ha_innodb.cc 259 KB
Newer Older
osku's avatar
osku committed
1 2 3 4
/* Copyright (C) 2000-2005 MySQL AB & Innobase Oy

   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
marko's avatar
marko committed
5
   the Free Software Foundation; version 2 of the License.
osku's avatar
osku committed
6 7 8

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
9
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
osku's avatar
osku committed
10 11 12 13
   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
14
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307	 USA */
osku's avatar
osku committed
15 16 17

/* This file defines the InnoDB handler: the interface between MySQL and InnoDB
NOTE: You can only use noninlined InnoDB functions in this file, because we
vasil's avatar
vasil committed
18
have disabled the InnoDB inlining in this file. */
osku's avatar
osku committed
19 20

/* TODO list for the InnoDB handler in 5.0:
21
  - Remove the flag trx->active_trans and look at trx->conc_state
osku's avatar
osku committed
22 23 24 25 26 27 28 29 30 31
  - 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

marko's avatar
marko committed
32
#include <mysql_priv.h>
33
#include <mysqld_error.h>
osku's avatar
osku committed
34 35 36 37 38 39 40

#include <m_ctype.h>
#include <hash.h>
#include <myisampack.h>
#include <mysys_err.h>
#include <my_sys.h>
#include "ha_innodb.h"
41 42 43 44 45 46 47 48 49 50
#include <mysql/plugin.h>

/** to protect innobase_open_files */
static pthread_mutex_t innobase_share_mutex;
/** to force correct commit order in binlog */
static pthread_mutex_t prepare_commit_mutex;
static ulong commit_threads = 0;
static pthread_mutex_t commit_threads_m;
static pthread_cond_t commit_cond;
static pthread_mutex_t commit_cond_m;
vasil's avatar
vasil committed
51
static pthread_mutex_t analyze_mutex;
52
static bool innodb_inited = 0;
osku's avatar
osku committed
53

54 55 56 57
/*
  This needs to exist until the query cache callback is removed
  or learns to pass hton.
*/
58
static handlerton *innodb_hton_ptr;
59

osku's avatar
osku committed
60 61 62 63
#define INSIDE_HA_INNOBASE_CC

/* Include necessary InnoDB headers */
extern "C" {
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
#include "../storage/innobase/include/univ.i"
#include "../storage/innobase/include/os0file.h"
#include "../storage/innobase/include/os0thread.h"
#include "../storage/innobase/include/srv0start.h"
#include "../storage/innobase/include/srv0srv.h"
#include "../storage/innobase/include/trx0roll.h"
#include "../storage/innobase/include/trx0trx.h"
#include "../storage/innobase/include/trx0sys.h"
#include "../storage/innobase/include/mtr0mtr.h"
#include "../storage/innobase/include/row0ins.h"
#include "../storage/innobase/include/row0mysql.h"
#include "../storage/innobase/include/row0sel.h"
#include "../storage/innobase/include/row0upd.h"
#include "../storage/innobase/include/log0log.h"
#include "../storage/innobase/include/lock0lock.h"
#include "../storage/innobase/include/dict0crea.h"
#include "../storage/innobase/include/btr0cur.h"
#include "../storage/innobase/include/btr0btr.h"
#include "../storage/innobase/include/fsp0fsp.h"
#include "../storage/innobase/include/sync0sync.h"
#include "../storage/innobase/include/fil0fil.h"
#include "../storage/innobase/include/trx0xa.h"
#include "../storage/innobase/include/thr0loc.h"
#include "../storage/innobase/include/ha_prototypes.h"
osku's avatar
osku committed
88 89
}

90 91 92 93
static const long AUTOINC_OLD_STYLE_LOCKING = 0;
static const long AUTOINC_NEW_STYLE_LOCKING = 1;
static const long AUTOINC_NO_LOCKING = 2;

94
static long innobase_mirrored_log_groups, innobase_log_files_in_group,
95 96 97
	innobase_log_buffer_size, innobase_buffer_pool_awe_mem_mb,
	innobase_additional_mem_pool_size, innobase_file_io_threads,
	innobase_lock_wait_timeout, innobase_force_recovery,
98
	innobase_open_files, innobase_autoinc_lock_mode;
99
static ulong innobase_commit_concurrency = 0;
100

101
static long long innobase_buffer_pool_size, innobase_log_file_size;
osku's avatar
osku committed
102 103 104

/* The default values for the following char* start-up parameters
are determined in innobase_init below: */
105

106 107 108
static char*	innobase_data_home_dir			= NULL;
static char*	innobase_data_file_path			= NULL;
static char*	innobase_log_group_home_dir		= NULL;
osku's avatar
osku committed
109 110
/* The following has a misleading name: starting from 4.0.5, this also
affects Windows: */
111
static char*	innobase_unix_file_flush_method		= NULL;
osku's avatar
osku committed
112 113 114 115

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

116 117 118 119 120 121 122 123 124 125 126
static ulong	innobase_fast_shutdown			= 1;
#ifdef UNIV_LOG_ARCHIVE
static my_bool	innobase_log_archive			= FALSE;
static char*	innobase_log_arch_dir			= NULL;
#endif /* UNIV_LOG_ARCHIVE */
static my_bool	innobase_use_doublewrite		= TRUE;
static my_bool	innobase_use_checksums			= TRUE;
static my_bool	innobase_file_per_table			= FALSE;
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;
vasil's avatar
vasil committed
127
static my_bool	innobase_stats_on_metadata		= TRUE;
vasil's avatar
vasil committed
128
static my_bool	innobase_adaptive_hash_index	= TRUE;
osku's avatar
osku committed
129

130
static char*	internal_innobase_data_file_path	= NULL;
osku's avatar
osku committed
131 132 133 134 135 136 137

/* 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
marko's avatar
marko committed
138
static ulong	innobase_active_counter	= 0;
osku's avatar
osku committed
139

140
static HASH	innobase_open_tables;
osku's avatar
osku committed
141

142
#ifdef __NETWARE__	/* some special cleanup for NetWare */
osku's avatar
osku committed
143 144 145
bool nw_panic = FALSE;
#endif

146
static uchar* innobase_get_key(INNOBASE_SHARE *share, size_t *length,
147
	my_bool not_used __attribute__((unused)));
osku's avatar
osku committed
148 149
static INNOBASE_SHARE *get_share(const char *table_name);
static void free_share(INNOBASE_SHARE *share);
150 151 152
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);
153
static int innobase_rollback_to_savepoint(handlerton *hton, THD* thd,
154 155
           void *savepoint);
static int innobase_savepoint(handlerton *hton, THD* thd, void *savepoint);
156
static int innobase_release_savepoint(handlerton *hton, THD* thd,
157 158 159
           void *savepoint);
static handler *innobase_create_handler(handlerton *hton,
                                        TABLE_SHARE *table,
marko's avatar
marko committed
160
                                        MEM_ROOT *mem_root);
osku's avatar
osku committed
161

162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
/***********************************************************************
This function checks each index name for a table against reserved
system default primary index name 'GEN_CLUST_INDEX'. If a name matches,
this function pushes an error message to the client, and returns true. */
static
bool
innobase_index_name_is_reserved(
/*============================*/
					/* out: true if index name matches a
					reserved name */
	const trx_t*	trx,		/* in: InnoDB transaction handle */
	const TABLE*	form,		/* in: information on table
					columns and indexes */
	const char*	norm_name);	/* in: table name */

177
static const char innobase_hton_name[]= "InnoDB";
osku's avatar
osku committed
178

179 180 181 182
/* "GEN_CLUST_INDEX" is the name reserved for Innodb default
system primary index. */
static const char innobase_index_reserve_name[]= "GEN_CLUST_INDEX";

183 184 185 186 187 188 189 190 191 192 193 194 195 196
/** @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);
/*==========================================*/

197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
/*****************************************************************
Check for a valid value of innobase_commit_concurrency. */
static
int
innobase_commit_concurrency_validate(
/*=================================*/
						/* out: 0 for valid
						innodb_commit_concurrency */
	THD*				thd,	/* in: thread handle */
	struct st_mysql_sys_var*	var,	/* in: pointer to system
						variable */
	void*				save,	/* out: immediate result
						for update function */
	struct st_mysql_value*		value)	/* in: incoming string */
{
	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));
}
229 230 231 232 233 234 235 236 237 238 239

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);

240
static handler *innobase_create_handler(handlerton *hton,
vdimov's avatar
vdimov committed
241
                                        TABLE_SHARE *table,
242
                                        MEM_ROOT *mem_root)
osku's avatar
osku committed
243
{
244
  return new (mem_root) ha_innobase(hton, table);
osku's avatar
osku committed
245 246
}

247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352
/***********************************************************************
This function is used to prepare X/Open XA distributed transaction   */
static
int
innobase_xa_prepare(
/*================*/
			/* out: 0 or error number */
	handlerton* hton,
	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   */
static
int
innobase_xa_recover(
/*================*/
				/* out: number of prepared transactions
				stored in xid_list */
	handlerton* hton,
	XID*	xid_list,	/* in/out: prepared transactions */
	uint	len);		/* in: number of slots in xid_list */
/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */
static
int
innobase_commit_by_xid(
/*===================*/
			/* out: 0 or error number */
	handlerton* hton,
	XID*	xid);	/* in: X/Open XA transaction identification */
/***********************************************************************
This function is used to rollback one X/Open XA distributed transaction
which is in the prepared state */
static
int
innobase_rollback_by_xid(
/*=====================*/
			/* out: 0 or error number */
	handlerton* hton,
	XID	*xid);	/* in: X/Open XA transaction identification */
/***********************************************************************
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
using a cursor. */
static
void*
innobase_create_cursor_view(
/*========================*/
				/* out: pointer to cursor view or NULL */
	handlerton*	hton,	/* in: innobase hton */
	THD*		thd);	/* in: user thread handle */
/***********************************************************************
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,
	THD*	thd,	/* in: user thread handle */
	void*	curview);/* in: Consistent cursor view to be set */
/***********************************************************************
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,
	THD*	thd,	/* in: user thread handle */
	void*	curview);/* in: Consistent read view to be closed */
/*********************************************************************
Removes all tables in the named database inside InnoDB. */
static
void
innobase_drop_database(
/*===================*/
			/* out: error number */
	handlerton* hton, /* in: handlerton of Innodb */
	char*	path);	/* in: database path; inside InnoDB the name
			of the last directory in the path is used as
			the database name: for example, in 'mysql/data/test'
			the database name is 'test' */
/***********************************************************************
Closes an InnoDB database. */
static
int
innobase_end(handlerton *hton, ha_panic_function type);

/*********************************************************************
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
have one. */
static
int
innobase_start_trx_and_assign_read_view(
/*====================================*/
			/* out: 0 */
353
	handlerton* hton, /* in: Innodb handlerton */
354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379
	THD*	thd);	/* in: MySQL thread handle of the user for whom
			the transaction should be committed */
/********************************************************************
Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
the logs, and the name of this function should be innobase_checkpoint. */
static
bool
innobase_flush_logs(
/*================*/
				/* out: TRUE if error */
	handlerton*	hton);	/* in: InnoDB handlerton */

