ha_innodb.cc 328 KB
Newer Older
1
/*****************************************************************************
2

3
Copyright (c) 2000, 2010, MySQL AB & Innobase Oy. All Rights Reserved.
4
Copyright (c) 2008, 2009 Google Inc.
5
Copyright (c) 2009, Percona Inc.
osku's avatar
osku committed
6

7 8 9 10 11
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.
osku's avatar
osku committed
12

13 14 15 16 17 18 19
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.

20 21 22 23 24 25 26 27 28 29 30 31 32
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

*****************************************************************************/
osku's avatar
osku committed
33 34 35 36 37 38 39 40 41 42 43 44

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

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

45 46
#include <sql_table.h>	// explain_filename, nz2, EXPLAIN_PARTITIONS_AS_COMMENT,
			// EXPLAIN_FILENAME_MAX_EXTRA_LENGTH
47

48
#include <sql_acl.h>	// PROCESS_ACL
osku's avatar
osku committed
49 50
#include <m_ctype.h>
#include <mysys_err.h>
51
#include <mysql/plugin.h>
52
#include <mysql/innodb_priv.h>
53
#include <mysql/psi/psi.h>
54

55 56
/** @file ha_innodb.cc */

57 58
/* Include necessary InnoDB headers */
extern "C" {
59
#include "univ.i"
60
#include "buf0lru.h"
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
#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"
89 90
}

osku's avatar
osku committed
91
#include "ha_innodb.h"
92
#include "i_s.h"
93

94 95 96
# ifndef MYSQL_PLUGIN_IMPORT
#  define MYSQL_PLUGIN_IMPORT /* nothing */
# endif /* MYSQL_PLUGIN_IMPORT */
97

98
/** to protect innobase_open_files */
99
static mysql_mutex_t innobase_share_mutex;
100
/** to force correct commit order in binlog */
101
static mysql_mutex_t prepare_commit_mutex;
102
static ulong commit_threads = 0;
103 104 105
static mysql_mutex_t commit_threads_m;
static mysql_cond_t commit_cond;
static mysql_mutex_t commit_cond_m;
106
static bool innodb_inited = 0;
osku's avatar
osku committed
107

108 109
#define INSIDE_HA_INNOBASE_CC

110 111
/* In the Windows plugin, the return value of current_thd is
undefined.  Map it to NULL. */
112 113 114

#define EQ_CURRENT_THD(thd) ((thd) == current_thd)

115

116
static struct handlerton* innodb_hton_ptr;
117

118 119 120 121
static const long AUTOINC_OLD_STYLE_LOCKING = 0;
static const long AUTOINC_NEW_STYLE_LOCKING = 1;
static const long AUTOINC_NO_LOCKING = 2;

122
static long innobase_mirrored_log_groups, innobase_log_files_in_group,
123
	innobase_log_buffer_size,
124
	innobase_additional_mem_pool_size, innobase_file_io_threads,
125 126
	innobase_force_recovery, innobase_open_files,
	innobase_autoinc_lock_mode;
127
static ulong innobase_commit_concurrency = 0;
128 129
static ulong innobase_read_io_threads;
static ulong innobase_write_io_threads;
irana's avatar
irana committed
130
static long innobase_buffer_pool_instances = 1;
131

132
static long long innobase_buffer_pool_size, innobase_log_file_size;
osku's avatar
osku committed
133

134 135 136 137
/** Percentage of the buffer pool to reserve for 'old' blocks.
Connected to buf_LRU_old_ratio. */
static uint innobase_old_blocks_pct;

osku's avatar
osku committed
138 139
/* The default values for the following char* start-up parameters
are determined in innobase_init below: */
140

141 142 143
static char*	innobase_data_home_dir			= NULL;
static char*	innobase_data_file_path			= NULL;
static char*	innobase_log_group_home_dir		= NULL;
144
static char*	innobase_file_format_name		= NULL;
145
static char*	innobase_change_buffering		= NULL;
146

147 148 149 150
/* The highest file format being used in the database. The value can be
set by user, however, it will be adjusted to the newer file format if
a table of such format is created/opened. */
static char*	innobase_file_format_max		= NULL;
151

152
static char*	innobase_file_flush_method		= NULL;
osku's avatar
osku committed
153 154 155 156

/* Below we have boolean-valued start-up parameters, and their default
values */

157
static ulong	innobase_fast_shutdown			= 1;
158
static my_bool	innobase_file_format_check		= TRUE;
159 160 161 162 163 164 165 166 167
#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;
168
static my_bool	innobase_stats_on_metadata		= TRUE;
osku's avatar
osku committed
169

170

171
static char*	internal_innobase_data_file_path	= NULL;
osku's avatar
osku committed
172

173 174
static char*	innodb_version_str = (char*) INNODB_VERSION_STR;

osku's avatar
osku committed
175 176 177 178 179 180
/* 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
181
static ulong	innobase_active_counter	= 0;
osku's avatar
osku committed
182

183
static hash_table_t*	innobase_open_tables;
osku's avatar
osku committed
184

185
/** Allowed values of innodb_change_buffering */
186
static const char* innobase_change_buffering_values[IBUF_USE_COUNT] = {
187 188 189 190 191 192 193 194
	"none",		/* IBUF_USE_NONE */
	"inserts",	/* IBUF_USE_INSERT */
	"deletes",	/* IBUF_USE_DELETE_MARK */
	"changes",	/* IBUF_USE_INSERT_DELETE_MARK */
	"purges",	/* IBUF_USE_DELETE */
	"all"		/* IBUF_USE_ALL */
};

195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
#ifdef HAVE_PSI_INTERFACE
/* Keys to register pthread mutexes/cond in the current file with
performance schema */
static mysql_pfs_key_t	innobase_share_mutex_key;
static mysql_pfs_key_t	prepare_commit_mutex_key;
static mysql_pfs_key_t	commit_threads_m_key;
static mysql_pfs_key_t	commit_cond_mutex_key;
static mysql_pfs_key_t	commit_cond_key;

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

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

# ifdef UNIV_PFS_MUTEX
/* all_innodb_mutexes array contains mutexes that are
performance schema instrumented if "UNIV_PFS_MUTEX"
is defined */
static PSI_mutex_info all_innodb_mutexes[] = {
	{&autoinc_mutex_key, "autoinc_mutex", 0},
	{&btr_search_enabled_mutex_key, "btr_search_enabled_mutex", 0},
222
#  ifndef PFS_SKIP_BUFFER_MUTEX_RWLOCK
223
	{&buffer_block_mutex_key, "buffer_block_mutex", 0},
224
#  endif /* !PFS_SKIP_BUFFER_MUTEX_RWLOCK */
225 226 227 228 229 230 231 232
	{&buf_pool_mutex_key, "buf_pool_mutex", 0},
	{&buf_pool_zip_mutex_key, "buf_pool_zip_mutex", 0},
	{&cache_last_read_mutex_key, "cache_last_read_mutex", 0},
	{&dict_foreign_err_mutex_key, "dict_foreign_err_mutex", 0},
	{&dict_sys_mutex_key, "dict_sys_mutex", 0},
	{&file_format_max_mutex_key, "file_format_max_mutex", 0},
	{&fil_system_mutex_key, "fil_system_mutex", 0},
	{&flush_list_mutex_key, "flush_list_mutex", 0},
irana's avatar
irana committed
233
	{&log_flush_order_mutex_key, "log_flush_order_mutex", 0},
234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263
	{&hash_table_mutex_key, "hash_table_mutex", 0},
	{&ibuf_bitmap_mutex_key, "ibuf_bitmap_mutex", 0},
	{&ibuf_mutex_key, "ibuf_mutex", 0},
	{&ibuf_pessimistic_insert_mutex_key,
		 "ibuf_pessimistic_insert_mutex", 0},
	{&kernel_mutex_key, "kernel_mutex", 0},
	{&log_sys_mutex_key, "log_sys_mutex", 0},
#  ifdef UNIV_MEM_DEBUG
	{&mem_hash_mutex_key, "mem_hash_mutex", 0},
#  endif /* UNIV_MEM_DEBUG */
	{&mem_pool_mutex_key, "mem_pool_mutex", 0},
	{&mutex_list_mutex_key, "mutex_list_mutex", 0},
	{&purge_sys_mutex_key, "purge_sys_mutex", 0},
	{&recv_sys_mutex_key, "recv_sys_mutex", 0},
	{&rseg_mutex_key, "rseg_mutex", 0},
#  ifdef UNIV_SYNC_DEBUG
	{&rw_lock_debug_mutex_key, "rw_lock_debug_mutex", 0},
#  endif /* UNIV_SYNC_DEBUG */
	{&rw_lock_list_mutex_key, "rw_lock_list_mutex", 0},
	{&rw_lock_mutex_key, "rw_lock_mutex", 0},
	{&srv_dict_tmpfile_mutex_key, "srv_dict_tmpfile_mutex", 0},
	{&srv_innodb_monitor_mutex_key, "srv_innodb_monitor_mutex", 0},
	{&srv_misc_tmpfile_mutex_key, "srv_misc_tmpfile_mutex", 0},
	{&srv_monitor_file_mutex_key, "srv_monitor_file_mutex", 0},
	{&syn_arr_mutex_key, "syn_arr_mutex", 0},
#  ifdef UNIV_SYNC_DEBUG
	{&sync_thread_mutex_key, "sync_thread_mutex", 0},
#  endif /* UNIV_SYNC_DEBUG */
	{&trx_doublewrite_mutex_key, "trx_doublewrite_mutex", 0},
	{&thr_local_mutex_key, "thr_local_mutex", 0},
264
	{&trx_undo_mutex_key, "trx_undo_mutex", 0}
265 266 267 268 269 270 271 272
};
# endif /* UNIV_PFS_MUTEX */

# ifdef UNIV_PFS_RWLOCK
/* all_innodb_rwlocks array contains rwlocks that are
performance schema instrumented if "UNIV_PFS_RWLOCK"
is defined */
static PSI_rwlock_info all_innodb_rwlocks[] = {
273 274 275
#  ifdef UNIV_LOG_ARCHIVE
	{&archive_lock_key, "archive_lock", 0},
#  endif /* UNIV_LOG_ARCHIVE */
276
	{&btr_search_latch_key, "btr_search_latch", 0},
277
#  ifndef PFS_SKIP_BUFFER_MUTEX_RWLOCK
278
	{&buf_block_lock_key, "buf_block_lock", 0},
279
#  endif /* !PFS_SKIP_BUFFER_MUTEX_RWLOCK */
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
#  ifdef UNIV_SYNC_DEBUG
	{&buf_block_debug_latch_key, "buf_block_debug_latch", 0},
#  endif /* UNIV_SYNC_DEBUG */
	{&dict_operation_lock_key, "dict_operation_lock", 0},
	{&fil_space_latch_key, "fil_space_latch", 0},
	{&checkpoint_lock_key, "checkpoint_lock", 0},
	{&trx_i_s_cache_lock_key, "trx_i_s_cache_lock", 0},
	{&trx_purge_latch_key, "trx_purge_latch", 0},
	{&index_tree_rw_lock_key, "index_tree_rw_lock", 0}
};
# endif /* UNIV_PFS_RWLOCK */

# ifdef UNIV_PFS_THREAD
/* all_innodb_threads array contains threads that are
performance schema instrumented if "UNIV_PFS_THREAD"
is defined */
static PSI_thread_info	all_innodb_threads[] = {
	{&trx_rollback_clean_thread_key, "trx_rollback_clean_thread", 0},
	{&io_handler_thread_key, "io_handler_thread", 0},
	{&srv_lock_timeout_thread_key, "srv_lock_timeout_thread", 0},
	{&srv_error_monitor_thread_key, "srv_error_monitor_thread", 0},
	{&srv_monitor_thread_key, "srv_monitor_thread", 0},
302 303
	{&srv_master_thread_key, "srv_master_thread", 0},
	{&srv_purge_thread_key, "srv_purge_thread", 0}
304 305 306 307 308 309 310 311 312 313 314 315 316 317
};
# endif /* UNIV_PFS_THREAD */

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

osku's avatar
osku committed
318 319
static INNOBASE_SHARE *get_share(const char *table_name);
static void free_share(INNOBASE_SHARE *share);
320 321 322
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);
323
static int innobase_rollback_to_savepoint(handlerton *hton, THD* thd,
324 325
           void *savepoint);
static int innobase_savepoint(handlerton *hton, THD* thd, void *savepoint);
326
static int innobase_release_savepoint(handlerton *hton, THD* thd,
327 328 329
           void *savepoint);
static handler *innobase_create_handler(handlerton *hton,
                                        TABLE_SHARE *table,
330
                                        MEM_ROOT *mem_root);
osku's avatar
osku committed
331

332 333 334 335
/* "GEN_CLUST_INDEX" is the name reserved for Innodb default
system primary index. */
static const char innobase_index_reserve_name[]= "GEN_CLUST_INDEX";

336 337 338 339 340 341 342 343 344 345 346 347 348 349
/** @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);
/*==========================================*/

350
/************************************************************//**
351 352
Validate the file format name and return its corresponding id.
@return	valid file format id */
353 354 355 356
static
uint
innobase_file_format_name_lookup(
/*=============================*/
357
	const char*	format_name);		/*!< in: pointer to file format
358
						name */
359
/************************************************************//**
360
Validate the file format check config parameters, as a side effect it
361
sets the srv_max_file_format_at_startup variable.
362
@return	the format_id if valid config value, otherwise, return -1 */
363
static
364 365
int
innobase_file_format_validate_and_set(
366 367
/*==================================*/
	const char*	format_max);		/*!< in: parameter value */
368
/****************************************************************//**
369 370 371 372 373 374 375
Return alter table flags supported in an InnoDB database. */
static
uint
innobase_alter_table_flags(
/*=======================*/
	uint	flags);

376
static const char innobase_hton_name[]= "InnoDB";
377

378
/*************************************************************//**
379 380
Check for a valid value of innobase_commit_concurrency.
@return	0 for valid innodb_commit_concurrency */
381 382 383 384
static
int
innobase_commit_concurrency_validate(
/*=================================*/
385 386
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
387
						variable */
388
	void*				save,	/*!< out: immediate result
389
						for update function */
390
	struct st_mysql_value*		value)	/*!< in: incoming string */
391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409
{
	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));
}

410 411 412 413 414 415 416 417 418 419
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);

420
static MYSQL_THDVAR_BOOL(strict_mode, PLUGIN_VAR_OPCMDARG,
421
  "Use strict mode when evaluating create options.",
422
  NULL, NULL, FALSE);
423

424 425 426 427
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);

428

429
static handler *innobase_create_handler(handlerton *hton,
430
                                        TABLE_SHARE *table,
431
                                        MEM_ROOT *mem_root)
osku's avatar
osku committed
432
{
433
  return new (mem_root) ha_innobase(hton, table);
osku's avatar
osku committed
434 435
}

436 437
/*******************************************************************//**
This function is used to prepare an X/Open XA distributed transaction.
438
@return	0 or error number */
439 440 441 442
static
int
innobase_xa_prepare(
/*================*/
443 444 445 446 447 448 449 450 451
        handlerton*	hton,	/*!< in: InnoDB handlerton */
	THD*		thd,	/*!< in: handle to the MySQL thread of
				the user whose XA transaction should
				be prepared */
	bool		all);	/*!< in: TRUE - commit transaction
				FALSE - the current SQL statement
				ended */
/*******************************************************************//**
This function is used to recover X/Open XA distributed transactions.
452
@return	number of prepared transactions stored in xid_list */
453 454 455 456
static
int
innobase_xa_recover(
/*================*/
457 458 459 460
	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid_list,/*!< in/out: prepared transactions */
	uint		len);	/*!< in: number of slots in xid_list */
/*******************************************************************//**
461
This function is used to commit one X/Open XA distributed transaction
462 463
which is in the prepared state
@return	0 or error number */
464 465 466 467 468
static
int
innobase_commit_by_xid(
/*===================*/
	handlerton* hton,
469
	XID*	xid);	/*!< in: X/Open XA transaction identification */
470
/*******************************************************************//**
471
This function is used to rollback one X/Open XA distributed transaction
472 473
which is in the prepared state
@return	0 or error number */
474 475 476 477
static
int
innobase_rollback_by_xid(
/*=====================*/
478 479 480 481
	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid);	/*!< in: X/Open XA transaction
				identification */
/*******************************************************************//**
482 483 484
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
485 486
using a cursor.
@return	pointer to cursor view or NULL */
487 488 489 490
static
void*
innobase_create_cursor_view(
/*========================*/
491 492
	handlerton*	hton,	/*!< in: innobase hton */
	THD*		thd);	/*!< in: user thread handle */
493
/*******************************************************************//**
494 495 496 497 498 499 500 501 502
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,
503 504
	THD*	thd,	/*!< in: user thread handle */
	void*	curview);/*!< in: Consistent cursor view to be set */
505
/*******************************************************************//**
506 507 508 509 510 511 512 513
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,
514 515
	THD*	thd,	/*!< in: user thread handle */
	void*	curview);/*!< in: Consistent read view to be closed */
516
/*****************************************************************//**
517 518 519 520 521
Removes all tables in the named database inside InnoDB. */
static
void
innobase_drop_database(
/*===================*/
522 523
	handlerton* hton, /*!< in: handlerton of Innodb */
	char*	path);	/*!< in: database path; inside InnoDB the name
524 525 526
			of the last directory in the path is used as
			the database name: for example, in 'mysql/data/test'
			the database name is 'test' */
527
/*******************************************************************//**
528 529 530 531 532
Closes an InnoDB database. */
static
int
innobase_end(handlerton *hton, ha_panic_function type);

533
/*****************************************************************//**
534 535 536
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
537 538
have one.
@return	0 */
539 540 541 542
static
int
innobase_start_trx_and_assign_read_view(
/*====================================*/
543 544 545
			/* out: 0 */
	handlerton* hton, /* in: Innodb handlerton */
	THD*	thd);	/* in: MySQL thread handle of the user for whom
546
			the transaction should be committed */
547
/****************************************************************//**
548
Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
549 550
the logs, and the name of this function should be innobase_checkpoint.
@return	TRUE if error */
551 552 553 554
static
bool
innobase_flush_logs(
/*================*/
555
	handlerton*	hton);	/*!< in: InnoDB handlerton */
556

557
/************************************************************************//**
558 559 560 561 562 563
Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
Monitor to the client. */
static
bool
innodb_show_status(
/*===============*/
564 565
	handlerton*	hton,	/*!< in: the innodb handlerton */
	THD*	thd,	/*!< in: the MySQL query thread of the caller */
566 567
	stat_print_fn *stat_print);
static
568
bool innobase_show_status(handlerton *hton, THD* thd,
569 570
                          stat_print_fn* stat_print,
                          enum ha_stat_type stat_type);
osku's avatar
osku committed
571

572
/*****************************************************************//**
osku's avatar
osku committed
573
Commits a transaction in an InnoDB database. */
574
static
osku's avatar
osku committed
575 576 577
void
innobase_commit_low(
/*================*/
578
	trx_t*	trx);	/*!< in: transaction handle */
osku's avatar
osku committed
579

580
static SHOW_VAR innodb_status_variables[]= {
osku's avatar
osku committed
581
  {"buffer_pool_pages_data",
582
  (char*) &export_vars.innodb_buffer_pool_pages_data,	  SHOW_LONG},
osku's avatar
osku committed
583
  {"buffer_pool_pages_dirty",
584
  (char*) &export_vars.innodb_buffer_pool_pages_dirty,	  SHOW_LONG},
osku's avatar
osku committed
585 586 587
  {"buffer_pool_pages_flushed",
  (char*) &export_vars.innodb_buffer_pool_pages_flushed,  SHOW_LONG},
  {"buffer_pool_pages_free",
588
  (char*) &export_vars.innodb_buffer_pool_pages_free,	  SHOW_LONG},
589
#ifdef UNIV_DEBUG
osku's avatar
osku committed
590 591
  {"buffer_pool_pages_latched",
  (char*) &export_vars.innodb_buffer_pool_pages_latched,  SHOW_LONG},
592
#endif /* UNIV_DEBUG */
osku's avatar
osku committed
593
  {"buffer_pool_pages_misc",
594
  (char*) &export_vars.innodb_buffer_pool_pages_misc,	  SHOW_LONG},
osku's avatar
osku committed
595
  {"buffer_pool_pages_total",
596
  (char*) &export_vars.innodb_buffer_pool_pages_total,	  SHOW_LONG},
597 598 599 600
  {"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},
osku's avatar
osku committed
601 602 603
  {"buffer_pool_read_requests",
  (char*) &export_vars.innodb_buffer_pool_read_requests,  SHOW_LONG},
  {"buffer_pool_reads",
604
  (char*) &export_vars.innodb_buffer_pool_reads,	  SHOW_LONG},
osku's avatar
osku committed
605
  {"buffer_pool_wait_free",
606
  (char*) &export_vars.innodb_buffer_pool_wait_free,	  SHOW_LONG},
osku's avatar
osku committed
607 608 609
  {"buffer_pool_write_requests",
  (char*) &export_vars.innodb_buffer_pool_write_requests, SHOW_LONG},
  {"data_fsyncs",
610
  (char*) &export_vars.innodb_data_fsyncs,		  SHOW_LONG},
osku's avatar
osku committed
611
  {"data_pending_fsyncs",
612
  (char*) &export_vars.innodb_data_pending_fsyncs,	  SHOW_LONG},
osku's avatar
osku committed
613
  {"data_pending_reads",
614
  (char*) &export_vars.innodb_data_pending_reads,	  SHOW_LONG},
osku's avatar
osku committed
615
  {"data_pending_writes",
616
  (char*) &export_vars.innodb_data_pending_writes,	  SHOW_LONG},
osku's avatar
osku committed
617
  {"data_read",
618
  (char*) &export_vars.innodb_data_read,		  SHOW_LONG},
osku's avatar
osku committed
619
  {"data_reads",
620
  (char*) &export_vars.innodb_data_reads,		  SHOW_LONG},
osku's avatar
osku committed
621
  {"data_writes",
622
  (char*) &export_vars.innodb_data_writes,		  SHOW_LONG},
osku's avatar
osku committed
623
  {"data_written",
624
  (char*) &export_vars.innodb_data_written,		  SHOW_LONG},
osku's avatar
osku committed
625
  {"dblwr_pages_written",
626
  (char*) &export_vars.innodb_dblwr_pages_written,	  SHOW_LONG},
osku's avatar
osku committed
627
  {"dblwr_writes",
628
  (char*) &export_vars.innodb_dblwr_writes,		  SHOW_LONG},
629 630
  {"have_atomic_builtins",
  (char*) &export_vars.innodb_have_atomic_builtins,	  SHOW_BOOL},
osku's avatar
osku committed
631
  {"log_waits",
632
  (char*) &export_vars.innodb_log_waits,		  SHOW_LONG},
osku's avatar
osku committed
633
  {"log_write_requests",
634
  (char*) &export_vars.innodb_log_write_requests,	  SHOW_LONG},
osku's avatar
osku committed
635
  {"log_writes",
636
  (char*) &export_vars.innodb_log_writes,		  SHOW_LONG},
osku's avatar
osku committed
637
  {"os_log_fsyncs",
638
  (char*) &export_vars.innodb_os_log_fsyncs,		  SHOW_LONG},
osku's avatar
osku committed
639
  {"os_log_pending_fsyncs",
640
  (char*) &export_vars.innodb_os_log_pending_fsyncs,	  SHOW_LONG},
osku's avatar
osku committed
641
  {"os_log_pending_writes",
642
  (char*) &export_vars.innodb_os_log_pending_writes,	  SHOW_LONG},
osku's avatar
osku committed
643
  {"os_log_written",
644
  (char*) &export_vars.innodb_os_log_written,		  SHOW_LONG},
osku's avatar
osku committed
645
  {"page_size",
646
  (char*) &export_vars.innodb_page_size,		  SHOW_LONG},
osku's avatar
osku committed
647
  {"pages_created",
648
  (char*) &export_vars.innodb_pages_created,		  SHOW_LONG},
osku's avatar
osku committed
649
  {"pages_read",
650
  (char*) &export_vars.innodb_pages_read,		  SHOW_LONG},
osku's avatar
osku committed
651
  {"pages_written",
652
  (char*) &export_vars.innodb_pages_written,		  SHOW_LONG},
osku's avatar
osku committed
653
  {"row_lock_current_waits",
654
  (char*) &export_vars.innodb_row_lock_current_waits,	  SHOW_LONG},
osku's avatar
osku committed
655
  {"row_lock_time",
656
  (char*) &export_vars.innodb_row_lock_time,		  SHOW_LONGLONG},
osku's avatar
osku committed
657
  {"row_lock_time_avg",
658
  (char*) &export_vars.innodb_row_lock_time_avg,	  SHOW_LONG},
osku's avatar
osku committed
659
  {"row_lock_time_max",
660
  (char*) &export_vars.innodb_row_lock_time_max,	  SHOW_LONG},
osku's avatar
osku committed
661
  {"row_lock_waits",
662
  (char*) &export_vars.innodb_row_lock_waits,		  SHOW_LONG},
osku's avatar
osku committed
663
  {"rows_deleted",
664
  (char*) &export_vars.innodb_rows_deleted,		  SHOW_LONG},
osku's avatar
osku committed
665
  {"rows_inserted",
666
  (char*) &export_vars.innodb_rows_inserted,		  SHOW_LONG},
osku's avatar
osku committed
667
  {"rows_read",
668
  (char*) &export_vars.innodb_rows_read,		  SHOW_LONG},
osku's avatar
osku committed
669
  {"rows_updated",
670
  (char*) &export_vars.innodb_rows_updated,		  SHOW_LONG},
671 672
  {"truncated_status_writes",
  (char*) &export_vars.innodb_truncated_status_writes,	SHOW_LONG},
673 674
  {NullS, NullS, SHOW_LONG}
};
osku's avatar
osku committed
675 676 677

/* General functions */

678
/******************************************************************//**
679 680 681 682
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
683 684
srv_conc_force_exit_innodb().
@return	true if thd is the replication thread */
685
extern "C" UNIV_INTERN
686 687 688
ibool
thd_is_replication_slave_thread(
/*============================*/
689
	void*	thd)	/*!< in: thread handle (THD*) */
690 691 692 693
{
	return((ibool) thd_slave_thread((THD*) thd));
}

694
/******************************************************************//**
osku's avatar
osku committed
695 696
Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
697
static inline
osku's avatar
osku committed
698 699 700
void
innodb_srv_conc_enter_innodb(
/*=========================*/
701
	trx_t*	trx)	/*!< in: transaction handle */
osku's avatar
osku committed
702
{
703
	if (UNIV_LIKELY(!srv_thread_concurrency)) {
osku's avatar
osku committed
704 705 706 707 708 709 710

		return;
	}

	srv_conc_enter_innodb(trx);
}

711
/******************************************************************//**
osku's avatar
osku committed
712 713
Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
714
static inline
osku's avatar
osku committed
715 716 717
void
innodb_srv_conc_exit_innodb(
/*========================*/
718
	trx_t*	trx)	/*!< in: transaction handle */
osku's avatar
osku committed
719
{
720
	if (UNIV_LIKELY(!trx->declared_to_be_inside_innodb)) {
osku's avatar
osku committed
721 722 723 724 725 726 727

		return;
	}

	srv_conc_exit_innodb(trx);
}

728
/******************************************************************//**
osku's avatar
osku committed
729 730 731 732
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. */
733
static inline
osku's avatar
osku committed
734 735 736
void
innobase_release_stat_resources(
/*============================*/
737
	trx_t*	trx)	/*!< in: transaction object */
osku's avatar
osku committed
738 739 740 741 742 743 744 745 746 747 748 749
{
	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);
	}
}

750
/******************************************************************//**
751 752 753
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
754 755
rolling back transactions that have edited non-transactional tables.
@return	true if non-transactional tables have been edited */
756
extern "C" UNIV_INTERN
757 758 759
ibool
thd_has_edited_nontrans_tables(
/*===========================*/
760
	void*	thd)	/*!< in: thread handle (THD*) */
761 762 763 764
{
	return((ibool) thd_non_transactional_update((THD*) thd));
}

765
/******************************************************************//**
766 767
Returns true if the thread is executing a SELECT statement.
@return	true if thd is executing SELECT */
768 769 770 771
extern "C" UNIV_INTERN
ibool
thd_is_select(
/*==========*/
772
	const void*	thd)	/*!< in: thread handle (THD*) */
773 774 775 776
{
	return(thd_sql_command((const THD*) thd) == SQLCOM_SELECT);
}

777
/******************************************************************//**
778
Returns true if the thread supports XA,
779 780
global value of innodb_supports_xa if thd is NULL.
@return	true if thd has XA support */
781
extern "C" UNIV_INTERN
782
ibool
783 784
thd_supports_xa(
/*============*/
785
	void*	thd)	/*!< in: thread handle (THD*), or NULL to query
786
			the global innodb_supports_xa */
787
{
788
	return(THDVAR((THD*) thd, support_xa));
789 790
}

791
/******************************************************************//**
792 793
Returns the lock wait timeout for the current connection.
@return	the lock wait timeout, in seconds */
794 795 796 797
extern "C" UNIV_INTERN
ulong
thd_lock_wait_timeout(
/*==================*/
798
	void*	thd)	/*!< in: thread handle (THD*), or NULL to query
799 800 801 802 803 804 805
			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));
}

806 807 808 809 810 811 812 813 814 815 816 817 818 819
/******************************************************************//**
Set the time waited for the lock for the current query. */
extern "C" UNIV_INTERN
void
thd_set_lock_wait_time(
/*===================*/
	void*	thd,	/*!< in: thread handle (THD*) */
	ulint	value)	/*!< in: time waited for the lock */
{
	if (thd) {
		thd_storage_lock_wait((THD*)thd, value);
	}
}

820
/********************************************************************//**
821 822
Obtain the InnoDB transaction of a MySQL thread.
@return	reference to transaction pointer */
823
static inline
824 825 826
trx_t*&
thd_to_trx(
/*=======*/
827
	THD*	thd)	/*!< in: MySQL thread */
828
{
829
	return(*(trx_t**) thd_ha_data(thd, innodb_hton_ptr));
830 831
}

832
/********************************************************************//**
osku's avatar
osku committed
833 834
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
835 836
documentation, see handler.cc.
@return	0 */
837
static
osku's avatar
osku committed
838
int
osku's avatar
osku committed
839 840
innobase_release_temporary_latches(
/*===============================*/
841 842
	handlerton*	hton,	/*!< in: handlerton */
	THD*		thd)	/*!< in: MySQL thread */
osku's avatar
osku committed
843 844 845
{
	trx_t*	trx;

846 847
	DBUG_ASSERT(hton == innodb_hton_ptr);

osku's avatar
osku committed
848
	if (!innodb_inited) {
849

850
		return(0);
osku's avatar
osku committed
851 852
	}

853
	trx = thd_to_trx(thd);
osku's avatar
osku committed
854 855

	if (trx) {
856
		innobase_release_stat_resources(trx);
osku's avatar
osku committed
857
	}
858
	return(0);
osku's avatar
osku committed
859 860
}

861
/********************************************************************//**
osku's avatar
osku committed
862 863 864 865
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. */
866
static inline
osku's avatar
osku committed
867 868 869 870 871 872 873 874 875 876 877
void
innobase_active_small(void)
/*=======================*/
{
	innobase_active_counter++;

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

878
/********************************************************************//**
osku's avatar
osku committed
879 880
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
881 882
timeout or a deadlock.
@return	MySQL error code */
883
extern "C" UNIV_INTERN
osku's avatar
osku committed
884 885 886
int
convert_error_code_to_mysql(
/*========================*/
887 888 889
	int	error,	/*!< in: InnoDB error code */
	ulint	flags,	/*!< in: InnoDB table flags, or 0 */
	THD*	thd)	/*!< in: user thread handle or NULL */
osku's avatar
osku committed
890
{
891 892
	switch (error) {
	case DB_SUCCESS:
osku's avatar
osku committed
893 894
		return(0);

895 896 897
	case DB_INTERRUPTED:
		my_error(ER_QUERY_INTERRUPTED, MYF(0));
		/* fall through */
898 899 900 901 902 903 904 905 906 907 908 909 910

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

		/* fall through */

911 912 913
	case DB_ERROR:
	default:
		return(-1); /* unspecified error */
osku's avatar
osku committed
914

915
	case DB_DUPLICATE_KEY:
916 917 918 919 920 921
		/* 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. */
922
		return(HA_ERR_FOUND_DUPP_KEY);
osku's avatar
osku committed
923

924
	case DB_FOREIGN_DUPLICATE_KEY:
925 926
		return(HA_ERR_FOREIGN_DUPLICATE_KEY);

927 928 929
	case DB_MISSING_HISTORY:
		return(HA_ERR_TABLE_DEF_CHANGED);

930
	case DB_RECORD_NOT_FOUND:
931
		return(HA_ERR_NO_ACTIVE_RECORD);
osku's avatar
osku committed
932

933
	case DB_DEADLOCK:
934 935 936
		/* 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 */
osku's avatar
osku committed
937

938
		if (thd) {
939
			thd_mark_transaction_to_rollback(thd, TRUE);
940
		}
osku's avatar
osku committed
941

942
		return(HA_ERR_LOCK_DEADLOCK);
osku's avatar
osku committed
943

944
	case DB_LOCK_WAIT_TIMEOUT:
osku's avatar
osku committed
945 946 947 948
		/* 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. */

949 950 951
		if (thd) {
			thd_mark_transaction_to_rollback(
				thd, (bool)row_rollback_on_timeout);
952 953
		}

954
		return(HA_ERR_LOCK_WAIT_TIMEOUT);
osku's avatar
osku committed
955

956
	case DB_NO_REFERENCED_ROW:
957
		return(HA_ERR_NO_REFERENCED_ROW);
osku's avatar
osku committed
958

959
	case DB_ROW_IS_REFERENCED:
960
		return(HA_ERR_ROW_IS_REFERENCED);
osku's avatar
osku committed
961

962
	case DB_CANNOT_ADD_CONSTRAINT:
963
		return(HA_ERR_CANNOT_ADD_FOREIGN);
osku's avatar
osku committed
964

965
	case DB_CANNOT_DROP_CONSTRAINT:
osku's avatar
osku committed
966

967
		return(HA_ERR_ROW_IS_REFERENCED); /* TODO: This is a bit
osku's avatar
osku committed
968 969 970
						misleading, a new MySQL error
						code should be introduced */

971 972
	case DB_COL_APPEARS_TWICE_IN_INDEX:
	case DB_CORRUPTION:
973
		return(HA_ERR_CRASHED);
osku's avatar
osku committed
974

975
	case DB_OUT_OF_FILE_SPACE:
976
		return(HA_ERR_RECORD_FILE_FULL);
osku's avatar
osku committed
977

978
	case DB_TABLE_IS_BEING_USED:
979
		return(HA_ERR_WRONG_COMMAND);
osku's avatar
osku committed
980

981
	case DB_TABLE_NOT_FOUND:
982
		return(HA_ERR_NO_SUCH_TABLE);
osku's avatar
osku committed
983

984
	case DB_TOO_BIG_RECORD:
985 986 987
		my_error(ER_TOO_BIG_ROWSIZE, MYF(0),
			 page_get_free_space_of_empty(flags
						      & DICT_TF_COMPACT) / 2);
988
		return(HA_ERR_TO_BIG_ROW);
osku's avatar
osku committed
989

990
	case DB_NO_SAVEPOINT:
991
		return(HA_ERR_NO_SAVEPOINT);
992 993

	case DB_LOCK_TABLE_FULL:
994 995 996 997 998
		/* 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) {
999
			thd_mark_transaction_to_rollback(thd, TRUE);
1000
		}
1001

1002
		return(HA_ERR_LOCK_TABLE_FULL);
1003

1004 1005 1006
	case DB_PRIMARY_KEY_IS_NULL:
		return(ER_PRIMARY_CANT_HAVE_NULL);

1007
	case DB_TOO_MANY_CONCURRENT_TRXS:
1008 1009 1010 1011 1012 1013
		/* 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 */
1014
		return(HA_ERR_RECORD_FILE_FULL);
1015
#endif /* HA_ERR_TOO_MANY_CONCURRENT_TRXS */
1016 1017
	case DB_UNSUPPORTED:
		return(HA_ERR_UNSUPPORTED);
1018
	}
osku's avatar
osku committed
1019 1020
}

1021
/*************************************************************//**
1022
Prints info of a THD object (== user session thread) to the given file. */
1023
extern "C" UNIV_INTERN
osku's avatar
osku committed
1024 1025 1026
void
innobase_mysql_print_thd(
/*=====================*/
1027 1028 1029
	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
osku's avatar
osku committed
1030 1031
				   use the default max length */
{
1032
	char	buffer[1024];
osku's avatar
osku committed
1033

1034
	fputs(thd_security_context((THD*) thd, buffer, sizeof buffer,
1035
				   max_query_len), f);
osku's avatar
osku committed
1036 1037 1038
	putc('\n', f);
}

1039
/******************************************************************//**
1040 1041
Get the variable length bounds of the given character set. */
extern "C" UNIV_INTERN
osku's avatar
osku committed
1042 1043 1044
void
innobase_get_cset_width(
/*====================*/
1045 1046 1047
	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) */
osku's avatar
osku committed
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
{
	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;
1058 1059
		ut_ad(*mbminlen < DATA_MBMAX);
		ut_ad(*mbmaxlen < DATA_MBMAX);
osku's avatar
osku committed
1060
	} else {
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077
		THD*	thd = current_thd;

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

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

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

			ut_a(cset == 0);
		}

osku's avatar
osku committed
1078 1079 1080 1081
		*mbminlen = *mbmaxlen = 0;
	}
}

