s'. The name is reserved "
					    "for the system default primary "
					    "index.",
					    innobase_index_reserve_name);

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			my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0),
				 innobase_index_reserve_name);

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			return(true);
		}
	}

	return(false);
}

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static SHOW_VAR innodb_status_variables_export[]= {
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  {"Innodb",                   (char*) &show_innodb_vars, SHOW_FUNC},
  {NullS, NullS, SHOW_LONG}
};

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static struct st_mysql_storage_engine innobase_storage_engine=
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{ MYSQL_HANDLERTON_INTERFACE_VERSION };
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/* 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);

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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);

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static MYSQL_SYSVAR_ULONG(fast_shutdown, innobase_fast_shutdown,
  PLUGIN_VAR_OPCMDARG,
  "Speeds up the shutdown process of the InnoDB storage engine. Possible "
  "values are 0, 1 (faster)"
  /*
    NetWare can't close unclosed files, can't automatically kill remaining
    threads, etc, so on this OS we disable the crash-like InnoDB shutdown.
  */
  IF_NETWARE("", " or 2 (fastest - crash-like)")
  ".",
  NULL, NULL, 1, 0, IF_NETWARE(1,2), 0);

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static MYSQL_SYSVAR_BOOL(file_per_table, srv_file_per_table,
  PLUGIN_VAR_NOCMDARG,
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  "Stores each InnoDB table to an .ibd file in the database dir.",
  NULL, NULL, FALSE);

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static MYSQL_SYSVAR_STR(file_format, innobase_file_format_name,
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  PLUGIN_VAR_RQCMDARG,
  "File format to use for new tables in .ibd files.",
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  innodb_file_format_name_validate,
  innodb_file_format_name_update, "Antelope");
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/* 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. */
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static MYSQL_SYSVAR_STR(file_format_check, innobase_file_format_check,
  PLUGIN_VAR_OPCMDARG,
  "The highest file format in the tablespace.",
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  innodb_file_format_check_validate,
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  innodb_file_format_check_update, "Barracuda");
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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);

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static MYSQL_SYSVAR_STR(flush_method, innobase_file_flush_method,
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  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.",
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  NULL, NULL, 75, 0, 99, 0);
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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);

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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);
10791

10792
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.",
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  NULL, NULL, 4, 1, 64, 0);
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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.",
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  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.",
10857
  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);
10863

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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.",
10872
  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);

10884
static MYSQL_SYSVAR_LONG(autoinc_lock_mode, innobase_autoinc_lock_mode,
10885
  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_STR(change_buffering, innobase_change_buffering,
  PLUGIN_VAR_RQCMDARG,
  "Buffer changes to reduce random access: "
10908
  "OFF, ON, none, inserts.",
10909
  innodb_change_buffering_validate,
10910
  innodb_change_buffering_update, "inserts"); 
10911

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static MYSQL_SYSVAR_ULONG(read_ahead_threshold, srv_read_ahead_threshold,
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  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),
  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),
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  MYSQL_SYSVAR(file_format_check),
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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(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(change_buffering),
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  MYSQL_SYSVAR(read_ahead_threshold),
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  MYSQL_SYSVAR(io_capacity),
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  NULL
};

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mysql_declare_plugin(innodb_plugin)
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{
  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,
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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,
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 */