/****************************************************************************
Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
Monitor to the client. */
static
bool
innodb_show_status(
/*===============*/
	handlerton*	hton,	/* in: the innodb handlerton */
	THD*	thd,	/* in: the MySQL query thread of the caller */
	stat_print_fn *stat_print);
static
bool innobase_show_status(handlerton *hton, THD* thd, 
                          stat_print_fn* stat_print,
                          enum ha_stat_type stat_type);
osku's avatar
osku committed
380

osku's avatar
osku committed
381 382
/*********************************************************************
Commits a transaction in an InnoDB database. */
383
static
osku's avatar
osku committed
384 385 386 387 388
void
innobase_commit_low(
/*================*/
	trx_t*	trx);	/* in: transaction handle */

389
static SHOW_VAR innodb_status_variables[]= {
osku's avatar
osku committed
390
  {"buffer_pool_pages_data",
391
  (char*) &export_vars.innodb_buffer_pool_pages_data,	  SHOW_LONG},
osku's avatar
osku committed
392
  {"buffer_pool_pages_dirty",
393
  (char*) &export_vars.innodb_buffer_pool_pages_dirty,	  SHOW_LONG},
osku's avatar
osku committed
394 395 396
  {"buffer_pool_pages_flushed",
  (char*) &export_vars.innodb_buffer_pool_pages_flushed,  SHOW_LONG},
  {"buffer_pool_pages_free",
397
  (char*) &export_vars.innodb_buffer_pool_pages_free,	  SHOW_LONG},
vasil's avatar
vasil committed
398
#ifdef UNIV_DEBUG
osku's avatar
osku committed
399 400
  {"buffer_pool_pages_latched",
  (char*) &export_vars.innodb_buffer_pool_pages_latched,  SHOW_LONG},
vasil's avatar
vasil committed
401
#endif /* UNIV_DEBUG */
osku's avatar
osku committed
402
  {"buffer_pool_pages_misc",
403
  (char*) &export_vars.innodb_buffer_pool_pages_misc,	  SHOW_LONG},
osku's avatar
osku committed
404
  {"buffer_pool_pages_total",
405
  (char*) &export_vars.innodb_buffer_pool_pages_total,	  SHOW_LONG},
osku's avatar
osku committed
406 407 408 409 410 411 412
  {"buffer_pool_read_ahead_rnd",
  (char*) &export_vars.innodb_buffer_pool_read_ahead_rnd, SHOW_LONG},
  {"buffer_pool_read_ahead_seq",
  (char*) &export_vars.innodb_buffer_pool_read_ahead_seq, SHOW_LONG},
  {"buffer_pool_read_requests",
  (char*) &export_vars.innodb_buffer_pool_read_requests,  SHOW_LONG},
  {"buffer_pool_reads",
413
  (char*) &export_vars.innodb_buffer_pool_reads,	  SHOW_LONG},
osku's avatar
osku committed
414
  {"buffer_pool_wait_free",
415
  (char*) &export_vars.innodb_buffer_pool_wait_free,	  SHOW_LONG},
osku's avatar
osku committed
416 417 418
  {"buffer_pool_write_requests",
  (char*) &export_vars.innodb_buffer_pool_write_requests, SHOW_LONG},
  {"data_fsyncs",
419
  (char*) &export_vars.innodb_data_fsyncs,		  SHOW_LONG},
osku's avatar
osku committed
420
  {"data_pending_fsyncs",
421
  (char*) &export_vars.innodb_data_pending_fsyncs,	  SHOW_LONG},
osku's avatar
osku committed
422
  {"data_pending_reads",
423
  (char*) &export_vars.innodb_data_pending_reads,	  SHOW_LONG},
osku's avatar
osku committed
424
  {"data_pending_writes",
425
  (char*) &export_vars.innodb_data_pending_writes,	  SHOW_LONG},
osku's avatar
osku committed
426
  {"data_read",
427
  (char*) &export_vars.innodb_data_read,		  SHOW_LONG},
osku's avatar
osku committed
428
  {"data_reads",
429
  (char*) &export_vars.innodb_data_reads,		  SHOW_LONG},
osku's avatar
osku committed
430
  {"data_writes",
431
  (char*) &export_vars.innodb_data_writes,		  SHOW_LONG},
osku's avatar
osku committed
432
  {"data_written",
433
  (char*) &export_vars.innodb_data_written,		  SHOW_LONG},
osku's avatar
osku committed
434
  {"dblwr_pages_written",
435
  (char*) &export_vars.innodb_dblwr_pages_written,	  SHOW_LONG},
osku's avatar
osku committed
436
  {"dblwr_writes",
437
  (char*) &export_vars.innodb_dblwr_writes,		  SHOW_LONG},
osku's avatar
osku committed
438
  {"log_waits",
439
  (char*) &export_vars.innodb_log_waits,		  SHOW_LONG},
osku's avatar
osku committed
440
  {"log_write_requests",
441
  (char*) &export_vars.innodb_log_write_requests,	  SHOW_LONG},
osku's avatar
osku committed
442
  {"log_writes",
443
  (char*) &export_vars.innodb_log_writes,		  SHOW_LONG},
osku's avatar
osku committed
444
  {"os_log_fsyncs",
445
  (char*) &export_vars.innodb_os_log_fsyncs,		  SHOW_LONG},
osku's avatar
osku committed
446
  {"os_log_pending_fsyncs",
447
  (char*) &export_vars.innodb_os_log_pending_fsyncs,	  SHOW_LONG},
osku's avatar
osku committed
448
  {"os_log_pending_writes",
449
  (char*) &export_vars.innodb_os_log_pending_writes,	  SHOW_LONG},
osku's avatar
osku committed
450
  {"os_log_written",
451
  (char*) &export_vars.innodb_os_log_written,		  SHOW_LONG},
osku's avatar
osku committed
452
  {"page_size",
453
  (char*) &export_vars.innodb_page_size,		  SHOW_LONG},
osku's avatar
osku committed
454
  {"pages_created",
455
  (char*) &export_vars.innodb_pages_created,		  SHOW_LONG},
osku's avatar
osku committed
456
  {"pages_read",
457
  (char*) &export_vars.innodb_pages_read,		  SHOW_LONG},
osku's avatar
osku committed
458
  {"pages_written",
459
  (char*) &export_vars.innodb_pages_written,		  SHOW_LONG},
osku's avatar
osku committed
460
  {"row_lock_current_waits",
461
  (char*) &export_vars.innodb_row_lock_current_waits,	  SHOW_LONG},
osku's avatar
osku committed
462
  {"row_lock_time",
463
  (char*) &export_vars.innodb_row_lock_time,		  SHOW_LONGLONG},
osku's avatar
osku committed
464
  {"row_lock_time_avg",
465
  (char*) &export_vars.innodb_row_lock_time_avg,	  SHOW_LONG},
osku's avatar
osku committed
466
  {"row_lock_time_max",
467
  (char*) &export_vars.innodb_row_lock_time_max,	  SHOW_LONG},
osku's avatar
osku committed
468
  {"row_lock_waits",
469
  (char*) &export_vars.innodb_row_lock_waits,		  SHOW_LONG},
osku's avatar
osku committed
470
  {"rows_deleted",
471
  (char*) &export_vars.innodb_rows_deleted,		  SHOW_LONG},
osku's avatar
osku committed
472
  {"rows_inserted",
473
  (char*) &export_vars.innodb_rows_inserted,		  SHOW_LONG},
osku's avatar
osku committed
474
  {"rows_read",
475
  (char*) &export_vars.innodb_rows_read,		  SHOW_LONG},
osku's avatar
osku committed
476
  {"rows_updated",
477
  (char*) &export_vars.innodb_rows_updated,		  SHOW_LONG},
marko's avatar
marko committed
478 479
  {NullS, NullS, SHOW_LONG}
};
osku's avatar
osku committed
480 481 482

/* General functions */

483 484 485 486 487 488 489 490 491 492 493 494 495
/**********************************************************************
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
srv_conc_force_exit_innodb(). */
extern "C"
ibool
thd_is_replication_slave_thread(
/*============================*/
			/* out: true if thd is the replication thread */
	void*	thd)	/* in: thread handle (THD*) */
{
496
	return((ibool) thd_slave_thread((THD*) thd));
497 498
}

osku's avatar
osku committed
499 500 501 502 503 504 505 506 507
/**********************************************************************
Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
inline
void
innodb_srv_conc_enter_innodb(
/*=========================*/
	trx_t*	trx)	/* in: transaction handle */
{
marko's avatar
marko committed
508
	if (UNIV_LIKELY(!srv_thread_concurrency)) {
osku's avatar
osku committed
509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524

		return;
	}

	srv_conc_enter_innodb(trx);
}

/**********************************************************************
Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
inline
void
innodb_srv_conc_exit_innodb(
/*========================*/
	trx_t*	trx)	/* in: transaction handle */
{
inaam's avatar
inaam committed
525
	if (UNIV_LIKELY(!trx->declared_to_be_inside_innodb)) {
osku's avatar
osku committed
526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554

		return;
	}

	srv_conc_exit_innodb(trx);
}

/**********************************************************************
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. */
inline
void
innobase_release_stat_resources(
/*============================*/
	trx_t*	trx)	/* in: transaction object */
{
	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);
	}
}

555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570
/**********************************************************************
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
rolling back transactions that have edited non-transactional tables. */
extern "C"
ibool
thd_has_edited_nontrans_tables(
/*===========================*/
			/* out: true if non-transactional tables have
			been edited */
	void*	thd)	/* in: thread handle (THD*) */
{
	return((ibool) thd_non_transactional_update((THD*) thd));
}

571 572 573 574 575 576 577 578 579 580 581 582
/**********************************************************************
Returns true if the thread is executing a SELECT statement. */
extern "C"
ibool
thd_is_select(
/*==========*/
				/* out: true if thd is executing SELECT */
	const void*	thd)	/* in: thread handle (THD*) */
{
	return(thd_sql_command((const THD*) thd) == SQLCOM_SELECT);
}

583 584 585
/************************************************************************
Obtain the InnoDB transaction of a MySQL thread. */
inline
586
trx_t*
587 588
thd_to_trx(
/*=======*/
589 590
			/* out: reference to transaction pointer */
	THD*	thd)	/* in: MySQL thread */
591
{
592
	return((trx_t*) thd_get_ha_data(thd, innodb_hton_ptr));
593 594
}

osku's avatar
osku committed
595 596 597 598
/************************************************************************
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
documentation, see handler.cc. */
599
static
osku's avatar
osku committed
600
int
osku's avatar
osku committed
601 602
innobase_release_temporary_latches(
/*===============================*/
603 604 605
				/* out: 0 */
	handlerton*	hton,	/* in: handlerton */
	THD*		thd)	/* in: MySQL thread */
osku's avatar
osku committed
606 607 608
{
	trx_t*	trx;

609 610
	DBUG_ASSERT(hton == innodb_hton_ptr);

osku's avatar
osku committed
611
	if (!innodb_inited) {
612

osku's avatar
osku committed
613
		return 0;
osku's avatar
osku committed
614 615
	}