1082
/******************************************************************//**
1083
Converts an identifier to a table name. */
1084
extern "C" UNIV_INTERN
1085 1086 1087
void
innobase_convert_from_table_id(
/*===========================*/
1088 1089 1090 1091
	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 */
1092 1093 1094
{
	uint	errors;

1095
	strconvert(cs, from, &my_charset_filename, to, (uint) len, &errors);
1096 1097
}

1098
/******************************************************************//**
1099
Converts an identifier to UTF-8. */
1100
extern "C" UNIV_INTERN
1101 1102 1103
void
innobase_convert_from_id(
/*=====================*/
1104 1105 1106 1107
	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 */
1108 1109 1110
{
	uint	errors;

1111
	strconvert(cs, from, system_charset_info, to, (uint) len, &errors);
1112 1113
}

1114
/******************************************************************//**
1115 1116
Compares NUL-terminated UTF-8 strings case insensitively.
@return	0 if a=b, <0 if a<b, >1 if a>b */
1117
extern "C" UNIV_INTERN
osku's avatar
osku committed
1118 1119 1120
int
innobase_strcasecmp(
/*================*/
1121 1122
	const char*	a,	/*!< in: first string to compare */
	const char*	b)	/*!< in: second string to compare */
osku's avatar
osku committed
1123 1124 1125 1126
{
	return(my_strcasecmp(system_charset_info, a, b));
}

1127
/******************************************************************//**
1128
Makes all characters in a NUL-terminated UTF-8 string lower case. */
1129
extern "C" UNIV_INTERN
osku's avatar
osku committed
1130 1131 1132
void
innobase_casedn_str(
/*================*/
1133
	char*	a)	/*!< in/out: string to put in lower case */
osku's avatar
osku committed
1134 1135 1136 1137
{
	my_casedn_str(system_charset_info, a);
}

1138
/**********************************************************************//**
1139 1140
Determines the connection character set.
@return	connection character set */
1141
extern "C" UNIV_INTERN
1142 1143 1144
struct charset_info_st*
innobase_get_charset(
/*=================*/
1145
	void*	mysql_thd)	/*!< in: MySQL thread handle */
1146
{
1147
	return(thd_charset((THD*) mysql_thd));
1148 1149
}

1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
/**********************************************************************//**
Determines the current SQL statement.
@return	SQL statement string */
extern "C" UNIV_INTERN
const char*
innobase_get_stmt(
/*==============*/
	void*	mysql_thd,	/*!< in: MySQL thread handle */
	size_t*	length)		/*!< out: length of the SQL statement */
{
	LEX_STRING* stmt;

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

1167
#if defined (__WIN__) && defined (MYSQL_DYNAMIC_PLUGIN)
1168
extern MYSQL_PLUGIN_IMPORT MY_TMPDIR mysql_tmpdir_list;
1169
/*******************************************************************//**
1170 1171 1172 1173 1174
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(
1175
	unsigned long);	/*!< in: OS error value */
1176

1177
/*********************************************************************//**
1178 1179
Creates a temporary file.
@return	temporary file descriptor, or < 0 on error */
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260
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
1261
/*********************************************************************//**
1262 1263
Creates a temporary file.
@return	temporary file descriptor, or < 0 on error */
1264
extern "C" UNIV_INTERN
osku's avatar
osku committed
1265 1266 1267 1268
int
innobase_mysql_tmpfile(void)
/*========================*/
{
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
	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(). */
1280 1281

#ifdef _WIN32
1282
		/* Note that on Windows, the integer returned by mysql_tmpfile
1283
		has no relation to C runtime file descriptor. Here, we need
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300
		to call my_get_osfhandle to get the HANDLE and then convert it 
		to C runtime filedescriptor. */
		{
			HANDLE hFile = my_get_osfhandle(fd);
			HANDLE hDup;
			BOOL bOK = 
				DuplicateHandle(GetCurrentProcess(), hFile, GetCurrentProcess(),
								&hDup, 0, FALSE, DUPLICATE_SAME_ACCESS);
			if(bOK) {
				fd2 = _open_osfhandle((intptr_t)hDup,0);
			}
			else {
				my_osmaperr(GetLastError());
				fd2 = -1;
			}	
		}
#else
1301
		fd2 = dup(fd);
1302
#endif
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
		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);
osku's avatar
osku committed
1313
}
1314
#endif /* defined (__WIN__) && defined (MYSQL_DYNAMIC_PLUGIN) */
osku's avatar
osku committed
1315

1316
/*********************************************************************//**
1317 1318
Wrapper around MySQL's copy_and_convert function.
@return	number of bytes copied to 'to' */
1319
extern "C" UNIV_INTERN
1320 1321 1322
ulint
innobase_convert_string(
/*====================*/
1323 1324
	void*		to,		/*!< out: converted string */
	ulint		to_length,	/*!< in: number of bytes reserved
1325
					for the converted string */
1326 1327 1328 1329 1330
	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
1331
					during the conversion */
1332
{
1333 1334 1335
  return(copy_and_convert((char*)to, (uint32) to_length, to_cs,
                          (const char*)from, (uint32) from_length, from_cs,
                          errors));
1336 1337
}

1338
/*******************************************************************//**
1339 1340 1341 1342
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".
1343
The result is always NUL-terminated (provided buf_size > 0) and the
1344
number of bytes that were written to "buf" is returned (including the
1345
terminating NUL).
1346
@return	number of bytes that were written */
1347 1348 1349 1350
extern "C" UNIV_INTERN
ulint
innobase_raw_format(
/*================*/
1351 1352
	const char*	data,		/*!< in: raw data */
	ulint		data_len,	/*!< in: raw data length
1353
					in bytes */
1354 1355 1356
	ulint		charset_coll,	/*!< in: charset collation */
	char*		buf,		/*!< out: output buffer */
	ulint		buf_size)	/*!< in: output buffer size
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
					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));
}

1376
/*********************************************************************//**
1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391
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
1392 1393
to reserve 3 values for the multi-value INSERT above.
@return	the next value */
1394 1395 1396 1397
static
ulonglong
innobase_next_autoinc(
/*==================*/
1398 1399 1400 1401
	ulonglong	current,	/*!< in: Current value */
	ulonglong	increment,	/*!< in: increment current by */
	ulonglong	offset,		/*!< in: AUTOINC offset */
	ulonglong	max_value)	/*!< in: max value for type */
1402 1403 1404 1405 1406 1407
{
	ulonglong	next_value;

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

1408 1409 1410 1411 1412 1413
	/* According to MySQL documentation, if the offset is greater than
	the increment then the offset is ignored. */
	if (offset > increment) {
		offset = 0;
	}

1414 1415 1416
	if (max_value <= current) {
		next_value = max_value;
	} else if (offset <= 1) {
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440
		/* Offset 0 and 1 are the same, because there must be at
		least one node in the system. */
		if (max_value - current <= increment) {
			next_value = max_value;
		} else {
			next_value = current + increment;
		}
	} else if (max_value > current) {
		if (current > offset) {
			next_value = ((current - offset) / increment) + 1;
		} else {
			next_value = ((offset - current) / increment) + 1;
		}

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

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

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

1441 1442
			ut_a(max_value >= next_value);

1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458
			/* Check for overflow. */
			if (max_value - next_value <= offset) {
				next_value = max_value;
			} else {
				next_value += offset;
			}
		}
	} else {
		next_value = max_value;
	}

	ut_a(next_value <= max_value);

	return(next_value);
}

1459
/*********************************************************************//**
1460 1461 1462 1463 1464
Initializes some fields in an InnoDB transaction object. */
static
void
innobase_trx_init(
/*==============*/
1465 1466
	THD*	thd,	/*!< in: user thread handle */
	trx_t*	trx)	/*!< in/out: InnoDB transaction handle */
1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
{
	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;
}

1481
/*********************************************************************//**
1482 1483
Allocates an InnoDB transaction for a MySQL handler object.
@return	InnoDB transaction handle */
1484 1485 1486 1487
extern "C" UNIV_INTERN
trx_t*
innobase_trx_allocate(
/*==================*/
1488
	THD*	thd)	/*!< in: user thread handle */
1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504
{
	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);
}

1505
/*********************************************************************//**
osku's avatar
osku committed
1506 1507
Gets the InnoDB transaction handle for a MySQL handler object, creates
an InnoDB transaction struct if the corresponding MySQL thread struct still
1508 1509
lacks one.
@return	InnoDB transaction handle */
1510
static inline
osku's avatar
osku committed
1511 1512 1513
trx_t*
check_trx_exists(
/*=============*/
1514
	THD*	thd)	/*!< in: user thread handle */
osku's avatar
osku committed
1515
{
1516
	trx_t*&	trx = thd_to_trx(thd);
osku's avatar
osku committed
1517

1518
	ut_ad(EQ_CURRENT_THD(thd));
osku's avatar
osku committed
1519 1520

	if (trx == NULL) {
1521 1522 1523 1524
		trx = innobase_trx_allocate(thd);
	} else if (UNIV_UNLIKELY(trx->magic_n != TRX_MAGIC_N)) {
		mem_analyze_corruption(trx);
		ut_error;
osku's avatar
osku committed
1525 1526
	}

1527
	innobase_trx_init(thd, trx);
osku's avatar
osku committed
1528 1529 1530 1531

	return(trx);
}

1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602
/*********************************************************************//**
Note that a transaction has been registered with MySQL.
@return true if transaction is registered with MySQL 2PC coordinator */
static inline
bool
trx_is_registered_for_2pc(
/*=========================*/
	const trx_t*	trx)	/* in: transaction */
{
	return(trx->is_registered == 1);
}

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

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

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

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

/*********************************************************************//**
Check if transaction is started.
@reutrn true if transaction is in state started */
static
bool
trx_is_started(
/*===========*/
	trx_t*	trx)	/* in: transaction */
{
	return(trx->conc_state != TRX_NOT_STARTED);
}
osku's avatar
osku committed
1603

1604
/*********************************************************************//**
osku's avatar
osku committed
1605
Construct ha_innobase handler. */
1606
UNIV_INTERN
1607 1608
ha_innobase::ha_innobase(handlerton *hton, TABLE_SHARE *table_arg)
  :handler(hton, table_arg),
osku's avatar
osku committed
1609
  int_table_flags(HA_REC_NOT_IN_SEQ |
1610 1611 1612
		  HA_NULL_IN_KEY |
		  HA_CAN_INDEX_BLOBS |
		  HA_CAN_SQL_HANDLER |
1613
		  HA_PRIMARY_KEY_REQUIRED_FOR_POSITION |
1614
		  HA_PRIMARY_KEY_IN_READ_INDEX |
1615
		  HA_BINLOG_ROW_CAPABLE |
1616
		  HA_CAN_GEOMETRY | HA_PARTIAL_COLUMN_READ |
1617
		  HA_TABLE_SCAN_ON_INDEX),
osku's avatar
osku committed
1618 1619 1620 1621
  start_of_scan(0),
  num_write_row(0)
{}

1622
/*********************************************************************//**
1623 1624 1625 1626 1627 1628
Destruct ha_innobase handler. */
UNIV_INTERN
ha_innobase::~ha_innobase()
{
}

1629
/*********************************************************************//**
osku's avatar
osku committed
1630 1631 1632
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. */
1633
UNIV_INTERN inline
marko's avatar
marko committed
1634
void
osku's avatar
osku committed
1635 1636
ha_innobase::update_thd(
/*====================*/
1637
	THD*	thd)	/*!< in: thd to use the handle */
osku's avatar
osku committed
1638 1639 1640
{
	trx_t*		trx;

1641
	trx = check_trx_exists(thd);
osku's avatar
osku committed
1642 1643 1644 1645 1646 1647 1648

	if (prebuilt->trx != trx) {

		row_update_prebuilt_trx(prebuilt, trx);
	}

	user_thd = thd;
marko's avatar
marko committed
1649
}
osku's avatar
osku committed
1650

1651
/*********************************************************************//**
marko's avatar
marko committed
1652 1653 1654
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. */
1655
UNIV_INTERN
marko's avatar
marko committed
1656 1657 1658 1659 1660
void
ha_innobase::update_thd()
/*=====================*/
{
	THD*	thd = ha_thd();
1661
	ut_ad(EQ_CURRENT_THD(thd));
marko's avatar
marko committed
1662
	update_thd(thd);
osku's avatar
osku committed
1663 1664
}

1665
/*********************************************************************//**
1666 1667 1668 1669 1670 1671
Registers an InnoDB transaction with the MySQL 2PC coordinator, so that
the MySQL XA code knows to call the InnoDB prepare and commit, or rollback
for the transaction. This MUST be called for every transaction for which
the user may call commit or rollback. Calling this several times to register
the same transaction is allowed, too. This function also registers the
current SQL statement. */
1672
static inline
osku's avatar
osku committed
1673
void
1674 1675 1676 1677 1678
innobase_register_trx(
/*==================*/
	handlerton*	hton,	/* in: Innobase handlerton */
	THD*		thd,	/* in: MySQL thd (connection) object */
	trx_t*		trx)	/* in: transaction to register */
osku's avatar
osku committed
1679
{
1680
	trans_register_ha(thd, FALSE, hton);
osku's avatar
osku committed
1681

1682 1683
	if (!trx_is_registered_for_2pc(trx)
	    && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
1684

1685
		trans_register_ha(thd, TRUE, hton);
1686
	}
osku's avatar
osku committed
1687

1688 1689 1690
	trx_register_for_2pc(trx);
}
  
osku's avatar
osku committed
1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733
/*   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.
*/

1734
/******************************************************************//**
osku's avatar
osku committed
1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750
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
1751
the InnoDB kernel mutex.
1752 1753 1754
@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 */
1755
static
osku's avatar
osku committed
1756 1757 1758
my_bool
innobase_query_caching_of_table_permitted(
/*======================================*/
1759
	THD*	thd,		/*!< in: thd of the user who is trying to
osku's avatar
osku committed
1760 1761
				store a result to the query cache or
				retrieve it */
1762
	char*	full_name,	/*!< in: concatenation of database name,
1763
				the null character NUL, and the table
osku's avatar
osku committed
1764
				name */
1765
	uint	full_name_len,	/*!< in: length of the full name, i.e.
osku's avatar
osku committed
1766
				len(dbname) + len(tablename) + 1 */
1767
	ulonglong *unused)	/*!< unused for this engine */
osku's avatar
osku committed
1768 1769 1770 1771 1772 1773 1774
{
	ibool	is_autocommit;
	trx_t*	trx;
	char	norm_name[1000];

	ut_a(full_name_len < 999);

1775 1776 1777
	trx = check_trx_exists(thd);

	if (trx->isolation_level == TRX_ISO_SERIALIZABLE) {
osku's avatar
osku committed
1778 1779
		/* In the SERIALIZABLE mode we add LOCK IN SHARE MODE to every
		plain SELECT if AUTOCOMMIT is not on. */
1780

osku's avatar
osku committed
1781 1782 1783 1784 1785 1786 1787
		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.");
1788

1789
		mutex_enter(&kernel_mutex);
1790
		trx_print(stderr, trx, 1024);
1791
		mutex_exit(&kernel_mutex);
osku's avatar
osku committed
1792 1793 1794 1795
	}

	innobase_release_stat_resources(trx);

1796
	if (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824

		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);
	}
1825

osku's avatar
osku committed
1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
	/* 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

1837
	innobase_register_trx(innodb_hton_ptr, thd, trx);
osku's avatar
osku committed
1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850

	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);
}

1851
/*****************************************************************//**
1852
Invalidates the MySQL query cache for the table. */
1853
extern "C" UNIV_INTERN
osku's avatar
osku committed
1854 1855 1856
void
innobase_invalidate_query_cache(
/*============================*/
1857
	trx_t*		trx,		/*!< in: transaction which
1858
					modifies the table */
1859
	const char*	full_name,	/*!< in: concatenation of
1860 1861
					database name, null char NUL,
					table name, null char NUL;
1862 1863
					NOTE that in Windows this is
					always in LOWER CASE! */
1864
	ulint		full_name_len)	/*!< in: full name length where
1865
					also the null chars count */
osku's avatar
osku committed
1866 1867 1868 1869 1870 1871 1872
{
	/* 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
1873
	mysql_query_cache_invalidate4((THD*) trx->mysql_thd,
1874
				      full_name,
1875 1876
				      (uint32) full_name_len,
				      TRUE);
osku's avatar
osku committed
1877 1878 1879
#endif
}

1880
/*****************************************************************//**
1881
Convert an SQL identifier to the MySQL system_charset_info (UTF-8)
1882 1883
and quote it if needed.
@return	pointer to the end of buf */
1884 1885 1886 1887
static
char*
innobase_convert_identifier(
/*========================*/
1888 1889 1890 1891 1892 1893
	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;
1894
				FALSE=id is an UTF-8 string */
osku's avatar
osku committed
1895
{
1896
	char nz[NAME_LEN + 1];
1897
	char nz2[NAME_LEN + 1 + EXPLAIN_FILENAME_MAX_EXTRA_LENGTH];
1898 1899

	const char*	s	= id;
1900 1901
	int		q;

1902
	if (file_id) {
1903 1904 1905
		/* Decode the table name.  The MySQL function expects
		a NUL-terminated string.  The input and output strings
		buffers must not be shared. */
1906 1907 1908

		if (UNIV_UNLIKELY(idlen > (sizeof nz) - 1)) {
			idlen = (sizeof nz) - 1;
1909 1910
		}

1911 1912
		memcpy(nz, id, idlen);
		nz[idlen] = 0;
1913

1914
		s = nz2;
1915 1916 1917
		idlen = explain_filename((THD*) thd, nz, nz2, sizeof nz2,
					 EXPLAIN_PARTITIONS_AS_COMMENT);
		goto no_quote;
1918 1919 1920 1921
	}

	/* See if the identifier needs to be quoted. */
	if (UNIV_UNLIKELY(!thd)) {
1922 1923
		q = '"';
	} else {
1924
		q = get_quote_char_for_identifier((THD*) thd, s, (int) idlen);
osku's avatar
osku committed
1925
	}
1926 1927

	if (q == EOF) {
1928
no_quote:
1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948
		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;
1949
			}
1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967

			*buf++ = c;
			*buf++ = c;
			buflen -= 2;
		} else {
			if (UNIV_UNLIKELY(buflen < 2)) {
				break;
			}

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

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

1968
/*****************************************************************//**
1969
Convert a table or index name to the MySQL system_charset_info (UTF-8)
1970 1971
and quote it if needed.
@return	pointer to the end of buf */
1972
extern "C" UNIV_INTERN
1973 1974 1975
char*
innobase_convert_name(
/*==================*/
1976 1977 1978 1979 1980 1981
	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;
1982 1983 1984 1985 1986 1987 1988 1989 1990 1991
				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;
1992
		}
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

		/* 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);
2019 2020
	}

2021 2022
	return(s);

osku's avatar
osku committed
2023 2024
}

2025
/**********************************************************************//**
2026 2027
Determines if the currently running transaction has been interrupted.
@return	TRUE if interrupted */
2028
extern "C" UNIV_INTERN
osku's avatar
osku committed
2029 2030 2031
ibool
trx_is_interrupted(
/*===============*/
2032
	trx_t*	trx)	/*!< in: transaction */
osku's avatar
osku committed
2033
{
2034
	return(trx && trx->mysql_thd && thd_killed((THD*) trx->mysql_thd));
osku's avatar
osku committed
2035 2036
}

2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
/**********************************************************************//**
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));
}

2050
/**************************************************************//**
2051 2052 2053 2054 2055 2056
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(
/*===========*/
2057
	row_prebuilt_t*	prebuilt)	/*!< in/out: prebuilt struct */
2058 2059 2060 2061 2062
{
	prebuilt->keep_other_fields_on_keyread = 0;
	prebuilt->read_just_key = 0;
}

2063
/*****************************************************************//**
osku's avatar
osku committed
2064 2065 2066 2067 2068
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. */
2069
UNIV_INTERN
osku's avatar
osku committed
2070 2071 2072 2073
void
ha_innobase::init_table_handle_for_HANDLER(void)
/*============================================*/
{
2074 2075 2076 2077
	/* 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. */
osku's avatar
osku committed
2078

2079
	update_thd(ha_thd());
osku's avatar
osku committed
2080

2081 2082
	/* Initialize the prebuilt struct much like it would be inited in
	external_lock */
osku's avatar
osku committed
2083 2084 2085

	innobase_release_stat_resources(prebuilt->trx);

2086
	/* If the transaction is not started yet, start it */
osku's avatar
osku committed
2087

2088
	trx_start_if_not_started(prebuilt->trx);
osku's avatar
osku committed
2089

2090
	/* Assign a read view if the transaction does not have it yet */
osku's avatar
osku committed
2091

2092
	trx_assign_read_view(prebuilt->trx);
osku's avatar
osku committed
2093

2094
	innobase_register_trx(ht, user_thd, prebuilt->trx);
osku's avatar
osku committed
2095

2096 2097
	/* We did the necessary inits in this function, no need to repeat them
	in row_search_for_mysql */
osku's avatar
osku committed
2098

2099
	prebuilt->sql_stat_start = FALSE;
osku's avatar
osku committed
2100

2101 2102
	/* We let HANDLER always to do the reads as consistent reads, even
	if the trx isolation level would have been specified as SERIALIZABLE */
osku's avatar
osku committed
2103

2104 2105
	prebuilt->select_lock_type = LOCK_NONE;
	prebuilt->stored_select_lock_type = LOCK_NONE;
osku's avatar
osku committed
2106

2107
	/* Always fetch all columns in the index record */
osku's avatar
osku committed
2108

2109
	prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
osku's avatar
osku committed
2110

2111
	/* We want always to fetch all columns in the whole row? Or do
osku's avatar
osku committed
2112 2113 2114
	we???? */

	prebuilt->used_in_HANDLER = TRUE;
2115
	reset_template(prebuilt);
osku's avatar
osku committed
2116 2117
}

2118
/*********************************************************************//**
2119 2120
Opens an InnoDB database.
@return	0 on success, error code on failure */
2121
static
2122
int
2123 2124
innobase_init(
/*==========*/
2125
	void	*p)	/*!< in: InnoDB handlerton */
osku's avatar
osku committed
2126
{
2127
	static char	current_dir[3];		/*!< Set if using current lib */
osku's avatar
osku committed
2128 2129
	int		err;
	bool		ret;
2130
	char		*default_path;
2131
	uint		format_id;
osku's avatar
osku committed
2132

2133
	DBUG_ENTER("innobase_init");
2134
        handlerton *innobase_hton= (handlerton *)p;
2135
        innodb_hton_ptr = innobase_hton;
2136

2137
        innobase_hton->state = SHOW_OPTION_YES;
2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160
        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;
2161
	innobase_hton->alter_table_flags = innobase_alter_table_flags;
2162

osku's avatar
osku committed
2163 2164
	ut_a(DATA_MYSQL_TRUE_VARCHAR == (ulint)MYSQL_TYPE_VARCHAR);

2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182
#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 */

2183 2184
	/* Check that values don't overflow on 32-bit systems. */
	if (sizeof(ulint) == 4) {
2185
		if (innobase_buffer_pool_size > UINT_MAX32) {
2186 2187 2188 2189
			sql_print_error(
				"innobase_buffer_pool_size can't be over 4GB"
				" on 32-bit systems");

2190
			goto error;
2191 2192 2193 2194 2195 2196 2197
		}

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

2198
			goto error;
2199 2200 2201
		}
	}

2202
	os_innodb_umask = (ulint)my_umask;
osku's avatar
osku committed
2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213

	/* 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 {
2214 2215 2216 2217 2218
		/* 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;
osku's avatar
osku committed
2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233
	}

	ut_a(default_path);

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

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

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

	srv_data_home = (innobase_data_home_dir ? innobase_data_home_dir :
			 default_path);

	/* Set default InnoDB data file size to 10 MB and let it be
2234
	auto-extending. Thus users can use InnoDB in >= 4.0 without having
osku's avatar
osku committed
2235 2236 2237
	to specify any startup options. */

	if (!innobase_data_file_path) {
2238
		innobase_data_file_path = (char*) "ibdata1:10M:autoextend";
osku's avatar
osku committed
2239 2240 2241 2242 2243 2244 2245 2246 2247
	}

	/* 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(
2248
		internal_innobase_data_file_path);
osku's avatar
osku committed
2249
	if (ret == FALSE) {
2250
		sql_print_error(
osku's avatar
osku committed
2251
			"InnoDB: syntax error in innodb_data_file_path");
2252 2253
mem_free_and_error:
		srv_free_paths_and_sizes();
2254
		my_free(internal_innobase_data_file_path);
2255
		goto error;
osku's avatar
osku committed
2256 2257 2258 2259 2260
	}

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

	/* The default dir for log files is the datadir of MySQL */
2261

osku's avatar
osku committed
2262
	if (!innobase_log_group_home_dir) {
2263
		innobase_log_group_home_dir = default_path;
osku's avatar
osku committed
2264 2265
	}

2266
#ifdef UNIV_LOG_ARCHIVE
osku's avatar
osku committed
2267 2268 2269 2270 2271 2272 2273 2274 2275 2276
	/* 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)
2277
		srv_parse_log_group_home_dirs(innobase_log_group_home_dir);
osku's avatar
osku committed
2278 2279 2280 2281 2282

	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");

2283
		goto mem_free_and_error;
osku's avatar
osku committed
2284 2285
	}

2286 2287 2288 2289 2290 2291 2292 2293 2294 2295
	/* Validate the file format by animal name */
	if (innobase_file_format_name != NULL) {

		format_id = innobase_file_format_name_lookup(
			innobase_file_format_name);

		if (format_id > DICT_TF_FORMAT_MAX) {

			sql_print_error("InnoDB: wrong innodb_file_format.");

2296
			goto mem_free_and_error;
2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310
		}
	} else {
		/* Set it to the default file format id. Though this
		should never happen. */
		format_id = 0;
	}

	srv_file_format = format_id;

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

2311
	innobase_file_format_name =
2312 2313
		(char*) trx_sys_file_format_id_to_name(format_id);

2314 2315
	/* Check innobase_file_format_check variable */
	if (!innobase_file_format_check) {
2316

2317 2318
		/* Set the value to disable checking. */
		srv_max_file_format_at_startup = DICT_TF_FORMAT_MAX + 1;
2319

2320
	} else {
2321

2322 2323 2324
		/* Set the value to the lowest supported format. */
		srv_max_file_format_at_startup = DICT_TF_FORMAT_MIN;
	}
2325

2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339
	/* Did the user specify a format name that we support?
	As a side effect it will update the variable
	srv_max_file_format_at_startup */
	if (innobase_file_format_validate_and_set(
			innobase_file_format_max) < 0) {

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

		goto mem_free_and_error;
2340 2341
	}

2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356
	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 "
2357
				"innodb_change_buffering=%s",
2358 2359 2360 2361 2362
				innobase_change_buffering);
		goto mem_free_and_error;
	}

innobase_change_buffering_inited_ok:
2363 2364 2365 2366
	ut_a((ulint) ibuf_use < UT_ARR_SIZE(innobase_change_buffering_values));
	innobase_change_buffering = (char*)
		innobase_change_buffering_values[ibuf_use];

osku's avatar
osku committed
2367 2368
	/* --------------------------------------------------*/

2369
	srv_file_flush_method_str = innobase_file_flush_method;
osku's avatar
osku committed
2370 2371 2372 2373 2374 2375 2376 2377 2378 2379

	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;

2380
	srv_buf_pool_size = (ulint) innobase_buffer_pool_size;
irana's avatar
irana committed
2381
	srv_buf_pool_instances = (ulint) innobase_buffer_pool_instances;
2382

osku's avatar
osku committed
2383 2384 2385
	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;

	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
2386 2387
	srv_n_read_io_threads = (ulint) innobase_read_io_threads;
	srv_n_write_io_threads = (ulint) innobase_write_io_threads;
osku's avatar
osku committed
2388 2389 2390 2391 2392 2393

	srv_force_recovery = (ulint) innobase_force_recovery;

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

2394 2395 2396 2397
#ifdef HAVE_LARGE_PAGES
        if ((os_use_large_pages = (ibool) my_use_large_pages))
		os_large_page_size = (ulint) opt_large_page_size;
#endif
2398

2399 2400
	row_rollback_on_timeout = (ibool) innobase_rollback_on_timeout;

2401
	srv_locks_unsafe_for_binlog = (ibool) innobase_locks_unsafe_for_binlog;
osku's avatar
osku committed
2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414

	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);
2415
	ut_a(DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number);
osku's avatar
osku committed
2416 2417 2418 2419 2420 2421

	/* 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. */

2422 2423
	ut_a(0 == strcmp(my_charset_latin1.name, "latin1_swedish_ci"));
	srv_latin1_ordering = my_charset_latin1.sort_order;
osku's avatar
osku committed
2424

2425 2426
	innobase_commit_concurrency_init_default();

2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465
#ifdef HAVE_PSI_INTERFACE
	/* Register keys with MySQL performance schema */
	if (PSI_server) {
		int	count;

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

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

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

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

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

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

osku's avatar
osku committed
2466
	/* Since we in this module access directly the fields of a trx
2467
	struct, and due to different headers and flags it might happen that
osku's avatar
osku committed
2468 2469 2470 2471 2472 2473 2474
	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) {
2475
		goto mem_free_and_error;
osku's avatar
osku committed
2476 2477
	}

irana's avatar
irana committed
2478 2479 2480
	innobase_old_blocks_pct = buf_LRU_old_ratio_update(
		innobase_old_blocks_pct, TRUE);

2481
	innobase_open_tables = hash_create(200);
2482 2483 2484 2485 2486 2487 2488 2489 2490 2491
	mysql_mutex_init(innobase_share_mutex_key,
			 &innobase_share_mutex,
			 MY_MUTEX_INIT_FAST);
	mysql_mutex_init(prepare_commit_mutex_key,
			 &prepare_commit_mutex, MY_MUTEX_INIT_FAST);
	mysql_mutex_init(commit_threads_m_key,
			 &commit_threads_m, MY_MUTEX_INIT_FAST);
	mysql_mutex_init(commit_cond_mutex_key,
			 &commit_cond_m, MY_MUTEX_INIT_FAST);
	mysql_cond_init(commit_cond_key, &commit_cond, NULL);
osku's avatar
osku committed
2492
	innodb_inited= 1;
2493 2494 2495 2496 2497 2498
#ifdef MYSQL_DYNAMIC_PLUGIN
	if (innobase_hton != p) {
		innobase_hton = reinterpret_cast<handlerton*>(p);
		*innobase_hton = *innodb_hton_ptr;
	}
#endif /* MYSQL_DYNAMIC_PLUGIN */
osku's avatar
osku committed
2499

2500
	/* Get the current high water mark format. */
2501
	innobase_file_format_max = (char*) trx_sys_file_format_max_get();
2502

2503
	btr_search_fully_disabled = (!btr_search_enabled);
osku's avatar
osku committed
2504 2505
	DBUG_RETURN(FALSE);
error:
2506
	DBUG_RETURN(TRUE);
osku's avatar
osku committed
2507 2508
}

2509
/*******************************************************************//**
2510 2511
Closes an InnoDB database.
@return	TRUE if error */
2512
static
osku's avatar
osku committed
2513
int
2514 2515
innobase_end(
/*=========*/
2516
	handlerton*		hton,	/*!< in/out: InnoDB handlerton */
2517
	ha_panic_function	type __attribute__((unused)))
2518
					/*!< in: ha_panic() parameter */
osku's avatar
osku committed
2519 2520 2521 2522
{
	int	err= 0;

	DBUG_ENTER("innobase_end");
2523
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
2524 2525 2526

	if (innodb_inited) {

2527 2528
		srv_fast_shutdown = (ulint) innobase_fast_shutdown;
		innodb_inited = 0;
2529 2530
		hash_table_free(innobase_open_tables);
		innobase_open_tables = NULL;
2531 2532
		if (innobase_shutdown_for_mysql() != DB_SUCCESS) {
			err = 1;
osku's avatar
osku committed
2533
		}
2534
		srv_free_paths_and_sizes();
2535
		my_free(internal_innobase_data_file_path);
2536 2537 2538 2539 2540
		mysql_mutex_destroy(&innobase_share_mutex);
		mysql_mutex_destroy(&prepare_commit_mutex);
		mysql_mutex_destroy(&commit_threads_m);
		mysql_mutex_destroy(&commit_cond_m);
		mysql_cond_destroy(&commit_cond);
osku's avatar
osku committed
2541 2542
	}

2543
	DBUG_RETURN(err);
osku's avatar
osku committed
2544 2545
}

2546
/****************************************************************//**
osku's avatar
osku committed
2547
Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
2548 2549
the logs, and the name of this function should be innobase_checkpoint.
@return	TRUE if error */
2550
static
osku's avatar
osku committed
2551
bool
2552 2553
innobase_flush_logs(
/*================*/
2554
	handlerton*	hton)	/*!< in/out: InnoDB handlerton */
osku's avatar
osku committed
2555
{
2556
	bool	result = 0;
osku's avatar
osku committed
2557

2558
	DBUG_ENTER("innobase_flush_logs");
2559
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
2560 2561 2562

	log_buffer_flush_to_disk();

2563
	DBUG_RETURN(result);
osku's avatar
osku committed
2564 2565
}

2566
/****************************************************************//**
2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580
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);
}

2581
/*****************************************************************//**
osku's avatar
osku committed
2582
Commits a transaction in an InnoDB database. */
2583
static
osku's avatar
osku committed
2584 2585 2586
void
innobase_commit_low(
/*================*/
2587
	trx_t*	trx)	/*!< in: transaction handle */
osku's avatar
osku committed
2588
{
2589
	if (trx_is_started(trx)) {
osku's avatar
osku committed
2590

2591
		trx_commit_for_mysql(trx);
2592
	}
osku's avatar
osku committed
2593 2594
}

2595
/*****************************************************************//**
osku's avatar
osku committed
2596 2597 2598
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
2599 2600
have one.
@return	0 */
2601
static
osku's avatar
osku committed
2602 2603 2604
int
innobase_start_trx_and_assign_read_view(
/*====================================*/
2605
        handlerton *hton, /*!< in: Innodb handlerton */
2606
	THD*	thd)	/*!< in: MySQL thread handle of the user for whom
osku's avatar
osku committed
2607 2608 2609 2610
			the transaction should be committed */
{
	trx_t*	trx;

2611
	DBUG_ENTER("innobase_start_trx_and_assign_read_view");
2612
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
2613 2614 2615

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

2616
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2617 2618 2619 2620 2621 2622 2623 2624 2625

	/* 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 */

2626
	trx_start_if_not_started(trx);
osku's avatar
osku committed
2627 2628 2629 2630 2631 2632 2633

	/* 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 */

2634
	innobase_register_trx(hton, current_thd, trx);
osku's avatar
osku committed
2635 2636 2637 2638

	DBUG_RETURN(0);
}

2639
/*****************************************************************//**
osku's avatar
osku committed
2640
Commits a transaction in an InnoDB database or marks an SQL statement
2641 2642
ended.
@return	0 */
osku's avatar
osku committed
2643 2644 2645 2646
static
int
innobase_commit(
/*============*/
2647
        handlerton *hton, /*!< in: Innodb handlerton */
2648
	THD* 	thd,	/*!< in: MySQL thread handle of the user for whom
osku's avatar
osku committed
2649
			the transaction should be committed */
2650
	bool	all)	/*!< in:	TRUE - commit transaction
2651
				FALSE - the current SQL statement ended */
osku's avatar
osku committed
2652 2653 2654
{
	trx_t*		trx;

2655
	DBUG_ENTER("innobase_commit");
2656
	DBUG_ASSERT(hton == innodb_hton_ptr);
2657
	DBUG_PRINT("trans", ("ending transaction"));
osku's avatar
osku committed
2658

2659
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2660

2661 2662
	/* Since we will reserve the kernel mutex, we have to release
	the search system latch first to obey the latching order. */
osku's avatar
osku committed
2663

2664
	if (trx->has_search_latch) {
2665
		trx_search_latch_release_if_reserved(trx);
2666 2667
	}

2668 2669 2670 2671
	/* Transaction is deregistered only in a commit or a rollback. If
	it is deregistered we know there cannot be resources to be freed
	and we could return immediately.  For the time being, we play safe
	and do the cleanup though there should be nothing to clean up. */
osku's avatar
osku committed
2672

2673
	if (!trx_is_registered_for_2pc(trx) && trx_is_started(trx)) {
osku's avatar
osku committed
2674

2675 2676
		sql_print_error("Transaction not registered for MySQL 2PC, "
				"but transaction is active");
osku's avatar
osku committed
2677
	}
2678

2679
	if (all
2680
	    || (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
2681 2682

		/* We were instructed to commit the whole transaction, or
osku's avatar
osku committed
2683 2684
		this is an SQL statement end and autocommit is on */

2685 2686 2687
		/* We need current binlog position for ibbackup to work.
		Note, the position is current because of
		prepare_commit_mutex */
osku's avatar
osku committed
2688
retry:
2689
		if (innobase_commit_concurrency > 0) {
2690
			mysql_mutex_lock(&commit_cond_m);
2691 2692
			commit_threads++;

2693
			if (commit_threads > innobase_commit_concurrency) {
2694
				commit_threads--;
2695
				mysql_cond_wait(&commit_cond,
2696
					&commit_cond_m);
2697
				mysql_mutex_unlock(&commit_cond_m);
2698 2699 2700
				goto retry;
			}
			else {
2701
				mysql_mutex_unlock(&commit_cond_m);
2702 2703 2704
			}
		}