616
	trx = thd_to_trx(thd);
osku's avatar
osku committed
617 618

	if (trx) {
619
		innobase_release_stat_resources(trx);
osku's avatar
osku committed
620
	}
osku's avatar
osku committed
621
	return 0;
osku's avatar
osku committed
622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
}

/************************************************************************
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. */
inline
void
innobase_active_small(void)
/*=======================*/
{
	innobase_active_counter++;

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

/************************************************************************
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
timeout or a deadlock. */
static
int
convert_error_code_to_mysql(
/*========================*/
			/* out: MySQL error code */
	int	error,	/* in: InnoDB error code */
	THD*	thd)	/* in: user thread handle or NULL */
{
	if (error == DB_SUCCESS) {

		return(0);

657
	} else if (error == (int) DB_DUPLICATE_KEY) {
osku's avatar
osku committed
658

659 660 661 662 663 664
		/* 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. */
665
		return(HA_ERR_FOUND_DUPP_KEY);
osku's avatar
osku committed
666

667
	} else if (error == (int) DB_FOREIGN_DUPLICATE_KEY) {
668 669 670

		return(HA_ERR_FOREIGN_DUPLICATE_KEY);

671
	} else if (error == (int) DB_RECORD_NOT_FOUND) {
osku's avatar
osku committed
672

673
		return(HA_ERR_NO_ACTIVE_RECORD);
osku's avatar
osku committed
674

675
	} else if (error == (int) DB_ERROR) {
osku's avatar
osku committed
676

677
		return(-1); /* unspecified error */
osku's avatar
osku committed
678

679 680 681 682
	} else if (error == (int) DB_DEADLOCK) {
		/* 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
683

684 685 686
		if (thd) {
			thd_mark_transaction_to_rollback(thd, TRUE);
		}
osku's avatar
osku committed
687

688 689
		return(HA_ERR_LOCK_DEADLOCK);
	} else if (error == (int) DB_LOCK_WAIT_TIMEOUT) {
osku's avatar
osku committed
690 691 692 693 694

		/* 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. */

695 696 697 698
		if (thd) {
			thd_mark_transaction_to_rollback(
				thd, (bool)row_rollback_on_timeout);
		}
osku's avatar
osku committed
699

700
		return(HA_ERR_LOCK_WAIT_TIMEOUT);
osku's avatar
osku committed
701

702
	} else if (error == (int) DB_NO_REFERENCED_ROW) {
osku's avatar
osku committed
703

704
		return(HA_ERR_NO_REFERENCED_ROW);
osku's avatar
osku committed
705

706
	} else if (error == (int) DB_ROW_IS_REFERENCED) {
osku's avatar
osku committed
707

708
		return(HA_ERR_ROW_IS_REFERENCED);
osku's avatar
osku committed
709

710 711 712
	} else if (error == (int) DB_CANNOT_ADD_CONSTRAINT
		   || error == (int) DB_FOREIGN_NO_INDEX
		   || error == (int) DB_REFERENCING_NO_INDEX) {
osku's avatar
osku committed
713

714
		return(HA_ERR_CANNOT_ADD_FOREIGN);
osku's avatar
osku committed
715

716
	} else if (error == (int) DB_CANNOT_DROP_CONSTRAINT) {
osku's avatar
osku committed
717

718
		return(HA_ERR_ROW_IS_REFERENCED); /* TODO: This is a bit
osku's avatar
osku committed
719 720
						misleading, a new MySQL error
						code should be introduced */
721
	} else if (error == (int) DB_COL_APPEARS_TWICE_IN_INDEX) {
osku's avatar
osku committed
722

723
		return(HA_ERR_CRASHED);
osku's avatar
osku committed
724

725
	} else if (error == (int) DB_OUT_OF_FILE_SPACE) {
osku's avatar
osku committed
726

727
		return(HA_ERR_RECORD_FILE_FULL);
osku's avatar
osku committed
728

729
	} else if (error == (int) DB_TABLE_IS_BEING_USED) {
osku's avatar
osku committed
730

731
		return(HA_ERR_WRONG_COMMAND);
osku's avatar
osku committed
732

733
	} else if (error == (int) DB_TABLE_NOT_FOUND) {
osku's avatar
osku committed
734

735
		return(HA_ERR_NO_SUCH_TABLE);
osku's avatar
osku committed
736

737
	} else if (error == (int) DB_TOO_BIG_RECORD) {
osku's avatar
osku committed
738

739
		return(HA_ERR_TO_BIG_ROW);
osku's avatar
osku committed
740

741
	} else if (error == (int) DB_CORRUPTION) {
osku's avatar
osku committed
742

743 744
		return(HA_ERR_CRASHED);
	} else if (error == (int) DB_NO_SAVEPOINT) {
osku's avatar
osku committed
745

746 747
		return(HA_ERR_NO_SAVEPOINT);
	} else if (error == (int) DB_LOCK_TABLE_FULL) {
marko's avatar
marko committed
748 749 750 751
 		/* 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 */

752 753 754
		if (thd) {
			thd_mark_transaction_to_rollback(thd, TRUE);
		}
marko's avatar
marko committed
755 756

    		return(HA_ERR_LOCK_TABLE_FULL);
757 758
	} else if (error == DB_TOO_MANY_CONCURRENT_TRXS) {

759
		return(HA_ERR_TOO_MANY_CONCURRENT_TRXS);
760

761 762 763
	} else if (error == DB_UNSUPPORTED) {

		return(HA_ERR_UNSUPPORTED);
764 765 766 767
	} else if (error == DB_INTERRUPTED) {

		my_error(ER_QUERY_INTERRUPTED, MYF(0));
		return(-1);
768 769 770 771 772 773 774 775 776 777
	} else if (error == 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);
		return(-1);
marko's avatar
marko committed
778 779 780
    	} else {
    		return(-1);			// Unknown error
    	}
osku's avatar
osku committed
781 782 783 784 785 786 787 788 789 790
}

/*****************************************************************
Prints info of a THD object (== user session thread) to the given file.
NOTE that /mysql/innobase/trx/trx0trx.c must contain the prototype for
this function! */
extern "C"
void
innobase_mysql_print_thd(
/*=====================*/
791 792
	FILE*	f,		/* in: output stream */
	void*	input_thd,	/* in: pointer to a MySQL THD object */
osku's avatar
osku committed
793 794 795
	uint	max_query_len)	/* in: max query length to print, or 0 to
				   use the default max length */
{
796 797
	THD*	thd;
	char	buffer[1024];
osku's avatar
osku committed
798

799 800 801
	thd = (THD*) input_thd;
	fputs(thd_security_context(thd, buffer, sizeof(buffer), 
				   max_query_len), f);
osku's avatar
osku committed
802 803 804 805 806 807 808
	putc('\n', f);
}

/**********************************************************************
Get the variable length bounds of the given character set.

NOTE that the exact prototype of this function has to be in
809
/innobase/include/data0type.ic! */
osku's avatar
osku committed
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
extern "C"
void
innobase_get_cset_width(
/*====================*/
	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) */
{
	CHARSET_INFO*	cs;
	ut_ad(cset < 256);
	ut_ad(mbminlen);
	ut_ad(mbmaxlen);

	cs = all_charsets[cset];
	if (cs) {
		*mbminlen = cs->mbminlen;
		*mbmaxlen = cs->mbmaxlen;
	} else {
calvin's avatar
calvin committed
828 829 830 831 832 833 834 835 836
		if (current_thd
		    && (thd_sql_command(current_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(
vasil's avatar
vasil committed
837
					"Unknown collation #%lu.", cset);
calvin's avatar
calvin committed
838 839 840 841 842 843
			}
		} else {

			ut_a(cset == 0);
		}

osku's avatar
osku committed
844 845 846 847
		*mbminlen = *mbmaxlen = 0;
	}
}

848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
/**********************************************************************
Converts an identifier to a table name.

NOTE that the exact prototype of this function has to be in
/innobase/dict/dict0dict.c! */
extern "C"
void
innobase_convert_from_table_id(
/*===========================*/
	char*		to,	/* out: converted identifier */
	const char*	from,	/* in: identifier to convert */
	ulint		len)	/* in: length of 'to', in bytes */
{
	uint	errors;

863
	strconvert(thd_charset(current_thd), from,
marko's avatar
marko committed
864
		   &my_charset_filename, to, (uint) len, &errors);
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
}

/**********************************************************************
Converts an identifier to UTF-8.

NOTE that the exact prototype of this function has to be in
/innobase/dict/dict0dict.c! */
extern "C"
void
innobase_convert_from_id(
/*=====================*/
	char*		to,	/* out: converted identifier */
	const char*	from,	/* in: identifier to convert */
	ulint		len)	/* in: length of 'to', in bytes */
{
	uint	errors;

882
	strconvert(thd_charset(current_thd), from,
marko's avatar
marko committed
883
		   system_charset_info, to, (uint) len, &errors);
884 885
}

osku's avatar
osku committed
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915
/**********************************************************************
Compares NUL-terminated UTF-8 strings case insensitively.

NOTE that the exact prototype of this function has to be in
/innobase/dict/dict0dict.c! */
extern "C"
int
innobase_strcasecmp(
/*================*/
				/* out: 0 if a=b, <0 if a<b, >1 if a>b */
	const char*	a,	/* in: first string to compare */
	const char*	b)	/* in: second string to compare */
{
	return(my_strcasecmp(system_charset_info, a, b));
}

/**********************************************************************
Makes all characters in a NUL-terminated UTF-8 string lower case.

NOTE that the exact prototype of this function has to be in
/innobase/dict/dict0dict.c! */
extern "C"
void
innobase_casedn_str(
/*================*/
	char*	a)	/* in/out: string to put in lower case */
{
	my_casedn_str(system_charset_info, a);
}

916 917 918 919 920 921 922 923 924 925 926 927
/**************************************************************************
Determines the connection character set.

NOTE that the exact prototype of this function has to be in
/innobase/dict/dict0dict.c! */
extern "C"
struct charset_info_st*
innobase_get_charset(
/*=================*/
				/* out: connection character set */
	void*	mysql_thd)	/* in: MySQL thread handle */
{
928
	return(thd_charset((THD*) mysql_thd));
929 930
}

vasil's avatar
vasil committed
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
#if defined (__WIN__) && defined (MYSQL_DYNAMIC_PLUGIN)
extern MYSQL_PLUGIN_IMPORT MY_TMPDIR mysql_tmpdir_list;
/*******************************************************************//**
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(
	unsigned long);	/*!< in: OS error value */

/*********************************************************************//**
Creates a temporary file.
@return	temporary file descriptor, or < 0 on error */
extern "C"
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
osku's avatar
osku committed
1025 1026 1027 1028 1029 1030 1031 1032
/*************************************************************************
Creates a temporary file. */
extern "C"
int
innobase_mysql_tmpfile(void)
/*========================*/
			/* out: temporary file descriptor, or < 0 on error */
{
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
	int	fd2 = -1;
	File	fd = mysql_tmpfile("ib");
	if (fd >= 0) {
		/* Copy the file descriptor, so that the additional resources
		allocated by create_temp_file() can be freed by invoking
		my_close().

		Because the file descriptor returned by this function
		will be passed to fdopen(), it will be closed by invoking
		fclose(), which in turn will invoke close() instead of
		my_close(). */
		fd2 = dup(fd);
		if (fd2 < 0) {
			DBUG_PRINT("error",("Got error %d on dup",fd2));
			my_errno=errno;
			my_error(EE_OUT_OF_FILERESOURCES,
				 MYF(ME_BELL+ME_WAITTANG),
				 "ib*", my_errno);
		}
		my_close(fd, MYF(MY_WME));
	}
	return(fd2);
osku's avatar
osku committed
1055
}
vasil's avatar
vasil committed
1056
#endif
osku's avatar
osku committed
1057

1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
/*************************************************************************
Wrapper around MySQL's copy_and_convert function, see it for
documentation. */
extern "C"
ulint
innobase_convert_string(
/*====================*/
	void*		to,
	ulint		to_length,
	CHARSET_INFO*	to_cs,
	const void*	from,
	ulint		from_length,
	CHARSET_INFO*	from_cs,
	uint*		errors)
{
marko's avatar
marko committed
1073 1074 1075
  return(copy_and_convert((char*)to, (uint32) to_length, to_cs,
                          (const char*)from, (uint32) from_length, from_cs,
                          errors));
1076 1077
}

1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
/*************************************************************************
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
to reserve 3 values for the multi-value INSERT above. */
static
ulonglong
innobase_next_autoinc(
/*==================*/
					/* out: the next value */
	ulonglong	current,	/* in: Current value */
	ulonglong	increment,	/* in: increment current by */
1102 1103
	ulonglong	offset,		/* in: AUTOINC offset */
	ulonglong	max_value)	/* in: max value for type */
1104 1105 1106 1107 1108 1109
{
	ulonglong	next_value;

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

1110 1111 1112 1113 1114 1115
	/* According to MySQL documentation, if the offset is greater than
	the increment then the offset is ignored. */
	if (offset > increment) {
		offset = 0;
	}

1116 1117 1118
	if (max_value <= current) {
		next_value = max_value;
	} else if (offset <= 1) {
1119 1120
		/* Offset 0 and 1 are the same, because there must be at
		least one node in the system. */
1121 1122
		if (max_value - current <= increment) {
			next_value = max_value;
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136
		} else {
			next_value = current + increment;
		}
	} else {
		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. */
1137
		if (increment > (max_value / next_value)) {
1138

1139
			next_value = max_value;
1140 1141 1142
		} else {
			next_value *= increment;

1143 1144
			ut_a(max_value >= next_value);

1145
			/* Check for overflow. */
1146 1147
			if (max_value - next_value <= offset) {
				next_value = max_value;
1148 1149 1150 1151 1152 1153
			} else {
				next_value += offset;
			}
		}
	}

1154 1155
	ut_a(next_value <= max_value);

1156 1157 1158
	return(next_value);
}

1159 1160 1161 1162 1163 1164 1165 1166 1167
/** Copy the current SQL statement.
* @param[in] thd	MySQL client connection
* @param[in/out] trx	InnoDB transaction */
#define INNOBASE_COPY_STMT(thd, trx) do {		\
	LEX_STRING* stmt = thd_query_string(thd);	\
	(trx)->mysql_query_str = &stmt->str;		\
	(trx)->mysql_query_len = &stmt->length;		\
} while (0)

osku's avatar
osku committed
1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178
/*************************************************************************
Gets the InnoDB transaction handle for a MySQL handler object, creates
an InnoDB transaction struct if the corresponding MySQL thread struct still
lacks one. */
static
trx_t*
check_trx_exists(
/*=============*/
			/* out: InnoDB transaction handle */
	THD*	thd)	/* in: user thread handle */
{
1179
	trx_t*	trx = thd_to_trx(thd);
osku's avatar
osku committed
1180 1181 1182 1183

	ut_ad(thd == current_thd);

	if (trx == NULL) {
1184
		DBUG_ASSERT(thd != NULL);
osku's avatar
osku committed
1185 1186 1187
		trx = trx_allocate_for_mysql();

		trx->mysql_thd = thd;
1188
		INNOBASE_COPY_STMT(thd, trx);
osku's avatar
osku committed
1189 1190 1191

		/* Update the info whether we should skip XA steps that eat
		CPU time */
1192
		trx->support_xa = THDVAR(thd, support_xa);
1193 1194 1195

		/* We have a new trx, register with the thread handle */
		thd_set_ha_data(thd, innodb_hton_ptr, trx);
osku's avatar
osku committed
1196 1197
	} else {
		if (trx->magic_n != TRX_MAGIC_N) {
1198
			mem_analyze_corruption(trx);
osku's avatar
osku committed
1199

1200
			ut_error;
osku's avatar
osku committed
1201 1202 1203
		}
	}

1204
	if (thd_test_options(thd, OPTION_NO_FOREIGN_KEY_CHECKS)) {
osku's avatar
osku committed
1205 1206 1207 1208 1209
		trx->check_foreigns = FALSE;
	} else {
		trx->check_foreigns = TRUE;
	}

1210
	if (thd_test_options(thd, OPTION_RELAXED_UNIQUE_CHECKS)) {
osku's avatar
osku committed
1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
		trx->check_unique_secondary = FALSE;
	} else {
		trx->check_unique_secondary = TRUE;
	}

	return(trx);
}


/*************************************************************************
Construct ha_innobase handler. */

1223 1224
ha_innobase::ha_innobase(handlerton *hton, TABLE_SHARE *table_arg)
  :handler(hton, table_arg),
osku's avatar
osku committed
1225
  int_table_flags(HA_REC_NOT_IN_SEQ |
1226 1227 1228
		  HA_NULL_IN_KEY |
		  HA_CAN_INDEX_BLOBS |
		  HA_CAN_SQL_HANDLER |
marko's avatar
marko committed
1229
		  HA_PRIMARY_KEY_REQUIRED_FOR_POSITION |
1230
		  HA_PRIMARY_KEY_IN_READ_INDEX |
1231
		  HA_BINLOG_ROW_CAPABLE |
marko's avatar
marko committed
1232
		  HA_CAN_GEOMETRY | HA_PARTIAL_COLUMN_READ |
1233
		  HA_TABLE_SCAN_ON_INDEX),
osku's avatar
osku committed
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
  start_of_scan(0),
  num_write_row(0)
{}

/*************************************************************************
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. */
inline
int
ha_innobase::update_thd(
/*====================*/
			/* out: 0 or error code */
	THD*	thd)	/* in: thd to use the handle */
{
	trx_t*		trx;

1251
	trx = check_trx_exists(thd);
osku's avatar
osku committed
1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271

	if (prebuilt->trx != trx) {

		row_update_prebuilt_trx(prebuilt, trx);
	}

	user_thd = thd;

	return(0);
}

/*************************************************************************
Registers that InnoDB takes part in an SQL statement, so that MySQL knows to
roll back the statement if the statement results in an error. This MUST be
called for every SQL statement that may be rolled back by MySQL. Calling this
several times to register the same statement is allowed, too. */
inline
void
innobase_register_stmt(
/*===================*/
1272
        handlerton*	hton,	/* in: Innobase hton */
osku's avatar
osku committed
1273 1274
	THD*	thd)	/* in: MySQL thd (connection) object */
{
1275
	/* Register the statement */
1276
	trans_register_ha(thd, FALSE, hton);
osku's avatar
osku committed
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
}

/*************************************************************************
Registers an InnoDB transaction in MySQL, so that the MySQL XA code knows
to call the InnoDB prepare and commit, or rollback for the transaction. This
MUST be called for every transaction for which the user may call commit or
rollback. Calling this several times to register the same transaction is
allowed, too.
This function also registers the current SQL statement. */
inline
void
innobase_register_trx_and_stmt(
/*===========================*/
1290
        handlerton *hton, /* in: Innobase handlerton */
osku's avatar
osku committed
1291 1292 1293 1294 1295
	THD*	thd)	/* in: MySQL thd (connection) object */
{
	/* NOTE that actually innobase_register_stmt() registers also
	the transaction in the AUTOCOMMIT=1 mode. */

1296
	innobase_register_stmt(hton, thd);
osku's avatar
osku committed
1297

1298
	if (thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
1299

1300
		/* No autocommit mode, register for a transaction */
1301
		trans_register_ha(thd, TRUE, hton);
1302
	}
osku's avatar
osku committed
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365
}

/*   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.
*/

/**********************************************************************
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
the InnoDB kernel mutex. */
marko's avatar
marko committed
1366
static
osku's avatar
osku committed
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381
my_bool
innobase_query_caching_of_table_permitted(
/*======================================*/
				/* out: TRUE if permitted, FALSE if not;
				note that the value FALSE does not mean
				we should invalidate the query cache:
				invalidation is called explicitly */
	THD*	thd,		/* in: thd of the user who is trying to
				store a result to the query cache or
				retrieve it */
	char*	full_name,	/* in: concatenation of database name,
				the null character '\0', and the table
				name */
	uint	full_name_len,	/* in: length of the full name, i.e.
				len(dbname) + len(tablename) + 1 */
1382
	ulonglong *unused)	/* unused for this engine */
osku's avatar
osku committed
1383 1384 1385 1386 1387 1388 1389
{
	ibool	is_autocommit;
	trx_t*	trx;
	char	norm_name[1000];

	ut_a(full_name_len < 999);

1390
	trx = check_trx_exists(thd);
1391 1392

	if (trx->isolation_level == TRX_ISO_SERIALIZABLE) {
osku's avatar
osku committed
1393 1394
		/* In the SERIALIZABLE mode we add LOCK IN SHARE MODE to every
		plain SELECT if AUTOCOMMIT is not on. */
1395

osku's avatar
osku committed
1396 1397 1398 1399 1400 1401 1402
		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.");
jan's avatar
jan committed
1403

jan's avatar
jan committed
1404
		mutex_enter_noninline(&kernel_mutex);
jan's avatar
jan committed
1405
		trx_print(stderr, trx, 1024);
jan's avatar
jan committed
1406
		mutex_exit_noninline(&kernel_mutex);
osku's avatar
osku committed
1407 1408 1409 1410
	}

	innobase_release_stat_resources(trx);

1411
	if (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439

		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);
	}
1440

osku's avatar
osku committed
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
	/* Normalize the table name to InnoDB format */

	memcpy(norm_name, full_name, full_name_len);

	norm_name[strlen(norm_name)] = '/'; /* InnoDB uses '/' as the
					    separator between db and table */
	norm_name[full_name_len] = '\0';
#ifdef __WIN__
	innobase_casedn_str(norm_name);
#endif
	/* The call of row_search_.. will start a new transaction if it is
	not yet started */

1454
	if (trx->active_trans == 0) {
osku's avatar
osku committed
1455

1456
		innobase_register_trx_and_stmt(innodb_hton_ptr, thd);
1457 1458
		trx->active_trans = 1;
	}
osku's avatar
osku committed
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493