2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717
		/* 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. */
2718
		trx->mysql_log_file_name = mysql_bin_log_file_name();
2719
		trx->mysql_log_offset = (ib_int64_t) mysql_bin_log_file_pos();
osku's avatar
osku committed
2720

inaam's avatar
inaam committed
2721 2722 2723 2724
		/* 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;
osku's avatar
osku committed
2725
		innobase_commit_low(trx);
inaam's avatar
inaam committed
2726
		trx->flush_log_later = FALSE;
osku's avatar
osku committed
2727

2728
		if (innobase_commit_concurrency > 0) {
2729
			mysql_mutex_lock(&commit_cond_m);
2730
			commit_threads--;
2731 2732
			mysql_cond_signal(&commit_cond);
			mysql_mutex_unlock(&commit_cond_m);
2733 2734
		}

2735 2736
		if (trx_has_prepare_commit_mutex(trx)) {
  
2737
			mysql_mutex_unlock(&prepare_commit_mutex);
2738 2739 2740
  		}
  
		trx_deregister_from_2pc(trx);
2741

inaam's avatar
inaam committed
2742 2743
		/* Now do a write + flush of logs. */
		trx_commit_complete_for_mysql(trx);
osku's avatar
osku committed
2744
	} else {
2745
		/* We just mark the SQL statement ended and do not do a
osku's avatar
osku committed
2746 2747
		transaction commit */

2748 2749 2750 2751
		/* 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);
2752

osku's avatar
osku committed
2753 2754 2755 2756 2757 2758 2759
		/* 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);
	}

2760 2761
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

2762
	if (trx->declared_to_be_inside_innodb) {
2763
		/* Release our possible ticket in the FIFO */
osku's avatar
osku committed
2764

2765
		srv_conc_force_exit_innodb(trx);
2766
	}
2767 2768 2769

	/* Tell the InnoDB server that there might be work for utility
	threads: */
osku's avatar
osku committed
2770 2771 2772 2773 2774
	srv_active_wake_master_thread();

	DBUG_RETURN(0);
}

2775
/*****************************************************************//**
2776 2777
Rolls back a transaction or the latest SQL statement.
@return	0 or error number */
2778 2779
static
int
osku's avatar
osku committed
2780 2781
innobase_rollback(
/*==============*/
2782 2783
        handlerton *hton, /*!< in: Innodb handlerton */ 
	THD*	thd,	/*!< in: handle to the MySQL thread of the user
osku's avatar
osku committed
2784
			whose transaction should be rolled back */
2785
	bool	all)	/*!< in:	TRUE - commit transaction
2786
				FALSE - the current SQL statement ended */
osku's avatar
osku committed
2787 2788 2789 2790 2791
{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_rollback");
2792
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
2793 2794
	DBUG_PRINT("trans", ("aborting transaction"));

2795
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2796 2797 2798 2799 2800 2801 2802

	/* 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);

2803 2804
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

2805 2806 2807
	/* 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 */
2808

2809
	row_unlock_table_autoinc_for_mysql(trx);
osku's avatar
osku committed
2810

2811
	if (all
2812
	    || !thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
2813 2814

		error = trx_rollback_for_mysql(trx);
2815
		trx_deregister_from_2pc(trx);
osku's avatar
osku committed
2816 2817 2818 2819
	} else {
		error = trx_rollback_last_sql_stat_for_mysql(trx);
	}

2820
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
osku's avatar
osku committed
2821 2822
}

2823
/*****************************************************************//**
2824 2825
Rolls back a transaction
@return	0 or error number */
2826
static
osku's avatar
osku committed
2827 2828 2829
int
innobase_rollback_trx(
/*==================*/
2830
	trx_t*	trx)	/*!< in: transaction */
osku's avatar
osku committed
2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842
{
	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);

2843 2844 2845
	/* 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 */
2846

2847
	row_unlock_table_autoinc_for_mysql(trx);
osku's avatar
osku committed
2848 2849 2850

	error = trx_rollback_for_mysql(trx);

2851
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
osku's avatar
osku committed
2852 2853
}

2854
/*****************************************************************//**
2855
Rolls back a transaction to a savepoint.
2856 2857
@return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the
given name */
2858 2859
static
int
osku's avatar
osku committed
2860 2861
innobase_rollback_to_savepoint(
/*===========================*/
2862 2863
        handlerton *hton,       /*!< in: Innodb handlerton */ 
	THD*	thd,		/*!< in: handle to the MySQL thread of the user
osku's avatar
osku committed
2864
				whose transaction should be rolled back */
2865
	void*	savepoint)	/*!< in: savepoint data */
osku's avatar
osku committed
2866
{
2867
	ib_int64_t	mysql_binlog_cache_pos;
2868 2869 2870
	int		error = 0;
	trx_t*		trx;
	char		name[64];
osku's avatar
osku committed
2871 2872

	DBUG_ENTER("innobase_rollback_to_savepoint");
2873
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
2874

2875
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2876 2877 2878 2879 2880 2881 2882

	/* 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);

2883
	/* TODO: use provided savepoint data area to store savepoint data */
osku's avatar
osku committed
2884

2885
	longlong2str((ulint)savepoint, name, 36);
osku's avatar
osku committed
2886

2887
	error = (int) trx_rollback_to_savepoint_for_mysql(trx, name,
osku's avatar
osku committed
2888
						&mysql_binlog_cache_pos);
2889
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
osku's avatar
osku committed
2890 2891
}

2892
/*****************************************************************//**
2893
Release transaction savepoint name.
2894 2895
@return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the
given name */
osku's avatar
osku committed
2896 2897 2898 2899
static
int
innobase_release_savepoint(
/*=======================*/
2900 2901
        handlerton*	hton,	/*!< in: handlerton for Innodb */
	THD*	thd,		/*!< in: handle to the MySQL thread of the user
osku's avatar
osku committed
2902
				whose transaction should be rolled back */
2903
	void*	savepoint)	/*!< in: savepoint data */
osku's avatar
osku committed
2904
{
2905 2906 2907
	int		error = 0;
	trx_t*		trx;
	char		name[64];
osku's avatar
osku committed
2908 2909

	DBUG_ENTER("innobase_release_savepoint");
2910
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
2911

2912
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2913

2914
	/* TODO: use provided savepoint data area to store savepoint data */
osku's avatar
osku committed
2915

2916
	longlong2str((ulint)savepoint, name, 36);
osku's avatar
osku committed
2917 2918 2919

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

2920
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
osku's avatar
osku committed
2921 2922
}

2923
/*****************************************************************//**
2924 2925
Sets a transaction savepoint.
@return	always 0, that is, always succeeds */
osku's avatar
osku committed
2926 2927 2928 2929
static
int
innobase_savepoint(
/*===============*/
2930 2931 2932
	handlerton*	hton,   /*!< in: handle to the Innodb handlerton */
	THD*	thd,		/*!< in: handle to the MySQL thread */
	void*	savepoint)	/*!< in: savepoint data */
osku's avatar
osku committed
2933 2934 2935 2936 2937
{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_savepoint");
2938
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
2939

2940 2941 2942 2943 2944
	/*
	  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.
	*/
2945 2946
#ifdef MYSQL_SERVER /* plugins cannot access thd->in_sub_stmt */
	DBUG_ASSERT(thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) ||
2947
		thd->in_sub_stmt);
2948
#endif /* MYSQL_SERVER */
osku's avatar
osku committed
2949

2950
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2951 2952 2953 2954 2955 2956 2957

	/* 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);

2958 2959
	/* Cannot happen outside of transaction */
	DBUG_ASSERT(trx_is_registered_for_2pc(trx));
osku's avatar
osku committed
2960

2961 2962 2963
	/* TODO: use provided savepoint data area to store savepoint data */
	char name[64];
	longlong2str((ulint)savepoint,name,36);
osku's avatar
osku committed
2964

2965
	error = (int) trx_savepoint_for_mysql(trx, name, (ib_int64_t)0);
osku's avatar
osku committed
2966

2967
	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
osku's avatar
osku committed
2968 2969
}

2970
/*****************************************************************//**
2971 2972
Frees a possible InnoDB trx object associated with the current THD.
@return	0 or error number */
osku's avatar
osku committed
2973 2974 2975 2976
static
int
innobase_close_connection(
/*======================*/
2977 2978
        handlerton*	hton,	/*!< in:  innobase handlerton */
	THD*	thd)	/*!< in: handle to the MySQL thread of the user
osku's avatar
osku committed
2979 2980 2981 2982
			whose resources should be free'd */
{
	trx_t*	trx;

2983 2984 2985
	DBUG_ENTER("innobase_close_connection");
	DBUG_ASSERT(hton == innodb_hton_ptr);
	trx = thd_to_trx(thd);
osku's avatar
osku committed
2986 2987 2988

	ut_a(trx);

2989
	if (!trx_is_registered_for_2pc(trx) && trx_is_started(trx)) {
2990

2991 2992
		sql_print_error("Transaction not registered for MySQL 2PC, "
				"but transaction is active");
osku's avatar
osku committed
2993 2994 2995
	}


2996 2997
	if (trx_is_started(trx) && global_system_variables.log_warnings) {

2998 2999
		sql_print_warning(
			"MySQL is closing a connection that has an active "
3000
			"InnoDB transaction.  %llu row modifications will "
3001
			"roll back.",
3002
			(ullint) trx->undo_no);
3003
	}
osku's avatar
osku committed
3004 3005 3006

	innobase_rollback_trx(trx);

3007
	thr_local_free(trx->mysql_thread_id);
3008
	trx_free_for_mysql(trx);
osku's avatar
osku committed
3009

3010
	DBUG_RETURN(0);
osku's avatar
osku committed
3011 3012 3013
}


3014
/*************************************************************************//**
osku's avatar
osku committed
3015 3016 3017
** InnoDB database tables
*****************************************************************************/

3018
/****************************************************************//**
3019
Get the record format from the data dictionary.
3020 3021
@return one of ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT,
ROW_TYPE_COMPRESSED, ROW_TYPE_DYNAMIC */
3022
UNIV_INTERN
osku's avatar
osku committed
3023 3024 3025 3026 3027
enum row_type
ha_innobase::get_row_type() const
/*=============================*/
{
	if (prebuilt && prebuilt->table) {
3028 3029 3030
		const ulint	flags = prebuilt->table->flags;

		if (UNIV_UNLIKELY(!flags)) {
osku's avatar
osku committed
3031 3032
			return(ROW_TYPE_REDUNDANT);
		}
3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048

		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
		}
osku's avatar
osku committed
3049 3050 3051 3052 3053
	}
	ut_ad(0);
	return(ROW_TYPE_NOT_USED);
}

3054 3055


3056
/****************************************************************//**
3057 3058
Get the table flags to use for the statement.
@return	table flags */
3059
UNIV_INTERN
3060 3061
handler::Table_flags
ha_innobase::table_flags() const
3062
/*============================*/
3063 3064 3065
{
       /* Need to use tx_isolation here since table flags is (also)
          called before prebuilt is inited. */
3066
        ulong const tx_isolation = thd_tx_isolation(ha_thd());
3067 3068 3069 3070 3071
        if (tx_isolation <= ISO_READ_COMMITTED)
                return int_table_flags;
        return int_table_flags | HA_BINLOG_STMT_CAPABLE;
}

3072
/****************************************************************//**
osku's avatar
osku committed
3073 3074 3075 3076 3077 3078
Gives the file extension of an InnoDB single-table tablespace. */
static const char* ha_innobase_exts[] = {
  ".ibd",
  NullS
};

3079
/****************************************************************//**
3080 3081
Returns the table type (storage engine name).
@return	table type */
3082 3083 3084 3085 3086 3087 3088 3089
UNIV_INTERN
const char*
ha_innobase::table_type() const
/*===========================*/
{
	return(innobase_hton_name);
}

3090
/****************************************************************//**
3091
Returns the index type. */
3092 3093
UNIV_INTERN
const char*
3094 3095 3096
ha_innobase::index_type(
/*====================*/
	uint)
3097
				/*!< out: index type */
3098 3099 3100 3101
{
	return("BTREE");
}

3102
/****************************************************************//**
3103 3104
Returns the table file name extension.
@return	file extension string */
3105
UNIV_INTERN
osku's avatar
osku committed
3106 3107 3108 3109
const char**
ha_innobase::bas_ext() const
/*========================*/
{
3110
	return(ha_innobase_exts);
osku's avatar
osku committed
3111 3112
}

3113
/****************************************************************//**
3114 3115
Returns the operations supported for indexes.
@return	flags of supported operations */
3116 3117
UNIV_INTERN
ulong
3118 3119 3120 3121 3122 3123
ha_innobase::index_flags(
/*=====================*/
	uint,
	uint,
	bool)
const
3124 3125 3126 3127 3128
{
	return(HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER
	       | HA_READ_RANGE | HA_KEYREAD_ONLY);
}

3129
/****************************************************************//**
3130 3131
Returns the maximum number of keys.
@return	MAX_KEY */
3132 3133 3134
UNIV_INTERN
uint
ha_innobase::max_supported_keys() const
3135
/*===================================*/
3136 3137 3138 3139
{
	return(MAX_KEY);
}

3140
/****************************************************************//**
3141 3142
Returns the maximum key length.
@return	maximum supported key length, in bytes */
3143 3144 3145
UNIV_INTERN
uint
ha_innobase::max_supported_key_length() const
3146
/*=========================================*/
3147 3148 3149 3150 3151 3152 3153 3154 3155
{
	/* 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);
}

3156
/****************************************************************//**
3157 3158
Returns the key map of keys that are usable for scanning.
@return	key_map_full */
3159 3160 3161 3162 3163 3164 3165
UNIV_INTERN
const key_map*
ha_innobase::keys_to_use_for_scanning()
{
	return(&key_map_full);
}

3166
/****************************************************************//**
3167 3168
Determines if table caching is supported.
@return	HA_CACHE_TBL_ASKTRANSACT */
3169 3170 3171 3172 3173 3174 3175
UNIV_INTERN
uint8
ha_innobase::table_cache_type()
{
	return(HA_CACHE_TBL_ASKTRANSACT);
}

3176
/****************************************************************//**
3177 3178
Determines if the primary key is clustered index.
@return	true */
3179 3180 3181 3182 3183 3184
UNIV_INTERN
bool
ha_innobase::primary_key_is_clustered()
{
	return(true);
}
osku's avatar
osku committed
3185

3186
/*****************************************************************//**
osku's avatar
osku committed
3187 3188 3189 3190 3191 3192 3193 3194
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(
/*=================*/
3195
	char*		norm_name,	/*!< out: normalized name as a
osku's avatar
osku committed
3196
					null-terminated string */
3197
	const char*	name)		/*!< in: table name string */
osku's avatar
osku committed
3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231
{
	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
}

3232
/********************************************************************//**
3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293
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);
}

3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389
/*******************************************************************//**
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");

irana's avatar
irana committed
3390 3391
	mutex_enter(&dict_sys->mutex);

3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421
	mysql_num_index = table->s->keys;
	ib_num_index = UT_LIST_GET_LEN(ib_table->indexes);

	index_mapping = share->idx_trans_tbl.index_mapping;

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

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

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

		if (!index_mapping) {
irana's avatar
irana committed
3422 3423 3424 3425 3426 3427 3428
			/* Report an error if index_mapping continues to be
			NULL and mysql_num_index is a non-zero value */
			sql_print_error("InnoDB: fail to allocate memory for "
					"index translation table. Number of "
					"Index:%lu, array size:%lu",
					mysql_num_index,
					share->idx_trans_tbl.array_size);
3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471
			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. */
3472
		my_free(index_mapping);
3473 3474 3475 3476 3477 3478 3479 3480

		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;

irana's avatar
irana committed
3481 3482
	mutex_exit(&dict_sys->mutex);

3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511
	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]);
}

3512
/************************************************************************
3513
Set the autoinc column max value. This should only be called once from
3514
ha_innobase::open(). Therefore there's no need for a covering lock. */
3515
UNIV_INTERN
3516
void
3517 3518 3519 3520
ha_innobase::innobase_initialize_autoinc()
/*======================================*/
{
	ulonglong	auto_inc;
3521
	const Field*	field = table->found_next_number_field;
3522

3523 3524 3525 3526
	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
3527 3528 3529
		autoinc column. We set it to the 0, effectively disabling
		updates to the table. */
		auto_inc = 0;
3530 3531

		ut_print_timestamp(stderr);
3532 3533 3534
		fprintf(stderr, "  InnoDB: Unable to determine the AUTOINC "
				"column name\n");
	}
3535

3536 3537
	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {
		/* If the recovery level is set so high that writes
3538
		are disabled we force the AUTOINC counter to 0
3539 3540 3541 3542 3543 3544 3545 3546
		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. */
3547
		auto_inc = 0;
3548
	} else if (field == NULL) {
3549 3550
		/* This is a far more serious error, best to avoid
		opening the table and return failure. */
3551 3552 3553 3554 3555 3556 3557 3558
		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());
3559 3560 3561

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

3562 3563 3564 3565 3566 3567 3568
		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) {
3569 3570 3571 3572 3573
		case DB_SUCCESS: {
			ulonglong	col_max_value;

			col_max_value = innobase_get_int_col_max_value(field);

3574
			/* At the this stage we do not know the increment
3575
			nor the offset, so use a default increment of 1. */
3576

3577 3578
			auto_inc = innobase_next_autoinc(
				read_auto_inc, 1, 1, col_max_value);
3579

3580 3581
			break;
		}
3582 3583 3584 3585 3586 3587 3588
		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 "
3589
				"value to 0,\n"
3590 3591 3592 3593 3594 3595 3596 3597
				"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);

3598 3599 3600 3601 3602 3603 3604
			/* 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;
3605 3606 3607 3608 3609 3610
			break;
		default:
			/* row_search_max_autoinc() should only return
			one of DB_SUCCESS or DB_RECORD_NOT_FOUND. */
			ut_error;
		}
3611 3612
	}

3613
	dict_table_autoinc_initialize(prebuilt->table, auto_inc);
3614 3615
}

3616
/*****************************************************************//**
osku's avatar
osku committed
3617
Creates and opens a handle to a table which already exists in an InnoDB
3618 3619
database.
@return	1 if error, 0 if success */
3620
UNIV_INTERN
osku's avatar
osku committed
3621 3622 3623
int
ha_innobase::open(
/*==============*/
3624 3625 3626
	const char*	name,		/*!< in: table name */
	int		mode,		/*!< in: not used */
	uint		test_if_locked)	/*!< in: not used */
osku's avatar
osku committed
3627 3628
{
	dict_table_t*	ib_table;
3629
	char		norm_name[1000];
osku's avatar
osku committed
3630
	THD*		thd;
3631 3632
	ulint		retries = 0;
	char*		is_part = NULL;
osku's avatar
osku committed
3633 3634 3635 3636 3637 3638

	DBUG_ENTER("ha_innobase::open");

	UT_NOT_USED(mode);
	UT_NOT_USED(test_if_locked);

3639
	thd = ha_thd();
3640 3641 3642 3643 3644 3645 3646 3647

	/* 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);
	}

osku's avatar
osku committed
3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664
	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;
3665
	if (!(uchar*) my_multi_malloc(MYF(MY_WME),
3666 3667 3668 3669
			&upd_buff, upd_and_key_val_buff_len,
			&key_val_buff, upd_and_key_val_buff_len,
			NullS)) {
		free_share(share);
osku's avatar
osku committed
3670

3671 3672
		DBUG_RETURN(1);
	}
osku's avatar
osku committed
3673

3674 3675 3676 3677 3678 3679 3680
	/* 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:
osku's avatar
osku committed
3681
	/* Get pointer to a table object in InnoDB dictionary cache */
3682
	ib_table = dict_table_get(norm_name, TRUE);
3683
	
3684
	if (NULL == ib_table) {
3685 3686 3687 3688 3689 3690 3691 3692
		if (is_part && retries < 10) {
			++retries;
			os_thread_sleep(100000);
			goto retry;
		}

		if (is_part) {
			sql_print_error("Failed to open table %s after "
3693
					"%lu attempts.\n", norm_name,
3694 3695 3696
					retries);
		}

3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708
		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"
3709
				"See " REFMAN "innodb-troubleshooting.html\n"
osku's avatar
osku committed
3710 3711
				"how you can resolve the problem.\n",
				norm_name);
3712
		free_share(share);
3713
		my_free(upd_buff);
3714
		my_errno = ENOENT;
osku's avatar
osku committed
3715

3716 3717
		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
osku's avatar
osku committed
3718

3719
	if (ib_table->ibd_file_missing && !thd_tablespace_op(thd)) {
osku's avatar
osku committed
3720 3721 3722 3723 3724
		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"
3725
				"See " REFMAN "innodb-troubleshooting.html\n"
osku's avatar
osku committed
3726 3727
				"how you can resolve the problem.\n",
				norm_name);
3728
		free_share(share);
3729
		my_free(upd_buff);
3730
		my_errno = ENOENT;
osku's avatar
osku committed
3731

3732
		dict_table_decrement_handle_count(ib_table, FALSE);
3733 3734
		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
osku's avatar
osku committed
3735

3736
	prebuilt = row_create_prebuilt(ib_table);
osku's avatar
osku committed
3737

3738
	prebuilt->mysql_row_len = table->s->reclength;
3739 3740
	prebuilt->default_rec = table->s->default_values;
	ut_ad(prebuilt->default_rec);
osku's avatar
osku committed
3741 3742 3743

	/* Looks like MySQL-3.23 sometimes has primary key number != 0 */

3744
	primary_key = table->s->primary_key;
osku's avatar
osku committed
3745 3746
	key_used_on_scan = primary_key;

3747 3748 3749 3750 3751
	if (!innobase_build_index_translation(table, ib_table, share)) {
		  sql_print_error("Build InnoDB index translation table for"
				  " Table %s failed", name);
	}

osku's avatar
osku committed
3752 3753
	/* Allocate a buffer for a 'row reference'. A row reference is
	a string of bytes of length ref_length which uniquely specifies
3754 3755 3756
	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! */
osku's avatar
osku committed
3757

3758
	if (!row_table_got_default_clust_index(ib_table)) {
osku's avatar
osku committed
3759

3760 3761
		prebuilt->clust_index_was_generated = FALSE;

3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812
		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. */
3813

3814 3815
			ref_length = table->key_info[primary_key].key_length;
		}
osku's avatar
osku committed
3816
	} else {
3817
		if (primary_key != MAX_KEY) {
3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838
			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);
osku's avatar
osku committed
3839 3840
		}

3841
		prebuilt->clust_index_was_generated = TRUE;
osku's avatar
osku committed
3842

3843
		ref_length = DATA_ROW_ID_LEN;
osku's avatar
osku committed
3844 3845 3846 3847 3848 3849 3850 3851

		/* 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. */
3852

osku's avatar
osku committed
3853
		if (key_used_on_scan != MAX_KEY) {
3854 3855 3856 3857
			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);
osku's avatar
osku committed
3858 3859 3860
		}
	}

3861 3862
	/* Index block size in InnoDB: used by MySQL in query optimization */
	stats.block_size = 16 * 1024;
osku's avatar
osku committed
3863 3864 3865 3866

	/* Init table lock structure */
	thr_lock_data_init(&share->lock,&lock,(void*) 0);

3867 3868 3869 3870
	if (prebuilt->table) {
		/* We update the highest file format in the system table
		space, if this table has higher file format setting. */

3871
		trx_sys_file_format_max_upgrade(
3872
			(const char**) &innobase_file_format_max,
3873
			dict_table_get_format(prebuilt->table));
3874 3875
	}

3876 3877 3878 3879 3880 3881 3882 3883 3884 3885
	/* 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) {

3886
			innobase_initialize_autoinc();
3887 3888 3889 3890 3891
		}

		dict_table_autoinc_unlock(prebuilt->table);
	}

3892 3893
	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);

3894
	DBUG_RETURN(0);
osku's avatar
osku committed
3895 3896
}

3897
UNIV_INTERN
3898 3899 3900 3901 3902 3903
uint
ha_innobase::max_supported_key_part_length() const
{
	return(DICT_MAX_INDEX_COL_LEN - 1);
}

3904
/******************************************************************//**
3905 3906
Closes a handle to an InnoDB table.
@return	0 */
3907
UNIV_INTERN
osku's avatar
osku committed
3908 3909 3910 3911
int
ha_innobase::close(void)
/*====================*/
{
3912 3913
	THD*	thd;

3914
	DBUG_ENTER("ha_innobase::close");
osku's avatar
osku committed
3915

3916
	thd = ha_thd();
3917 3918 3919 3920
	if (thd != NULL) {
		innobase_release_temporary_latches(ht, thd);
	}

3921
	row_prebuilt_free(prebuilt, FALSE);
osku's avatar
osku committed
3922

3923
	my_free(upd_buff);
3924
	free_share(share);
osku's avatar
osku committed
3925 3926 3927 3928 3929 3930

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

	srv_active_wake_master_thread();

3931
	DBUG_RETURN(0);
osku's avatar
osku committed
3932 3933 3934 3935
}

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

3936
/**************************************************************//**
3937 3938
Gets field offset for a field in a table.
@return	offset */
3939
static inline
osku's avatar
osku committed
3940 3941 3942
uint
get_field_offset(
/*=============*/
3943 3944
	TABLE*	table,	/*!< in: MySQL table object */
	Field*	field)	/*!< in: MySQL field object */
osku's avatar
osku committed
3945
{
3946
	return((uint) (field->ptr - table->record[0]));
osku's avatar
osku committed
3947 3948
}

3949
/**************************************************************//**
osku's avatar
osku committed
3950
Checks if a field in a record is SQL NULL. Uses the record format
3951 3952
information in table to track the null bit in record.
@return	1 if NULL, 0 otherwise */
3953
static inline
osku's avatar
osku committed
3954 3955 3956
uint
field_in_record_is_null(
/*====================*/
3957 3958 3959
	TABLE*	table,	/*!< in: MySQL table object */
	Field*	field,	/*!< in: MySQL field object */
	char*	record)	/*!< in: a row in MySQL format */
osku's avatar
osku committed
3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978
{
	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);
}

3979
/**************************************************************//**
osku's avatar
osku committed
3980 3981
Sets a field in a record to SQL NULL. Uses the record format
information in table to track the null bit in record. */
3982
static inline
osku's avatar
osku committed
3983 3984 3985
void
set_field_in_record_to_null(
/*========================*/
3986 3987 3988
	TABLE*	table,	/*!< in: MySQL table object */
	Field*	field,	/*!< in: MySQL field object */
	char*	record)	/*!< in: a row in MySQL format */
osku's avatar
osku committed
3989 3990 3991 3992 3993 3994 3995 3996 3997
{
	int	null_offset;

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

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

3998
/*************************************************************//**
osku's avatar
osku committed
3999 4000 4001
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
4002 4003
function, remember to update the prototype there!
@return	1, 0, -1, if a is greater, equal, less than b, respectively */
4004
extern "C" UNIV_INTERN
osku's avatar
osku committed
4005 4006 4007
int
innobase_mysql_cmp(
/*===============*/
4008 4009 4010 4011
	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,
osku's avatar
osku committed
4012
					not UNIV_SQL_NULL */
4013 4014
	const unsigned char* b,		/*!< in: data field */
	unsigned int	b_length)	/*!< in: data field length,
osku's avatar
osku committed
4015 4016 4017 4018
					not UNIV_SQL_NULL */
{
	CHARSET_INFO*		charset;
	enum_field_types	mysql_tp;
4019
	int			ret;
osku's avatar
osku committed
4020 4021 4022 4023 4024 4025 4026 4027

	DBUG_ASSERT(a_length != UNIV_SQL_NULL);
	DBUG_ASSERT(b_length != UNIV_SQL_NULL);

	mysql_tp = (enum_field_types) mysql_type;

	switch (mysql_tp) {

4028
	case MYSQL_TYPE_BIT:
osku's avatar
osku committed
4029 4030
	case MYSQL_TYPE_STRING:
	case MYSQL_TYPE_VAR_STRING:
4031 4032 4033 4034
	case MYSQL_TYPE_TINY_BLOB:
	case MYSQL_TYPE_MEDIUM_BLOB:
	case MYSQL_TYPE_BLOB:
	case MYSQL_TYPE_LONG_BLOB:
4035
	case MYSQL_TYPE_VARCHAR:
osku's avatar
osku committed
4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056
		/* 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);
			}
		}

4057 4058 4059 4060
		/* 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! */
osku's avatar
osku committed
4061

4062 4063 4064
		ret = charset->coll->strnncollsp(charset,
				  a, a_length,
						 b, b_length, 0);
osku's avatar
osku committed
4065
		if (ret < 0) {
4066
			return(-1);
osku's avatar
osku committed
4067
		} else if (ret > 0) {
4068
			return(1);
osku's avatar
osku committed
4069
		} else {
4070 4071
			return(0);
		}
osku's avatar
osku committed
4072
	default:
4073
		ut_error;
osku's avatar
osku committed
4074 4075 4076 4077 4078
	}

	return(0);
}

4079
/**************************************************************//**
osku's avatar
osku committed
4080 4081
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
4082 4083
VARCHAR and the new true VARCHAR in >= 5.0.3 by the 'prtype'.
@return	DATA_BINARY, DATA_VARCHAR, ... */
4084
extern "C" UNIV_INTERN
osku's avatar
osku committed
4085 4086 4087
ulint
get_innobase_type_from_mysql_type(
/*==============================*/
4088
	ulint*		unsigned_flag,	/*!< out: DATA_UNSIGNED if an
4089 4090 4091 4092
					'unsigned type';
					at least ENUM and SET,
					and unsigned integer
					types are 'unsigned types' */
4093
	const void*	f)		/*!< in: MySQL Field */
osku's avatar
osku committed
4094
{
4095 4096
	const class Field* field = reinterpret_cast<const class Field*>(f);

osku's avatar
osku committed
4097 4098 4099 4100
	/* 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 */

4101 4102 4103 4104 4105
	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);
osku's avatar
osku committed
4106 4107 4108 4109 4110 4111 4112 4113

	if (field->flags & UNSIGNED_FLAG) {

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

4114 4115
	if (field->real_type() == MYSQL_TYPE_ENUM
		|| field->real_type() == MYSQL_TYPE_SET) {
osku's avatar
osku committed
4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128

		/* 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()) {
4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152
		/* 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);
		}
4153
	case MYSQL_TYPE_NEWDECIMAL:
4154
		return(DATA_FIXBINARY);
4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165
	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:
4166
		return(DATA_INT);
4167
	case MYSQL_TYPE_FLOAT:
4168
		return(DATA_FLOAT);
4169
	case MYSQL_TYPE_DOUBLE:
4170
		return(DATA_DOUBLE);
4171
	case MYSQL_TYPE_DECIMAL:
4172
		return(DATA_DECIMAL);
4173 4174 4175 4176 4177
	case MYSQL_TYPE_GEOMETRY:
	case MYSQL_TYPE_TINY_BLOB:
	case MYSQL_TYPE_MEDIUM_BLOB:
	case MYSQL_TYPE_BLOB:
	case MYSQL_TYPE_LONG_BLOB:
4178
		return(DATA_BLOB);
4179 4180 4181 4182 4183
	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;
4184
	default:
4185
		ut_error;
osku's avatar
osku committed
4186 4187 4188 4189 4190
	}

	return(0);
}

4191
/*******************************************************************//**
osku's avatar
osku committed
4192 4193
Writes an unsigned integer value < 64k to 2 bytes, in the little-endian
storage format. */
4194
static inline
osku's avatar
osku committed
4195 4196 4197
void
innobase_write_to_2_little_endian(
/*==============================*/
4198 4199
	byte*	buf,	/*!< in: where to store */
	ulint	val)	/*!< in: value to write, must be < 64k */
osku's avatar
osku committed
4200 4201 4202 4203 4204 4205 4206
{
	ut_a(val < 256 * 256);

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

4207
/*******************************************************************//**
osku's avatar
osku committed
4208
Reads an unsigned integer value < 64k from 2 bytes, in the little-endian
4209 4210
storage format.
@return	value */
4211
static inline
osku's avatar
osku committed
4212 4213 4214
uint
innobase_read_from_2_little_endian(
/*===============================*/
4215
	const uchar*	buf)	/*!< in: from where to read */
osku's avatar
osku committed
4216 4217 4218 4219
{
	return (uint) ((ulint)(buf[0]) + 256 * ((ulint)(buf[1])));
}

4220
/*******************************************************************//**
4221 4222
Stores a key value for a row to a buffer.
@return	key value length as stored in buff */
4223
UNIV_INTERN
osku's avatar
osku committed
4224 4225 4226
uint
ha_innobase::store_key_val_for_row(
/*===============================*/
4227 4228
	uint		keynr,	/*!< in: key number */
	char*		buff,	/*!< in/out: buffer for the key value (in MySQL
osku's avatar
osku committed
4229
				format) */
4230 4231
	uint		buff_len,/*!< in: buffer length */
	const uchar*	record)/*!< in: row in MySQL format */
osku's avatar
osku committed
4232
{
4233 4234 4235
	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;
osku's avatar
osku committed
4236 4237 4238 4239 4240
	char*		buff_start	= buff;
	enum_field_types mysql_type;
	Field*		field;
	ibool		is_null;

4241
	DBUG_ENTER("store_key_val_for_row");
osku's avatar
osku committed
4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269

	/* 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);

4270 4271
	for (; key_part != end; key_part++) {
		is_null = FALSE;
osku's avatar
osku committed
4272

4273 4274
		if (key_part->null_bit) {
			if (record[key_part->null_offset]
osku's avatar
osku committed
4275 4276 4277
						& key_part->null_bit) {
				*buff = 1;
				is_null = TRUE;
4278
			} else {
osku's avatar
osku committed
4279 4280 4281
				*buff = 0;
			}
			buff++;
4282
		}
osku's avatar
osku committed
4283 4284 4285 4286 4287 4288

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

		if (mysql_type == MYSQL_TYPE_VARCHAR) {
						/* >= 5.0.3 true VARCHAR */
4289 4290 4291 4292 4293
			ulint		lenlen;
			ulint		len;
			const byte*	data;
			ulint		key_len;
			ulint		true_len;
osku's avatar
osku committed
4294
			CHARSET_INFO*	cs;
4295
			int		error=0;
osku's avatar
osku committed
4296

4297 4298
			key_len = key_part->length;

osku's avatar
osku committed
4299
			if (is_null) {
4300
				buff += key_len + 2;
4301

osku's avatar
osku committed
4302 4303
				continue;
			}
4304
			cs = field->charset();
osku's avatar
osku committed
4305 4306 4307 4308

			lenlen = (ulint)
				(((Field_varstring*)field)->length_bytes);

4309
			data = row_mysql_read_true_varchar(&len,
osku's avatar
osku committed
4310 4311 4312 4313
				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
				lenlen);

4314 4315 4316 4317 4318 4319 4320 4321 4322
			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,
4323 4324
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
4325 4326 4327
						&error);
			}

osku's avatar
osku committed
4328 4329 4330
			/* In a column prefix index, we may need to truncate
			the stored value: */

4331 4332
			if (true_len > key_len) {
				true_len = key_len;
osku's avatar
osku committed
4333 4334 4335 4336 4337
			}

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

4338
			row_mysql_store_true_var_len((byte*)buff, true_len, 2);
osku's avatar
osku committed
4339 4340
			buff += 2;

4341
			memcpy(buff, data, true_len);
osku's avatar
osku committed
4342 4343 4344 4345 4346 4347 4348

			/* 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. */

4349
			buff += key_len;
osku's avatar
osku committed
4350

4351 4352 4353
		} else if (mysql_type == MYSQL_TYPE_TINY_BLOB
			|| mysql_type == MYSQL_TYPE_MEDIUM_BLOB
			|| mysql_type == MYSQL_TYPE_BLOB
4354 4355 4356 4357
			|| mysql_type == MYSQL_TYPE_LONG_BLOB
			/* MYSQL_TYPE_GEOMETRY data is treated
			as BLOB data in innodb. */
			|| mysql_type == MYSQL_TYPE_GEOMETRY) {
osku's avatar
osku committed
4358 4359 4360

			CHARSET_INFO*	cs;
			ulint		key_len;
4361
			ulint		true_len;
osku's avatar
osku committed
4362
			int		error=0;
4363
			ulint		blob_len;
4364
			const byte*	blob_data;
osku's avatar
osku committed
4365 4366 4367

			ut_a(key_part->key_part_flag & HA_PART_KEY_SEG);

4368 4369
			key_len = key_part->length;

4370
			if (is_null) {
4371
				buff += key_len + 2;
4372

osku's avatar
osku committed
4373 4374
				continue;
			}
4375

4376 4377
			cs = field->charset();

4378
			blob_data = row_mysql_read_blob_ref(&blob_len,
osku's avatar
osku committed
4379 4380 4381 4382
				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
					(ulint) field->pack_length());

4383 4384
			true_len = blob_len;

osku's avatar
osku committed
4385
			ut_a(get_field_offset(table, field)
4386
				== key_part->offset);
osku's avatar
osku committed
4387

4388 4389
			/* For multi byte character sets we need to calculate
			the true length of the key */
4390

4391 4392 4393
			if (blob_len > 0 && cs->mbmaxlen > 1) {
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) blob_data,
4394
						(const char *) blob_data
4395
							+ blob_len,
4396 4397
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
4398 4399 4400
						&error);
			}

osku's avatar
osku committed
4401 4402 4403 4404
			/* 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: */

4405 4406
			if (true_len > key_len) {
				true_len = key_len;
osku's avatar
osku committed
4407 4408 4409 4410 4411 4412
			}

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

			innobase_write_to_2_little_endian(
4413
					(byte*)buff, true_len);
osku's avatar
osku committed
4414 4415
			buff += 2;

4416
			memcpy(buff, blob_data, true_len);
osku's avatar
osku committed
4417 4418 4419 4420

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

4421
			buff += key_len;
osku's avatar
osku committed
4422 4423 4424 4425 4426 4427 4428
		} 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;
4429 4430
			ulint			true_len;
			ulint			key_len;
4431
			const uchar*		src_start;
osku's avatar
osku committed
4432
			int			error=0;
4433 4434 4435
			enum_field_types	real_type;

			key_len = key_part->length;
osku's avatar
osku committed
4436

4437
			if (is_null) {
4438
				 buff += key_len;
4439

osku's avatar
osku committed
4440 4441 4442 4443
				 continue;
			}

			src_start = record + key_part->offset;
4444 4445
			real_type = field->real_type();
			true_len = key_len;
osku's avatar
osku committed
4446

4447 4448 4449 4450 4451
			/* 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. */

4452 4453
			if (real_type != MYSQL_TYPE_ENUM
				&& real_type != MYSQL_TYPE_SET
4454 4455 4456 4457 4458
				&& ( mysql_type == MYSQL_TYPE_VAR_STRING
					|| mysql_type == MYSQL_TYPE_STRING)) {

				cs = field->charset();

4459
				/* For multi byte character sets we need to
4460 4461 4462 4463
				calculate the true length of the key */

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

4464
					true_len = (ulint)
4465 4466
						cs->cset->well_formed_len(cs,
							(const char *)src_start,
4467
							(const char *)src_start
4468
								+ key_len,
4469 4470
                                                        (uint) (key_len /
                                                                cs->mbmaxlen),
4471 4472
							&error);
				}
osku's avatar
osku committed
4473 4474
			}

4475 4476
			memcpy(buff, src_start, true_len);
			buff += true_len;
osku's avatar
osku committed
4477

4478
			/* Pad the unused space with spaces. */
osku's avatar
osku committed
4479

4480
			if (true_len < key_len) {
4481 4482 4483 4484 4485
				ulint	pad_len = key_len - true_len;
				ut_a(!(pad_len % cs->mbminlen));

				cs->cset->fill(cs, buff, pad_len,
					       0x20 /* space */);
4486
				buff += pad_len;
osku's avatar
osku committed
4487 4488
			}
		}
4489
	}
osku's avatar
osku committed
4490 4491 4492 4493 4494 4495

	ut_a(buff <= buff_start + buff_len);

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

4496
/**************************************************************//**
osku's avatar
osku committed
4497 4498
Builds a 'template' to the prebuilt struct. The template is used in fast
retrieval of just those column values MySQL needs in its processing. */
4499
static
osku's avatar
osku committed
4500
void
4501
build_template(
osku's avatar
osku committed
4502
/*===========*/
4503 4504
	row_prebuilt_t*	prebuilt,	/*!< in/out: prebuilt struct */
	THD*		thd,		/*!< in: current user thread, used
osku's avatar
osku committed
4505 4506
					only if templ_type is
					ROW_MYSQL_REC_FIELDS */
4507 4508
	TABLE*		table,		/*!< in: MySQL table */
	uint		templ_type)	/*!< in: ROW_MYSQL_WHOLE_ROW or
osku's avatar
osku committed
4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527
					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. */

4528
		templ_type = ROW_MYSQL_WHOLE_ROW;
osku's avatar
osku committed
4529 4530 4531
	}

	if (templ_type == ROW_MYSQL_REC_FIELDS) {
4532 4533
		if (prebuilt->hint_need_to_fetch_extra_cols
			== ROW_RETRIEVE_ALL_COLS) {
osku's avatar
osku committed
4534

4535 4536
			/* We know we must at least fetch all columns in the
			key, or all columns in the table */
osku's avatar
osku committed
4537

4538 4539 4540 4541 4542 4543 4544
			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 */
osku's avatar
osku committed
4545

4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559
				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;
osku's avatar
osku committed
4560 4561 4562
		}
	}

4563
	clust_index = dict_table_get_first_index(prebuilt->table);
osku's avatar
osku committed
4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582

	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*)
4583
			mem_alloc(n_fields * sizeof(mysql_row_templ_t));
osku's avatar
osku committed
4584 4585 4586 4587 4588 4589 4590 4591 4592 4593
	}

	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++) {
4594
		const dict_col_t* col = &index->table->cols[i];
osku's avatar
osku committed
4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616
		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;
			}

4617 4618
			if (bitmap_is_set(table->read_set, i) ||
			    bitmap_is_set(table->write_set, i)) {
osku's avatar
osku committed
4619 4620 4621 4622 4623 4624
				/* This field is needed in the query */

				goto include_field;
			}

			if (fetch_primary_key_cols
4625 4626
				&& dict_table_col_in_clustered_key(
					index->table, i)) {
osku's avatar
osku committed
4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639
				/* 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;
4640 4641
		templ->clust_rec_field_no = dict_col_get_clust_pos(
			col, clust_index);
4642
		ut_ad(templ->clust_rec_field_no != ULINT_UNDEFINED);
osku's avatar
osku committed
4643 4644

		if (index == clust_index) {
4645
			templ->rec_field_no = templ->clust_rec_field_no;
osku's avatar
osku committed
4646 4647 4648
		} else {
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
4649 4650 4651
			if (templ->rec_field_no == ULINT_UNDEFINED) {
				prebuilt->need_to_access_clustered = TRUE;
			}
osku's avatar
osku committed
4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672
		}

		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;
		}
4673
		templ->type = col->mtype;
osku's avatar
osku committed
4674 4675 4676 4677
		templ->mysql_type = (ulint)field->type();

		if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR) {
			templ->mysql_length_bytes = (ulint)
4678
				(((Field_varstring*)field)->length_bytes);
osku's avatar
osku committed
4679
		}
4680

4681 4682 4683 4684
		templ->charset = dtype_get_charset_coll(col->prtype);
		templ->mbminlen = dict_col_get_mbminlen(col);
		templ->mbmaxlen = dict_col_get_mbmaxlen(col);
		templ->is_unsigned = col->prtype & DATA_UNSIGNED;
osku's avatar
osku committed
4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700
		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;

4701
			templ->rec_field_no = templ->clust_rec_field_no;
osku's avatar
osku committed
4702 4703 4704 4705
		}
	}
}

4706
/********************************************************************//**
4707 4708 4709 4710
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
4711 4712
the special lock handling.
@return	DB_SUCCESS if all OK else error code */
4713
UNIV_INTERN
4714 4715
ulint
ha_innobase::innobase_lock_autoinc(void)
4716 4717 4718 4719
/*====================================*/
{
	ulint		error = DB_SUCCESS;

4720 4721 4722
	switch (innobase_autoinc_lock_mode) {
	case AUTOINC_NO_LOCKING:
		/* Acquire only the AUTOINC mutex. */
4723
		dict_table_autoinc_lock(prebuilt->table);
4724
		break;
4725

4726 4727 4728 4729 4730
	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. */
4731 4732
		if (thd_sql_command(user_thd) == SQLCOM_INSERT
		    || thd_sql_command(user_thd) == SQLCOM_REPLACE) {
4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745
			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;
			}
4746
		}
4747 4748 4749
		/* Fall through to old style locking. */

	case AUTOINC_OLD_STYLE_LOCKING:
4750 4751 4752
		error = row_lock_table_autoinc_for_mysql(prebuilt);

		if (error == DB_SUCCESS) {
4753 4754

			/* Acquire the AUTOINC mutex. */
4755 4756
			dict_table_autoinc_lock(prebuilt->table);
		}
4757 4758 4759 4760
		break;

	default:
		ut_error;
4761 4762 4763 4764 4765
	}

	return(ulong(error));
}

4766
/********************************************************************//**
4767 4768
Reset the autoinc value in the table.
@return	DB_SUCCESS if all went well else error code */
4769
UNIV_INTERN
4770
ulint
4771 4772
ha_innobase::innobase_reset_autoinc(
/*================================*/
4773
	ulonglong	autoinc)	/*!< in: value to store */
4774 4775 4776
{
	ulint		error;

4777
	error = innobase_lock_autoinc();
4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788

	if (error == DB_SUCCESS) {

		dict_table_autoinc_initialize(prebuilt->table, autoinc);

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

4789
/********************************************************************//**
4790
Store the autoinc value in the table. The autoinc value is only set if
4791
it's greater than the existing autoinc value in the table.
4792
@return	DB_SUCCESS if all went well else error code */
4793
UNIV_INTERN
4794
ulint
4795 4796
ha_innobase::innobase_set_max_autoinc(
/*==================================*/
4797
	ulonglong	auto_inc)	/*!< in: value to store */
4798 4799 4800
{
	ulint		error;

4801
	error = innobase_lock_autoinc();
4802 4803 4804

	if (error == DB_SUCCESS) {

4805
		dict_table_autoinc_update_if_greater(prebuilt->table, auto_inc);
4806 4807 4808 4809 4810 4811 4812

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

4813
/********************************************************************//**
osku's avatar
osku committed
4814
Stores a row in an InnoDB database, to the table specified in this
4815 4816
handle.
@return	error code */
4817
UNIV_INTERN
osku's avatar
osku committed
4818 4819 4820
int
ha_innobase::write_row(
/*===================*/
4821
	uchar*	record)	/*!< in: a row in MySQL format */
osku's avatar
osku committed
4822
{
4823 4824
	ulint		error = 0;
        int             error_result= 0;
4825
	ibool		auto_inc_used= FALSE;
4826 4827
	ulint		sql_command;
	trx_t*		trx = thd_to_trx(user_thd);
osku's avatar
osku committed
4828

4829
	DBUG_ENTER("ha_innobase::write_row");
osku's avatar
osku committed
4830

4831
	if (prebuilt->trx != trx) {
osku's avatar
osku committed
4832 4833
	  sql_print_error("The transaction object for the table handle is at "
			  "%p, but for the current thread it is at %p",
4834
			  (const void*) prebuilt->trx, (const void*) trx);
osku's avatar
osku committed
4835 4836 4837 4838

		fputs("InnoDB: Dump of 200 bytes around prebuilt: ", stderr);
		ut_print_buf(stderr, ((const byte*)prebuilt) - 100, 200);
		fputs("\n"
4839
			"InnoDB: Dump of 200 bytes around ha_data: ",
osku's avatar
osku committed
4840
			stderr);
4841
		ut_print_buf(stderr, ((const byte*) trx) - 100, 200);
osku's avatar
osku committed
4842 4843 4844 4845
		putc('\n', stderr);
		ut_error;
	}

4846
	ha_statistic_increment(&SSV::ha_write_count);
osku's avatar
osku committed
4847

4848 4849
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
		table->timestamp_field->set_time();
osku's avatar
osku committed
4850

4851 4852 4853 4854 4855 4856 4857
	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) {
osku's avatar
osku committed
4858 4859 4860 4861 4862 4863 4864 4865 4866 4867
		/* 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;
4868
		enum lock_mode	mode;
osku's avatar
osku committed
4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884

		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,
4885
				"  InnoDB: ALTER TABLE is holding lock"
osku's avatar
osku committed
4886 4887 4888 4889 4890 4891 4892 4893 4894
				" 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 */
4895
			innobase_commit(ht, user_thd, 1);
osku's avatar
osku committed
4896
			/* Note that this transaction is still active. */
4897
			trx_register_for_2pc(prebuilt->trx);
osku's avatar
osku committed
4898
			/* We will need an IX lock on the destination table. */
4899
			prebuilt->sql_stat_start = TRUE;
osku's avatar
osku committed
4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910
		} 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. */
4911
			innobase_commit(ht, user_thd, 1);
osku's avatar
osku committed
4912
			/* Note that this transaction is still active. */
4913
			trx_register_for_2pc(prebuilt->trx);
osku's avatar
osku committed
4914 4915 4916
			/* 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. */
4917
			prebuilt->sql_stat_start = TRUE;
osku's avatar
osku committed
4918 4919 4920 4921 4922
		}
	}

	num_write_row++;

4923
	/* This is the case where the table has an auto-increment column */
4924
	if (table->next_number_field && record == table->record[0]) {
osku's avatar
osku committed
4925

4926 4927 4928 4929
		/* Reset the error code before calling
		innobase_get_auto_increment(). */
		prebuilt->autoinc_error = DB_SUCCESS;

4930
		if ((error = update_auto_increment())) {
4931 4932
			/* We don't want to mask autoinc overflow errors. */

4933 4934 4935 4936 4937 4938 4939 4940 4941
			/* 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;
4942 4943 4944 4945
				goto report_error;
			}

			/* MySQL errors are passed straight back. */
4946
			error_result = (int) error;
osku's avatar
osku committed
4947 4948 4949
			goto func_exit;
		}

4950
		auto_inc_used = TRUE;
osku's avatar
osku committed
4951 4952 4953
	}

	if (prebuilt->mysql_template == NULL
4954 4955
	    || prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) {

osku's avatar
osku committed
4956 4957 4958 4959 4960 4961 4962 4963 4964 4965
		/* 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);

4966 4967
	/* Handle duplicate key errors */
	if (auto_inc_used) {
4968
		ulint		err;
4969
		ulonglong	auto_inc;
4970
		ulonglong	col_max_value;
osku's avatar
osku committed
4971

4972 4973 4974 4975 4976 4977 4978
		/* 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;
		}
osku's avatar
osku committed
4979

4980 4981 4982 4983 4984
		/* 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);

4985
		/* Get the value that MySQL attempted to store in the table.*/
4986
		auto_inc = table->next_number_field->val_int();
osku's avatar
osku committed
4987

4988 4989
		switch (error) {
		case DB_DUPLICATE_KEY:
osku's avatar
osku committed
4990

4991 4992 4993 4994
			/* 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. */
osku's avatar
osku committed
4995

4996 4997 4998 4999
			switch (sql_command) {
			case SQLCOM_LOAD:
				if ((trx->duplicates
				    & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))) {
osku's avatar
osku committed
5000

5001 5002 5003
					goto set_max_autoinc;
				}
				break;
osku's avatar
osku committed
5004

5005 5006 5007 5008
			case SQLCOM_REPLACE:
			case SQLCOM_INSERT_SELECT:
			case SQLCOM_REPLACE_SELECT:
				goto set_max_autoinc;
osku's avatar
osku committed
5009

5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021
			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.*/

5022
			if (auto_inc >= prebuilt->autoinc_last_value) {
5023
set_max_autoinc:
5024 5025 5026 5027
				/* This should filter out the negative
				values set explicitly by the user. */
				if (auto_inc <= col_max_value) {
					ut_a(prebuilt->autoinc_increment > 0);
5028

5029 5030
					ulonglong	need;
					ulonglong	offset;
5031

5032 5033
					offset = prebuilt->autoinc_offset;
					need = prebuilt->autoinc_increment;
5034

5035 5036 5037
					auto_inc = innobase_next_autoinc(
						auto_inc,
						need, offset, col_max_value);
5038

5039 5040
					err = innobase_set_max_autoinc(
						auto_inc);
5041

5042 5043 5044
					if (err != DB_SUCCESS) {
						error = err;
					}
5045
				}
5046 5047
			}
			break;
5048 5049
		}
	}
osku's avatar
osku committed
5050 5051 5052

	innodb_srv_conc_exit_innodb(prebuilt->trx);

5053
report_error:
5054 5055 5056
	error_result = convert_error_code_to_mysql((int) error,
						   prebuilt->table->flags,
						   user_thd);
osku's avatar
osku committed
5057 5058 5059 5060

func_exit:
	innobase_active_small();

5061
	DBUG_RETURN(error_result);
osku's avatar
osku committed
5062 5063
}

5064
/**********************************************************************//**
osku's avatar
osku committed
5065
Checks which fields have changed in a row and stores information
5066 5067
of them to an update vector.
@return	error number or 0 */
osku's avatar
osku committed
5068 5069 5070 5071
static
int
calc_row_difference(
/*================*/
5072 5073 5074
	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 */
5075
	TABLE*		table,		/*!< in: table in MySQL data
osku's avatar
osku committed
5076
					dictionary */
5077 5078 5079 5080
	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 */
osku's avatar
osku committed
5081
{
5082
	uchar*		original_upd_buff = upd_buff;
osku's avatar
osku committed
5083 5084 5085 5086 5087 5088
	Field*		field;
	enum_field_types field_mysql_type;
	uint		n_fields;
	ulint		o_len;
	ulint		n_len;
	ulint		col_pack_len;
5089 5090 5091
	const byte*	new_mysql_row_col;
	const byte*	o_ptr;
	const byte*	n_ptr;
5092
	byte*		buf;
osku's avatar
osku committed
5093 5094 5095 5096
	upd_field_t*	ufield;
	ulint		col_type;
	ulint		n_changed = 0;
	dfield_t	dfield;
5097
	dict_index_t*	clust_index;
osku's avatar
osku committed
5098 5099 5100
	uint		i;

	n_fields = table->s->fields;
5101
	clust_index = dict_table_get_first_index(prebuilt->table);
osku's avatar
osku committed
5102 5103 5104 5105 5106 5107 5108

	/* We use upd_buff to convert changed fields */
	buf = (byte*) upd_buff;

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

5109 5110
		o_ptr = (const byte*) old_row + get_field_offset(table, field);
		n_ptr = (const byte*) new_row + get_field_offset(table, field);
5111

osku's avatar
osku committed
5112 5113 5114 5115 5116 5117 5118 5119 5120
		/* 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
5121
		comparison. */
osku's avatar
osku committed
5122 5123

		field_mysql_type = field->type();
5124

5125
		col_type = prebuilt->table->cols[i].mtype;
osku's avatar
osku committed
5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141

		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 */
5142

osku's avatar
osku committed
5143
				o_ptr = row_mysql_read_true_varchar(
5144 5145 5146 5147
					&o_len, o_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));

osku's avatar
osku committed
5148
				n_ptr = row_mysql_read_true_varchar(
5149 5150 5151
					&n_len, n_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));
osku's avatar
osku committed
5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175
			}

			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;
5176

osku's avatar
osku committed
5177 5178 5179
			/* Let us use a dummy dfield to make the conversion
			from the MySQL column format to the InnoDB format */

5180
			dict_col_copy_type(prebuilt->table->cols + i,
5181
					   dfield_get_type(&dfield));
osku's avatar
osku committed
5182 5183 5184

			if (n_len != UNIV_SQL_NULL) {
				buf = row_mysql_store_col_in_innobase_format(
5185 5186 5187 5188 5189
					&dfield,
					(byte*)buf,
					TRUE,
					new_mysql_row_col,
					col_pack_len,
5190
					dict_table_is_comp(prebuilt->table));
5191
				dfield_copy_data(&ufield->new_val, &dfield);
osku's avatar
osku committed
5192
			} else {
5193
				dfield_set_null(&ufield->new_val);
osku's avatar
osku committed
5194 5195 5196
			}

			ufield->exp = NULL;
5197
			ufield->orig_len = 0;
5198
			ufield->field_no = dict_col_get_clust_pos(
5199
				&prebuilt->table->cols[i], clust_index);
osku's avatar
osku committed
5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211
			n_changed++;
		}
	}

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

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

	return(0);
}

5212
/**********************************************************************//**
osku's avatar
osku committed
5213 5214 5215 5216 5217
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
5218 5219
if its index columns are updated!
@return	error number or 0 */
5220
UNIV_INTERN
osku's avatar
osku committed
5221 5222 5223
int
ha_innobase::update_row(
/*====================*/
5224 5225
	const uchar*	old_row,	/*!< in: old row in MySQL format */
	uchar*		new_row)	/*!< in: new row in MySQL format */
osku's avatar
osku committed
5226 5227 5228
{
	upd_t*		uvect;
	int		error = 0;
5229
	trx_t*		trx = thd_to_trx(user_thd);
osku's avatar
osku committed
5230 5231 5232

	DBUG_ENTER("ha_innobase::update_row");

5233
	ut_a(prebuilt->trx == trx);
osku's avatar
osku committed
5234

5235 5236
	ha_statistic_increment(&SSV::ha_update_count);

5237 5238
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
		table->timestamp_field->set_time();
osku's avatar
osku committed
5239 5240 5241 5242 5243 5244 5245 5246 5247 5248

	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) */

5249
	calc_row_difference(uvect, (uchar*) old_row, new_row, table,
osku's avatar
osku committed
5250 5251 5252 5253 5254 5255
			upd_buff, (ulint)upd_and_key_val_buff_len,
			prebuilt, user_thd);

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

5256
	ut_a(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);
osku's avatar
osku committed
5257

5258
	innodb_srv_conc_enter_innodb(trx);
osku's avatar
osku committed
5259 5260 5261

	error = row_update_for_mysql((byte*) old_row, prebuilt);

5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276
	/* 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)  {

5277 5278
		ulonglong	auto_inc;
		ulonglong	col_max_value;
5279 5280 5281

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

5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296
		/* We need the upper limit of the col type to check for
		whether we update the table autoinc counter or not. */
		col_max_value = innobase_get_int_col_max_value(
			table->next_number_field);

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

			ulonglong	need;
			ulonglong	offset;

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

			auto_inc = innobase_next_autoinc(
				auto_inc, need, offset, col_max_value);
5297

5298
			error = innobase_set_max_autoinc(auto_inc);
5299 5300 5301
		}
	}

5302
	innodb_srv_conc_exit_innodb(trx);
osku's avatar
osku committed
5303

5304 5305
	error = convert_error_code_to_mysql(error,
					    prebuilt->table->flags, user_thd);
osku's avatar
osku committed
5306

5307 5308 5309 5310 5311 5312 5313 5314 5315 5316
	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;
	}

osku's avatar
osku committed
5317 5318 5319 5320 5321 5322 5323 5324
	/* Tell InnoDB server that there might be work for
	utility threads: */

	innobase_active_small();

	DBUG_RETURN(error);
}

5325
/**********************************************************************//**
5326 5327
Deletes a row given as the parameter.
@return	error number or 0 */
5328
UNIV_INTERN
osku's avatar
osku committed
5329 5330 5331
int
ha_innobase::delete_row(
/*====================*/
5332
	const uchar*	record)	/*!< in: a row in MySQL format */
osku's avatar
osku committed
5333 5334
{
	int		error = 0;
5335
	trx_t*		trx = thd_to_trx(user_thd);
osku's avatar
osku committed
5336 5337 5338

	DBUG_ENTER("ha_innobase::delete_row");

5339
	ut_a(prebuilt->trx == trx);
osku's avatar
osku committed
5340

5341 5342
	ha_statistic_increment(&SSV::ha_delete_count);

osku's avatar
osku committed
5343 5344 5345 5346 5347 5348 5349 5350
	if (!prebuilt->upd_node) {
		row_get_prebuilt_update_vector(prebuilt);
	}

	/* This is a delete */

	prebuilt->upd_node->is_delete = TRUE;

5351
	innodb_srv_conc_enter_innodb(trx);
osku's avatar
osku committed
5352 5353 5354

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

5355
	innodb_srv_conc_exit_innodb(trx);
osku's avatar
osku committed
5356

5357 5358
	error = convert_error_code_to_mysql(
		error, prebuilt->table->flags, user_thd);
osku's avatar
osku committed
5359 5360 5361 5362 5363 5364 5365 5366 5367

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

	innobase_active_small();

	DBUG_RETURN(error);
}

5368
/**********************************************************************//**
5369
Removes a new lock set on a row, if it was not read optimistically. This can
5370 5371
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. */
5372
UNIV_INTERN
osku's avatar
osku committed
5373 5374 5375 5376 5377 5378
void
ha_innobase::unlock_row(void)
/*=========================*/
{
	DBUG_ENTER("ha_innobase::unlock_row");

5379 5380 5381 5382 5383 5384 5385
	/* Consistent read does not take any locks, thus there is
	nothing to unlock. */

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

5386 5387
	switch (prebuilt->row_read_type) {
	case ROW_READ_WITH_LOCKS:
5388
		if (!srv_locks_unsafe_for_binlog
5389
		    && prebuilt->trx->isolation_level
Vasil Dimov's avatar
Vasil Dimov committed
5390
		    > TRX_ISO_READ_COMMITTED) {
5391 5392 5393 5394
			break;
		}
		/* fall through */
	case ROW_READ_TRY_SEMI_CONSISTENT:
osku's avatar
osku committed
5395
		row_unlock_for_mysql(prebuilt, FALSE);
5396 5397 5398 5399 5400 5401 5402 5403 5404 5405
		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. */
5406
UNIV_INTERN
5407 5408 5409 5410 5411 5412 5413 5414
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. */
5415
UNIV_INTERN
5416 5417 5418 5419
void
ha_innobase::try_semi_consistent_read(bool yes)
/*===========================================*/
{
5420
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
5421

5422 5423 5424 5425 5426
	/* 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. */

5427 5428
	if (yes
	    && (srv_locks_unsafe_for_binlog
Vasil Dimov's avatar
Vasil Dimov committed
5429
		|| prebuilt->trx->isolation_level <= TRX_ISO_READ_COMMITTED)) {
5430 5431 5432
		prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT;
	} else {
		prebuilt->row_read_type = ROW_READ_WITH_LOCKS;
osku's avatar
osku committed
5433 5434 5435
	}
}

5436
/******************************************************************//**
5437 5438
Initializes a handle to use an index.
@return	0 or error number */
5439
UNIV_INTERN
osku's avatar
osku committed
5440 5441 5442
int
ha_innobase::index_init(
/*====================*/
5443 5444
	uint	keynr,	/*!< in: key (index) number */
	bool sorted)	/*!< in: 1 if result MUST be sorted according to index */
osku's avatar
osku committed
5445
{
5446
	DBUG_ENTER("index_init");
osku's avatar
osku committed
5447

5448
	DBUG_RETURN(change_active_index(keynr));
osku's avatar
osku committed
5449 5450
}

5451
/******************************************************************//**
5452 5453
Currently does nothing.
@return	0 */
5454
UNIV_INTERN
osku's avatar
osku committed
5455 5456 5457 5458
int
ha_innobase::index_end(void)
/*========================*/
{
5459 5460 5461 5462
	int	error	= 0;
	DBUG_ENTER("index_end");
	active_index=MAX_KEY;
	DBUG_RETURN(error);
osku's avatar
osku committed
5463 5464
}

5465
/*********************************************************************//**
osku's avatar
osku committed
5466 5467
Converts a search mode flag understood by MySQL to a flag understood
by InnoDB. */
5468
static inline
osku's avatar
osku committed
5469 5470 5471 5472 5473 5474
ulint
convert_search_mode_to_innobase(
/*============================*/
	enum ha_rkey_function	find_flag)
{
	switch (find_flag) {
5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518
	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);
osku's avatar
osku committed
5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569
}

/*
   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. */


5570
/**********************************************************************//**
osku's avatar
osku committed
5571
Positions an index cursor to the index specified in the handle. Fetches the
5572 5573
row if any.
@return	0, HA_ERR_KEY_NOT_FOUND, or error number */
5574
UNIV_INTERN
osku's avatar
osku committed
5575 5576 5577
int
ha_innobase::index_read(
/*====================*/
5578
	uchar*		buf,		/*!< in/out: buffer for the returned
osku's avatar
osku committed
5579
					row */
5580
	const uchar*	key_ptr,	/*!< in: key value; if this is NULL
osku's avatar
osku committed
5581 5582 5583 5584 5585 5586 5587 5588
					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 */
5589 5590
	uint			key_len,/*!< in: key value length */
	enum ha_rkey_function find_flag)/*!< in: search flags from my_base.h */
osku's avatar
osku committed
5591 5592 5593
{
	ulint		mode;
	dict_index_t*	index;
5594 5595
	ulint		match_mode	= 0;
	int		error;
osku's avatar
osku committed
5596 5597
	ulint		ret;

5598
	DBUG_ENTER("index_read");
osku's avatar
osku committed
5599

5600
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
osku's avatar
osku committed
5601

5602
	ha_statistic_increment(&SSV::ha_read_key_count);
osku's avatar
osku committed
5603 5604 5605

	index = prebuilt->index;

5606 5607 5608 5609
	if (UNIV_UNLIKELY(index == NULL)) {
		prebuilt->index_usable = FALSE;
		DBUG_RETURN(HA_ERR_CRASHED);
	}
5610 5611 5612
	if (UNIV_UNLIKELY(!prebuilt->index_usable)) {
		DBUG_RETURN(HA_ERR_TABLE_DEF_CHANGED);
	}
5613

osku's avatar
osku committed
5614
	/* Note that if the index for which the search template is built is not
5615
	necessarily prebuilt->index, but can also be the clustered index */
osku's avatar
osku committed
5616 5617

	if (prebuilt->sql_stat_start) {
5618
		build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS);
osku's avatar
osku committed
5619 5620 5621
	}

	if (key_ptr) {
5622
		/* Convert the search key value to InnoDB format into
osku's avatar
osku committed
5623 5624
		prebuilt->search_tuple */

5625 5626 5627 5628 5629 5630 5631 5632
		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);
osku's avatar
osku committed
5633 5634 5635 5636
	} else {
		/* We position the cursor to the last or the first entry
		in the index */

5637
		dtuple_set_n_fields(prebuilt->search_tuple, 0);
osku's avatar
osku committed
5638 5639 5640 5641 5642 5643 5644
	}

	mode = convert_search_mode_to_innobase(find_flag);

	match_mode = 0;

	if (find_flag == HA_READ_KEY_EXACT) {
5645

osku's avatar
osku committed
5646 5647 5648
		match_mode = ROW_SEL_EXACT;

	} else if (find_flag == HA_READ_PREFIX
5649 5650
		   || find_flag == HA_READ_PREFIX_LAST) {

osku's avatar
osku committed
5651 5652 5653 5654 5655
		match_mode = ROW_SEL_EXACT_PREFIX;
	}

	last_match_mode = (uint) match_mode;

5656
	if (mode != PAGE_CUR_UNSUPP) {
osku's avatar
osku committed
5657

5658
		innodb_srv_conc_enter_innodb(prebuilt->trx);
osku's avatar
osku committed
5659

5660 5661 5662 5663 5664 5665 5666 5667
		ret = row_search_for_mysql((byte*) buf, mode, prebuilt,
					   match_mode, 0);

		innodb_srv_conc_exit_innodb(prebuilt->trx);
	} else {

		ret = DB_UNSUPPORTED;
	}
osku's avatar
osku committed
5668

5669 5670
	switch (ret) {
	case DB_SUCCESS:
osku's avatar
osku committed
5671 5672
		error = 0;
		table->status = 0;
5673 5674
		break;
	case DB_RECORD_NOT_FOUND:
osku's avatar
osku committed
5675 5676
		error = HA_ERR_KEY_NOT_FOUND;
		table->status = STATUS_NOT_FOUND;
5677 5678
		break;
	case DB_END_OF_INDEX:
osku's avatar
osku committed
5679 5680
		error = HA_ERR_KEY_NOT_FOUND;
		table->status = STATUS_NOT_FOUND;
5681 5682 5683 5684 5685
		break;
	default:
		error = convert_error_code_to_mysql((int) ret,
						    prebuilt->table->flags,
						    user_thd);
osku's avatar
osku committed
5686
		table->status = STATUS_NOT_FOUND;
5687
		break;
osku's avatar
osku committed
5688 5689 5690 5691 5692
	}

	DBUG_RETURN(error);
}

5693
/*******************************************************************//**
osku's avatar
osku committed
5694
The following functions works like index_read, but it find the last
5695 5696
row with the current key value or prefix.
@return	0, HA_ERR_KEY_NOT_FOUND, or an error code */
5697
UNIV_INTERN
osku's avatar
osku committed
5698 5699 5700
int
ha_innobase::index_read_last(
/*=========================*/
5701 5702
	uchar*		buf,	/*!< out: fetched row */
	const uchar*	key_ptr,/*!< in: key value, or a prefix of a full
5703
				key value */
5704
	uint		key_len)/*!< in: length of the key val or prefix
5705
				in bytes */
osku's avatar
osku committed
5706
{
5707
	return(index_read(buf, key_ptr, key_len, HA_READ_PREFIX_LAST));
osku's avatar
osku committed
5708 5709
}

5710
/********************************************************************//**
5711 5712
Get the index for a handle. Does not change active index.
@return	NULL or index instance. */
5713
UNIV_INTERN
5714 5715 5716
dict_index_t*
ha_innobase::innobase_get_index(
/*============================*/
5717
	uint		keynr)	/*!< in: use this index; MAX_KEY means always
5718 5719
				clustered index, even if it was internally
				generated by InnoDB */
osku's avatar
osku committed
5720
{
5721
	KEY*		key = 0;
5722 5723 5724
	dict_index_t*	index = 0;

	DBUG_ENTER("innobase_get_index");
5725
	ha_statistic_increment(&SSV::ha_read_key_count);
osku's avatar
osku committed
5726 5727

	if (keynr != MAX_KEY && table->s->keys > 0) {
5728
		key = table->key_info + keynr;
osku's avatar
osku committed
5729

5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750
		index = innobase_index_lookup(share, keynr);

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

			index = dict_table_get_index_on_name(prebuilt->table,
							     key->name);
		}
5751
	} else {
5752
		index = dict_table_get_first_index(prebuilt->table);
osku's avatar
osku committed
5753 5754
	}

5755
	if (!index) {
5756 5757 5758 5759 5760
		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);
5761 5762 5763 5764 5765
	}

	DBUG_RETURN(index);
}

5766
/********************************************************************//**
5767 5768
Changes the active index of a handle.
@return	0 or error code */
5769
UNIV_INTERN
5770 5771 5772
int
ha_innobase::change_active_index(
/*=============================*/
5773
	uint	keynr)	/*!< in: use this index; MAX_KEY means always clustered
5774 5775 5776 5777
			index, even if it was internally generated by
			InnoDB */
{
	DBUG_ENTER("change_active_index");
5778

5779 5780 5781 5782 5783 5784 5785
	ut_ad(user_thd == ha_thd());
	ut_a(prebuilt->trx == thd_to_trx(user_thd));

	active_index = keynr;

	prebuilt->index = innobase_get_index(keynr);

5786 5787 5788
	if (UNIV_UNLIKELY(!prebuilt->index)) {
		sql_print_warning("InnoDB: change_active_index(%u) failed",
				  keynr);
5789
		prebuilt->index_usable = FALSE;
5790
		DBUG_RETURN(1);
osku's avatar
osku committed
5791 5792
	}

5793 5794 5795 5796
	prebuilt->index_usable = row_merge_is_index_usable(prebuilt->trx,
							   prebuilt->index);

	if (UNIV_UNLIKELY(!prebuilt->index_usable)) {
5797 5798 5799 5800
		push_warning_printf(user_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				    HA_ERR_TABLE_DEF_CHANGED,
				    "InnoDB: insufficient history for index %u",
				    keynr);
5801 5802 5803 5804 5805
		/* The caller seems to ignore this.  Thus, we must check
		this again in row_search_for_mysql(). */
		DBUG_RETURN(2);
	}

5806
	ut_a(prebuilt->search_tuple != 0);
osku's avatar
osku committed
5807 5808 5809 5810

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

	dict_index_copy_types(prebuilt->search_tuple, prebuilt->index,
5811
			      prebuilt->index->n_fields);
osku's avatar
osku committed
5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823

	/* 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);
}

5824
/**********************************************************************//**
osku's avatar
osku committed
5825
Positions an index cursor to the index specified in keynr. Fetches the
5826
row if any.
5827 5828
??? This is only used to read whole keys ???
@return	error number or 0 */
5829
UNIV_INTERN
osku's avatar
osku committed
5830 5831 5832
int
ha_innobase::index_read_idx(
/*========================*/
5833
	uchar*		buf,		/*!< in/out: buffer for the returned
osku's avatar
osku committed
5834
					row */
5835 5836
	uint		keynr,		/*!< in: use this index */
	const uchar*	key,		/*!< in: key value; if this is NULL
osku's avatar
osku committed
5837 5838
					we position the cursor at the
					start or end of index */
5839 5840
	uint		key_len,	/*!< in: key value length */
	enum ha_rkey_function find_flag)/*!< in: search flags from my_base.h */
osku's avatar
osku committed
5841 5842 5843 5844 5845 5846 5847 5848 5849
{
	if (change_active_index(keynr)) {

		return(1);
	}

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

5850
/***********************************************************************//**
osku's avatar
osku committed
5851
Reads the next or previous row from a cursor, which must have previously been
5852 5853
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5854
UNIV_INTERN
osku's avatar
osku committed
5855 5856 5857
int
ha_innobase::general_fetch(
/*=======================*/
5858
	uchar*	buf,		/*!< in/out: buffer for next row in MySQL
osku's avatar
osku committed
5859
				format */
5860 5861
	uint	direction,	/*!< in: ROW_SEL_NEXT or ROW_SEL_PREV */
	uint	match_mode)	/*!< in: 0, ROW_SEL_EXACT, or
osku's avatar
osku committed
5862 5863 5864 5865 5866 5867 5868
				ROW_SEL_EXACT_PREFIX */
{
	ulint		ret;
	int		error	= 0;

	DBUG_ENTER("general_fetch");

5869
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
osku's avatar
osku committed
5870 5871 5872

	innodb_srv_conc_enter_innodb(prebuilt->trx);

5873 5874 5875
	ret = row_search_for_mysql(
		(byte*)buf, 0, prebuilt, match_mode, direction);

osku's avatar
osku committed
5876 5877
	innodb_srv_conc_exit_innodb(prebuilt->trx);