	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);
}

/*********************************************************************
Invalidates the MySQL query cache for the table.
NOTE that the exact prototype of this function has to be in
/innobase/row/row0ins.c! */
extern "C"
void
innobase_invalidate_query_cache(
/*============================*/
	trx_t*	trx,		/* in: transaction which modifies the table */
	char*	full_name,	/* in: concatenation of database name, null
				char '\0', table name, null char'\0';
				NOTE that in Windows this is always
				in LOWER CASE! */
	ulint	full_name_len)	/* in: full name length where also the null
				chars count */
{
	/* 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
1494 1495 1496 1497
	mysql_query_cache_invalidate4((THD*) trx->mysql_thd,
				      (const char*) full_name,
				      (uint32) full_name_len,
				      TRUE);
osku's avatar
osku committed
1498 1499 1500
#endif
}

1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515
/*****************************************************************//**
Convert an SQL identifier to the MySQL system_charset_info (UTF-8)
and quote it if needed.
@return	pointer to the end of buf */
static
char*
innobase_convert_identifier(
/*========================*/
	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;
				FALSE=id is an UTF-8 string */
osku's avatar
osku committed
1516
{
1517 1518 1519 1520 1521 1522 1523 1524
	char nz[NAME_LEN + 1];
#if MYSQL_VERSION_ID >= 50141
	char nz2[NAME_LEN + 1 + EXPLAIN_FILENAME_MAX_EXTRA_LENGTH];
#else /* MYSQL_VERSION_ID >= 50141 */
	char nz2[NAME_LEN + 1 + sizeof srv_mysql50_table_name_prefix];
#endif /* MYSQL_VERSION_ID >= 50141 */

	const char*	s	= id;
1525 1526
	int		q;

1527 1528 1529 1530 1531 1532 1533
	if (file_id) {
		/* Decode the table name.  The MySQL function expects
		a NUL-terminated string.  The input and output strings
		buffers must not be shared. */

		if (UNIV_UNLIKELY(idlen > (sizeof nz) - 1)) {
			idlen = (sizeof nz) - 1;
1534 1535
		}

1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547
		memcpy(nz, id, idlen);
		nz[idlen] = 0;

		s = nz2;
#if MYSQL_VERSION_ID >= 50141
		idlen = explain_filename((THD*) thd, nz, nz2, sizeof nz2,
					 EXPLAIN_PARTITIONS_AS_COMMENT);
		goto no_quote;
#else /* MYSQL_VERSION_ID >= 50141 */
		idlen = filename_to_tablename(nz, nz2, sizeof nz2);
#endif /* MYSQL_VERSION_ID >= 50141 */
	}
1548

1549 1550
	/* See if the identifier needs to be quoted. */
	if (UNIV_UNLIKELY(!thd)) {
1551 1552
		q = '"';
	} else {
1553
		q = get_quote_char_for_identifier((THD*) thd, s, (int) idlen);
1554 1555 1556
	}

	if (q == EOF) {
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
#if MYSQL_VERSION_ID >= 50141
no_quote:
#endif /* MYSQL_VERSION_ID >= 50141 */
		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;
			}

			*buf++ = c;
			*buf++ = c;
			buflen -= 2;
		} else {
			if (UNIV_UNLIKELY(buflen < 2)) {
				break;
1588
			}
1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622

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

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

/*****************************************************************//**
Convert a table or index name to the MySQL system_charset_info (UTF-8)
and quote it if needed.
@return	pointer to the end of buf */
extern "C"
char*
innobase_convert_name(
/*==================*/
	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;
				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;
1623
		}
1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638

		/* 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 {
no_db_name:
		s = innobase_convert_identifier(buf, buflen, id, idlen,
						thd, table_id);
osku's avatar
osku committed
1639
	}
1640

1641 1642
	return(s);

osku's avatar
osku committed
1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653
}

/**************************************************************************
Determines if the currently running transaction has been interrupted. */
extern "C"
ibool
trx_is_interrupted(
/*===============*/
			/* out: TRUE if interrupted */
	trx_t*	trx)	/* in: transaction */
{
1654
	return(trx && trx->mysql_thd && thd_killed((THD*) trx->mysql_thd));
osku's avatar
osku committed
1655 1656
}

1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669
/******************************************************************
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(
/*===========*/
	row_prebuilt_t*	prebuilt)	/* in/out: prebuilt struct */
{
	prebuilt->keep_other_fields_on_keyread = 0;
	prebuilt->read_just_key = 0;
}

osku's avatar
osku committed
1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680
/*********************************************************************
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. */

void
ha_innobase::init_table_handle_for_HANDLER(void)
/*============================================*/
{
1681 1682 1683 1684
	/* 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
1685

1686
	update_thd(ha_thd());
osku's avatar
osku committed
1687

1688 1689
	/* Initialize the prebuilt struct much like it would be inited in
	external_lock */
osku's avatar
osku committed
1690 1691 1692

	innobase_release_stat_resources(prebuilt->trx);

1693
	/* If the transaction is not started yet, start it */
osku's avatar
osku committed
1694

1695
	trx_start_if_not_started_noninline(prebuilt->trx);
osku's avatar
osku committed
1696

1697
	/* Assign a read view if the transaction does not have it yet */
osku's avatar
osku committed
1698

1699
	trx_assign_read_view(prebuilt->trx);
osku's avatar
osku committed
1700 1701 1702

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

1703
	if (prebuilt->trx->active_trans == 0) {
osku's avatar
osku committed
1704

1705
		innobase_register_trx_and_stmt(ht, user_thd);
osku's avatar
osku committed
1706

1707 1708
		prebuilt->trx->active_trans = 1;
	}
osku's avatar
osku committed
1709

1710 1711
	/* We did the necessary inits in this function, no need to repeat them
	in row_search_for_mysql */
osku's avatar
osku committed
1712

1713
	prebuilt->sql_stat_start = FALSE;
osku's avatar
osku committed
1714

1715 1716
	/* 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
1717

1718 1719
	prebuilt->select_lock_type = LOCK_NONE;
	prebuilt->stored_select_lock_type = LOCK_NONE;
osku's avatar
osku committed
1720

1721
	/* Always fetch all columns in the index record */
osku's avatar
osku committed
1722

1723
	prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
osku's avatar
osku committed
1724

1725
	/* We want always to fetch all columns in the whole row? Or do
osku's avatar
osku committed
1726 1727 1728
	we???? */

	prebuilt->used_in_HANDLER = TRUE;
1729
	reset_template(prebuilt);
osku's avatar
osku committed
1730 1731 1732 1733
}

/*************************************************************************
Opens an InnoDB database. */
1734
static
marko's avatar
marko committed
1735
int
1736 1737 1738 1739
innobase_init(
/*==========*/
			/* out: 0 on success, error code on failure */
	void	*p)	/* in: InnoDB handlerton */
osku's avatar
osku committed
1740 1741 1742 1743
{
	static char	current_dir[3];		/* Set if using current lib */
	int		err;
	bool		ret;
1744
	char		*default_path;
osku's avatar
osku committed
1745

1746
	DBUG_ENTER("innobase_init");
1747
        handlerton *innobase_hton= (handlerton *)p;
1748
        innodb_hton_ptr = innobase_hton;
marko's avatar
marko committed
1749

1750
        innobase_hton->state = SHOW_OPTION_YES;
marko's avatar
marko committed
1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773
        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;
marko's avatar
marko committed
1774

osku's avatar
osku committed
1775 1776
	ut_a(DATA_MYSQL_TRUE_VARCHAR == (ulint)MYSQL_TYPE_VARCHAR);

1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794
#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 */

1795 1796 1797 1798 1799 1800 1801
	/* Check that values don't overflow on 32-bit systems. */
	if (sizeof(ulint) == 4) {
		if (innobase_buffer_pool_size > UINT_MAX32) {
			sql_print_error(
				"innobase_buffer_pool_size can't be over 4GB"
				" on 32-bit systems");

osku's avatar
osku committed
1802
			goto error;
1803 1804 1805 1806 1807 1808 1809
		}

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

osku's avatar
osku committed
1810
			goto error;
1811 1812 1813
		}
	}

1814
	os_innodb_umask = (ulint)my_umask;
osku's avatar
osku committed
1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825

	/* 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 {
1826 1827 1828 1829 1830
		/* 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
1831 1832 1833 1834 1835
	}

	ut_a(default_path);

	if (specialflag & SPECIAL_NO_PRIOR) {
1836
		srv_set_thread_priorities = FALSE;
osku's avatar
osku committed
1837
	} else {
1838 1839
		srv_set_thread_priorities = TRUE;
		srv_query_thread_priority = QUERY_PRIOR;
osku's avatar
osku committed
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852
	}

	/* 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
1853
	auto-extending. Thus users can use InnoDB in >= 4.0 without having
osku's avatar
osku committed
1854 1855 1856
	to specify any startup options. */

	if (!innobase_data_file_path) {
1857
		innobase_data_file_path = (char*) "ibdata1:10M:autoextend";
osku's avatar
osku committed
1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874
	}

	/* 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(
				internal_innobase_data_file_path,
				&srv_data_file_names,
				&srv_data_file_sizes,
				&srv_data_file_is_raw_partition,
				&srv_n_data_files,
				&srv_auto_extend_last_data_file,
				&srv_last_file_size_max);
	if (ret == FALSE) {
1875
		sql_print_error(
osku's avatar
osku committed
1876
			"InnoDB: syntax error in innodb_data_file_path");
1877
		my_free(internal_innobase_data_file_path,
osku's avatar
osku committed
1878
						MYF(MY_ALLOW_ZERO_PTR));
1879
		goto error;
osku's avatar
osku committed
1880 1881 1882 1883 1884
	}

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

	/* The default dir for log files is the datadir of MySQL */
1885

osku's avatar
osku committed
1886
	if (!innobase_log_group_home_dir) {
1887
		innobase_log_group_home_dir = default_path;
osku's avatar
osku committed
1888 1889
	}

1890
#ifdef UNIV_LOG_ARCHIVE
osku's avatar
osku committed
1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907
	/* 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)
		srv_parse_log_group_home_dirs(innobase_log_group_home_dir,
						&srv_log_group_home_dirs);

	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");

1908
		my_free(internal_innobase_data_file_path,
osku's avatar
osku committed
1909
						MYF(MY_ALLOW_ZERO_PTR));
1910
		goto error;
osku's avatar
osku committed
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
	}

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

	srv_file_flush_method_str = innobase_unix_file_flush_method;

	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;

1926 1927 1928 1929
	/* We set srv_pool_size here in units of 1 kB. InnoDB internally
	changes the value so that it becomes the number of database pages. */

	if (innobase_buffer_pool_awe_mem_mb == 0) {
1930
		srv_pool_size = (ulint)(innobase_buffer_pool_size / 1024);
1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941
	} else {
		srv_use_awe = TRUE;
		srv_pool_size = (ulint)
				(1024 * innobase_buffer_pool_awe_mem_mb);
		srv_awe_window_size = (ulint) innobase_buffer_pool_size;