5878 5879
	switch (ret) {
	case DB_SUCCESS:
osku's avatar
osku committed
5880 5881
		error = 0;
		table->status = 0;
5882 5883
		break;
	case DB_RECORD_NOT_FOUND:
osku's avatar
osku committed
5884 5885
		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;
5886 5887
		break;
	case DB_END_OF_INDEX:
osku's avatar
osku committed
5888 5889
		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;
5890 5891 5892 5893
		break;
	default:
		error = convert_error_code_to_mysql(
			(int) ret, prebuilt->table->flags, user_thd);
osku's avatar
osku committed
5894
		table->status = STATUS_NOT_FOUND;
5895
		break;
osku's avatar
osku committed
5896 5897 5898 5899 5900
	}

	DBUG_RETURN(error);
}

5901
/***********************************************************************//**
osku's avatar
osku committed
5902
Reads the next row from a cursor, which must have previously been
5903 5904
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5905
UNIV_INTERN
osku's avatar
osku committed
5906 5907 5908
int
ha_innobase::index_next(
/*====================*/
5909
	uchar*		buf)	/*!< in/out: buffer for next row in MySQL
osku's avatar
osku committed
5910 5911
				format */
{
5912
	ha_statistic_increment(&SSV::ha_read_next_count);
osku's avatar
osku committed
5913 5914 5915 5916

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

5917
/*******************************************************************//**
5918 5919
Reads the next row matching to the key value given as the parameter.
@return	0, HA_ERR_END_OF_FILE, or error number */
5920
UNIV_INTERN
osku's avatar
osku committed
5921 5922 5923
int
ha_innobase::index_next_same(
/*=========================*/
5924 5925 5926
	uchar*		buf,	/*!< in/out: buffer for the row */
	const uchar*	key,	/*!< in: key value */
	uint		keylen)	/*!< in: key value length */
osku's avatar
osku committed
5927
{
5928
	ha_statistic_increment(&SSV::ha_read_next_count);
osku's avatar
osku committed
5929 5930 5931 5932

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

5933
/***********************************************************************//**
osku's avatar
osku committed
5934
Reads the previous row from a cursor, which must have previously been
5935 5936
positioned using index_read.
@return	0, HA_ERR_END_OF_FILE, or error number */
5937
UNIV_INTERN
osku's avatar
osku committed
5938 5939 5940
int
ha_innobase::index_prev(
/*====================*/
5941
	uchar*	buf)	/*!< in/out: buffer for previous row in MySQL format */
osku's avatar
osku committed
5942
{
5943
	ha_statistic_increment(&SSV::ha_read_prev_count);
5944

osku's avatar
osku committed
5945 5946 5947
	return(general_fetch(buf, ROW_SEL_PREV, 0));
}

5948
/********************************************************************//**
osku's avatar
osku committed
5949
Positions a cursor on the first record in an index and reads the
5950 5951
corresponding row to buf.
@return	0, HA_ERR_END_OF_FILE, or error code */
5952
UNIV_INTERN
osku's avatar
osku committed
5953 5954 5955
int
ha_innobase::index_first(
/*=====================*/
5956
	uchar*	buf)	/*!< in/out: buffer for the row */
osku's avatar
osku committed
5957 5958 5959
{
	int	error;

5960
	DBUG_ENTER("index_first");
5961
	ha_statistic_increment(&SSV::ha_read_first_count);
osku's avatar
osku committed
5962

5963
	error = index_read(buf, NULL, 0, HA_READ_AFTER_KEY);
osku's avatar
osku committed
5964

5965
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
osku's avatar
osku committed
5966

5967 5968 5969
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
osku's avatar
osku committed
5970

5971
	DBUG_RETURN(error);
osku's avatar
osku committed
5972 5973
}

5974
/********************************************************************//**
osku's avatar
osku committed
5975
Positions a cursor on the last record in an index and reads the
5976 5977
corresponding row to buf.
@return	0, HA_ERR_END_OF_FILE, or error code */
5978
UNIV_INTERN
osku's avatar
osku committed
5979 5980 5981
int
ha_innobase::index_last(
/*====================*/
5982
	uchar*	buf)	/*!< in/out: buffer for the row */
osku's avatar
osku committed
5983 5984 5985
{
	int	error;

5986
	DBUG_ENTER("index_last");
5987
	ha_statistic_increment(&SSV::ha_read_last_count);
osku's avatar
osku committed
5988

5989
	error = index_read(buf, NULL, 0, HA_READ_BEFORE_KEY);
osku's avatar
osku committed
5990

5991
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
osku's avatar
osku committed
5992

5993 5994 5995
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
osku's avatar
osku committed
5996

5997
	DBUG_RETURN(error);
osku's avatar
osku committed
5998 5999
}

6000
/****************************************************************//**
6001 6002
Initialize a table scan.
@return	0 or error number */
6003
UNIV_INTERN
osku's avatar
osku committed
6004 6005 6006
int
ha_innobase::rnd_init(
/*==================*/
6007
	bool	scan)	/*!< in: TRUE if table/index scan FALSE otherwise */
osku's avatar
osku committed
6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019
{
	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);
	}

6020 6021 6022 6023 6024 6025 6026
	/* 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);
	}

6027
	start_of_scan = 1;
osku's avatar
osku committed
6028

6029
	return(err);
osku's avatar
osku committed
6030 6031
}

6032
/*****************************************************************//**
6033 6034
Ends a table scan.
@return	0 or error number */
6035
UNIV_INTERN
osku's avatar
osku committed
6036 6037 6038 6039 6040 6041 6042
int
ha_innobase::rnd_end(void)
/*======================*/
{
	return(index_end());
}

6043
/*****************************************************************//**
osku's avatar
osku committed
6044
Reads the next row in a table scan (also used to read the FIRST row
6045 6046
in a table scan).
@return	0, HA_ERR_END_OF_FILE, or error number */
6047
UNIV_INTERN
osku's avatar
osku committed
6048 6049 6050
int
ha_innobase::rnd_next(
/*==================*/
6051
	uchar*	buf)	/*!< in/out: returns the row in this buffer,
osku's avatar
osku committed
6052 6053 6054 6055
			in MySQL format */
{
	int	error;

6056
	DBUG_ENTER("rnd_next");
6057
	ha_statistic_increment(&SSV::ha_read_rnd_next_count);
osku's avatar
osku committed
6058

6059
	if (start_of_scan) {
osku's avatar
osku committed
6060
		error = index_first(buf);
6061

osku's avatar
osku committed
6062 6063 6064
		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
6065

osku's avatar
osku committed
6066 6067 6068 6069 6070
		start_of_scan = 0;
	} else {
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
	}

6071
	DBUG_RETURN(error);
osku's avatar
osku committed
6072 6073
}

6074
/**********************************************************************//**
6075 6076
Fetches a row from the table based on a row reference.
@return	0, HA_ERR_KEY_NOT_FOUND, or error code */
6077
UNIV_INTERN
osku's avatar
osku committed
6078 6079 6080
int
ha_innobase::rnd_pos(
/*=================*/
6081 6082
	uchar*	buf,	/*!< in/out: buffer for the row */
	uchar*	pos)	/*!< in: primary key value of the row in the
6083 6084 6085
			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 */
osku's avatar
osku committed
6086 6087 6088 6089
{
	int		error;
	uint		keynr	= active_index;
	DBUG_ENTER("rnd_pos");
6090
	DBUG_DUMP("key", pos, ref_length);
osku's avatar
osku committed
6091

6092
	ha_statistic_increment(&SSV::ha_read_rnd_count);
osku's avatar
osku committed
6093

6094
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
osku's avatar
osku committed
6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107

	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) {
6108
		DBUG_PRINT("error", ("Got error: %d", error));
osku's avatar
osku committed
6109 6110 6111 6112
		DBUG_RETURN(error);
	}

	/* Note that we assume the length of the row reference is fixed
6113
	for the table, and it is == ref_length */
osku's avatar
osku committed
6114 6115 6116 6117

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

	if (error) {
6118
		DBUG_PRINT("error", ("Got error: %d", error));
osku's avatar
osku committed
6119 6120 6121 6122
	}

	change_active_index(keynr);

6123
	DBUG_RETURN(error);
osku's avatar
osku committed
6124 6125
}

6126
/*********************************************************************//**
osku's avatar
osku committed
6127 6128 6129 6130 6131 6132 6133
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. */
6134
UNIV_INTERN
osku's avatar
osku committed
6135 6136 6137
void
ha_innobase::position(
/*==================*/
6138
	const uchar*	record)	/*!< in: row in MySQL format */
osku's avatar
osku committed
6139 6140 6141
{
	uint		len;

6142
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
osku's avatar
osku committed
6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159

	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. */
6160

osku's avatar
osku committed
6161 6162
	if (len != ref_length) {
	  sql_print_error("Stored ref len is %lu, but table ref len is %lu",
6163
			  (ulong) len, (ulong) ref_length);
osku's avatar
osku committed
6164 6165 6166
	}
}

6167 6168 6169 6170 6171 6172
/* 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))

6173
/*****************************************************************//**
osku's avatar
osku committed
6174 6175 6176 6177 6178
Creates a table definition to an InnoDB database. */
static
int
create_table_def(
/*=============*/
6179 6180
	trx_t*		trx,		/*!< in: InnoDB transaction handle */
	TABLE*		form,		/*!< in: information on table
osku's avatar
osku committed
6181
					columns and indexes */
6182 6183
	const char*	table_name,	/*!< in: table name */
	const char*	path_of_temp_table,/*!< in: if this is a table explicitly
osku's avatar
osku committed
6184 6185 6186 6187 6188 6189 6190
					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 */
6191
	ulint		flags)		/*!< in: table flags */
osku's avatar
osku committed
6192 6193 6194 6195
{
	Field*		field;
	dict_table_t*	table;
	ulint		n_cols;
6196 6197
	int		error;
	ulint		col_type;
osku's avatar
osku committed
6198
	ulint		col_len;
6199
	ulint		nulls_allowed;
osku's avatar
osku committed
6200 6201 6202 6203
	ulint		unsigned_type;
	ulint		binary_type;
	ulint		long_true_varchar;
	ulint		charset_no;
6204
	ulint		i;
osku's avatar
osku committed
6205

6206 6207
	DBUG_ENTER("create_table_def");
	DBUG_PRINT("enter", ("table_name: %s", table_name));
osku's avatar
osku committed
6208

6209 6210 6211 6212 6213 6214
	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);
	}

osku's avatar
osku committed
6215 6216 6217 6218 6219
	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 */

6220
	table = dict_mem_table_create(table_name, 0, n_cols, flags);
osku's avatar
osku committed
6221 6222 6223 6224 6225 6226 6227 6228 6229 6230

	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,
6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246
							     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;
		}

osku's avatar
osku committed
6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258
		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;
		}

6259
		charset_no = 0;
osku's avatar
osku committed
6260 6261 6262 6263 6264

		if (dtype_is_string_type(col_type)) {

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

6265 6266 6267 6268 6269
			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,
6270
					MYSQL_ERROR::WARN_LEVEL_WARN,
6271 6272 6273 6274 6275 6276 6277
					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);
			}
osku's avatar
osku committed
6278 6279 6280 6281 6282 6283 6284 6285 6286 6287
		}

		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. */
6288

osku's avatar
osku committed
6289 6290 6291 6292 6293 6294 6295 6296 6297 6298
		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;
			}
		}

6299 6300 6301
		/* First check whether the column to be added has a
		system reserved name. */
		if (dict_col_name_is_reserved(field->field_name)){
6302 6303
			my_error(ER_WRONG_COLUMN_NAME, MYF(0),
				 field->field_name);
6304
err_col:
6305 6306 6307 6308 6309 6310 6311
			dict_mem_table_free(table);
			trx_commit_for_mysql(trx);

			error = DB_ERROR;
			goto error_ret;
		}

6312
		dict_mem_table_add_col(table, table->heap,
6313 6314 6315 6316 6317 6318 6319
			(char*) field->field_name,
			col_type,
			dtype_form_prtype(
				(ulint)field->type()
				| nulls_allowed | unsigned_type
				| binary_type | long_true_varchar,
				charset_no),
6320
			col_len);
osku's avatar
osku committed
6321 6322 6323 6324
	}

	error = row_create_table_for_mysql(table, trx);

6325 6326
	if (error == DB_DUPLICATE_KEY) {
		char buf[100];
6327 6328 6329 6330 6331
		char* buf_end = innobase_convert_identifier(
			buf, sizeof buf - 1, table_name, strlen(table_name),
			trx->mysql_thd, TRUE);

		*buf_end = '\0';
6332 6333 6334
		my_error(ER_TABLE_EXISTS_ERROR, MYF(0), buf);
	}

6335
error_ret:
6336
	error = convert_error_code_to_mysql(error, flags, NULL);
osku's avatar
osku committed
6337 6338 6339 6340

	DBUG_RETURN(error);
}

6341
/*****************************************************************//**
osku's avatar
osku committed
6342 6343 6344 6345 6346
Creates an index in an InnoDB database. */
static
int
create_index(
/*=========*/
6347 6348
	trx_t*		trx,		/*!< in: InnoDB transaction handle */
	TABLE*		form,		/*!< in: information on table
osku's avatar
osku committed
6349
					columns and indexes */
6350 6351 6352
	ulint		flags,		/*!< in: InnoDB table flags */
	const char*	table_name,	/*!< in: table name */
	uint		key_num)	/*!< in: index number */
osku's avatar
osku committed
6353 6354 6355
{
	Field*		field;
	dict_index_t*	index;
6356
	int		error;
osku's avatar
osku committed
6357 6358 6359 6360 6361 6362 6363
	ulint		n_fields;
	KEY*		key;
	KEY_PART_INFO*	key_part;
	ulint		ind_type;
	ulint		col_type;
	ulint		prefix_len;
	ulint		is_unsigned;
6364 6365
	ulint		i;
	ulint		j;
osku's avatar
osku committed
6366
	ulint*		field_lengths;
6367 6368

	DBUG_ENTER("create_index");
osku's avatar
osku committed
6369 6370 6371

	key = form->key_info + key_num;

6372
	n_fields = key->key_parts;
osku's avatar
osku committed
6373

6374 6375 6376
	/* Assert that "GEN_CLUST_INDEX" cannot be used as non-primary index */
	ut_a(innobase_strcasecmp(key->name, innobase_index_reserve_name) != 0);

6377
	ind_type = 0;
osku's avatar
osku committed
6378

6379
	if (key_num == form->s->primary_key) {
osku's avatar
osku committed
6380 6381 6382 6383 6384 6385 6386 6387 6388 6389
		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 */

6390 6391
	index = dict_mem_index_create(table_name, key->name, 0,
				      ind_type, n_fields);
osku's avatar
osku committed
6392 6393 6394

	field_lengths = (ulint*) my_malloc(sizeof(ulint) * n_fields,
		MYF(MY_FAE));
6395

osku's avatar
osku committed
6396 6397 6398 6399 6400 6401 6402 6403
	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. */
6404

osku's avatar
osku committed
6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424
		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
6425 6426 6427 6428 6429
			|| (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)) {
osku's avatar
osku committed
6430

6431
			prefix_len = key_part->length;
osku's avatar
osku committed
6432 6433

			if (col_type == DATA_INT
6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445
				|| 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;
osku's avatar
osku committed
6446 6447
			}
		} else {
6448
			prefix_len = 0;
osku's avatar
osku committed
6449 6450 6451 6452 6453
		}

		field_lengths[i] = key_part->length;

		dict_mem_index_add_field(index,
6454
			(char*) key_part->field->field_name, prefix_len);
osku's avatar
osku committed
6455 6456
	}

6457 6458 6459
	/* 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. */
osku's avatar
osku committed
6460 6461
	error = row_create_index_for_mysql(index, trx, field_lengths);

6462
	error = convert_error_code_to_mysql(error, flags, NULL);
osku's avatar
osku committed
6463

6464
	my_free(field_lengths);
6465

osku's avatar
osku committed
6466 6467 6468
	DBUG_RETURN(error);
}

6469
/*****************************************************************//**
osku's avatar
osku committed
6470 6471 6472 6473 6474 6475
Creates an index to an InnoDB table when the user has defined no
primary index. */
static
int
create_clustered_index_when_no_primary(
/*===================================*/
6476 6477 6478
	trx_t*		trx,		/*!< in: InnoDB transaction handle */
	ulint		flags,		/*!< in: InnoDB table flags */
	const char*	table_name)	/*!< in: table name */
osku's avatar
osku committed
6479 6480
{
	dict_index_t*	index;
6481
	int		error;
osku's avatar
osku committed
6482 6483 6484

	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
6485 6486
	index = dict_mem_index_create(table_name,
				      innobase_index_reserve_name,
6487
				      0, DICT_CLUSTERED, 0);
6488

osku's avatar
osku committed
6489 6490
	error = row_create_index_for_mysql(index, trx, NULL);

6491
	error = convert_error_code_to_mysql(error, flags, NULL);
osku's avatar
osku committed
6492 6493 6494 6495

	return(error);
}

6496
/*****************************************************************//**
6497 6498 6499
Validates the create options. We may build on this function
in future. For now, it checks two specifiers:
KEY_BLOCK_SIZE and ROW_FORMAT
6500 6501
If innodb_strict_mode is not set then this function is a no-op
@return	TRUE if valid. */
6502 6503 6504 6505
static
ibool
create_options_are_valid(
/*=====================*/
6506 6507
	THD*		thd,		/*!< in: connection thread. */
	TABLE*		form,		/*!< in: information on table
6508
					columns and indexes */
6509
	HA_CREATE_INFO*	create_info)	/*!< in: create info. */
6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536 6537 6538
{
	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:
6539
			push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
6540 6541 6542 6543 6544 6545 6546 6547 6548 6549 6550 6551 6552
					    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) {
6553
		push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
6554 6555 6556 6557 6558 6559 6560
			     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) {
6561
		push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579
			     ER_ILLEGAL_HA_CREATE_OPTION,
			     "InnoDB: KEY_BLOCK_SIZE"
			     " requires innodb_file_format >"
			     " Antelope.");
		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";

6580 6581
			/* These two ROW_FORMATs require srv_file_per_table
			and srv_file_format > Antelope */
6582 6583 6584
			if (!srv_file_per_table) {
				push_warning_printf(
					thd,
6585
					MYSQL_ERROR::WARN_LEVEL_WARN,
6586 6587 6588 6589 6590 6591 6592 6593 6594 6595
					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,
6596
					MYSQL_ERROR::WARN_LEVEL_WARN,
6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612
					ER_ILLEGAL_HA_CREATE_OPTION,
					"InnoDB: ROW_FORMAT=%s"
					" requires innodb_file_format >"
					" Antelope.",
					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,
6613
					MYSQL_ERROR::WARN_LEVEL_WARN,
6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636
					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,
6637
					MYSQL_ERROR::WARN_LEVEL_WARN,
6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649
					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,
6650
				     MYSQL_ERROR::WARN_LEVEL_WARN,
6651 6652 6653 6654 6655 6656 6657 6658 6659 6660
				     ER_ILLEGAL_HA_CREATE_OPTION,
				     "InnoDB: invalid ROW_FORMAT specifier.");
			ret = FALSE;

		}
	}

	return(ret);
}

6661
/*****************************************************************//**
6662
Update create_info.  Used in SHOW CREATE TABLE et al. */
6663
UNIV_INTERN
6664 6665 6666
void
ha_innobase::update_create_info(
/*============================*/
6667
	HA_CREATE_INFO* create_info)	/*!< in/out: create info */
6668 6669 6670 6671 6672 6673 6674
{
  if (!(create_info->used_fields & HA_CREATE_USED_AUTO)) {
    ha_innobase::info(HA_STATUS_AUTO);
    create_info->auto_increment_value = stats.auto_increment_value;
  }
}

6675
/*****************************************************************//**
6676 6677
Creates a new table to an InnoDB database.
@return	error number */
6678
UNIV_INTERN
osku's avatar
osku committed
6679 6680 6681
int
ha_innobase::create(
/*================*/
6682 6683
	const char*	name,		/*!< in: table name */
	TABLE*		form,		/*!< in: information on table
osku's avatar
osku committed
6684
					columns and indexes */
6685
	HA_CREATE_INFO*	create_info)	/*!< in: more information of the
osku's avatar
osku committed
6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696
					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];
6697
	THD*		thd = ha_thd();
6698
	ib_int64_t	auto_inc_value;
6699
	ulint		flags;
6700 6701 6702
	/* Cache the value of innodb_file_format, in case it is
	modified by another thread while the table is being created. */
	const ulint	file_format = srv_file_format;
6703 6704
	const char*	stmt;
	size_t		stmt_len;
6705
	enum row_type	row_type;
osku's avatar
osku committed
6706

6707
	DBUG_ENTER("ha_innobase::create");
osku's avatar
osku committed
6708 6709

	DBUG_ASSERT(thd != NULL);
6710 6711 6712 6713 6714 6715 6716
	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

6717 6718
	When srv_file_per_table is on and mysqld_embedded is off,
	check for full path pattern, i.e.
6719 6720 6721 6722 6723 6724
	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
6725
	    && !mysqld_embedded
6726 6727 6728 6729 6730 6731 6732 6733 6734
	    && (!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
osku's avatar
osku committed
6735 6736 6737 6738 6739

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

6740 6741
		DBUG_RETURN(HA_ERR_TO_BIG_ROW);
	}
osku's avatar
osku committed
6742 6743 6744

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
6745

6746
	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
6747 6748 6749 6750

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

6751 6752
	trx_search_latch_release_if_reserved(parent_trx);

6753
	trx = innobase_trx_allocate(thd);
osku's avatar
osku committed
6754 6755 6756 6757 6758 6759 6760

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

6761
	strcpy(name2, name);
osku's avatar
osku committed
6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772

	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 */

6773 6774
	flags = 0;

6775 6776 6777 6778 6779
	/* 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;
	}
6780

6781 6782
	if (create_info->key_block_size
	    || (create_info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE)) {
6783 6784 6785 6786 6787 6788
		/* 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;

6789 6790
		/*  Set 'flags' to the correct key_block_size.
		It will be zero if key_block_size is an invalid number.*/
6791 6792 6793 6794 6795 6796 6797 6798 6799
		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;
			}
6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827
		}

		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;
		}

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

		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);
		}
	}

6828 6829 6830
	row_type = form->s->row_type;

	if (flags) {
6831 6832 6833 6834
		/* 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)) {
6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852
			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 {
6853
		/* flags == 0 means no KEY_BLOCK_SIZE.*/
6854 6855 6856 6857 6858 6859 6860 6861 6862
		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;
6863 6864 6865
#if DICT_TF_ZSSIZE_MAX < 1
# error "DICT_TF_ZSSIZE_MAX < 1"
#endif
6866
		}
6867
	}
6868

6869 6870 6871 6872 6873 6874 6875 6876 6877 6878
	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";
6879

6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900
		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);
6901 6902
			break;
		}
6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913

		/* 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:
6914
		flags = DICT_TF_COMPACT;
6915
		break;
6916 6917
	}

osku's avatar
osku committed
6918 6919
	/* Look for a primary key */

6920
	primary_key_no= (form->s->primary_key != MAX_KEY ?
6921
			 (int) form->s->primary_key :
osku's avatar
osku committed
6922 6923
			 -1);

6924
	/* Our function innobase_get_mysql_key_number_for_index assumes
osku's avatar
osku committed
6925 6926
	the primary key is always number 0, if it exists */

6927
	ut_a(primary_key_no == -1 || primary_key_no == 0);
osku's avatar
osku committed
6928

6929 6930
	/* Check for name conflicts (with reserved name) for
	any user indices to be created. */
6931 6932
	if (innobase_index_name_is_reserved(trx, form->key_info,
					    form->s->keys)) {
6933 6934 6935 6936
		error = -1;
		goto cleanup;
	}

6937 6938 6939 6940
	if (create_info->options & HA_LEX_CREATE_TMP_TABLE) {
		flags |= DICT_TF2_TEMPORARY << DICT_TF2_SHIFT;
	}

6941 6942 6943 6944 6945 6946 6947 6948 6949
	error = create_table_def(trx, form, norm_name,
		create_info->options & HA_LEX_CREATE_TMP_TABLE ? name2 : NULL,
		flags);

	if (error) {
		goto cleanup;
	}


osku's avatar
osku committed
6950 6951 6952 6953 6954 6955 6956
	/* 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 */

6957
		error = create_clustered_index_when_no_primary(
6958
			trx, flags, norm_name);
6959
		if (error) {
osku's avatar
osku committed
6960
			goto cleanup;
6961
		}
osku's avatar
osku committed
6962 6963 6964 6965 6966
	}

	if (primary_key_no != -1) {
		/* In InnoDB the clustered index must always be created
		first */
6967
		if ((error = create_index(trx, form, flags, norm_name,
osku's avatar
osku committed
6968 6969
					  (uint) primary_key_no))) {
			goto cleanup;
6970 6971
		}
	}
osku's avatar
osku committed
6972 6973 6974 6975 6976

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

		if (i != (uint) primary_key_no) {

6977 6978
			if ((error = create_index(trx, form, flags, norm_name,
						  i))) {
osku's avatar
osku committed
6979
				goto cleanup;
6980 6981 6982
			}
		}
	}
osku's avatar
osku committed
6983

6984 6985 6986 6987 6988
	stmt = innobase_get_stmt(thd, &stmt_len);

	if (stmt) {
		error = row_table_add_foreign_constraints(
			trx, stmt, stmt_len, norm_name,
osku's avatar
osku committed
6989 6990
			create_info->options & HA_LEX_CREATE_TMP_TABLE);

6991
		error = convert_error_code_to_mysql(error, flags, NULL);
osku's avatar
osku committed
6992 6993 6994 6995 6996 6997

		if (error) {
			goto cleanup;
		}
	}

6998
	innobase_commit_low(trx);
osku's avatar
osku committed
6999 7000 7001 7002 7003 7004 7005 7006 7007

	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();

7008
	innobase_table = dict_table_get(norm_name, FALSE);
osku's avatar
osku committed
7009 7010 7011

	DBUG_ASSERT(innobase_table != 0);

7012 7013 7014
	if (innobase_table) {
		/* We update the highest file format in the system table
		space, if this table has higher file format setting. */
7015

7016
		trx_sys_file_format_max_upgrade(
7017
			(const char**) &innobase_file_format_max,
7018 7019
			dict_table_get_format(innobase_table));
	}
7020 7021 7022 7023 7024

	/* 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
7025 7026
	this is an ALTER TABLE or CREATE INDEX because CREATE INDEX
	does a table copy too. */
7027 7028

	if (((create_info->used_fields & HA_CREATE_USED_AUTO)
7029 7030 7031 7032 7033 7034 7035 7036 7037 7038 7039 7040
	    || 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. */
osku's avatar
osku committed
7041 7042

		auto_inc_value = create_info->auto_increment_value;
7043 7044

		dict_table_autoinc_lock(innobase_table);
osku's avatar
osku committed
7045
		dict_table_autoinc_initialize(innobase_table, auto_inc_value);
7046
		dict_table_autoinc_unlock(innobase_table);
osku's avatar
osku committed
7047 7048 7049 7050 7051 7052 7053
	}

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

	srv_active_wake_master_thread();

7054
	trx_free_for_mysql(trx);
osku's avatar
osku committed
7055 7056 7057 7058 7059

	DBUG_RETURN(0);

cleanup:
	innobase_commit_low(trx);
7060

osku's avatar
osku committed
7061
	row_mysql_unlock_data_dictionary(trx);
7062

osku's avatar
osku committed
7063 7064 7065 7066 7067
	trx_free_for_mysql(trx);

	DBUG_RETURN(error);
}

7068
/*****************************************************************//**
7069 7070
Discards or imports an InnoDB tablespace.
@return	0 == success, -1 == error */
7071
UNIV_INTERN
osku's avatar
osku committed
7072 7073 7074
int
ha_innobase::discard_or_import_tablespace(
/*======================================*/
7075
	my_bool discard)	/*!< in: TRUE if discard, else import */
osku's avatar
osku committed
7076 7077 7078 7079 7080
{
	dict_table_t*	dict_table;
	trx_t*		trx;
	int		err;

7081
	DBUG_ENTER("ha_innobase::discard_or_import_tablespace");
osku's avatar
osku committed
7082

7083 7084
	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
7085
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
osku's avatar
osku committed
7086 7087 7088 7089 7090 7091 7092 7093 7094 7095

	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);
	}

7096
	err = convert_error_code_to_mysql(err, dict_table->flags, NULL);
osku's avatar
osku committed
7097 7098 7099 7100

	DBUG_RETURN(err);
}

7101
/*****************************************************************//**
7102 7103
Deletes all rows of an InnoDB table.
@return	error number */
7104
UNIV_INTERN
osku's avatar
osku committed
7105
int
7106
ha_innobase::truncate(void)
osku's avatar
osku committed
7107 7108 7109 7110
/*==============================*/
{
	int		error;

7111
	DBUG_ENTER("ha_innobase::truncate");
osku's avatar
osku committed
7112

7113 7114 7115 7116 7117
	/* Get the transaction associated with the current thd, or create one
	if not yet created, and update prebuilt->trx */

	update_thd(ha_thd());

osku's avatar
osku committed
7118 7119
	/* Truncate the table in InnoDB */

7120
	error = row_truncate_table_for_mysql(prebuilt->table, prebuilt->trx);
osku's avatar
osku committed
7121

7122 7123
	error = convert_error_code_to_mysql(error, prebuilt->table->flags,
					    NULL);
osku's avatar
osku committed
7124 7125 7126 7127

	DBUG_RETURN(error);
}

7128
/*****************************************************************//**
osku's avatar
osku committed
7129 7130 7131 7132
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
7133 7134
inside InnoDB.
@return	error number */
7135
UNIV_INTERN
osku's avatar
osku committed
7136 7137 7138
int
ha_innobase::delete_table(
/*======================*/
7139
	const char*	name)	/*!< in: table name */
osku's avatar
osku committed
7140 7141 7142 7143 7144
{
	ulint	name_len;
	int	error;
	trx_t*	parent_trx;
	trx_t*	trx;
7145
	THD	*thd = ha_thd();
osku's avatar
osku committed
7146 7147
	char	norm_name[1000];

7148
	DBUG_ENTER("ha_innobase::delete_table");
osku's avatar
osku committed
7149

7150 7151 7152 7153 7154 7155 7156 7157
	/* 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);
	}

osku's avatar
osku committed
7158 7159
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7160

7161
	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
7162 7163 7164 7165

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

7166
	trx_search_latch_release_if_reserved(parent_trx);
osku's avatar
osku committed
7167

7168 7169
	trx = innobase_trx_allocate(thd);

osku's avatar
osku committed
7170 7171 7172 7173 7174 7175 7176 7177
	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

	name_len = strlen(name);

7178
	ut_a(name_len < 1000);
osku's avatar
osku committed
7179

7180
	/* Drop the table in InnoDB */
osku's avatar
osku committed
7181 7182

	error = row_drop_table_for_mysql(norm_name, trx,
7183 7184
					 thd_sql_command(thd)
					 == SQLCOM_DROP_DB);
osku's avatar
osku committed
7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196

	/* 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();

7197
	innobase_commit_low(trx);
osku's avatar
osku committed
7198

7199
	trx_free_for_mysql(trx);
osku's avatar
osku committed
7200

7201
	error = convert_error_code_to_mysql(error, 0, NULL);
osku's avatar
osku committed
7202 7203 7204 7205

	DBUG_RETURN(error);
}

7206
/*****************************************************************//**
osku's avatar
osku committed
7207
Removes all tables in the named database inside InnoDB. */
7208
static
osku's avatar
osku committed
7209
void
osku's avatar
osku committed
7210 7211
innobase_drop_database(
/*===================*/
7212 7213
	handlerton *hton, /*!< in: handlerton of Innodb */
	char*	path)	/*!< in: database path; inside InnoDB the name
osku's avatar
osku committed
7214 7215 7216 7217 7218 7219 7220 7221
			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;
7222
	THD*	thd		= current_thd;
osku's avatar
osku committed
7223 7224 7225

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7226

7227 7228
	DBUG_ASSERT(hton == innodb_hton_ptr);

7229 7230 7231
	/* In the Windows plugin, thd = current_thd is always NULL */
	if (thd) {
		trx_t*	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
7232

7233 7234 7235
		/* In case MySQL calls this in the middle of a SELECT
		query, release possible adaptive hash latch to avoid
		deadlocks of threads */
osku's avatar
osku committed
7236

7237 7238
		trx_search_latch_release_if_reserved(parent_trx);
	}
osku's avatar
osku committed
7239 7240 7241 7242 7243 7244 7245 7246 7247

	ptr = strend(path) - 2;

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

	ptr++;
7248
	namebuf = (char*) my_malloc((uint) len + 2, MYF(0));
osku's avatar
osku committed
7249 7250 7251 7252

	memcpy(namebuf, ptr, len);
	namebuf[len] = '/';
	namebuf[len + 1] = '\0';
7253
#ifdef	__WIN__
osku's avatar
osku committed
7254 7255
	innobase_casedn_str(namebuf);
#endif
7256 7257
#if defined __WIN__ && !defined MYSQL_SERVER
	/* In the Windows plugin, thd = current_thd is always NULL */
osku's avatar
osku committed
7258
	trx = trx_allocate_for_mysql();
7259 7260 7261 7262
	trx->mysql_thd = NULL;
#else
	trx = innobase_trx_allocate(thd);
#endif
7263
	row_drop_database_for_mysql(namebuf, trx);
7264
	my_free(namebuf);
osku's avatar
osku committed
7265 7266 7267 7268 7269 7270 7271 7272 7273 7274 7275 7276

	/* 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();

7277 7278
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
osku's avatar
osku committed
7279
}
7280
/*********************************************************************//**
7281 7282
Renames an InnoDB table.
@return	0 or error code */
7283 7284 7285 7286
static
int
innobase_rename_table(
/*==================*/
7287 7288 7289
	trx_t*		trx,	/*!< in: transaction */
	const char*	from,	/*!< in: old name of the table */
	const char*	to,	/*!< in: new name of the table */
7290
	ibool		lock_and_commit)
7291
				/*!< in: TRUE=lock data dictionary and commit */
7292 7293 7294 7295 7296 7297 7298 7299 7300 7301 7302 7303 7304 7305 7306
{
	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));

7307 7308
	normalize_table_name(norm_to, to);
	normalize_table_name(norm_from, from);
7309 7310 7311 7312

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

7313 7314 7315
	if (lock_and_commit) {
		row_mysql_lock_data_dictionary(trx);
	}
7316 7317

	error = row_rename_table_for_mysql(
7318
		norm_from, norm_to, trx, lock_and_commit);
7319 7320 7321 7322

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

7323 7324
		fputs("InnoDB: Renaming table ", ef);
		ut_print_name(ef, trx, TRUE, norm_from);
7325
		fputs(" to ", ef);
7326
		ut_print_name(ef, trx, TRUE, norm_to);
7327 7328 7329
		fputs(" failed!\n", ef);
	}

7330 7331
	if (lock_and_commit) {
		row_mysql_unlock_data_dictionary(trx);
7332

7333 7334 7335
		/* 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 */
7336

7337 7338
		log_buffer_flush_to_disk();
	}
osku's avatar
osku committed
7339

7340 7341
	my_free(norm_to);
	my_free(norm_from);
7342 7343 7344

	return error;
}
7345
/*********************************************************************//**
7346 7347
Renames an InnoDB table.
@return	0 or error code */
7348
UNIV_INTERN
osku's avatar
osku committed
7349 7350 7351
int
ha_innobase::rename_table(
/*======================*/
7352 7353
	const char*	from,	/*!< in: old name of the table */
	const char*	to)	/*!< in: new name of the table */
osku's avatar
osku committed
7354
{
7355
	trx_t*	trx;
osku's avatar
osku committed
7356 7357
	int	error;
	trx_t*	parent_trx;
7358
	THD*	thd		= ha_thd();
osku's avatar
osku committed
7359

7360
	DBUG_ENTER("ha_innobase::rename_table");
osku's avatar
osku committed
7361 7362 7363

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
7364

7365
	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
7366 7367 7368 7369

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

7370
	trx_search_latch_release_if_reserved(parent_trx);
osku's avatar
osku committed
7371

7372
	trx = innobase_trx_allocate(thd);
osku's avatar
osku committed
7373

7374
	error = innobase_rename_table(trx, from, to, TRUE);
osku's avatar
osku committed
7375 7376 7377 7378 7379 7380

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

	srv_active_wake_master_thread();

7381 7382
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
osku's avatar
osku committed
7383

7384 7385 7386 7387 7388 7389 7390 7391 7392 7393 7394 7395 7396 7397 7398 7399 7400 7401
	/* 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;
	}

7402
	error = convert_error_code_to_mysql(error, 0, NULL);
osku's avatar
osku committed
7403 7404 7405 7406

	DBUG_RETURN(error);
}

7407
/*********************************************************************//**
7408 7409
Estimates the number of index records in a range.
@return	estimated number of rows */
7410
UNIV_INTERN
osku's avatar
osku committed
7411 7412 7413
ha_rows
ha_innobase::records_in_range(
/*==========================*/
7414 7415
	uint			keynr,		/*!< in: index number */
	key_range		*min_key,	/*!< in: start key value of the
7416
						   range, may also be 0 */
7417
	key_range		*max_key)	/*!< in: range end key val, may
7418
						   also be 0 */
osku's avatar
osku committed
7419 7420 7421
{
	KEY*		key;
	dict_index_t*	index;
7422
	uchar*		key_val_buff2	= (uchar*) my_malloc(
osku's avatar
osku committed
7423
						  table->s->reclength
7424
					+ table->s->max_key_length + 100,
osku's avatar
osku committed
7425 7426
								MYF(MY_FAE));
	ulint		buff2_len = table->s->reclength
7427
					+ table->s->max_key_length + 100;
osku's avatar
osku committed
7428 7429
	dtuple_t*	range_start;
	dtuple_t*	range_end;
7430
	ib_int64_t	n_rows;
osku's avatar
osku committed
7431 7432
	ulint		mode1;
	ulint		mode2;
7433
	mem_heap_t*	heap;
osku's avatar
osku committed
7434

7435
	DBUG_ENTER("records_in_range");
osku's avatar
osku committed
7436

7437
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
7438

osku's avatar
osku committed
7439 7440 7441 7442 7443 7444 7445 7446 7447 7448 7449
	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;

7450
	index = innobase_get_index(keynr);
7451

7452 7453 7454 7455 7456 7457 7458
	/* 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;
	}
7459 7460 7461 7462
	if (UNIV_UNLIKELY(!row_merge_is_index_usable(prebuilt->trx, index))) {
		n_rows = HA_ERR_TABLE_DEF_CHANGED;
		goto func_exit;
	}
osku's avatar
osku committed
7463

7464 7465 7466 7467
	heap = mem_heap_create(2 * (key->key_parts * sizeof(dfield_t)
				    + sizeof(dtuple_t)));

	range_start = dtuple_create(heap, key->key_parts);
7468
	dict_index_copy_types(range_start, index, key->key_parts);
osku's avatar
osku committed
7469

7470
	range_end = dtuple_create(heap, key->key_parts);
7471
	dict_index_copy_types(range_end, index, key->key_parts);
osku's avatar
osku committed
7472 7473 7474 7475 7476 7477

	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 :
7478
					 (const uchar*) 0),
osku's avatar
osku committed
7479 7480 7481 7482 7483 7484 7485
				(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 :
7486
					 (const uchar*) 0),
osku's avatar
osku committed
7487 7488 7489 7490
				(ulint) (max_key ? max_key->length : 0),
				prebuilt->trx);

	mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag :
7491
						HA_READ_KEY_EXACT);
osku's avatar
osku committed
7492
	mode2 = convert_search_mode_to_innobase(max_key ? max_key->flag :
7493
						HA_READ_KEY_EXACT);
osku's avatar
osku committed
7494

7495 7496 7497 7498 7499 7500 7501
	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 {

7502
		n_rows = HA_POS_ERROR;
7503 7504
	}

7505
	mem_heap_free(heap);
osku's avatar
osku committed
7506

7507
func_exit:
7508
	my_free(key_val_buff2);
osku's avatar
osku committed
7509 7510 7511 7512 7513 7514 7515 7516 7517 7518

	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) {
7519
		n_rows = 1;
osku's avatar
osku committed
7520 7521 7522 7523 7524
	}

	DBUG_RETURN((ha_rows) n_rows);
}

7525
/*********************************************************************//**
osku's avatar
osku committed
7526
Gives an UPPER BOUND to the number of rows in a table. This is used in
7527 7528
filesort.cc.
@return	upper bound of rows */
7529
UNIV_INTERN
osku's avatar
osku committed
7530 7531 7532 7533 7534 7535 7536 7537
ha_rows
ha_innobase::estimate_rows_upper_bound(void)
/*======================================*/
{
	dict_index_t*	index;
	ulonglong	estimate;
	ulonglong	local_data_file_length;

7538
	DBUG_ENTER("estimate_rows_upper_bound");
osku's avatar
osku committed
7539 7540 7541 7542 7543

	/* 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. */

7544
	update_thd(ha_thd());
osku's avatar
osku committed
7545 7546

	prebuilt->trx->op_info = (char*)
7547
				 "calculating upper bound for table rows";
osku's avatar
osku committed
7548 7549 7550 7551 7552 7553

	/* 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);

7554
	index = dict_table_get_first_index(prebuilt->table);
osku's avatar
osku committed
7555

7556 7557 7558 7559 7560
	ut_a(index->stat_n_leaf_pages > 0);

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

osku's avatar
osku committed
7561 7562 7563 7564 7565 7566 7567 7568 7569 7570 7571 7572 7573 7574

	/* 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);
}

7575
/*********************************************************************//**
osku's avatar
osku committed
7576 7577
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
7578 7579
decide if we should scan the table or use keys.
@return	estimated time measured in disk seeks */
7580
UNIV_INTERN
osku's avatar
osku committed
7581 7582 7583 7584 7585 7586 7587 7588
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. */
7589

osku's avatar
osku committed
7590 7591 7592
	return((double) (prebuilt->table->stat_clustered_index_size));
}

7593
/******************************************************************//**
osku's avatar
osku committed
7594
Calculate the time it takes to read a set of ranges through an index
7595 7596
This enables us to optimise reads for clustered indexes.
@return	estimated time measured in disk seeks */
7597
UNIV_INTERN
osku's avatar
osku committed
7598 7599 7600
double
ha_innobase::read_time(
/*===================*/
7601 7602 7603
	uint	index,	/*!< in: key number */
	uint	ranges,	/*!< in: how many ranges */
	ha_rows rows)	/*!< in: estimated number of rows in the ranges */
osku's avatar
osku committed
7604 7605
{
	ha_rows total_rows;
7606 7607
	double	time_for_scan;

osku's avatar
osku committed
7608
	if (index != table->s->primary_key) {
7609 7610
		/* Not clustered */
		return(handler::read_time(index, ranges, rows));
osku's avatar
osku committed
7611 7612 7613 7614 7615 7616 7617 7618 7619 7620 7621 7622 7623 7624
	}

	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) {

7625
		return(time_for_scan);
osku's avatar
osku committed
7626 7627 7628 7629 7630
	}

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

7631 7632 7633 7634 7635 7636 7637 7638 7639 7640 7641 7642 7643 7644 7645 7646 7647 7648 7649 7650 7651 7652 7653 7654 7655 7656 7657 7658
/*********************************************************************//**
Calculates the key number used inside MySQL for an Innobase index. We will
first check the "index translation table" for a match of the index to get
the index number. If there does not exist an "index translation table",
or not able to find the index in the translation table, then we will fall back
to the traditional way of looping through dict_index_t list to find a
match. In this case, we have to take into account if we generated a
default clustered index for the table
@return the key number used inside MySQL */
static
unsigned int
innobase_get_mysql_key_number_for_index(
/*====================================*/
	INNOBASE_SHARE*		share,	/*!< in: share structure for index
					translation table. */
	const TABLE*		table,	/*!< in: table in MySQL data
					dictionary */
	dict_table_t*		ib_table,/*!< in: table in Innodb data
					dictionary */
        const dict_index_t*     index)	/*!< in: index */
{
	const dict_index_t*	ind;
	unsigned int		i;

        ut_a(index);

	/* If index does not belong to the table of share structure. Search
	index->table instead */
7659
	if (index->table != ib_table) {
7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677 7678 7679 7680 7681 7682 7683 7684 7685 7686 7687 7688 7689 7690 7691 7692 7693 7694 7695 7696 7697 7698 7699 7700 7701 7702 7703 7704 7705 7706 7707
		i = 0;
		ind = dict_table_get_first_index(index->table);

		while (index != ind) {
			ind = dict_table_get_next_index(ind);
			i++;
		}

		if (row_table_got_default_clust_index(index->table)) {
			ut_a(i > 0);
			i--;
		}

		return(i);
	}

	/* If index translation table exists, we will first check
	the index through index translation table for a match. */
        if (share->idx_trans_tbl.index_mapping) {
		for (i = 0; i < share->idx_trans_tbl.index_count; i++) {
			if (share->idx_trans_tbl.index_mapping[i] == index) {
				return(i);
			}
		}

		/* Print an error message if we cannot find the index
		** in the "index translation table". */
		sql_print_error("Cannot find index %s in InnoDB index "
				"translation table.", index->name);
	}

	/* If we do not have an "index translation table", or not able
	to find the index in the translation table, we'll directly find
	matching index with information from mysql TABLE structure and
	InnoDB dict_index_t list */
	for (i = 0; i < table->s->keys; i++) {
		ind = dict_table_get_index_on_name(
			ib_table, table->key_info[i].name);

		if (index == ind) {
			return(i);
		}
        }

	ut_error;

        return(0);
}
7708
/*********************************************************************//**
osku's avatar
osku committed
7709 7710
Returns statistics information of the table to the MySQL interpreter,
in various fields of the handle object. */
7711
UNIV_INTERN
7712
int
7713 7714
ha_innobase::info_low(
/*==================*/
7715
	uint	flag,			/*!< in: what information MySQL
7716 7717 7718
					requests */
	bool	called_from_analyze)	/* in: TRUE if called from
					::analyze() */
osku's avatar
osku committed
7719 7720 7721 7722
{
	dict_table_t*	ib_table;
	dict_index_t*	index;
	ha_rows		rec_per_key;
7723
	ib_int64_t	n_rows;
osku's avatar
osku committed
7724
	char		path[FN_REFLEN];
7725
	os_file_stat_t	stat_info;
osku's avatar
osku committed
7726

7727
	DBUG_ENTER("info");
osku's avatar
osku committed
7728

7729
	/* If we are forcing recovery at a high level, we will suppress
osku's avatar
osku committed
7730 7731 7732 7733 7734 7735 7736
	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. */

7737
	update_thd(ha_thd());
osku's avatar
osku committed
7738 7739 7740 7741 7742 7743 7744 7745

	/* 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);

7746
	ib_table = prebuilt->table;
osku's avatar
osku committed
7747

7748
	if (flag & HA_STATUS_TIME) {
7749
		if (called_from_analyze || innobase_stats_on_metadata) {
7750 7751
			/* In sql_show we call with this flag: update
			then statistics so that they are up-to-date */
osku's avatar
osku committed
7752

7753
			prebuilt->trx->op_info = "updating table statistics";
osku's avatar
osku committed
7754

7755
			dict_update_statistics(ib_table);
osku's avatar
osku committed
7756

7757
			prebuilt->trx->op_info = "returning various info to MySQL";
7758
		}
osku's avatar
osku committed
7759

7760
		my_snprintf(path, sizeof(path), "%s/%s%s",
7761 7762
				mysql_data_home, ib_table->name, reg_ext);

7763
		unpack_filename(path,path);
osku's avatar
osku committed
7764

7765
		/* Note that we do not know the access time of the table,
osku's avatar
osku committed
7766 7767 7768
		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */

		if (os_file_get_status(path,&stat_info)) {
7769
			stats.create_time = (ulong) stat_info.ctime;
osku's avatar
osku committed
7770
		}
7771
	}
osku's avatar
osku committed
7772 7773 7774 7775 7776 7777 7778 7779 7780 7781 7782 7783 7784 7785 7786 7787 7788 7789 7790 7791 7792 7793 7794 7795 7796

	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++;
		}

7797 7798 7799 7800
		/* 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. */
7801 7802
		if (thd_sql_command(user_thd) == SQLCOM_TRUNCATE) {

7803
			n_rows = 1;
7804 7805 7806 7807 7808 7809 7810

			/* 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. */

7811
			prebuilt->autoinc_last_value = 0;
7812 7813
		}

7814 7815 7816
		stats.records = (ha_rows)n_rows;
		stats.deleted = 0;
		stats.data_file_length = ((ulonglong)
osku's avatar
osku committed
7817
				ib_table->stat_clustered_index_size)
7818
					* UNIV_PAGE_SIZE;
7819
		stats.index_file_length = ((ulonglong)
osku's avatar
osku committed
7820
				ib_table->stat_sum_of_other_index_sizes)
7821
					* UNIV_PAGE_SIZE;
7822 7823 7824 7825 7826

		/* 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.
7827 7828 7829 7830 7831 7832 7833 7834 7835 7836 7837 7838
		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 {
7839 7840 7841 7842 7843 7844 7845 7846 7847 7848 7849 7850 7851
			/* 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 {

7852 7853 7854 7855 7856 7857 7858 7859 7860 7861 7862 7863 7864 7865 7866
				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);

7867 7868 7869 7870
				stats.delete_length = 0;
			}

			row_mysql_unlock_data_dictionary(prebuilt->trx);
7871 7872
		}

7873
		stats.check_time = 0;
osku's avatar
osku committed
7874

7875 7876
		if (stats.records == 0) {
			stats.mean_rec_length = 0;
7877
		} else {
7878
			stats.mean_rec_length = (ulong) (stats.data_file_length / stats.records);
7879 7880
		}
	}
osku's avatar
osku committed
7881 7882

	if (flag & HA_STATUS_CONST) {
7883
		ulong	i;
7884 7885 7886 7887 7888 7889 7890 7891 7892 7893 7894 7895 7896
		/* 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);
osku's avatar
osku committed
7897 7898 7899
		}

		for (i = 0; i < table->s->keys; i++) {
7900
			ulong	j;
7901 7902 7903 7904 7905 7906 7907
			/* 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);

osku's avatar
osku committed
7908
			if (index == NULL) {
7909
				sql_print_error("Table %s contains fewer "
osku's avatar
osku committed
7910 7911 7912 7913
						"indexes inside InnoDB than "
						"are defined in the MySQL "
						".frm file. Have you mixed up "
						".frm files from different "
7914
						"installations? See "
7915 7916
						REFMAN
						"innodb-troubleshooting.html\n",
osku's avatar
osku committed
7917 7918 7919 7920 7921 7922 7923
						ib_table->name);
				break;
			}

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

				if (j + 1 > index->n_uniq) {
7924 7925 7926 7927
					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? "
7928
"See " REFMAN "innodb-troubleshooting.html\n",
osku's avatar
osku committed
7929 7930 7931 7932
							index->name,
							ib_table->name,
							(unsigned long)
							index->n_uniq, j + 1);
7933
					break;
osku's avatar
osku committed
7934 7935
				}

Vasil Dimov's avatar
Vasil Dimov committed
7936 7937
				dict_index_stat_mutex_enter(index);

osku's avatar
osku committed
7938 7939
				if (index->stat_n_diff_key_vals[j + 1] == 0) {

7940
					rec_per_key = stats.records;
osku's avatar
osku committed
7941
				} else {
7942
					rec_per_key = (ha_rows)(stats.records /
7943
					 index->stat_n_diff_key_vals[j + 1]);
osku's avatar
osku committed
7944 7945
				}

Vasil Dimov's avatar
Vasil Dimov committed
7946 7947
				dict_index_stat_mutex_exit(index);

osku's avatar
osku committed
7948 7949 7950 7951 7952 7953 7954 7955 7956 7957 7958
				/* 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;
				}

7959
				table->key_info[i].rec_per_key[j]=
osku's avatar
osku committed
7960
				  rec_per_key >= ~(ulong) 0 ? ~(ulong) 0 :
7961
				  (ulong) rec_per_key;
osku's avatar
osku committed
7962 7963 7964 7965
			}
		}
	}

7966 7967 7968 7969 7970
	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {

		goto func_exit;
	}

7971
	if (flag & HA_STATUS_ERRKEY) {
marko's avatar
marko committed
7972
		const dict_index_t*	err_index;
7973

7974 7975
		ut_a(prebuilt->trx);
		ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
osku's avatar
osku committed
7976

marko's avatar
marko committed
7977
		err_index = trx_get_error_info(prebuilt->trx);
7978 7979

		if (err_index) {
7980 7981
			errkey = innobase_get_mysql_key_number_for_index(
					share, table, ib_table, err_index);
7982 7983 7984
		} else {
			errkey = (unsigned int) prebuilt->trx->error_key_num;
		}
7985
	}
osku's avatar
osku committed
7986

7987 7988
	if ((flag & HA_STATUS_AUTO) && table->found_next_number_field) {
		stats.auto_increment_value = innobase_peek_autoinc();
osku's avatar
osku committed
7989 7990
	}

7991
func_exit:
osku's avatar
osku committed
7992 7993
	prebuilt->trx->op_info = (char*)"";

7994
	DBUG_RETURN(0);
osku's avatar
osku committed
7995 7996
}

7997
/*********************************************************************//**
7998 7999
Returns statistics information of the table to the MySQL interpreter,
in various fields of the handle object. */
8000
UNIV_INTERN
8001 8002 8003
int
ha_innobase::info(
/*==============*/
8004
	uint	flag)	/*!< in: what information MySQL requests */
8005 8006 8007 8008
{
	return(info_low(flag, false /* not called from analyze */));
}

8009
/**********************************************************************//**
osku's avatar
osku committed
8010
Updates index cardinalities of the table, based on 8 random dives into
8011 8012
each index tree. This does NOT calculate exact statistics on the table.
@return	returns always 0 (success) */
8013
UNIV_INTERN
osku's avatar
osku committed
8014 8015
int
ha_innobase::analyze(
8016
/*=================*/
8017 8018
	THD*		thd,		/*!< in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: currently ignored */
osku's avatar
osku committed
8019 8020
{
	/* Simply call ::info() with all the flags */
8021 8022
	info_low(HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE,
		 true /* called from analyze */);
osku's avatar
osku committed
8023 8024 8025 8026

	return(0);
}

8027
/**********************************************************************//**
8028
This is mapped to "ALTER TABLE tablename ENGINE=InnoDB", which rebuilds
osku's avatar
osku committed
8029
the table in MySQL. */
8030
UNIV_INTERN
osku's avatar
osku committed
8031 8032 8033
int
ha_innobase::optimize(
/*==================*/
8034 8035
	THD*		thd,		/*!< in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: currently ignored */
osku's avatar
osku committed
8036
{
8037
	return(HA_ADMIN_TRY_ALTER);
osku's avatar
osku committed
8038 8039
}

8040
/*******************************************************************//**
osku's avatar
osku committed
8041 8042
Tries to check that an InnoDB table is not corrupted. If corruption is
noticed, prints to stderr information about it. In case of corruption
8043 8044
may also assert a failure and crash the server.
@return	HA_ADMIN_CORRUPT or HA_ADMIN_OK */
8045
UNIV_INTERN
osku's avatar
osku committed
8046 8047 8048
int
ha_innobase::check(
/*===============*/
8049 8050
	THD*		thd,		/*!< in: user thread handle */
	HA_CHECK_OPT*	check_opt)	/*!< in: check options, currently
osku's avatar
osku committed
8051 8052
					ignored */
{
8053 8054 8055 8056 8057
	dict_index_t*	index;
	ulint		n_rows;
	ulint		n_rows_in_table	= ULINT_UNDEFINED;
	ibool		is_ok		= TRUE;
	ulint		old_isolation_level;
osku's avatar
osku committed
8058

8059
	DBUG_ENTER("ha_innobase::check");
8060
	DBUG_ASSERT(thd == ha_thd());
8061 8062
	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
8063
	ut_a(prebuilt->trx == thd_to_trx(thd));
osku's avatar
osku committed
8064 8065 8066 8067 8068 8069 8070 8071

	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);
	}

8072 8073 8074 8075 8076 8077 8078 8079 8080 8081 8082 8083 8084 8085 8086 8087 8088
	if (prebuilt->table->ibd_file_missing) {
		sql_print_error("InnoDB: Error:\n"
			"InnoDB: MySQL is trying to use a table handle"
			" but the .ibd file for\n"
			"InnoDB: table %s does not exist.\n"
			"InnoDB: Have you deleted the .ibd file"
			" from the database directory under\n"
			"InnoDB: the MySQL datadir, or have you"
			" used DISCARD TABLESPACE?\n"
			"InnoDB: Please refer to\n"
			"InnoDB: " REFMAN "innodb-troubleshooting.html\n"
			"InnoDB: how you can resolve the problem.\n",
			prebuilt->table->name);
		DBUG_RETURN(HA_ADMIN_CORRUPT);
	}

	prebuilt->trx->op_info = "checking table";
osku's avatar
osku committed
8089

8090 8091 8092 8093 8094 8095 8096 8097 8098 8099 8100 8101 8102 8103 8104 8105 8106 8107 8108 8109 8110 8111 8112 8113 8114 8115 8116 8117 8118 8119 8120 8121 8122 8123 8124 8125 8126 8127 8128 8129 8130 8131 8132 8133 8134 8135 8136 8137 8138 8139 8140 8141 8142 8143 8144 8145 8146 8147 8148 8149 8150 8151 8152 8153 8154 8155 8156 8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171 8172 8173 8174 8175 8176 8177 8178 8179 8180 8181 8182 8183 8184 8185 8186 8187 8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201
	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)) {
8202
		my_error(ER_QUERY_INTERRUPTED, MYF(0));
osku's avatar
osku committed
8203
	}
8204 8205

	DBUG_RETURN(is_ok ? HA_ADMIN_OK : HA_ADMIN_CORRUPT);
osku's avatar
osku committed
8206 8207
}

8208
/*************************************************************//**
osku's avatar
osku committed
8209 8210
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
8211 8212
foreign keys.
@return	table comment + InnoDB free space + info on foreign keys */
8213
UNIV_INTERN
osku's avatar
osku committed
8214 8215 8216
char*
ha_innobase::update_table_comment(
/*==============================*/
8217
	const char*	comment)/*!< in: table comment defined by user */
osku's avatar
osku committed
8218
{
8219 8220
	uint	length = (uint) strlen(comment);
	char*	str;
8221
	long	flen;
osku's avatar
osku committed
8222 8223 8224 8225 8226 8227 8228 8229 8230

	/* 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 */
	}

8231
	update_thd(ha_thd());
osku's avatar
osku committed
8232 8233 8234 8235 8236 8237 8238 8239 8240

	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;

8241
	/* output the data to a temporary file */
osku's avatar
osku committed
8242

8243
	mutex_enter(&srv_dict_tmpfile_mutex);
8244 8245
	rewind(srv_dict_tmpfile);

8246 8247 8248
	fprintf(srv_dict_tmpfile, "InnoDB free: %llu kB",
		fsp_get_available_space_in_free_extents(
			prebuilt->table->space));
osku's avatar
osku committed
8249

8250
	dict_print_info_on_foreign_keys(FALSE, srv_dict_tmpfile,
osku's avatar
osku committed
8251
				prebuilt->trx, prebuilt->table);
8252 8253 8254 8255 8256 8257
	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	} else if (length + flen + 3 > 64000) {
		flen = 64000 - 3 - length;
	}
osku's avatar
osku committed
8258

8259 8260
	/* allocate buffer for the full string, and
	read the contents of the temporary file */
osku's avatar
osku committed
8261

8262
	str = (char*) my_malloc(length + flen + 3, MYF(0));
osku's avatar
osku committed
8263

8264 8265 8266 8267 8268 8269
	if (str) {
		char* pos	= str + length;
		if (length) {
			memcpy(str, comment, length);
			*pos++ = ';';
			*pos++ = ' ';
osku's avatar
osku committed
8270
		}
8271 8272 8273
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(pos, 1, flen, srv_dict_tmpfile);
		pos[flen] = 0;
osku's avatar
osku committed
8274 8275
	}

8276
	mutex_exit(&srv_dict_tmpfile_mutex);
8277

8278
	prebuilt->trx->op_info = (char*)"";
osku's avatar
osku committed
8279

8280
	return(str ? str : (char*) comment);
osku's avatar
osku committed
8281 8282
}

8283
/*******************************************************************//**
8284
Gets the foreign key create info for a table stored in InnoDB.
8285 8286 8287
@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 */
8288
UNIV_INTERN
osku's avatar
osku committed
8289 8290 8291 8292 8293
char*
ha_innobase::get_foreign_key_create_info(void)
/*==========================================*/
{
	char*	str	= 0;
8294
	long	flen;
osku's avatar
osku committed
8295 8296 8297 8298 8299 8300 8301

	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. */

8302
	update_thd(ha_thd());
osku's avatar
osku committed
8303

8304
	prebuilt->trx->op_info = (char*)"getting info on foreign keys";
osku's avatar
osku committed
8305

8306 8307 8308
	/* In case MySQL calls this in the middle of a SELECT query,
	release possible adaptive hash latch to avoid
	deadlocks of threads */
osku's avatar
osku committed
8309

8310
	trx_search_latch_release_if_reserved(prebuilt->trx);
osku's avatar
osku committed
8311

8312
	mutex_enter(&srv_dict_tmpfile_mutex);
8313
	rewind(srv_dict_tmpfile);
osku's avatar
osku committed
8314

8315 8316
	/* output the data to a temporary file */
	dict_print_info_on_foreign_keys(TRUE, srv_dict_tmpfile,
osku's avatar
osku committed
8317
				prebuilt->trx, prebuilt->table);
8318
	prebuilt->trx->op_info = (char*)"";
osku's avatar
osku committed
8319

8320 8321 8322 8323
	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	}
osku's avatar
osku committed
8324

8325 8326
	/* allocate buffer for the string, and
	read the contents of the temporary file */
osku's avatar
osku committed
8327

8328
	str = (char*) my_malloc(flen + 1, MYF(0));
osku's avatar
osku committed
8329

8330 8331 8332 8333
	if (str) {
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(str, 1, flen, srv_dict_tmpfile);
		str[flen] = 0;
osku's avatar
osku committed
8334 8335
	}

8336
	mutex_exit(&srv_dict_tmpfile_mutex);
8337

8338
	return(str);
osku's avatar
osku committed
8339 8340 8341
}


8342 8343 8344 8345 8346 8347 8348 8349 8350 8351 8352 8353 8354 8355 8356 8357 8358 8359 8360 8361 8362 8363 8364 8365 8366 8367 8368 8369 8370 8371 8372 8373 8374 8375 8376 8377 8378 8379 8380 8381 8382 8383 8384 8385 8386 8387 8388 8389 8390 8391 8392 8393 8394 8395 8396 8397 8398 8399 8400 8401 8402 8403 8404 8405 8406 8407 8408 8409 8410 8411 8412 8413 8414 8415 8416 8417 8418 8419 8420 8421 8422 8423 8424 8425 8426 8427 8428 8429 8430 8431 8432 8433 8434 8435 8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449 8450 8451 8452 8453 8454 8455 8456 8457 8458 8459 8460 8461 8462 8463
/***********************************************************************//**
Maps a InnoDB foreign key constraint to a equivalent MySQL foreign key info.
@return pointer to foreign key info */
static
FOREIGN_KEY_INFO*
get_foreign_key_info(
/*=================*/
	THD*			thd,		/*!< in: user thread handle */
	dict_foreign_t*		foreign)	/*!< in: foreign key constraint */
{
	FOREIGN_KEY_INFO	f_key_info;
	FOREIGN_KEY_INFO*	pf_key_info;
	uint			i = 0;
	ulint			len;
	char			tmp_buff[NAME_LEN+1];
	char			name_buff[NAME_LEN+1];
	const char*		ptr;
	LEX_STRING*		referenced_key_name;
	LEX_STRING*		name = NULL;

	ptr = dict_remove_db_name(foreign->id);
	f_key_info.foreign_id = thd_make_lex_string(thd, 0, ptr,
						    (uint) strlen(ptr), 1);

	/* Name format: database name, '/', table name, '\0' */

	/* Referenced (parent) database name */
	len = dict_get_db_name_len(foreign->referenced_table_name);
	ut_a(len < sizeof(tmp_buff));
	ut_memcpy(tmp_buff, foreign->referenced_table_name, len);
	tmp_buff[len] = 0;

	len = filename_to_tablename(tmp_buff, name_buff, sizeof(name_buff));
	f_key_info.referenced_db = thd_make_lex_string(thd, 0, name_buff, len, 1);

	/* Referenced (parent) table name */
	ptr = dict_remove_db_name(foreign->referenced_table_name);
	len = filename_to_tablename(ptr, name_buff, sizeof(name));
	f_key_info.referenced_table = thd_make_lex_string(thd, 0, name_buff, len, 1);

	/* Dependent (child) database name */
	len = dict_get_db_name_len(foreign->foreign_table_name);
	ut_a(len < sizeof(tmp_buff));
	ut_memcpy(tmp_buff, foreign->foreign_table_name, len);
	tmp_buff[len] = 0;

	len = filename_to_tablename(tmp_buff, name_buff, sizeof(name_buff));
	f_key_info.foreign_db = thd_make_lex_string(thd, 0, name_buff, len, 1);

	/* Dependent (child) table name */
	ptr = dict_remove_db_name(foreign->foreign_table_name);
	len = filename_to_tablename(ptr, name_buff, sizeof(name_buff));
	f_key_info.foreign_table = thd_make_lex_string(thd, 0, name_buff, len, 1);

	do {
		ptr = foreign->foreign_col_names[i];
		name = thd_make_lex_string(thd, name, ptr,
					   (uint) strlen(ptr), 1);
		f_key_info.foreign_fields.push_back(name);
		ptr = foreign->referenced_col_names[i];
		name = thd_make_lex_string(thd, name, ptr,
					   (uint) strlen(ptr), 1);
		f_key_info.referenced_fields.push_back(name);
	} while (++i < foreign->n_fields);

	if (foreign->type & DICT_FOREIGN_ON_DELETE_CASCADE) {
		len = 7;
		ptr = "CASCADE";
	} else if (foreign->type & DICT_FOREIGN_ON_DELETE_SET_NULL) {
		len = 8;
		ptr = "SET NULL";
	} else if (foreign->type & DICT_FOREIGN_ON_DELETE_NO_ACTION) {
		len = 9;
		ptr = "NO ACTION";
	} else {
		len = 8;
		ptr = "RESTRICT";
	}

	f_key_info.delete_method = thd_make_lex_string(thd,
						       f_key_info.delete_method,
						       ptr, len, 1);

	if (foreign->type & DICT_FOREIGN_ON_UPDATE_CASCADE) {
		len = 7;
		ptr = "CASCADE";
	} else if (foreign->type & DICT_FOREIGN_ON_UPDATE_SET_NULL) {
		len = 8;
		ptr = "SET NULL";
	} else if (foreign->type & DICT_FOREIGN_ON_UPDATE_NO_ACTION) {
		len = 9;
		ptr = "NO ACTION";
	} else {
		len = 8;
		ptr = "RESTRICT";
	}

	f_key_info.update_method = thd_make_lex_string(thd,
						       f_key_info.update_method,
						       ptr, len, 1);

	if (foreign->referenced_index && foreign->referenced_index->name) {
		referenced_key_name = thd_make_lex_string(thd,
					f_key_info.referenced_key_name,
					foreign->referenced_index->name,
					 (uint) strlen(foreign->referenced_index->name),
					1);
	} else {
		referenced_key_name = NULL;
	}

	f_key_info.referenced_key_name = referenced_key_name;

	pf_key_info = (FOREIGN_KEY_INFO *) thd_memdup(thd, &f_key_info,
						      sizeof(FOREIGN_KEY_INFO));

	return(pf_key_info);
}

/*******************************************************************//**
Gets the list of foreign keys in this table.
@return always 0, that is, always succeeds */
8464
UNIV_INTERN
8465
int
8466 8467 8468 8469 8470 8471 8472 8473 8474 8475 8476 8477 8478 8479
ha_innobase::get_foreign_key_list(
/*==============================*/
	THD*			thd,		/*!< in: user thread handle */
	List<FOREIGN_KEY_INFO>*	f_key_list)	/*!< out: foreign key list */
{
	FOREIGN_KEY_INFO*	pf_key_info;
	dict_foreign_t*		foreign;

	ut_a(prebuilt != NULL);
	update_thd(ha_thd());

	prebuilt->trx->op_info = "getting list of foreign keys";

	trx_search_latch_release_if_reserved(prebuilt->trx);
8480

8481 8482 8483 8484
	mutex_enter(&(dict_sys->mutex));

	for (foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list);
	     foreign != NULL;
8485
	     foreign = UT_LIST_GET_NEXT(foreign_list, foreign)) {
8486 8487 8488 8489 8490 8491 8492 8493 8494 8495 8496 8497 8498 8499 8500 8501 8502 8503 8504 8505 8506 8507 8508 8509 8510 8511 8512 8513 8514 8515 8516 8517 8518 8519 8520 8521 8522 8523 8524 8525 8526 8527 8528 8529 8530 8531 8532 8533 8534
		pf_key_info = get_foreign_key_info(thd, foreign);
		if (pf_key_info) {
			f_key_list->push_back(pf_key_info);
		}
	}

	mutex_exit(&(dict_sys->mutex));

	prebuilt->trx->op_info = "";

	return(0);
}

/*******************************************************************//**
Gets the set of foreign keys where this table is the referenced table.
@return always 0, that is, always succeeds */
UNIV_INTERN
int
ha_innobase::get_parent_foreign_key_list(
/*=====================================*/
	THD*			thd,		/*!< in: user thread handle */
	List<FOREIGN_KEY_INFO>*	f_key_list)	/*!< out: foreign key list */
{
	FOREIGN_KEY_INFO*	pf_key_info;
	dict_foreign_t*		foreign;

	ut_a(prebuilt != NULL);
	update_thd(ha_thd());

	prebuilt->trx->op_info = "getting list of referencing foreign keys";

	trx_search_latch_release_if_reserved(prebuilt->trx);

	mutex_enter(&(dict_sys->mutex));

	for (foreign = UT_LIST_GET_FIRST(prebuilt->table->referenced_list);
	     foreign != NULL;
	     foreign = UT_LIST_GET_NEXT(referenced_list, foreign)) {
		pf_key_info = get_foreign_key_info(thd, foreign);
		if (pf_key_info) {
			f_key_list->push_back(pf_key_info);
		}
	}

	mutex_exit(&(dict_sys->mutex));

	prebuilt->trx->op_info = "";

	return(0);
osku's avatar
osku committed
8535 8536
}

8537
/*****************************************************************//**
osku's avatar
osku committed
8538 8539
Checks if ALTER TABLE may change the storage engine of the table.
Changing storage engines is not allowed for tables for which there
8540 8541
are foreign key constraints (parent or child tables).
@return	TRUE if can switch engines */
8542
UNIV_INTERN
osku's avatar
osku committed
8543 8544 8545 8546 8547 8548
bool
ha_innobase::can_switch_engines(void)
/*=================================*/
{
	bool	can_switch;

8549
	DBUG_ENTER("ha_innobase::can_switch_engines");
8550

8551
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
8552

osku's avatar
osku committed
8553 8554 8555 8556 8557 8558 8559 8560 8561 8562 8563 8564 8565
	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);
}

8566
/*******************************************************************//**
osku's avatar
osku committed
8567 8568 8569
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
8570 8571
REPLACE, not an update.
@return	> 0 if referenced by a FOREIGN KEY */
8572
UNIV_INTERN
osku's avatar
osku committed
8573 8574 8575 8576
uint
ha_innobase::referenced_by_foreign_key(void)
/*========================================*/
{
8577
	if (dict_table_is_referenced_by_foreign_key(prebuilt->table)) {
osku's avatar
osku committed
8578 8579 8580 8581 8582 8583 8584

		return(1);
	}

	return(0);
}

8585
/*******************************************************************//**
osku's avatar
osku committed
8586 8587
Frees the foreign key create info for a table stored in InnoDB, if it is
non-NULL. */
8588
UNIV_INTERN
osku's avatar
osku committed
8589 8590 8591
void
ha_innobase::free_foreign_key_create_info(
/*======================================*/
8592
	char*	str)	/*!< in, own: create info string to free */
osku's avatar
osku committed
8593 8594
{
	if (str) {
8595
		my_free(str);
osku's avatar
osku committed
8596 8597 8598
	}
}

8599
/*******************************************************************//**
8600 8601
Tells something additional to the handler about how to do things.
@return	0 or error number */
8602
UNIV_INTERN
osku's avatar
osku committed
8603 8604 8605 8606
int
ha_innobase::extra(
/*===============*/
	enum ha_extra_function operation)
8607
			   /*!< in: HA_EXTRA_FLUSH or some other flag */
osku's avatar
osku committed
8608 8609 8610 8611 8612 8613
{
	/* 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) {
8614 8615 8616 8617 8618 8619
		case HA_EXTRA_FLUSH:
			if (prebuilt->blob_heap) {
				row_mysql_prebuilt_free_blob_heap(prebuilt);
			}
			break;
		case HA_EXTRA_RESET_STATE:
8620
			reset_template(prebuilt);
8621
			break;
osku's avatar
osku committed
8622
		case HA_EXTRA_NO_KEYREAD:
8623 8624 8625 8626 8627
			prebuilt->read_just_key = 0;
			break;
		case HA_EXTRA_KEYREAD:
			prebuilt->read_just_key = 1;
			break;
osku's avatar
osku committed
8628 8629 8630
		case HA_EXTRA_KEYREAD_PRESERVE_FIELDS:
			prebuilt->keep_other_fields_on_keyread = 1;
			break;
8631 8632 8633 8634 8635 8636 8637

			/* 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! */
8638
		case HA_EXTRA_IGNORE_DUP_KEY:
8639
			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_IGNORE;
8640 8641
			break;
		case HA_EXTRA_WRITE_CAN_REPLACE:
8642
			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_REPLACE;
8643 8644
			break;
		case HA_EXTRA_WRITE_CANNOT_REPLACE:
8645
			thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_REPLACE;
8646 8647
			break;
		case HA_EXTRA_NO_IGNORE_DUP_KEY:
8648
			thd_to_trx(ha_thd())->duplicates &=
8649 8650
				~(TRX_DUP_IGNORE | TRX_DUP_REPLACE);
			break;
osku's avatar
osku committed
8651 8652 8653 8654 8655 8656 8657
		default:/* Do nothing */
			;
	}

	return(0);
}

8658 8659 8660
UNIV_INTERN
int
ha_innobase::reset()
8661
{
8662 8663 8664 8665 8666
	if (prebuilt->blob_heap) {
		row_mysql_prebuilt_free_blob_heap(prebuilt);
	}

	reset_template(prebuilt);
8667

8668 8669 8670 8671
	/* 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. */
8672
	prebuilt->autoinc_last_value = 0;
8673 8674 8675

	return(0);
}
8676

8677
/******************************************************************//**
osku's avatar
osku committed
8678 8679 8680 8681 8682 8683 8684 8685
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
8686
locks (thd_in_lock_tables(thd) holds in store_lock()) before executing the
8687 8688
procedure.
@return	0 or error code */
8689
UNIV_INTERN
osku's avatar
osku committed
8690 8691 8692
int
ha_innobase::start_stmt(
/*====================*/
8693
	THD*		thd,	/*!< in: handle to the user thread */
8694
	thr_lock_type	lock_type)
osku's avatar
osku committed
8695 8696 8697 8698 8699 8700 8701 8702 8703 8704 8705 8706 8707 8708 8709 8710
{
	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);