		/* Note that what the user specified as
		innodb_buffer_pool_size is actually the AWE memory window
		size in this case, and the real buffer pool size is
		determined by .._awe_mem_mb. */
	}
osku's avatar
osku committed
1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952

	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;

	srv_n_file_io_threads = (ulint) innobase_file_io_threads;

	srv_lock_wait_timeout = (ulint) innobase_lock_wait_timeout;
	srv_force_recovery = (ulint) innobase_force_recovery;

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

1953 1954 1955 1956
#ifdef HAVE_LARGE_PAGES
        if ((os_use_large_pages = (ibool) my_use_large_pages))
		os_large_page_size = (ulint) opt_large_page_size;
#endif
1957

osku's avatar
osku committed
1958 1959
	row_rollback_on_timeout = (ibool) innobase_rollback_on_timeout;

osku's avatar
osku committed
1960
	srv_file_per_table = (ibool) innobase_file_per_table;
1961
	srv_locks_unsafe_for_binlog = (ibool) innobase_locks_unsafe_for_binlog;
osku's avatar
osku committed
1962 1963 1964 1965

	srv_max_n_open_files = (ulint) innobase_open_files;
	srv_innodb_status = (ibool) innobase_create_status_file;

1966
	srv_use_adaptive_hash_indexes =
vasil's avatar
vasil committed
1967
		(ibool) innobase_adaptive_hash_index;
1968

osku's avatar
osku committed
1969 1970 1971 1972 1973 1974 1975 1976 1977
	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);
1978
	ut_a(DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number);
osku's avatar
osku committed
1979 1980 1981 1982 1983 1984 1985 1986 1987 1988

	/* 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. */

	ut_a(0 == strcmp((char*)my_charset_latin1.name,
						(char*)"latin1_swedish_ci"));
	memcpy(srv_latin1_ordering, my_charset_latin1.sort_order, 256);

1989 1990
	innobase_commit_concurrency_init_default();

osku's avatar
osku committed
1991
	/* Since we in this module access directly the fields of a trx
1992
	struct, and due to different headers and flags it might happen that
osku's avatar
osku committed
1993 1994 1995 1996 1997 1998 1999 2000 2001
	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. */

	srv_sizeof_trx_t_in_ha_innodb_cc = sizeof(trx_t);

	err = innobase_start_or_create_for_mysql();

	if (err != DB_SUCCESS) {
2002
		my_free(internal_innobase_data_file_path,
osku's avatar
osku committed
2003
						MYF(MY_ALLOW_ZERO_PTR));
2004
		goto error;
osku's avatar
osku committed
2005 2006 2007
	}

	(void) hash_init(&innobase_open_tables,system_charset_info, 32, 0, 0,
2008 2009 2010 2011 2012
					(hash_get_key) innobase_get_key, 0, 0);
	pthread_mutex_init(&innobase_share_mutex, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&prepare_commit_mutex, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&commit_threads_m, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&commit_cond_m, MY_MUTEX_INIT_FAST);
vasil's avatar
vasil committed
2013
	pthread_mutex_init(&analyze_mutex, MY_MUTEX_INIT_FAST);
2014
	pthread_cond_init(&commit_cond, NULL);
osku's avatar
osku committed
2015 2016 2017 2018
	innodb_inited= 1;

	DBUG_RETURN(FALSE);
error:
2019
	DBUG_RETURN(TRUE);
osku's avatar
osku committed
2020 2021 2022 2023
}

/***********************************************************************
Closes an InnoDB database. */
2024
static
osku's avatar
osku committed
2025
int
2026
innobase_end(handlerton *hton, ha_panic_function type)
osku's avatar
osku committed
2027 2028 2029 2030 2031 2032 2033
/*==============*/
				/* out: TRUE if error */
{
	int	err= 0;

	DBUG_ENTER("innobase_end");

2034
#ifdef __NETWARE__	/* some special cleanup for NetWare */
osku's avatar
osku committed
2035 2036 2037 2038 2039 2040
	if (nw_panic) {
		set_panic_flag_for_netware();
	}
#endif
	if (innodb_inited) {

2041 2042 2043 2044
		srv_fast_shutdown = (ulint) innobase_fast_shutdown;
		innodb_inited = 0;
		if (innobase_shutdown_for_mysql() != DB_SUCCESS) {
			err = 1;
osku's avatar
osku committed
2045
		}
2046 2047
		hash_free(&innobase_open_tables);
		my_free(internal_innobase_data_file_path,
osku's avatar
osku committed
2048
						MYF(MY_ALLOW_ZERO_PTR));
2049 2050 2051 2052
		pthread_mutex_destroy(&innobase_share_mutex);
		pthread_mutex_destroy(&prepare_commit_mutex);
		pthread_mutex_destroy(&commit_threads_m);
		pthread_mutex_destroy(&commit_cond_m);
vasil's avatar
vasil committed
2053
		pthread_mutex_destroy(&analyze_mutex);
2054
		pthread_cond_destroy(&commit_cond);
osku's avatar
osku committed
2055 2056
	}

2057
	DBUG_RETURN(err);
osku's avatar
osku committed
2058 2059 2060 2061 2062
}

/********************************************************************
Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
the logs, and the name of this function should be innobase_checkpoint. */
2063
static
osku's avatar
osku committed
2064
bool
2065
innobase_flush_logs(handlerton *hton)
osku's avatar
osku committed
2066 2067 2068
/*=====================*/
				/* out: TRUE if error */
{
2069
	bool	result = 0;
osku's avatar
osku committed
2070

2071
	DBUG_ENTER("innobase_flush_logs");
osku's avatar
osku committed
2072 2073 2074

	log_buffer_flush_to_disk();

2075
	DBUG_RETURN(result);
osku's avatar
osku committed
2076 2077 2078 2079
}

/*********************************************************************
Commits a transaction in an InnoDB database. */
2080
static
osku's avatar
osku committed
2081 2082 2083 2084 2085
void
innobase_commit_low(
/*================*/
	trx_t*	trx)	/* in: transaction handle */
{
2086
	if (trx->conc_state == TRX_NOT_STARTED) {
osku's avatar
osku committed
2087

2088 2089
		return;
	}
osku's avatar
osku committed
2090 2091 2092 2093 2094 2095 2096 2097 2098

	trx_commit_for_mysql(trx);
}

/*********************************************************************
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
have one. */
2099
static
osku's avatar
osku committed
2100 2101 2102 2103
int
innobase_start_trx_and_assign_read_view(
/*====================================*/
			/* out: 0 */
2104
        handlerton *hton, /* in: Innodb handlerton */ 
osku's avatar
osku committed
2105 2106 2107 2108 2109
	THD*	thd)	/* in: MySQL thread handle of the user for whom
			the transaction should be committed */
{
	trx_t*	trx;

2110
	DBUG_ENTER("innobase_start_trx_and_assign_read_view");
osku's avatar
osku committed
2111 2112 2113

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

2114
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131

	/* 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 */

	trx_start_if_not_started_noninline(trx);

	/* 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 */

2132
	if (trx->active_trans == 0) {
2133
		innobase_register_trx_and_stmt(hton, current_thd);
2134 2135
		trx->active_trans = 1;
	}
osku's avatar
osku committed
2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147

	DBUG_RETURN(0);
}

/*********************************************************************
Commits a transaction in an InnoDB database or marks an SQL statement
ended. */
static
int
innobase_commit(
/*============*/
			/* out: 0 */
2148 2149
        handlerton *hton, /* in: Innodb handlerton */ 
	THD* 	thd,	/* in: MySQL thread handle of the user for whom
osku's avatar
osku committed
2150
			the transaction should be committed */
2151 2152
	bool	all)	/* in:	TRUE - commit transaction
				FALSE - the current SQL statement ended */
osku's avatar
osku committed
2153 2154 2155
{
	trx_t*		trx;

2156 2157
	DBUG_ENTER("innobase_commit");
	DBUG_PRINT("trans", ("ending transaction"));
osku's avatar
osku committed
2158

2159
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2160 2161

	/* Update the info whether we should skip XA steps that eat CPU time */
2162
	trx->support_xa = THDVAR(thd, support_xa);
osku's avatar
osku committed
2163

2164 2165
	/* 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
2166

2167
	if (trx->has_search_latch) {
2168
		trx_search_latch_release_if_reserved(trx);
2169 2170 2171
	}

	/* The flag trx->active_trans is set to 1 in
osku's avatar
osku committed
2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185

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

	and it is only set to 0 in a commit or a rollback. If it is 0 we know
	there cannot be resources to be freed and we could return immediately.
	For the time being, we play safe and do the cleanup though there should
	be nothing to clean up. */

2186 2187 2188 2189 2190
	if (trx->active_trans == 0
		&& trx->conc_state != TRX_NOT_STARTED) {

		sql_print_error("trx->active_trans == 0, but"
			" trx->conc_state != TRX_NOT_STARTED");
osku's avatar
osku committed
2191
	}
2192
	if (all
2193
		|| (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
2194 2195

		/* We were instructed to commit the whole transaction, or
osku's avatar
osku committed
2196 2197
		this is an SQL statement end and autocommit is on */

2198 2199 2200
		/* We need current binlog position for ibbackup to work.
		Note, the position is current because of
		prepare_commit_mutex */
osku's avatar
osku committed
2201
retry:
2202
		if (innobase_commit_concurrency > 0) {
2203 2204 2205
			pthread_mutex_lock(&commit_cond_m);
			commit_threads++;

2206
			if (commit_threads > innobase_commit_concurrency) {
2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217
				commit_threads--;
				pthread_cond_wait(&commit_cond,
					&commit_cond_m);
				pthread_mutex_unlock(&commit_cond_m);
				goto retry;
			}
			else {
				pthread_mutex_unlock(&commit_cond_m);
			}
		}

2218 2219
		trx->mysql_log_file_name = mysql_bin_log_file_name();
		trx->mysql_log_offset = (ib_longlong) mysql_bin_log_file_pos();
osku's avatar
osku committed
2220 2221 2222

		innobase_commit_low(trx);

2223
		if (innobase_commit_concurrency > 0) {
2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236
			pthread_mutex_lock(&commit_cond_m);
			commit_threads--;
			pthread_cond_signal(&commit_cond);
			pthread_mutex_unlock(&commit_cond_m);
		}

		if (trx->active_trans == 2) {

			pthread_mutex_unlock(&prepare_commit_mutex);
		}

		trx->active_trans = 0;

osku's avatar
osku committed
2237
	} else {
2238
		/* We just mark the SQL statement ended and do not do a
osku's avatar
osku committed
2239 2240
		transaction commit */

marko's avatar
marko committed
2241 2242 2243 2244
		/* 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);
2245

osku's avatar
osku committed
2246 2247 2248 2249 2250 2251 2252
		/* 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);
	}

2253 2254
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

2255
	if (trx->declared_to_be_inside_innodb) {
2256
		/* Release our possible ticket in the FIFO */
osku's avatar
osku committed
2257

2258
		srv_conc_force_exit_innodb(trx);
2259
	}
2260 2261 2262

	/* Tell the InnoDB server that there might be work for utility
	threads: */
osku's avatar
osku committed
2263 2264 2265 2266 2267 2268 2269
	srv_active_wake_master_thread();