8711 8712 8713
	/* Reset the AUTOINC statement level counter for multi-row INSERTs. */
	trx->n_autoinc_rows = 0;

osku's avatar
osku committed
8714 8715
	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;
8716
	reset_template(prebuilt);
osku's avatar
osku committed
8717 8718

	if (!prebuilt->mysql_has_locked) {
8719 8720 8721 8722 8723 8724 8725
		/* 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;

8726 8727 8728
	} else if (trx->isolation_level != TRX_ISO_SERIALIZABLE
		   && thd_sql_command(thd) == SQLCOM_SELECT
		   && lock_type == TL_READ) {
osku's avatar
osku committed
8729

8730 8731
		/* For other than temporary tables, we obtain
		no lock for consistent read (plain SELECT). */
osku's avatar
osku committed
8732

8733 8734 8735 8736 8737 8738 8739 8740 8741
		prebuilt->select_lock_type = LOCK_NONE;
	} else {
		/* Not a consistent read: restore the
		select_lock_type value. The value of
		stored_select_lock_type was decided in:
		1) ::store_lock(),
		2) ::external_lock(),
		3) ::init_table_handle_for_HANDLER(), and
		4) ::transactional_table_lock(). */
osku's avatar
osku committed
8742

8743 8744
		prebuilt->select_lock_type = prebuilt->stored_select_lock_type;
	}
osku's avatar
osku committed
8745

8746
	*trx->detailed_error = 0;
osku's avatar
osku committed
8747

8748
	innobase_register_trx(ht, thd, trx);
osku's avatar
osku committed
8749 8750 8751 8752

	return(0);
}

8753
/******************************************************************//**
8754 8755
Maps a MySQL trx isolation level code to the InnoDB isolation level code
@return	InnoDB isolation level */
8756
static inline
osku's avatar
osku committed
8757 8758 8759
ulint
innobase_map_isolation_level(
/*=========================*/
8760
	enum_tx_isolation	iso)	/*!< in: MySQL isolation level code */
osku's avatar
osku committed
8761 8762 8763 8764 8765 8766 8767
{
	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);
8768
	}
osku's avatar
osku committed
8769
}
8770

8771
/******************************************************************//**
osku's avatar
osku committed
8772 8773 8774 8775 8776 8777
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
8778 8779
the SQL statement in case of an error.
@return	0 */
8780
UNIV_INTERN
osku's avatar
osku committed
8781 8782 8783
int
ha_innobase::external_lock(
/*=======================*/
8784 8785
	THD*	thd,		/*!< in: handle to the user thread */
	int	lock_type)	/*!< in: lock type */
osku's avatar
osku committed
8786 8787 8788
{
	trx_t*		trx;

8789
	DBUG_ENTER("ha_innobase::external_lock");
osku's avatar
osku committed
8790 8791 8792 8793
	DBUG_PRINT("enter",("lock_type: %d", lock_type));

	update_thd(thd);

8794 8795 8796
	/* 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
8797 8798 8799 8800 8801 8802
	informative error message and return with an error.
	Note: decide_logging_format would give the same error message,
	except it cannot give the extra details. */
	if (lock_type == F_WRLCK
	    && !(table_flags() & HA_BINLOG_STMT_CAPABLE)
	    && thd_binlog_format(thd) == BINLOG_FORMAT_STMT
8803 8804 8805
	    && thd_binlog_filter_ok(thd)
            && thd_sqlcom_can_generate_row_events(thd))
        {
8806 8807 8808 8809 8810 8811 8812 8813
		int skip = 0;
		/* used by test case */
		DBUG_EXECUTE_IF("no_innodb_binlog_errors", skip = 1;);
		if (!skip) {
			my_error(ER_BINLOG_STMT_MODE_AND_ROW_ENGINE, MYF(0),
			         " InnoDB is limited to row-logging when "
			         "transaction isolation level is "
			         "READ COMMITTED or READ UNCOMMITTED.");
8814 8815 8816 8817 8818
			DBUG_RETURN(HA_ERR_LOGGING_IMPOSSIBLE);
		}
	}


osku's avatar
osku committed
8819 8820 8821 8822 8823
	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

8824
	reset_template(prebuilt);
osku's avatar
osku committed
8825 8826 8827 8828 8829 8830 8831 8832 8833 8834 8835 8836

	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 */

8837
		*trx->detailed_error = 0;
8838

8839
		innobase_register_trx(ht, thd, trx);
osku's avatar
osku committed
8840 8841

		if (trx->isolation_level == TRX_ISO_SERIALIZABLE
8842 8843 8844
		    && prebuilt->select_lock_type == LOCK_NONE
		    && thd_test_options(
			    thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
8845 8846 8847 8848 8849 8850 8851 8852 8853 8854 8855 8856 8857 8858 8859 8860 8861

			/* 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
8862
		VERY easily deadlocks.
8863 8864

		We do not set InnoDB table locks if user has not explicitly
8865 8866
		requested a table lock. Note that thd_in_lock_tables(thd)
		can hold in some cases, e.g., at the start of a stored
8867
		procedure call (SQLCOM_CALL). */
osku's avatar
osku committed
8868 8869 8870

		if (prebuilt->select_lock_type != LOCK_NONE) {

8871 8872 8873
			if (thd_sql_command(thd) == SQLCOM_LOCK_TABLES
			    && THDVAR(thd, table_locks)
			    && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT)
8874
			    && thd_in_lock_tables(thd)) {
osku's avatar
osku committed
8875

8876 8877
				ulint	error = row_lock_table_for_mysql(
					prebuilt, NULL, 0);
osku's avatar
osku committed
8878 8879 8880

				if (error != DB_SUCCESS) {
					error = convert_error_code_to_mysql(
8881
						(int) error, 0, thd);
osku's avatar
osku committed
8882 8883 8884 8885
					DBUG_RETURN((int) error);
				}
			}

8886
			trx->mysql_n_tables_locked++;
osku's avatar
osku committed
8887 8888
		}

8889 8890 8891
		trx->n_mysql_tables_in_use++;
		prebuilt->mysql_has_locked = TRUE;

osku's avatar
osku committed
8892 8893 8894 8895 8896 8897 8898 8899
		DBUG_RETURN(0);
	}

	/* MySQL is releasing a table lock */

	trx->n_mysql_tables_in_use--;
	prebuilt->mysql_has_locked = FALSE;

8900 8901 8902 8903 8904 8905
	/* 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);

osku's avatar
osku committed
8906 8907 8908 8909 8910
	/* 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) {

8911
		trx->mysql_n_tables_locked = 0;
osku's avatar
osku committed
8912
		prebuilt->used_in_HANDLER = FALSE;
8913

8914 8915 8916 8917
		if (!thd_test_options(
				thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {

			if (trx_is_started(trx)) {
8918
				innobase_commit(ht, thd, TRUE);
osku's avatar
osku committed
8919 8920
			}

8921 8922
		} else if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
			   && trx->global_read_view) {
osku's avatar
osku committed
8923

8924 8925 8926 8927
			/* At low transaction isolation levels we let
			each consistent read set its own snapshot */

			read_view_close_for_mysql(trx);
osku's avatar
osku committed
8928 8929 8930 8931 8932 8933
		}
	}

	DBUG_RETURN(0);
}

8934
/******************************************************************//**
osku's avatar
osku committed
8935
With this function MySQL request a transactional lock to a table when
8936 8937
user issued query LOCK TABLES..WHERE ENGINE = InnoDB.
@return	error code */
8938
UNIV_INTERN
osku's avatar
osku committed
8939 8940 8941
int
ha_innobase::transactional_table_lock(
/*==================================*/
8942 8943
	THD*	thd,		/*!< in: handle to the user thread */
	int	lock_type)	/*!< in: lock type */
osku's avatar
osku committed
8944 8945 8946
{
	trx_t*		trx;

8947
	DBUG_ENTER("ha_innobase::transactional_table_lock");
osku's avatar
osku committed
8948 8949 8950 8951 8952 8953 8954 8955
	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);

8956
	if (prebuilt->table->ibd_file_missing && !thd_tablespace_op(thd)) {
8957
		ut_print_timestamp(stderr);
8958 8959 8960 8961 8962 8963 8964
		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?"
8965 8966
			"InnoDB: See " REFMAN
			"innodb-troubleshooting.html\n"
8967 8968
			"InnoDB: how you can resolve the problem.\n",
			prebuilt->table->name);
osku's avatar
osku committed
8969 8970 8971 8972 8973 8974 8975 8976
		DBUG_RETURN(HA_ERR_CRASHED);
	}

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

8977
	reset_template(prebuilt);
osku's avatar
osku committed
8978 8979 8980 8981 8982 8983 8984 8985

	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 {
8986 8987
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB error:\n"
osku's avatar
osku committed
8988 8989 8990 8991 8992 8993 8994 8995
"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 */

8996
	innobase_register_trx(ht, thd, trx);
osku's avatar
osku committed
8997

8998
	if (THDVAR(thd, table_locks) && thd_in_lock_tables(thd)) {
osku's avatar
osku committed
8999 9000 9001 9002 9003
		ulint	error = DB_SUCCESS;

		error = row_lock_table_for_mysql(prebuilt, NULL, 0);

		if (error != DB_SUCCESS) {
9004 9005
			error = convert_error_code_to_mysql(
				(int) error, prebuilt->table->flags, thd);
osku's avatar
osku committed
9006 9007 9008
			DBUG_RETURN((int) error);
		}

9009 9010
		if (thd_test_options(
			thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
9011

9012 9013
			/* Store the current undo_no of the transaction
			so that we know where to roll back if we have
osku's avatar
osku committed
9014 9015 9016 9017 9018 9019 9020 9021 9022
			to roll back the next SQL statement */

			trx_mark_sql_stat_end(trx);
		}
	}

	DBUG_RETURN(0);
}

9023
/************************************************************************//**
9024
Here we export InnoDB status variables to MySQL. */
9025
static
9026 9027 9028
void
innodb_export_status(void)
/*======================*/
osku's avatar
osku committed
9029
{
9030 9031 9032
	if (innodb_inited) {
		srv_export_innodb_status();
	}
osku's avatar
osku committed
9033 9034
}

9035
/************************************************************************//**
osku's avatar
osku committed
9036 9037
Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
Monitor to the client. */
9038
static
osku's avatar
osku committed
9039 9040 9041
bool
innodb_show_status(
/*===============*/
9042 9043
	handlerton*	hton,	/*!< in: the innodb handlerton */
	THD*	thd,	/*!< in: the MySQL query thread of the caller */
osku's avatar
osku committed
9044
	stat_print_fn *stat_print)
osku's avatar
osku committed
9045 9046 9047
{
	trx_t*			trx;
	static const char	truncated_msg[] = "... truncated...\n";
9048
	const long		MAX_STATUS_SIZE = 1048576;
osku's avatar
osku committed
9049 9050 9051
	ulint			trx_list_start = ULINT_UNDEFINED;
	ulint			trx_list_end = ULINT_UNDEFINED;

9052
	DBUG_ENTER("innodb_show_status");
9053
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
9054

9055
	trx = check_trx_exists(thd);
osku's avatar
osku committed
9056 9057 9058 9059 9060 9061 9062 9063 9064

	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;

9065
	mutex_enter(&srv_monitor_file_mutex);
osku's avatar
osku committed
9066
	rewind(srv_monitor_file);
9067 9068
	srv_printf_innodb_monitor(srv_monitor_file, FALSE,
				  &trx_list_start, &trx_list_end);
osku's avatar
osku committed
9069 9070 9071 9072 9073 9074 9075 9076 9077
	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;
9078
		srv_truncated_status_writes++;
osku's avatar
osku committed
9079 9080 9081 9082 9083 9084 9085
	} else {
		usable_len = flen;
	}

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

9086
	if (!(str = (char*) my_malloc(usable_len + 1, MYF(0)))) {
9087 9088
		mutex_exit(&srv_monitor_file_mutex);
		DBUG_RETURN(TRUE);
9089
	}
osku's avatar
osku committed
9090 9091 9092 9093 9094 9095 9096 9097 9098 9099 9100 9101 9102 9103 9104 9105 9106 9107 9108 9109 9110 9111

	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);
	}

9112
	mutex_exit(&srv_monitor_file_mutex);
osku's avatar
osku committed
9113

9114 9115
	stat_print(thd, innobase_hton_name, (uint) strlen(innobase_hton_name),
		   STRING_WITH_LEN(""), str, flen);
osku's avatar
osku committed
9116

9117
	my_free(str);
osku's avatar
osku committed
9118

osku's avatar
osku committed
9119
	DBUG_RETURN(FALSE);
osku's avatar
osku committed
9120 9121
}

9122
/************************************************************************//**
9123 9124
Implements the SHOW MUTEX STATUS command.
@return TRUE on failure, FALSE on success. */
9125
static
osku's avatar
osku committed
9126 9127
bool
innodb_mutex_show_status(
9128
/*=====================*/
9129
	handlerton*	hton,		/*!< in: the innodb handlerton */
9130
	THD*		thd,		/*!< in: the MySQL query thread of the
9131
					caller */
9132 9133
	stat_print_fn*	stat_print)	/*!< in: function for printing
					statistics */
9134 9135
{
	char buf1[IO_SIZE], buf2[IO_SIZE];
9136 9137
	mutex_t*	mutex;
	rw_lock_t*	lock;
9138 9139 9140 9141
	ulint		block_mutex_oswait_count = 0;
	ulint		block_lock_oswait_count = 0;
	mutex_t*	block_mutex = NULL;
	rw_lock_t*	block_lock = NULL;
9142
#ifdef UNIV_DEBUG
9143 9144 9145 9146 9147 9148
	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;
9149
#endif /* UNIV_DEBUG */
9150
	uint	  hton_name_len= (uint) strlen(innobase_hton_name), buf1len, buf2len;
9151
	DBUG_ENTER("innodb_mutex_show_status");
9152
	DBUG_ASSERT(hton == innodb_hton_ptr);
osku's avatar
osku committed
9153

9154
	mutex_enter(&mutex_list_mutex);
osku's avatar
osku committed
9155

9156 9157 9158 9159 9160
	for (mutex = UT_LIST_GET_FIRST(mutex_list); mutex != NULL;
	     mutex = UT_LIST_GET_NEXT(list, mutex)) {
		if (mutex->count_os_wait == 0) {
			continue;
		}
9161

9162 9163 9164 9165
		if (buf_pool_is_block_mutex(mutex)) {
			block_mutex = mutex;
			block_mutex_oswait_count += mutex->count_os_wait;
			continue;
9166
		}
9167
#ifdef UNIV_DEBUG
9168 9169 9170 9171 9172 9173 9174 9175 9176 9177 9178 9179 9180 9181 9182
		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,
9183
					(ulong) (mutex->lspent_time/1000));
9184

9185
				if (stat_print(thd, innobase_hton_name,
9186 9187
						hton_name_len, buf1, buf1len,
						buf2, buf2len)) {
9188
					mutex_exit(&mutex_list_mutex);
9189 9190 9191
					DBUG_RETURN(1);
				}
			}
9192
		} else {
9193 9194 9195 9196 9197 9198 9199
			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;
		}
9200
#else /* UNIV_DEBUG */
9201
		buf1len= (uint) my_snprintf(buf1, sizeof(buf1), "%s:%lu",
9202
				     mutex->cfile_name, (ulong) mutex->cline);
9203
		buf2len= (uint) my_snprintf(buf2, sizeof(buf2), "os_waits=%lu",
9204
				     (ulong) mutex->count_os_wait);
9205 9206 9207 9208

		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
9209
			mutex_exit(&mutex_list_mutex);
9210 9211 9212
			DBUG_RETURN(1);
		}
#endif /* UNIV_DEBUG */
9213 9214 9215 9216 9217 9218 9219 9220 9221 9222
	}

	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);
osku's avatar
osku committed
9223

9224 9225 9226 9227 9228 9229
		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
			mutex_exit(&mutex_list_mutex);
			DBUG_RETURN(1);
		}
9230 9231
	}

9232
	mutex_exit(&mutex_list_mutex);
9233

9234 9235
	mutex_enter(&rw_lock_list_mutex);

9236 9237
	for (lock = UT_LIST_GET_FIRST(rw_lock_list); lock != NULL;
	     lock = UT_LIST_GET_NEXT(list, lock)) {
9238
		if (lock->count_os_wait == 0) {
9239 9240 9241 9242 9243 9244 9245 9246 9247 9248 9249 9250 9251 9252 9253 9254 9255 9256 9257 9258 9259 9260 9261 9262 9263 9264 9265 9266 9267 9268 9269 9270 9271 9272 9273 9274
			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);
9275 9276 9277 9278 9279
		}
	}

	mutex_exit(&rw_lock_list_mutex);

9280
#ifdef UNIV_DEBUG
9281 9282 9283 9284 9285 9286 9287 9288 9289
	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));
9290

9291
	if (stat_print(thd, innobase_hton_name, hton_name_len,
9292 9293 9294
			STRING_WITH_LEN("rw_lock_mutexes"), buf2, buf2len)) {
		DBUG_RETURN(1);
	}
9295
#endif /* UNIV_DEBUG */
9296 9297

	DBUG_RETURN(FALSE);
osku's avatar
osku committed
9298 9299
}

9300
static
9301 9302 9303
bool innobase_show_status(handlerton *hton, THD* thd, 
                          stat_print_fn* stat_print,
                          enum ha_stat_type stat_type)
9304
{
9305 9306
	DBUG_ASSERT(hton == innodb_hton_ptr);

9307 9308
	switch (stat_type) {
	case HA_ENGINE_STATUS:
9309
		return innodb_show_status(hton, thd, stat_print);
9310
	case HA_ENGINE_MUTEX:
9311
		return innodb_mutex_show_status(hton, thd, stat_print);
9312
	default:
9313
		return(FALSE);
9314
	}
osku's avatar
osku committed
9315 9316
}

9317
/************************************************************************//**
osku's avatar
osku committed
9318 9319 9320 9321
 Handling the shared INNOBASE_SHARE structure that is needed to provide table
 locking.
****************************************************************************/

9322
static INNOBASE_SHARE* get_share(const char* table_name)
osku's avatar
osku committed
9323
{
9324
	INNOBASE_SHARE *share;
9325
	mysql_mutex_lock(&innobase_share_mutex);
9326

9327
	ulint	fold = ut_fold_string(table_name);
9328 9329 9330

	HASH_SEARCH(table_name_hash, innobase_open_tables, fold,
		    INNOBASE_SHARE*, share,
9331
		    ut_ad(share->use_count > 0),
9332
		    !strcmp(share->table_name, table_name));
9333 9334 9335

	if (!share) {

9336 9337
		uint length = (uint) strlen(table_name);

9338 9339
		/* TODO: invoke HASH_MIGRATE if innobase_open_tables
		grows too big */
9340 9341 9342 9343

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

9344 9345
		share->table_name = (char*) memcpy(share + 1,
						   table_name, length + 1);
9346

9347 9348
		HASH_INSERT(INNOBASE_SHARE, table_name_hash,
			    innobase_open_tables, fold, share);
9349 9350

		thr_lock_init(&share->lock);
9351 9352 9353 9354 9355

		/* 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;
9356 9357 9358
	}

	share->use_count++;
9359
	mysql_mutex_unlock(&innobase_share_mutex);
9360

9361
	return(share);
9362 9363 9364 9365
}

static void free_share(INNOBASE_SHARE* share)
{
9366
	mysql_mutex_lock(&innobase_share_mutex);
9367

9368 9369
#ifdef UNIV_DEBUG
	INNOBASE_SHARE* share2;
9370
	ulint	fold = ut_fold_string(share->table_name);
9371 9372 9373

	HASH_SEARCH(table_name_hash, innobase_open_tables, fold,
		    INNOBASE_SHARE*, share2,
9374
		    ut_ad(share->use_count > 0),
9375
		    !strcmp(share->table_name, share2->table_name));
9376 9377 9378 9379

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

9380
	if (!--share->use_count) {
9381
		ulint	fold = ut_fold_string(share->table_name);
9382 9383 9384

		HASH_DELETE(INNOBASE_SHARE, table_name_hash,
			    innobase_open_tables, fold, share);
9385
		thr_lock_delete(&share->lock);
9386 9387

		/* Free any memory from index translation table */
9388
		my_free(share->idx_trans_tbl.index_mapping);
9389

9390
		my_free(share);
9391 9392 9393

		/* TODO: invoke HASH_MIGRATE if innobase_open_tables
		shrinks too much */
9394 9395
	}

9396
	mysql_mutex_unlock(&innobase_share_mutex);
osku's avatar
osku committed
9397 9398
}

9399
/*****************************************************************//**
osku's avatar
osku committed
9400 9401 9402 9403 9404 9405
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
9406 9407
end of an SQL statement.
@return	pointer to the next element in the 'to' array */
9408
UNIV_INTERN
osku's avatar
osku committed
9409 9410 9411
THR_LOCK_DATA**
ha_innobase::store_lock(
/*====================*/
9412 9413
	THD*			thd,		/*!< in: user thread handle */
	THR_LOCK_DATA**		to,		/*!< in: pointer to an array
osku's avatar
osku committed
9414 9415 9416 9417
						of pointers to lock structs;
						pointer to the 'lock' field
						of current handle is stored
						next to this array */
9418
	enum thr_lock_type	lock_type)	/*!< in: lock type to store in
osku's avatar
osku committed
9419 9420 9421
						'lock'; this may also be
						TL_IGNORE */
{
9422 9423
	trx_t*		trx;

9424 9425 9426
	/* 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. */
9427

9428
	trx = check_trx_exists(thd);
osku's avatar
osku committed
9429

9430
	/* NOTE: MySQL can call this function with lock 'type' TL_IGNORE!
osku's avatar
osku committed
9431 9432 9433
	Be careful to ignore TL_IGNORE if we are going to do something with
	only 'real' locks! */

9434
	/* If no MySQL table is in use, we need to set the isolation level
9435 9436 9437
	of the transaction. */

	if (lock_type != TL_IGNORE
9438
	    && trx->n_mysql_tables_in_use == 0) {
9439
		trx->isolation_level = innobase_map_isolation_level(
9440
			(enum_tx_isolation) thd_tx_isolation(thd));
9441 9442 9443 9444 9445 9446 9447 9448 9449

		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);
		}
9450 9451
	}

9452
	DBUG_ASSERT(EQ_CURRENT_THD(thd));
9453
	const bool in_lock_tables = thd_in_lock_tables(thd);
9454
	const uint sql_command = thd_sql_command(thd);
9455

9456
	if (sql_command == SQLCOM_DROP_TABLE) {
9457 9458 9459 9460 9461

		/* 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. */ 

9462 9463 9464 9465 9466 9467
	} 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)) {
osku's avatar
osku committed
9468 9469

		/* The OR cases above are in this order:
9470 9471
		1) MySQL is doing LOCK TABLES ... READ LOCAL, or we
		are processing a stored procedure or function, or
osku's avatar
osku committed
9472 9473 9474 9475 9476 9477 9478 9479 9480 9481 9482 9483 9484 9485 9486
		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. */

9487
		ulint	isolation_level;
osku's avatar
osku committed
9488

9489 9490 9491
		isolation_level = trx->isolation_level;

		if ((srv_locks_unsafe_for_binlog
Vasil Dimov's avatar
Vasil Dimov committed
9492
		     || isolation_level <= TRX_ISO_READ_COMMITTED)
9493 9494 9495
		    && isolation_level != TRX_ISO_SERIALIZABLE
		    && (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT)
		    && (sql_command == SQLCOM_INSERT_SELECT
9496
			|| sql_command == SQLCOM_REPLACE_SELECT
9497 9498
			|| sql_command == SQLCOM_UPDATE
			|| sql_command == SQLCOM_CREATE_TABLE)) {
9499 9500 9501 9502

			/* 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
osku's avatar
osku committed
9503
			is not set to serializable and MySQL is doing
9504 9505 9506 9507 9508
			INSERT INTO...SELECT or REPLACE INTO...SELECT
			or UPDATE ... = (SELECT ...) or CREATE  ...
			SELECT... without FOR UPDATE or IN SHARE
			MODE in select, then we use consistent read
			for select. */
osku's avatar
osku committed
9509 9510 9511

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
9512
		} else if (sql_command == SQLCOM_CHECKSUM) {
osku's avatar
osku committed
9513 9514 9515 9516 9517 9518 9519 9520 9521 9522 9523
			/* 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) {

9524
		/* We set possible LOCK_X value in external_lock, not yet
osku's avatar
osku committed
9525 9526 9527 9528 9529 9530 9531 9532
		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) {

9533
		/* Starting from 5.0.7, we weaken also the table locks
osku's avatar
osku committed
9534 9535
		set at the start of a MySQL stored procedure call, just like
		we weaken the locks set at the start of an SQL statement.
9536
		MySQL does set in_lock_tables TRUE there, but in reality
osku's avatar
osku committed
9537 9538 9539 9540
		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). */

9541
		if (lock_type == TL_READ
9542
		    && sql_command == SQLCOM_LOCK_TABLES) {
osku's avatar
osku committed
9543 9544 9545 9546 9547 9548 9549 9550 9551 9552 9553 9554 9555 9556
			/* 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;
		}

9557
		/* If we are not doing a LOCK TABLE, DISCARD/IMPORT
9558
		TABLESPACE or TRUNCATE TABLE then allow multiple
9559 9560
		writers. Note that ALTER TABLE uses a TL_WRITE_ALLOW_READ
		< TL_WRITE_CONCURRENT_INSERT.
osku's avatar
osku committed
9561

9562
		We especially allow multiple writers if MySQL is at the
9563
		start of a stored procedure call (SQLCOM_CALL) or a
9564
		stored function call (MySQL does have in_lock_tables
9565
		TRUE there). */
9566

9567
		if ((lock_type >= TL_WRITE_CONCURRENT_INSERT
9568 9569 9570 9571 9572 9573 9574
		     && 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) {
osku's avatar
osku committed
9575

9576
			lock_type = TL_WRITE_ALLOW_WRITE;
9577
		}
osku's avatar
osku committed
9578 9579 9580 9581 9582

		/* 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
9583
		concurrent inserts to t2.
9584

9585 9586
		We especially allow concurrent inserts if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL)
9587
		(MySQL does have thd_in_lock_tables() TRUE there). */
9588

osku's avatar
osku committed
9589
		if (lock_type == TL_READ_NO_INSERT
9590
		    && sql_command != SQLCOM_LOCK_TABLES) {
osku's avatar
osku committed
9591 9592 9593

			lock_type = TL_READ;
		}
9594

9595 9596
		lock.type = lock_type;
	}
osku's avatar
osku committed
9597

9598
	*to++= &lock;
osku's avatar
osku committed
9599 9600 9601 9602

	return(to);
}

9603
/*********************************************************************//**
9604 9605
Read the next autoinc value. Acquire the relevant locks before reading
the AUTOINC value. If SUCCESS then the table AUTOINC mutex will be locked
9606 9607
on return and all relevant locks acquired.
@return	DB_SUCCESS or error code */
9608
UNIV_INTERN
9609 9610 9611
ulint
ha_innobase::innobase_get_autoinc(
/*==============================*/
9612
	ulonglong*	value)		/*!< out: autoinc value */
osku's avatar
osku committed
9613
{
9614 9615
 	*value = 0;
 
9616
	prebuilt->autoinc_error = innobase_lock_autoinc();
osku's avatar
osku committed
9617

9618
	if (prebuilt->autoinc_error == DB_SUCCESS) {
osku's avatar
osku committed
9619

9620 9621 9622 9623
		/* Determine the first value of the interval */
		*value = dict_table_autoinc_read(prebuilt->table);

		/* It should have been initialized during open. */
9624 9625 9626 9627
		if (*value == 0) {
			prebuilt->autoinc_error = DB_UNSUPPORTED;
			dict_table_autoinc_unlock(prebuilt->table);
		}
osku's avatar
osku committed
9628
	}
9629 9630

	return(prebuilt->autoinc_error);
9631
}
9632

9633
/*******************************************************************//**
9634
This function reads the global auto-inc counter. It doesn't use the
9635 9636
AUTOINC lock even if the lock mode is set to TRADITIONAL.
@return	the autoinc value */
9637
UNIV_INTERN
9638 9639 9640
ulonglong
ha_innobase::innobase_peek_autoinc(void)
/*====================================*/
9641
{
9642 9643
	ulonglong	auto_inc;
	dict_table_t*	innodb_table;
9644

9645 9646
	ut_a(prebuilt != NULL);
	ut_a(prebuilt->table != NULL);
9647

9648
	innodb_table = prebuilt->table;
9649

9650
	dict_table_autoinc_lock(innodb_table);
9651

9652
	auto_inc = dict_table_autoinc_read(innodb_table);
9653

9654 9655 9656 9657 9658
	if (auto_inc == 0) {
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB: AUTOINC next value generation "
			"is disabled for '%s'\n", innodb_table->name);
	}
9659

9660
	dict_table_autoinc_unlock(innodb_table);
9661

9662
	return(auto_inc);
osku's avatar
osku committed
9663
}
9664 9665

/*********************************************************************//**
osku's avatar
osku committed
9666 9667 9668
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
9669 9670
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.
9671 9672
*first_value is set to -1 if error (deadlock or lock wait timeout) */
UNIV_INTERN
9673 9674
void
ha_innobase::get_auto_increment(
9675
/*============================*/
9676
        ulonglong	offset,              /*!< in: table autoinc offset */
9677 9678 9679 9680
        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 */
osku's avatar
osku committed
9681
{
9682
	trx_t*		trx;
9683 9684
	ulint		error;
	ulonglong	autoinc = 0;
9685

9686
	/* Prepare prebuilt->trx in the table handle */
9687
	update_thd(ha_thd());
9688

9689
	error = innobase_get_autoinc(&autoinc);
osku's avatar
osku committed
9690

9691 9692
	if (error != DB_SUCCESS) {
		*first_value = (~(ulonglong) 0);
9693
		return;
osku's avatar
osku committed
9694 9695
	}

9696 9697 9698 9699 9700 9701
	/* 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()).
9702
	*/
9703

9704
	trx = prebuilt->trx;
9705

9706 9707 9708 9709
	/* 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. */
9710

9711 9712 9713 9714 9715
	/* 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);

9716 9717
	/* Called for the first time ? */
	if (trx->n_autoinc_rows == 0) {
9718

9719
		trx->n_autoinc_rows = (ulint) nb_desired_values;
9720

9721 9722 9723 9724 9725
		/* 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;
9726 9727
		}

9728
		set_if_bigger(*first_value, autoinc);
9729
	/* Not in the middle of a mult-row INSERT. */
9730
	} else if (prebuilt->autoinc_last_value == 0) {
9731
		set_if_bigger(*first_value, autoinc);
9732 9733 9734 9735 9736
	/* 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;
9737 9738
	}

9739
	*nb_reserved_values = trx->n_autoinc_rows;
9740

9741 9742 9743
	/* 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) {
9744
		ulonglong	need;
9745
		ulonglong	current;
9746
		ulonglong	next_value;
9747

9748
		current = *first_value > col_max_value ? autoinc : *first_value;
9749
		need = *nb_reserved_values * increment;
9750

9751
		/* Compute the last value in the interval */
9752
		next_value = innobase_next_autoinc(
9753
			current, need, offset, col_max_value);
9754

9755 9756
		prebuilt->autoinc_last_value = next_value;

9757 9758 9759 9760 9761 9762 9763
		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);
		}
9764 9765 9766
	} else {
		/* This will force write_row() into attempting an update
		of the table's AUTOINC counter. */
9767
		prebuilt->autoinc_last_value = 0;
9768
	}
9769 9770 9771

	/* The increment to be used to increase the AUTOINC value, we use
	this in write_row() and update_row() to increase the autoinc counter
9772 9773 9774 9775
	for columns that are filled by the user. We need the offset and
	the increment. */
	prebuilt->autoinc_offset = offset;
	prebuilt->autoinc_increment = increment;
9776 9777

	dict_table_autoinc_unlock(prebuilt->table);
osku's avatar
osku committed
9778 9779
}

9780
/*******************************************************************//**
9781 9782 9783
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
9784 9785
returned by storage engines that don't support this operation.
@return	0 or error code */
9786
UNIV_INTERN
osku's avatar
osku committed
9787
int
9788 9789
ha_innobase::reset_auto_increment(
/*==============================*/
9790
	ulonglong	value)		/*!< in: new value for table autoinc */
osku's avatar
osku committed
9791 9792 9793
{
	DBUG_ENTER("ha_innobase::reset_auto_increment");

9794
	int	error;
osku's avatar
osku committed
9795

9796
	update_thd(ha_thd());
9797

osku's avatar
osku committed
9798 9799 9800
	error = row_lock_table_autoinc_for_mysql(prebuilt);

	if (error != DB_SUCCESS) {
9801 9802 9803
		error = convert_error_code_to_mysql(error,
						    prebuilt->table->flags,
						    user_thd);
osku's avatar
osku committed
9804 9805

		DBUG_RETURN(error);
9806
	}
osku's avatar
osku committed
9807

9808 9809 9810 9811 9812
	/* The next value can never be 0. */
	if (value == 0) {
		value = 1;
	}

9813
	innobase_reset_autoinc(value);
osku's avatar
osku committed
9814 9815 9816 9817 9818

	DBUG_RETURN(0);
}

/* See comment in handler.cc */
9819
UNIV_INTERN
osku's avatar
osku committed
9820 9821 9822
bool
ha_innobase::get_error_message(int error, String *buf)
{
9823
	trx_t*	trx = check_trx_exists(ha_thd());
osku's avatar
osku committed
9824

9825
	buf->copy(trx->detailed_error, (uint) strlen(trx->detailed_error),
osku's avatar
osku committed
9826 9827
		system_charset_info);

9828
	return(FALSE);
osku's avatar
osku committed
9829 9830
}

9831
/*******************************************************************//**
osku's avatar
osku committed
9832 9833
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
9834 9835
InnoDB internally uses the row id as the primary key.
@return	< 0 if ref1 < ref2, 0 if equal, else > 0 */
9836
UNIV_INTERN
osku's avatar
osku committed
9837 9838 9839
int
ha_innobase::cmp_ref(
/*=================*/
9840
	const uchar*	ref1,	/*!< in: an (internal) primary key value in the
osku's avatar
osku committed
9841
				MySQL key value format */
9842
	const uchar*	ref2)	/*!< in: an (internal) primary key value in the
osku's avatar
osku committed
9843 9844 9845 9846 9847 9848 9849 9850
				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;
9851
	int		result;
osku's avatar
osku committed
9852 9853 9854 9855 9856 9857 9858 9859 9860 9861 9862 9863 9864 9865 9866 9867 9868 9869 9870

	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();

9871 9872 9873 9874
		if (mysql_type == MYSQL_TYPE_TINY_BLOB
			|| mysql_type == MYSQL_TYPE_MEDIUM_BLOB
			|| mysql_type == MYSQL_TYPE_BLOB
			|| mysql_type == MYSQL_TYPE_LONG_BLOB) {
9875

osku's avatar
osku committed
9876 9877 9878 9879 9880 9881 9882 9883
			/* 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;
9884 9885
			result = ((Field_blob*)field)->cmp( ref1, len1,
                                                            ref2, len2);
osku's avatar
osku committed
9886 9887 9888 9889 9890 9891 9892 9893 9894 9895 9896 9897 9898 9899 9900 9901
		} else {
			result = field->key_cmp(ref1, ref2);
		}

		if (result) {

			return(result);
		}

		ref1 += key_part->store_length;
		ref2 += key_part->store_length;
	}

	return(0);
}

9902
/*******************************************************************//**
9903 9904
Ask InnoDB if a query to a table can be cached.
@return	TRUE if query caching of the table is permitted */
9905
UNIV_INTERN
9906 9907 9908
my_bool
ha_innobase::register_query_cache_table(
/*====================================*/
9909 9910
	THD*		thd,		/*!< in: user thread handle */
	char*		table_key,	/*!< in: concatenation of database name,
9911
					the null character NUL,
9912
					and the table name */
9913
	uint		key_length,	/*!< in: length of the full name, i.e.
9914 9915
					len(dbname) + len(tablename) + 1 */
	qc_engine_callback*
9916
			call_back,	/*!< out: pointer to function for
9917 9918
					checking if query caching
					is permitted */
9919
	ulonglong	*engine_data)	/*!< in/out: data to call_back */
9920 9921 9922 9923 9924 9925 9926 9927
{
	*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));
}

9928
UNIV_INTERN
osku's avatar
osku committed
9929 9930 9931 9932 9933 9934
char*
ha_innobase::get_mysql_bin_log_name()
{
	return(trx_sys_mysql_bin_log_name);
}

9935
UNIV_INTERN
osku's avatar
osku committed
9936 9937 9938
ulonglong
ha_innobase::get_mysql_bin_log_pos()
{
9939
	/* trx... is ib_int64_t, which is a typedef for a 64-bit integer
osku's avatar
osku committed
9940 9941
	(__int64 or longlong) so it's ok to cast it to ulonglong. */

9942
	return(trx_sys_mysql_bin_log_pos);
osku's avatar
osku committed
9943 9944
}