	DBUG_RETURN(0);
}

/*********************************************************************
Rolls back a transaction or the latest SQL statement. */
2270 2271
static
int
osku's avatar
osku committed
2272 2273 2274
innobase_rollback(
/*==============*/
			/* out: 0 or error number */
2275
        handlerton *hton, /* in: Innodb handlerton */ 
osku's avatar
osku committed
2276 2277
	THD*	thd,	/* in: handle to the MySQL thread of the user
			whose transaction should be rolled back */
2278 2279
	bool	all)	/* in:	TRUE - commit transaction
				FALSE - the current SQL statement ended */
osku's avatar
osku committed
2280 2281 2282 2283 2284 2285 2286
{
	int	error = 0;
	trx_t*	trx;

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

2287
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2288 2289

	/* Update the info whether we should skip XA steps that eat CPU time */
2290
	trx->support_xa = THDVAR(thd, support_xa);
osku's avatar
osku committed
2291 2292 2293 2294 2295 2296 2297

	/* 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);

2298 2299
	trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */

marko's avatar
marko committed
2300 2301 2302
	/* 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 */
2303

marko's avatar
marko committed
2304
	row_unlock_table_autoinc_for_mysql(trx);
osku's avatar
osku committed
2305

2306
	if (all
2307
		|| !thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
2308 2309

		error = trx_rollback_for_mysql(trx);
2310
		trx->active_trans = 0;
osku's avatar
osku committed
2311 2312 2313 2314 2315 2316 2317 2318 2319
	} else {
		error = trx_rollback_last_sql_stat_for_mysql(trx);
	}

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

/*********************************************************************
Rolls back a transaction */
2320
static
osku's avatar
osku committed
2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337
int
innobase_rollback_trx(
/*==================*/
			/* out: 0 or error number */
	trx_t*	trx)	/*  in: transaction */
{
	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);

marko's avatar
marko committed
2338 2339 2340
	/* 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 */
2341

marko's avatar
marko committed
2342
	row_unlock_table_autoinc_for_mysql(trx);
osku's avatar
osku committed
2343 2344 2345 2346 2347 2348 2349 2350

	error = trx_rollback_for_mysql(trx);

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

/*********************************************************************
Rolls back a transaction to a savepoint. */
2351 2352
static
int
osku's avatar
osku committed
2353 2354 2355 2356
innobase_rollback_to_savepoint(
/*===========================*/
				/* out: 0 if success, HA_ERR_NO_SAVEPOINT if
				no savepoint with the given name */
2357
        handlerton *hton,       /* in: Innodb handlerton */ 
osku's avatar
osku committed
2358 2359
	THD*	thd,		/* in: handle to the MySQL thread of the user
				whose transaction should be rolled back */
2360
	void*	savepoint)	/* in: savepoint data */
osku's avatar
osku committed
2361
{
2362 2363 2364 2365
	ib_longlong	mysql_binlog_cache_pos;
	int		error = 0;
	trx_t*		trx;
	char		name[64];
osku's avatar
osku committed
2366 2367 2368

	DBUG_ENTER("innobase_rollback_to_savepoint");

2369
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2370 2371 2372 2373 2374 2375 2376

	/* 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);

2377
	/* TODO: use provided savepoint data area to store savepoint data */
osku's avatar
osku committed
2378

2379
	longlong2str((ulint)savepoint, name, 36);
osku's avatar
osku committed
2380

2381
	error = (int) trx_rollback_to_savepoint_for_mysql(trx, name,
osku's avatar
osku committed
2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393
						&mysql_binlog_cache_pos);
	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

/*********************************************************************
Release transaction savepoint name. */
static
int
innobase_release_savepoint(
/*=======================*/
				/* out: 0 if success, HA_ERR_NO_SAVEPOINT if
				no savepoint with the given name */
2394
        handlerton*	hton,	/* in: handlerton for Innodb */
osku's avatar
osku committed
2395 2396
	THD*	thd,		/* in: handle to the MySQL thread of the user
				whose transaction should be rolled back */
2397
	void*	savepoint)	/* in: savepoint data */
osku's avatar
osku committed
2398
{
2399 2400 2401
	int		error = 0;
	trx_t*		trx;
	char		name[64];
osku's avatar
osku committed
2402 2403 2404

	DBUG_ENTER("innobase_release_savepoint");

2405
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2406

2407
	/* TODO: use provided savepoint data area to store savepoint data */
osku's avatar
osku committed
2408

2409
	longlong2str((ulint)savepoint, name, 36);
osku's avatar
osku committed
2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422

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

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

/*********************************************************************
Sets a transaction savepoint. */
static
int
innobase_savepoint(
/*===============*/
				/* out: always 0, that is, always succeeds */
2423
	handlerton*	hton,   /* in: handle to the Innodb handlerton */
osku's avatar
osku committed
2424
	THD*	thd,		/* in: handle to the MySQL thread */
2425
	void*	savepoint)	/* in: savepoint data */
osku's avatar
osku committed
2426 2427 2428 2429 2430 2431
{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_savepoint");

2432 2433 2434 2435 2436
	/*
	  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.
	*/
2437 2438
#ifdef MYSQL_SERVER /* plugins cannot access thd->in_sub_stmt */
	DBUG_ASSERT(thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) ||
2439
		thd->in_sub_stmt);
2440
#endif /* MYSQL_SERVER */
osku's avatar
osku committed
2441

2442
	trx = check_trx_exists(thd);
osku's avatar
osku committed
2443 2444 2445 2446 2447 2448 2449

	/* 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);

2450 2451
	/* cannot happen outside of transaction */
	DBUG_ASSERT(trx->active_trans);
osku's avatar
osku committed
2452

2453 2454 2455
	/* TODO: use provided savepoint data area to store savepoint data */
	char name[64];
	longlong2str((ulint)savepoint,name,36);
osku's avatar
osku committed
2456

2457
	error = (int) trx_savepoint_for_mysql(trx, name, (ib_longlong)0);
osku's avatar
osku committed
2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

/*********************************************************************
Frees a possible InnoDB trx object associated with the current THD. */
static
int
innobase_close_connection(
/*======================*/
			/* out: 0 or error number */
2469
        handlerton*	hton,	/* in:  innobase handlerton */
osku's avatar
osku committed
2470 2471 2472 2473 2474
	THD*	thd)	/* in: handle to the MySQL thread of the user
			whose resources should be free'd */
{
	trx_t*	trx;

2475 2476 2477
	DBUG_ENTER("innobase_close_connection");
	DBUG_ASSERT(hton == innodb_hton_ptr);
	trx = thd_to_trx(thd);
osku's avatar
osku committed
2478 2479 2480

	ut_a(trx);

2481 2482 2483 2484 2485
	if (trx->active_trans == 0
		&& trx->conc_state != TRX_NOT_STARTED) {

		sql_print_error("trx->active_trans == 0, but"
			" trx->conc_state != TRX_NOT_STARTED");
osku's avatar
osku committed
2486 2487 2488 2489
	}


	if (trx->conc_state != TRX_NOT_STARTED &&
2490 2491 2492 2493 2494 2495 2496
		global_system_variables.log_warnings) {
		sql_print_warning(
			"MySQL is closing a connection that has an active "
			"InnoDB transaction.  %lu row modifications will "
			"roll back.",
			(ulong) trx->undo_no.low);
	}
osku's avatar
osku committed
2497 2498 2499

	innobase_rollback_trx(trx);

2500 2501 2502
	/* Release the lock in thread handler */
	thd_set_ha_data(thd, hton, NULL);

2503
	thr_local_free(trx->mysql_thread_id);
2504
	trx_free_for_mysql(trx);
osku's avatar
osku committed
2505

2506
	DBUG_RETURN(0);
osku's avatar
osku committed
2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521
}


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

/********************************************************************
Get the record format from the data dictionary. */
enum row_type
ha_innobase::get_row_type() const
/*=============================*/
			/* out: ROW_TYPE_REDUNDANT or ROW_TYPE_COMPACT */
{
	if (prebuilt && prebuilt->table) {
2522
		if (dict_table_is_comp_noninline(prebuilt->table)) {
osku's avatar
osku committed
2523 2524 2525 2526 2527 2528 2529 2530 2531
			return(ROW_TYPE_COMPACT);
		} else {
			return(ROW_TYPE_REDUNDANT);
		}
	}
	ut_ad(0);
	return(ROW_TYPE_NOT_USED);
}

2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546


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

osku's avatar
osku committed
2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608
/********************************************************************
Gives the file extension of an InnoDB single-table tablespace. */
static const char* ha_innobase_exts[] = {
  ".ibd",
  NullS
};

const char**
ha_innobase::bas_ext() const
/*========================*/
				/* out: file extension string */
{
  return ha_innobase_exts;
}


/*********************************************************************
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(
/*=================*/
	char*		norm_name,	/* out: normalized name as a
					null-terminated string */
	const char*	name)		/* in: table name string */
{
	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
}

2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670
/************************************************************************
Get the upper limit of the MySQL integral and floating-point type. */
static
ulonglong
innobase_get_int_col_max_value(
/*===========================*/
				/* out: maximum allowed value for the field */
	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);
}

2671 2672 2673 2674
/************************************************************************
Set the autoinc column max value. This should only be called once from
ha_innobase::open(). Therefore there's no need for a covering lock. */

2675
void
2676 2677 2678 2679
ha_innobase::innobase_initialize_autoinc()
/*======================================*/
{
	ulonglong	auto_inc;
2680
	const Field*	field = table->found_next_number_field;
2681

2682 2683 2684 2685
	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
sunny's avatar
sunny committed
2686 2687 2688
		autoinc column. We set it to the 0, effectively disabling
		updates to the table. */
		auto_inc = 0;
2689

2690 2691 2692 2693 2694 2695 2696
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB: Unable to determine the AUTOINC "
				"column name\n");
	}

	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {
		/* If the recovery level is set so high that writes
sunny's avatar
sunny committed
2697
		are disabled we force the AUTOINC counter to 0
2698 2699 2700 2701 2702 2703 2704 2705
		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. */
sunny's avatar
sunny committed
2706
		auto_inc = 0;
2707
	} else if (field == NULL) {
sunny's avatar
sunny committed
2708 2709
		/* This is a far more serious error, best to avoid
		opening the table and return failure. */
2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724
		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());
		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) {
2725 2726 2727 2728 2729
		case DB_SUCCESS: {
			ulonglong	col_max_value;

			col_max_value = innobase_get_int_col_max_value(field);

2730
			/* At the this stage we do not know the increment
2731
			nor the offset, so use a default increment of 1. */
2732

2733 2734
			auto_inc = innobase_next_autoinc(
				read_auto_inc, 1, 1, col_max_value);
2735