9945
/******************************************************************//**
osku's avatar
osku committed
9946 9947 9948
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
9949 9950
index field in bytes.
@return	number of bytes occupied by the first n characters */
9951
extern "C" UNIV_INTERN
osku's avatar
osku committed
9952 9953 9954
ulint
innobase_get_at_most_n_mbchars(
/*===========================*/
9955 9956
	ulint charset_id,	/*!< in: character set id */
	ulint prefix_len,	/*!< in: prefix length in bytes of the index
osku's avatar
osku committed
9957 9958
				(this has to be divided by mbmaxlen to get the
				number of CHARACTERS n in the prefix) */
9959 9960
	ulint data_len,		/*!< in: length of the string in bytes */
	const char* str)	/*!< in: character string */
osku's avatar
osku committed
9961
{
9962 9963 9964
	ulint char_length;	/*!< character length in bytes */
	ulint n_chars;		/*!< number of characters in prefix */
	CHARSET_INFO* charset;	/*!< charset used in the field */
osku's avatar
osku committed
9965 9966 9967 9968 9969 9970 9971 9972 9973 9974 9975 9976 9977 9978 9979 9980 9981 9982 9983 9984 9985 9986 9987 9988 9989 9990 9991 9992 9993 9994 9995 9996 9997 9998 9999 10000 10001 10002

	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;
10003
		}
osku's avatar
osku committed
10004 10005 10006 10007 10008 10009 10010 10011 10012 10013 10014
	} else {
		if (data_len < prefix_len) {
			char_length = data_len;
		} else {
			char_length = prefix_len;
		}
	}

	return(char_length);
}

10015 10016
/*******************************************************************//**
This function is used to prepare an X/Open XA distributed transaction.
10017
@return	0 or error number */
10018
static
10019
int
osku's avatar
osku committed
10020 10021
innobase_xa_prepare(
/*================*/
10022 10023 10024 10025 10026 10027 10028
        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 */
osku's avatar
osku committed
10029 10030
{
	int error = 0;
10031
	trx_t* trx = check_trx_exists(thd);
osku's avatar
osku committed
10032

10033 10034
	DBUG_ASSERT(hton == innodb_hton_ptr);

10035 10036 10037 10038
	/* 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) {
osku's avatar
osku committed
10039 10040 10041 10042

		return(0);
	}

10043
	thd_get_xid(thd, (MYSQL_XID*) &trx->xid);
osku's avatar
osku committed
10044 10045 10046 10047 10048 10049 10050

	/* 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);

10051
	if (!trx_is_registered_for_2pc(trx) && trx_is_started(trx)) {
osku's avatar
osku committed
10052

10053 10054
		sql_print_error("Transaction not registered for MySQL 2PC, "
				"but transaction is active");
osku's avatar
osku committed
10055 10056 10057
	}

	if (all
10058
	    || (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
osku's avatar
osku committed
10059

10060 10061
		/* We were instructed to prepare the whole transaction, or
		this is an SQL statement end and autocommit is on */
osku's avatar
osku committed
10062

10063
		ut_ad(trx_is_registered_for_2pc(trx));
osku's avatar
osku committed
10064 10065 10066

		error = (int) trx_prepare_for_mysql(trx);
	} else {
10067
		/* We just mark the SQL statement ended and do not do a
osku's avatar
osku committed
10068 10069
		transaction prepare */

10070 10071
		/* If we had reserved the auto-inc lock for some
		table in this SQL statement we release it now */
osku's avatar
osku committed
10072

10073
		row_unlock_table_autoinc_for_mysql(trx);
10074

osku's avatar
osku committed
10075 10076 10077 10078 10079 10080 10081 10082 10083 10084 10085 10086
		/* 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();

10087 10088 10089 10090
	if (thd_sql_command(thd) != SQLCOM_XA_PREPARE
	    && (all
		|| !thd_test_options(
			thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
inaam's avatar
inaam committed
10091 10092 10093 10094 10095 10096 10097 10098 10099 10100 10101 10102 10103 10104 10105 10106 10107 10108

		/* 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
10109
		to block for undefined period of time. */
10110
		mysql_mutex_lock(&prepare_commit_mutex);
10111
		trx_owns_prepare_commit_mutex_set(trx);
inaam's avatar
inaam committed
10112 10113
	}

10114
	return(error);
osku's avatar
osku committed
10115 10116
}

10117 10118
/*******************************************************************//**
This function is used to recover X/Open XA distributed transactions.
10119
@return	number of prepared transactions stored in xid_list */
10120
static
10121
int
osku's avatar
osku committed
10122 10123
innobase_xa_recover(
/*================*/
10124 10125 10126
	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid_list,/*!< in/out: prepared transactions */
	uint		len)	/*!< in: number of slots in xid_list */
osku's avatar
osku committed
10127
{
10128 10129
	DBUG_ASSERT(hton == innodb_hton_ptr);

osku's avatar
osku committed
10130 10131 10132 10133 10134 10135 10136 10137
	if (len == 0 || xid_list == NULL) {

		return(0);
	}

	return(trx_recover_for_mysql(xid_list, len));
}

10138
/*******************************************************************//**
osku's avatar
osku committed
10139
This function is used to commit one X/Open XA distributed transaction
10140 10141
which is in the prepared state
@return	0 or error number */
10142
static
10143
int
osku's avatar
osku committed
10144 10145
innobase_commit_by_xid(
/*===================*/
10146 10147
	handlerton*	hton,
	XID*		xid)	/*!< in: X/Open XA transaction identification */
osku's avatar
osku committed
10148 10149 10150
{
	trx_t*	trx;

10151 10152
	DBUG_ASSERT(hton == innodb_hton_ptr);

osku's avatar
osku committed
10153 10154 10155 10156
	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		innobase_commit_low(trx);
10157

osku's avatar
osku committed
10158 10159 10160 10161 10162 10163
		return(XA_OK);
	} else {
		return(XAER_NOTA);
	}
}

10164
/*******************************************************************//**
osku's avatar
osku committed
10165
This function is used to rollback one X/Open XA distributed transaction
10166 10167
which is in the prepared state
@return	0 or error number */
10168
static
10169
int
osku's avatar
osku committed
10170 10171
innobase_rollback_by_xid(
/*=====================*/
10172 10173 10174
	handlerton*	hton,	/*!< in: InnoDB handlerton */
	XID*		xid)	/*!< in: X/Open XA transaction
				identification */
osku's avatar
osku committed
10175 10176 10177
{
	trx_t*	trx;

10178 10179
	DBUG_ASSERT(hton == innodb_hton_ptr);

osku's avatar
osku committed
10180 10181 10182 10183 10184 10185 10186 10187 10188
	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		return(innobase_rollback_trx(trx));
	} else {
		return(XAER_NOTA);
	}
}

10189
/*******************************************************************//**
osku's avatar
osku committed
10190 10191
Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
10192
This consistent view is then used inside of MySQL when accessing records
10193 10194
using a cursor.
@return	pointer to cursor view or NULL */
10195
static
osku's avatar
osku committed
10196
void*
10197
innobase_create_cursor_view(
10198
/*========================*/
10199 10200
        handlerton *hton, /*!< in: innobase hton */
	THD* thd)	  /*!< in: user thread handle */
osku's avatar
osku committed
10201
{
10202 10203
	DBUG_ASSERT(hton == innodb_hton_ptr);

10204
	return(read_cursor_view_create_for_mysql(check_trx_exists(thd)));
osku's avatar
osku committed
10205 10206
}

10207
/*******************************************************************//**
osku's avatar
osku committed
10208
Close the given consistent cursor view of a transaction and restore
10209
global read view to a transaction read view. Transaction is created if the
osku's avatar
osku committed
10210
corresponding MySQL thread still lacks one. */
10211
static
osku's avatar
osku committed
10212 10213
void
innobase_close_cursor_view(
10214
/*=======================*/
10215
        handlerton *hton,
10216 10217
	THD*	thd,	/*!< in: user thread handle */
	void*	curview)/*!< in: Consistent read view to be closed */
osku's avatar
osku committed
10218
{
10219 10220
	DBUG_ASSERT(hton == innodb_hton_ptr);

10221 10222
	read_cursor_view_close_for_mysql(check_trx_exists(thd),
					 (cursor_view_t*) curview);
osku's avatar
osku committed
10223 10224
}

10225
/*******************************************************************//**
10226 10227
Set the given consistent cursor view to a transaction which is created
if the corresponding MySQL thread still lacks one. If the given
osku's avatar
osku committed
10228 10229
consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
10230
static
osku's avatar
osku committed
10231 10232 10233
void
innobase_set_cursor_view(
/*=====================*/
10234
        handlerton *hton,
10235 10236
	THD*	thd,	/*!< in: user thread handle */
	void*	curview)/*!< in: Consistent cursor view to be set */
osku's avatar
osku committed
10237
{
10238 10239
	DBUG_ASSERT(hton == innodb_hton_ptr);

10240 10241
	read_cursor_set_for_mysql(check_trx_exists(thd),
				  (cursor_view_t*) curview);
osku's avatar
osku committed
10242 10243
}

10244 10245 10246 10247 10248 10249 10250 10251 10252 10253 10254 10255 10256 10257 10258 10259 10260
/*******************************************************************//**
If col_name is not NULL, check whether the named column is being
renamed in the table. If col_name is not provided, check
whether any one of columns in the table is being renamed.
@return true if the column is being renamed */
static
bool
check_column_being_renamed(
/*=======================*/
	const TABLE*	table,		/*!< in: MySQL table */
	const char*	col_name)	/*!< in: name of the column */
{
	uint		k;
	Field*		field;

	for (k = 0; k < table->s->fields; k++) {
		field = table->field[k];
osku's avatar
osku committed
10261

10262 10263 10264 10265 10266 10267 10268 10269 10270 10271 10272 10273 10274 10275 10276 10277 10278 10279 10280 10281 10282 10283 10284
		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 */
10285 10286 10287 10288
static
bool
column_is_being_renamed(
/*====================*/
10289 10290 10291
	TABLE*		table,		/*!< in: MySQL table */
	uint		n_cols,		/*!< in: number of columns */
	const char**	col_names)	/*!< in: names of the columns */
10292 10293 10294 10295
{
	uint		j;

	for (j = 0; j < n_cols; j++) {
10296 10297
		if (check_column_being_renamed(table, col_names[j])) {
			return(true);
10298 10299 10300 10301 10302 10303 10304 10305 10306 10307 10308 10309 10310 10311 10312 10313 10314 10315 10316 10317 10318 10319 10320 10321 10322 10323 10324 10325 10326 10327 10328 10329 10330 10331 10332 10333 10334 10335 10336 10337 10338 10339 10340 10341 10342 10343 10344 10345 10346 10347 10348 10349 10350 10351 10352 10353 10354 10355 10356 10357 10358 10359 10360 10361 10362
		}
	}

	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);
}

10363 10364 10365
UNIV_INTERN
bool
ha_innobase::check_if_incompatible_data(
10366 10367
	HA_CREATE_INFO*	info,
	uint		table_changes)
osku's avatar
osku committed
10368
{
10369
	if (table_changes != IS_EQUAL_YES) {
osku's avatar
osku committed
10370

10371
		return(COMPATIBLE_DATA_NO);
10372 10373 10374 10375 10376 10377
	}

	/* Check that auto_increment value was not changed */
	if ((info->used_fields & HA_CREATE_USED_AUTO) &&
		info->auto_increment_value != 0) {

10378
		return(COMPATIBLE_DATA_NO);
10379 10380
	}

10381 10382 10383 10384 10385 10386 10387 10388 10389
	/* 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;
	}

10390 10391 10392 10393 10394 10395 10396
	/* 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;
	}

10397
	/* Check that row format didn't change */
10398 10399 10400
	if ((info->used_fields & HA_CREATE_USED_ROW_FORMAT)
	    && info->row_type != ROW_TYPE_DEFAULT
	    && info->row_type != get_row_type()) {
10401 10402 10403

		return(COMPATIBLE_DATA_NO);
	}
osku's avatar
osku committed
10404

10405 10406
	/* Specifying KEY_BLOCK_SIZE requests a rebuild of the table. */
	if (info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE) {
10407
		return(COMPATIBLE_DATA_NO);
10408 10409
	}

10410
	return(COMPATIBLE_DATA_YES);
10411
}
10412

10413
/************************************************************//**
10414 10415
Validate the file format name and return its corresponding id.
@return	valid file format id */
10416 10417 10418 10419
static
uint
innobase_file_format_name_lookup(
/*=============================*/
10420
	const char*	format_name)	/*!< in: pointer to file format name */
10421 10422 10423 10424 10425 10426 10427 10428 10429 10430 10431 10432 10433 10434 10435 10436 10437 10438 10439 10440 10441 10442 10443 10444 10445 10446 10447 10448 10449 10450 10451 10452 10453 10454 10455
{
	char*	endp;
	uint	format_id;

	ut_a(format_name != NULL);

	/* The format name can contain the format id itself instead of
	the name and we check for that. */
	format_id = (uint) strtoul(format_name, &endp, 10);

	/* Check for valid parse. */
	if (*endp == '\0' && *format_name != '\0') {

		if (format_id <= DICT_TF_FORMAT_MAX) {

			return(format_id);
		}
	} else {

		for (format_id = 0; format_id <= DICT_TF_FORMAT_MAX;
		     format_id++) {
			const char*	name;

			name = trx_sys_file_format_id_to_name(format_id);

			if (!innobase_strcasecmp(format_name, name)) {

				return(format_id);
			}
		}
	}

	return(DICT_TF_FORMAT_MAX + 1);
}

10456
/************************************************************//**
10457
Validate the file format check config parameters, as a side effect it
10458
sets the srv_max_file_format_at_startup variable.
10459
@return the format_id if valid config value, otherwise, return -1 */
10460
static
10461 10462
int
innobase_file_format_validate_and_set(
10463 10464
/*==================================*/
	const char*	format_max)	/*!< in: parameter value */
10465 10466
{
	uint		format_id;
10467

10468
	format_id = innobase_file_format_name_lookup(format_max);
10469 10470

	if (format_id < DICT_TF_FORMAT_MAX + 1) {
10471
		srv_max_file_format_at_startup = format_id;
10472 10473

		return((int) format_id);
10474
	} else {
10475
		return(-1);
10476 10477 10478
	}
}

10479
/*************************************************************//**
10480
Check if it is a valid file format. This function is registered as
10481 10482
a callback with MySQL.
@return	0 for valid file format */
10483 10484 10485 10486
static
int
innodb_file_format_name_validate(
/*=============================*/
10487 10488
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
10489
						variable */
10490
	void*				save,	/*!< out: immediate result
10491
						for update function */
10492
	struct st_mysql_value*		value)	/*!< in: incoming string */
10493 10494 10495 10496 10497 10498 10499 10500 10501 10502 10503 10504 10505 10506 10507 10508 10509 10510
{
	const char*	file_format_input;
	char		buff[STRING_BUFFER_USUAL_SIZE];
	int		len = sizeof(buff);

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

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

	if (file_format_input != NULL) {
		uint	format_id;

		format_id = innobase_file_format_name_lookup(
			file_format_input);

		if (format_id <= DICT_TF_FORMAT_MAX) {

10511 10512 10513 10514 10515
			/* 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);

10516 10517 10518 10519
			return(0);
		}
	}

10520
	*static_cast<const char**>(save) = NULL;
10521 10522 10523
	return(1);
}

10524
/****************************************************************//**
10525 10526 10527
Update the system variable innodb_file_format using the "saved"
value. This function is registered as a callback with MySQL. */
static
10528
void
10529 10530
innodb_file_format_name_update(
/*===========================*/
10531 10532
	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
10533
							system variable */
10534
	void*				var_ptr,	/*!< out: where the
10535
							formal string goes */
10536
	const void*			save)		/*!< in: immediate result
10537 10538
							from check function */
{
10539 10540
	const char* format_name;

10541 10542 10543
	ut_a(var_ptr != NULL);
	ut_a(save != NULL);

10544 10545 10546 10547 10548 10549 10550 10551 10552 10553 10554
	format_name = *static_cast<const char*const*>(save);

	if (format_name) {
		uint	format_id;

		format_id = innobase_file_format_name_lookup(format_name);

		if (format_id <= DICT_TF_FORMAT_MAX) {
			srv_file_format = format_id;
		}
	}
10555

10556
	*static_cast<const char**>(var_ptr)
10557
		= trx_sys_file_format_id_to_name(srv_file_format);
10558
}
10559
/*************************************************************//**
10560 10561
Check if valid argument to innodb_file_format_max. This function
is registered as a callback with MySQL.
10562
@return	0 for valid file format */
10563 10564
static
int
10565 10566
innodb_file_format_max_validate(
/*============================*/
10567 10568
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
10569
						variable */
10570
	void*				save,	/*!< out: immediate result
10571
						for update function */
10572
	struct st_mysql_value*		value)	/*!< in: incoming string */
10573 10574 10575 10576
{
	const char*	file_format_input;
	char		buff[STRING_BUFFER_USUAL_SIZE];
	int		len = sizeof(buff);
10577
	int		format_id;
10578 10579 10580 10581 10582 10583 10584 10585

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

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

	if (file_format_input != NULL) {

10586 10587
		format_id = innobase_file_format_validate_and_set(
			file_format_input);
10588

10589 10590 10591 10592 10593 10594
		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);
10595

10596
			return(0);
10597

10598 10599 10600 10601 10602 10603 10604 10605 10606
		} else {
			push_warning_printf(thd,
			  MYSQL_ERROR::WARN_LEVEL_WARN,
			  ER_WRONG_ARGUMENTS,
			  "InnoDB: invalid innodb_file_format_max "
			  "value; can be any format up to %s "
			  "or equivalent id of %d",
			  trx_sys_file_format_id_to_name(DICT_TF_FORMAT_MAX),
			  DICT_TF_FORMAT_MAX);
10607 10608 10609
		}
	}

10610
	*static_cast<const char**>(save) = NULL;
10611 10612 10613
	return(1);
}

10614
/****************************************************************//**
10615
Update the system variable innodb_file_format_max using the "saved"
10616 10617
value. This function is registered as a callback with MySQL. */
static
10618
void
10619 10620
innodb_file_format_max_update(
/*==========================*/
10621 10622
	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
10623
							system variable */
10624
	void*				var_ptr,	/*!< out: where the
10625
							formal string goes */
10626
	const void*			save)		/*!< in: immediate result
10627 10628
							from check function */
{
10629 10630 10631
	const char*	format_name_in;
	const char**	format_name_out;
	uint		format_id;
10632 10633 10634 10635

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

10636 10637 10638 10639 10640 10641 10642 10643 10644 10645 10646 10647 10648 10649 10650 10651 10652 10653 10654
	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);
10655 10656

	/* Update the max format id in the system tablespace. */
10657
	if (trx_sys_file_format_max_set(format_id, format_name_out)) {
10658 10659 10660
		ut_print_timestamp(stderr);
		fprintf(stderr,
			" [Info] InnoDB: the file format in the system "
10661
			"tablespace is now set to %s.\n", *format_name_out);
10662 10663 10664
	}
}

10665
/****************************************************************//**
10666 10667 10668 10669 10670 10671
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(
/*==============================*/
10672 10673
	THD*				thd,		/*!< in: thread handle */
	struct st_mysql_sys_var*	var,		/*!< in: pointer to
10674
							system variable */
10675
	void*				var_ptr,	/*!< out: where the
10676
							formal string goes */
10677
	const void*			save)		/*!< in: immediate result
10678 10679 10680 10681 10682 10683 10684 10685 10686
							from check function */
{
	if (*(my_bool*) save) {
		btr_search_enable();
	} else {
		btr_search_disable();
	}
}

10687 10688 10689 10690 10691 10692 10693 10694 10695 10696 10697 10698 10699 10700 10701 10702 10703 10704 10705
/****************************************************************//**
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);
}

10706
/*************************************************************//**
10707 10708 10709 10710 10711 10712 10713 10714 10715 10716 10717 10718 10719 10720 10721 10722 10723 10724 10725 10726 10727 10728 10729 10730 10731 10732 10733 10734 10735
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
10736 10737
registered as a callback with MySQL.
@return	0 for valid innodb_change_buffering */
10738 10739 10740
static
int
innodb_change_buffering_validate(
10741
/*=============================*/
10742 10743
	THD*				thd,	/*!< in: thread handle */
	struct st_mysql_sys_var*	var,	/*!< in: pointer to system
10744
						variable */
10745
	void*				save,	/*!< out: immediate result
10746
						for update function */
10747
	struct st_mysql_value*		value)	/*!< in: incoming string */
10748 10749 10750 10751 10752 10753 10754 10755 10756 10757 10758
{
	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) {
10759
		ibuf_use_t	use;
10760

10761 10762 10763 10764 10765 10766 10767 10768 10769
		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);
10770 10771 10772
		}
	}

10773 10774
	/* No corresponding change buffering option for user supplied
	"change_buffering_input" */
10775 10776 10777
	return(1);
}

10778
/****************************************************************//**
10779 10780 10781 10782 10783
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(
10784
/*===========================*/
10785 10786 10787 10788 10789 10790 10791
	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 */
10792
{
10793 10794
	ibuf_use_t	use;

10795 10796 10797
	ut_a(var_ptr != NULL);
	ut_a(save != NULL);

10798 10799 10800 10801
	use = innodb_find_change_buffering_value(
		*static_cast<const char*const*>(save));

	ut_a(use < IBUF_USE_COUNT);
10802

10803 10804 10805
	ibuf_use = use;
	*static_cast<const char**>(var_ptr) =
		 *static_cast<const char*const*>(save);
10806 10807
}

10808 10809 10810 10811 10812 10813 10814 10815
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;
}

10816 10817 10818
/***********************************************************************
This function checks each index name for a table against reserved
system default primary index name 'GEN_CLUST_INDEX'. If a name matches,
10819 10820
this function pushes an warning message to the client, and returns true. */
extern "C" UNIV_INTERN
10821 10822 10823 10824 10825 10826
bool
innobase_index_name_is_reserved(
/*============================*/
					/* out: true if an index name
					matches the reserved name */
	const trx_t*	trx,		/* in: InnoDB transaction handle */
10827 10828 10829
	const KEY*	key_info,	/* in: Indexes to be created */
	ulint		num_of_keys)	/* in: Number of indexes to
					be created. */
10830
{
10831
	const KEY*	key;
10832 10833
	uint		key_num;	/* index number */

10834 10835
	for (key_num = 0; key_num < num_of_keys; key_num++) {
		key = &key_info[key_num];
10836 10837 10838 10839 10840

		if (innobase_strcasecmp(key->name,
					innobase_index_reserve_name) == 0) {
			/* Push warning to mysql */
			push_warning_printf((THD*) trx->mysql_thd,
10841 10842
					    MYSQL_ERROR::WARN_LEVEL_WARN,
					    ER_WRONG_NAME_FOR_INDEX,
10843 10844 10845 10846 10847 10848
					    "Cannot Create Index with name "
					    "'%s'. The name is reserved "
					    "for the system default primary "
					    "index.",
					    innobase_index_reserve_name);

10849 10850 10851
			my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0),
				 innobase_index_reserve_name);

10852 10853 10854 10855 10856 10857 10858
			return(true);
		}
	}

	return(false);
}

10859
static SHOW_VAR innodb_status_variables_export[]= {
10860 10861 10862 10863
  {"Innodb",                   (char*) &show_innodb_vars, SHOW_FUNC},
  {NullS, NullS, SHOW_LONG}
};

10864
static struct st_mysql_storage_engine innobase_storage_engine=
10865
{ MYSQL_HANDLERTON_INTERFACE_VERSION };
10866

10867 10868 10869 10870 10871 10872 10873 10874 10875 10876 10877 10878 10879 10880 10881 10882 10883 10884
/* 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);

10885 10886 10887 10888 10889
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);

10890 10891 10892 10893 10894 10895 10896 10897 10898 10899 10900 10901 10902 10903 10904 10905 10906
static MYSQL_SYSVAR_ULONG(purge_batch_size, srv_purge_batch_size,
  PLUGIN_VAR_OPCMDARG,
  "Number of UNDO logs to purge in one batch from the history list. "
  "Default is 20",
  NULL, NULL,
  20,			/* Default setting */
  1,			/* Minimum value */
  5000, 0);		/* Maximum value */

static MYSQL_SYSVAR_ULONG(purge_threads, srv_n_purge_threads,
  PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY,
  "Purge threads can be either 0 or 1. Default is 0.",
  NULL, NULL,
  0,			/* Default setting */
  0,			/* Minimum value */
  1, 0);		/* Maximum value */

10907 10908 10909
static MYSQL_SYSVAR_ULONG(fast_shutdown, innobase_fast_shutdown,
  PLUGIN_VAR_OPCMDARG,
  "Speeds up the shutdown process of the InnoDB storage engine. Possible "
10910 10911
  "values are 0, 1 (faster) or 2 (fastest - crash-like).",
  NULL, NULL, 1, 0, 2, 0);
10912

10913 10914
static MYSQL_SYSVAR_BOOL(file_per_table, srv_file_per_table,
  PLUGIN_VAR_NOCMDARG,
10915
  "Stores each InnoDB table to an .ibd file in the database dir.",
10916
  NULL, NULL, FALSE);
10917

10918 10919 10920
static MYSQL_SYSVAR_STR(file_format, innobase_file_format_name,
  PLUGIN_VAR_RQCMDARG,
  "File format to use for new tables in .ibd files.",
10921
  innodb_file_format_name_validate,
10922
  innodb_file_format_name_update, "Antelope");
10923

10924 10925 10926 10927 10928 10929 10930
/* "innobase_file_format_check" decides whether we would continue
booting the server if the file format stamped on the system
table space exceeds the maximum file format supported
by the server. Can be set during server startup at command
line or configure file, and a read only variable after
server startup */
static MYSQL_SYSVAR_BOOL(file_format_check, innobase_file_format_check,
10931
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
10932 10933 10934
  "Whether to perform system file format check.",
  NULL, NULL, TRUE);

10935 10936 10937 10938
/* 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. */
10939
static MYSQL_SYSVAR_STR(file_format_max, innobase_file_format_max,
10940 10941
  PLUGIN_VAR_OPCMDARG,
  "The highest file format in the tablespace.",
10942 10943
  innodb_file_format_max_validate,
  innodb_file_format_max_update, "Antelope");
10944

10945 10946 10947 10948 10949 10950 10951
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);

10952
static MYSQL_SYSVAR_STR(flush_method, innobase_file_flush_method,
10953 10954 10955 10956 10957 10958 10959 10960 10961 10962 10963 10964 10965 10966 10967 10968 10969 10970 10971 10972 10973 10974 10975 10976 10977
  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.",
10978 10979 10980 10981 10982 10983
  NULL, NULL, 75, 0, 99, 0);

static MYSQL_SYSVAR_BOOL(adaptive_flushing, srv_adaptive_flushing,
  PLUGIN_VAR_NOCMDARG,
  "Attempt flushing dirty pages to avoid IO bursts at checkpoints.",
  NULL, NULL, TRUE);
10984 10985 10986 10987 10988 10989 10990 10991 10992 10993 10994 10995 10996 10997 10998 10999 11000

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,
11001
  PLUGIN_VAR_OPCMDARG,
11002 11003 11004
  "Enable statistics gathering for metadata commands such as SHOW TABLE STATUS (on by default)",
  NULL, NULL, TRUE);

11005 11006 11007 11008 11009
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);

11010 11011
static MYSQL_SYSVAR_BOOL(adaptive_hash_index, btr_search_enabled,
  PLUGIN_VAR_OPCMDARG,
11012 11013
  "Enable InnoDB adaptive hash index (enabled by default).  "
  "Disable with --skip-innodb-adaptive-hash-index.",
11014
  NULL, innodb_adaptive_hash_index_update, TRUE);
11015 11016 11017 11018 11019 11020 11021

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);

11022 11023 11024
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.",
11025
  NULL, NULL, 8*1024*1024L, 512*1024L, LONG_MAX, 1024);
11026 11027 11028 11029 11030 11031 11032 11033 11034

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.",
11035
  NULL, NULL, 128*1024*1024L, 5*1024*1024L, LONGLONG_MAX, 1024*1024L);
11036

irana's avatar
irana committed
11037 11038 11039 11040 11041
static MYSQL_SYSVAR_LONG(buffer_pool_instances, innobase_buffer_pool_instances,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of buffer pool instances, set to higher value on high-end machines to increase scalability",
  NULL, NULL, 1L, 1L, MAX_BUFFER_POOLS, 1L);

11042
static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency,
11043 11044
  PLUGIN_VAR_RQCMDARG,
  "Helps in performance tuning in heavily concurrent environments.",
11045
  innobase_commit_concurrency_validate, NULL, 0, 0, 1000, 0);
11046 11047 11048 11049 11050 11051 11052

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,
11053
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY | PLUGIN_VAR_NOSYSVAR,
11054 11055 11056
  "Number of file I/O threads in InnoDB.",
  NULL, NULL, 4, 4, 64, 0);

11057 11058 11059 11060 11061 11062 11063 11064 11065 11066
static MYSQL_SYSVAR_ULONG(read_io_threads, innobase_read_io_threads,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of background read I/O threads in InnoDB.",
  NULL, NULL, 4, 1, 64, 0);

static MYSQL_SYSVAR_ULONG(write_io_threads, innobase_write_io_threads,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of background write I/O threads in InnoDB.",
  NULL, NULL, 4, 1, 64, 0);

11067 11068 11069 11070 11071 11072 11073 11074
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.",
11075
  NULL, NULL, 8*1024*1024L, 256*1024L, LONG_MAX, 1024);
11076 11077 11078 11079 11080 11081 11082 11083 11084 11085 11086 11087 11088 11089 11090 11091

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);

11092 11093 11094 11095 11096 11097 11098 11099 11100 11101 11102 11103
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);

11104 11105 11106
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.",
11107
  NULL, NULL, 300L, 10L, LONG_MAX, 0);
11108 11109 11110

static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds,
  PLUGIN_VAR_RQCMDARG,
11111 11112
  "Count of spin-loop rounds in InnoDB mutexes (30 by default)",
  NULL, NULL, 30L, 0L, ~0L, 0);
11113

11114 11115
static MYSQL_SYSVAR_ULONG(spin_wait_delay, srv_spin_wait_delay,
  PLUGIN_VAR_OPCMDARG,
11116 11117
  "Maximum delay between polling for a spin lock (6 by default)",
  NULL, NULL, 6L, 0L, ~0L, 0);
11118

11119 11120 11121
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.",
11122
  NULL, NULL, 0, 0, 1000, 0);
11123 11124 11125 11126 11127 11128 11129 11130 11131 11132 11133

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);

11134
static MYSQL_SYSVAR_LONG(autoinc_lock_mode, innobase_autoinc_lock_mode,
11135
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
11136 11137 11138 11139 11140
  "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)",
11141 11142 11143 11144 11145
  NULL, NULL,
  AUTOINC_NEW_STYLE_LOCKING,	/* Default setting */
  AUTOINC_OLD_STYLE_LOCKING,	/* Minimum value */
  AUTOINC_NO_LOCKING, 0);	/* Maximum value */

11146 11147 11148 11149
static MYSQL_SYSVAR_STR(version, innodb_version_str,
  PLUGIN_VAR_NOCMDOPT | PLUGIN_VAR_READONLY,
  "InnoDB version", NULL, NULL, INNODB_VERSION_STR);

11150 11151 11152
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",
11153
  NULL, NULL, TRUE);
11154

inaam's avatar
inaam committed
11155 11156 11157 11158 11159
static MYSQL_SYSVAR_BOOL(use_native_aio, srv_use_native_aio,
  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
  "Use native AIO if supported on this platform.",
  NULL, NULL, TRUE);

11160 11161 11162 11163 11164
static MYSQL_SYSVAR_STR(change_buffering, innobase_change_buffering,
  PLUGIN_VAR_RQCMDARG,
  "Buffer changes to reduce random access: "
  "OFF, ON, inserting, deleting, changing, or purging.",
  innodb_change_buffering_validate,
11165
  innodb_change_buffering_update, "all");
11166

11167 11168 11169 11170 11171 11172 11173
#if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG
static MYSQL_SYSVAR_UINT(change_buffering_debug, ibuf_debug,
  PLUGIN_VAR_RQCMDARG,
  "Debug flags for InnoDB change buffering (0=none)",
  NULL, NULL, 0, 0, 1, 0);
#endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */

11174 11175
static MYSQL_SYSVAR_ULONG(read_ahead_threshold, srv_read_ahead_threshold,
  PLUGIN_VAR_RQCMDARG,
11176
  "Number of pages that must be accessed sequentially for InnoDB to "
11177 11178 11179
  "trigger a readahead.",
  NULL, NULL, 56, 0, 64, 0);

11180 11181 11182 11183
static struct st_mysql_sys_var* innobase_system_variables[]= {
  MYSQL_SYSVAR(additional_mem_pool_size),
  MYSQL_SYSVAR(autoextend_increment),
  MYSQL_SYSVAR(buffer_pool_size),
irana's avatar
irana committed
11184
  MYSQL_SYSVAR(buffer_pool_instances),
11185 11186 11187 11188 11189 11190 11191 11192
  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),
11193 11194
  MYSQL_SYSVAR(read_io_threads),
  MYSQL_SYSVAR(write_io_threads),
11195
  MYSQL_SYSVAR(file_per_table),
11196 11197
  MYSQL_SYSVAR(file_format),
  MYSQL_SYSVAR(file_format_check),
11198
  MYSQL_SYSVAR(file_format_max),
11199 11200 11201 11202 11203 11204 11205 11206 11207 11208 11209 11210 11211 11212
  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),
11213
  MYSQL_SYSVAR(adaptive_flushing),
11214 11215
  MYSQL_SYSVAR(max_purge_lag),
  MYSQL_SYSVAR(mirrored_log_groups),
11216 11217
  MYSQL_SYSVAR(old_blocks_pct),
  MYSQL_SYSVAR(old_blocks_time),
11218 11219 11220
  MYSQL_SYSVAR(open_files),
  MYSQL_SYSVAR(rollback_on_timeout),
  MYSQL_SYSVAR(stats_on_metadata),
11221
  MYSQL_SYSVAR(stats_sample_pages),
11222
  MYSQL_SYSVAR(adaptive_hash_index),
11223
  MYSQL_SYSVAR(replication_delay),
11224
  MYSQL_SYSVAR(status_file),
11225
  MYSQL_SYSVAR(strict_mode),
11226 11227
  MYSQL_SYSVAR(support_xa),
  MYSQL_SYSVAR(sync_spin_loops),
11228
  MYSQL_SYSVAR(spin_wait_delay),
11229 11230 11231
  MYSQL_SYSVAR(table_locks),
  MYSQL_SYSVAR(thread_concurrency),
  MYSQL_SYSVAR(thread_sleep_delay),
11232
  MYSQL_SYSVAR(autoinc_lock_mode),
11233
  MYSQL_SYSVAR(version),
11234
  MYSQL_SYSVAR(use_sys_malloc),
inaam's avatar
inaam committed
11235
  MYSQL_SYSVAR(use_native_aio),
11236
  MYSQL_SYSVAR(change_buffering),
11237 11238 11239
#if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG
  MYSQL_SYSVAR(change_buffering_debug),
#endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */
11240 11241
  MYSQL_SYSVAR(read_ahead_threshold),
  MYSQL_SYSVAR(io_capacity),
11242 11243
  MYSQL_SYSVAR(purge_threads),
  MYSQL_SYSVAR(purge_batch_size),
11244 11245 11246
  NULL
};

11247 11248 11249
mysql_declare_plugin(innobase)
{
  MYSQL_STORAGE_ENGINE_PLUGIN,
11250
  &innobase_storage_engine,
11251
  innobase_hton_name,
11252
  "Innobase Oy",
11253
  "Supports transactions, row-level locking, and foreign keys",
11254
  PLUGIN_LICENSE_GPL,
11255
  innobase_init, /* Plugin Init */
11256
  NULL, /* Plugin Deinit */
11257
  INNODB_VERSION_SHORT,
11258
  innodb_status_variables_export,/* status variables             */
11259 11260
  innobase_system_variables, /* system variables */
  NULL /* reserved */
11261
},
11262 11263
i_s_innodb_trx,
i_s_innodb_locks,
11264
i_s_innodb_lock_waits,
11265 11266 11267
i_s_innodb_cmp,
i_s_innodb_cmp_reset,
i_s_innodb_cmpmem,
11268
i_s_innodb_cmpmem_reset
11269
mysql_declare_plugin_end;
vasil's avatar
vasil committed
11270

11271 11272 11273 11274 11275 11276 11277 11278 11279 11280 11281 11282 11283 11284 11285 11286 11287 11288
/** @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;
}

vasil's avatar
vasil committed
11289 11290 11291 11292 11293 11294 11295 11296 11297 11298 11299 11300 11301 11302 11303 11304 11305 11306 11307 11308 11309 11310 11311 11312 11313 11314 11315 11316 11317 11318 11319 11320 11321 11322 11323 11324 11325 11326 11327 11328 11329 11330 11331 11332 11333 11334 11335 11336 11337 11338 11339 11340 11341 11342 11343 11344 11345 11346 11347 11348 11349 11350 11351 11352 11353 11354 11355 11356 11357 11358 11359 11360 11361 11362 11363 11364 11365 11366 11367 11368 11369 11370 11371 11372 11373 11374 11375 11376 11377 11378 11379 11380 11381 11382 11383 11384 11385 11386 11387 11388 11389 11390 11391 11392 11393 11394 11395 11396 11397 11398 11399 11400 11401 11402 11403 11404 11405 11406 11407 11408 11409
#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 */