2736 2737
			break;
		}
2738 2739 2740 2741 2742 2743 2744
		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 "
sunny's avatar
sunny committed
2745
				"value to 0,\n"
2746 2747 2748 2749 2750 2751 2752 2753
				"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);

sunny's avatar
sunny committed
2754 2755 2756 2757 2758 2759 2760
			/* 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;
2761 2762 2763 2764 2765 2766 2767
			break;
		default:
			/* row_search_max_autoinc() should only return
			one of DB_SUCCESS or DB_RECORD_NOT_FOUND. */
			ut_error;
		}
	}
2768

2769
	dict_table_autoinc_initialize(prebuilt->table, auto_inc);
2770 2771
}

osku's avatar
osku committed
2772 2773 2774 2775 2776 2777 2778 2779 2780
/*********************************************************************
Creates and opens a handle to a table which already exists in an InnoDB
database. */

int
ha_innobase::open(
/*==============*/
					/* out: 1 if error, 0 if success */
	const char*	name,		/* in: table name */
2781 2782
	int		mode,		/* in: not used */
	uint		test_if_locked)	/* in: not used */
osku's avatar
osku committed
2783 2784
{
	dict_table_t*	ib_table;
2785
	char		norm_name[1000];
osku's avatar
osku committed
2786
	THD*		thd;
inaam's avatar
inaam committed
2787 2788
	ulint		retries = 0;
	char*		is_part = NULL;
osku's avatar
osku committed
2789 2790 2791 2792 2793 2794

	DBUG_ENTER("ha_innobase::open");

	UT_NOT_USED(mode);
	UT_NOT_USED(test_if_locked);

2795
	thd = ha_thd();
2796 2797 2798 2799 2800 2801 2802 2803

	/* 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
2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820
	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;
2821
	if (!(uchar*) my_multi_malloc(MYF(MY_WME),
2822 2823 2824 2825
			&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
2826

2827 2828
		DBUG_RETURN(1);
	}
osku's avatar
osku committed
2829

inaam's avatar
inaam committed
2830 2831 2832 2833 2834 2835 2836
	/* 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
2837
	/* Get pointer to a table object in InnoDB dictionary cache */
2838
	ib_table = dict_table_get(norm_name, TRUE);
inaam's avatar
inaam committed
2839
	
2840
	if (NULL == ib_table) {
inaam's avatar
inaam committed
2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852
		if (is_part && retries < 10) {
			++retries;
			os_thread_sleep(100000);
			goto retry;
		}

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

2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864
		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"
2865
				"See http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html\n"
osku's avatar
osku committed
2866 2867
				"how you can resolve the problem.\n",
				norm_name);
2868
		free_share(share);
marko's avatar
marko committed
2869
		my_free(upd_buff, MYF(0));
2870
		my_errno = ENOENT;
osku's avatar
osku committed
2871

2872 2873
		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
osku's avatar
osku committed
2874

2875
	if (ib_table->ibd_file_missing && !thd_tablespace_op(thd)) {
osku's avatar
osku committed
2876 2877 2878 2879 2880
		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"
2881
				"See http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html\n"
osku's avatar
osku committed
2882 2883
				"how you can resolve the problem.\n",
				norm_name);
2884
		free_share(share);
marko's avatar
marko committed
2885
		my_free(upd_buff, MYF(0));
2886
		my_errno = ENOENT;
osku's avatar
osku committed
2887 2888

		dict_table_decrement_handle_count(ib_table);
2889 2890
		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
osku's avatar
osku committed
2891

osku's avatar
osku committed
2892
	prebuilt = row_create_prebuilt(ib_table);
osku's avatar
osku committed
2893

osku's avatar
osku committed
2894
	prebuilt->mysql_row_len = table->s->reclength;
2895 2896
	prebuilt->default_rec = table->s->default_values;
	ut_ad(prebuilt->default_rec);
osku's avatar
osku committed
2897 2898 2899

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

2900
	primary_key = table->s->primary_key;
osku's avatar
osku committed
2901 2902 2903 2904
	key_used_on_scan = primary_key;

	/* Allocate a buffer for a 'row reference'. A row reference is
	a string of bytes of length ref_length which uniquely specifies
2905 2906 2907
	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
2908

2909 2910
	if (!row_table_got_default_clust_index(ib_table)) {
		if (primary_key >= MAX_KEY) {
osku's avatar
osku committed
2911 2912 2913 2914
		  sql_print_error("Table %s has a primary key in InnoDB data "
				  "dictionary, but not in MySQL!", name);
		}

osku's avatar
osku committed
2915 2916
		prebuilt->clust_index_was_generated = FALSE;

2917
		/* MySQL allocates the buffer for ref. key_info->key_length
osku's avatar
osku committed
2918 2919 2920 2921
		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. */
2922 2923

		ref_length = table->key_info[primary_key].key_length;
osku's avatar
osku committed
2924
	} else {
2925
		if (primary_key != MAX_KEY) {
osku's avatar
osku committed
2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936
		  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);
		}

osku's avatar
osku committed
2937
		prebuilt->clust_index_was_generated = TRUE;
osku's avatar
osku committed
2938

2939
		ref_length = DATA_ROW_ID_LEN;
osku's avatar
osku committed
2940 2941 2942 2943 2944 2945 2946 2947

		/* 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. */
2948

osku's avatar
osku committed
2949
		if (key_used_on_scan != MAX_KEY) {
2950 2951 2952 2953
			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
2954 2955 2956
		}
	}

marko's avatar
marko committed
2957
	stats.block_size = 16 * 1024;	/* Index block size in InnoDB: used by MySQL
osku's avatar
osku committed
2958 2959 2960 2961 2962
				in query optimization */

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

2963 2964 2965 2966 2967 2968 2969 2970 2971 2972
	/* 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) {

2973
			innobase_initialize_autoinc();
2974 2975 2976 2977 2978
		}

		dict_table_autoinc_unlock(prebuilt->table);
	}

2979 2980
	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);

2981
	DBUG_RETURN(0);
osku's avatar
osku committed
2982 2983
}

2984 2985 2986 2987 2988 2989
uint
ha_innobase::max_supported_key_part_length() const
{
	return(DICT_MAX_INDEX_COL_LEN - 1);
}

osku's avatar
osku committed
2990 2991 2992 2993 2994 2995 2996 2997
/**********************************************************************
Closes a handle to an InnoDB table. */

int
ha_innobase::close(void)
/*====================*/
				/* out: 0 */
{
2998 2999
	THD*	thd;

3000
	DBUG_ENTER("ha_innobase::close");
osku's avatar
osku committed
3001

3002 3003 3004 3005
	thd = current_thd;  // avoid calling current_thd twice, it may be slow
	if (thd != NULL) {
		innobase_release_temporary_latches(ht, thd);
	}
vasil's avatar
vasil committed
3006

osku's avatar
osku committed
3007
	row_prebuilt_free(prebuilt);
osku's avatar
osku committed
3008

marko's avatar
marko committed
3009
	my_free(upd_buff, MYF(0));
3010
	free_share(share);
osku's avatar
osku committed
3011 3012 3013 3014 3015 3016

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

	srv_active_wake_master_thread();

3017
	DBUG_RETURN(0);
osku's avatar
osku committed
3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031
}

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

/******************************************************************
Gets field offset for a field in a table. */
inline
uint
get_field_offset(
/*=============*/
			/* out: offset */
	TABLE*	table,	/* in: MySQL table object */
	Field*	field)	/* in: MySQL field object */
{
marko's avatar
marko committed
3032
	return((uint) (field->ptr - table->record[0]));
osku's avatar
osku committed
3033 3034 3035 3036 3037
}

/******************************************************************
Checks if a field in a record is SQL NULL. Uses the record format
information in table to track the null bit in record. */
marko's avatar
marko committed
3038
static inline
osku's avatar
osku committed
3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106
uint
field_in_record_is_null(
/*====================*/
			/* out: 1 if NULL, 0 otherwise */
	TABLE*	table,	/* in: MySQL table object */
	Field*	field,	/* in: MySQL field object */
	char*	record)	/* in: a row in MySQL format */
{
	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);
}

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

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

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

extern "C" {
/*****************************************************************
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
function, remember to update the prototype there! */

int
innobase_mysql_cmp(
/*===============*/
					/* out: 1, 0, -1, if a is greater,
					equal, less than b, respectively */
	int		mysql_type,	/* in: MySQL type */
	uint		charset_number,	/* in: number of the charset */
	unsigned char*	a,		/* in: data field */
	unsigned int	a_length,	/* in: data field length,
					not UNIV_SQL_NULL */
	unsigned char*	b,		/* in: data field */
	unsigned int	b_length)	/* in: data field length,
					not UNIV_SQL_NULL */
{
	CHARSET_INFO*		charset;
	enum_field_types	mysql_tp;
3107
	int			ret;
osku's avatar
osku committed
3108 3109 3110 3111 3112 3113 3114 3115

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

	mysql_tp = (enum_field_types) mysql_type;

	switch (mysql_tp) {

3116
	case MYSQL_TYPE_BIT:
osku's avatar
osku committed
3117 3118
	case MYSQL_TYPE_STRING:
	case MYSQL_TYPE_VAR_STRING:
marko's avatar
marko committed
3119 3120 3121 3122
	case MYSQL_TYPE_TINY_BLOB:
	case MYSQL_TYPE_MEDIUM_BLOB:
	case MYSQL_TYPE_BLOB:
	case MYSQL_TYPE_LONG_BLOB:
3123
	case MYSQL_TYPE_VARCHAR:
osku's avatar
osku committed
3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144
		/* 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);
			}
		}

3145 3146 3147 3148
		/* 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
3149

3150 3151 3152
		ret = charset->coll->strnncollsp(charset,
				  a, a_length,
						 b, b_length, 0);
osku's avatar
osku committed
3153
		if (ret < 0) {
3154
			return(-1);
osku's avatar
osku committed
3155
		} else if (ret > 0) {
3156
			return(1);
osku's avatar
osku committed
3157
		} else {
3158 3159
			return(0);
		}
osku's avatar
osku committed
3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185
	default:
		assert(0);
	}

	return(0);
}
}

/******************************************************************
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
VARCHAR and the new true VARCHAR in >= 5.0.3 by the 'prtype'. */
inline
ulint
get_innobase_type_from_mysql_type(
/*==============================*/
				/* out: DATA_BINARY, DATA_VARCHAR, ... */
	ulint*	unsigned_flag,	/* out: DATA_UNSIGNED if an 'unsigned type';
				at least ENUM and SET, and unsigned integer
				types are 'unsigned types' */
	Field*	field)		/* in: MySQL field */
{
	/* 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 */

marko's avatar
marko committed
3186 3187 3188 3189 3190
	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
3191 3192 3193 3194 3195 3196 3197 3198

	if (field->flags & UNSIGNED_FLAG) {

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

marko's avatar
marko committed
3199 3200
	if (field->real_type() == MYSQL_TYPE_ENUM
		|| field->real_type() == MYSQL_TYPE_SET) {
osku's avatar
osku committed
3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213

		/* 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()) {
3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237
		/* 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);
		}
marko's avatar
marko committed
3238
	case MYSQL_TYPE_NEWDECIMAL:
3239
		return(DATA_FIXBINARY);
marko's avatar
marko committed
3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250
	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:
3251
		return(DATA_INT);
marko's avatar
marko committed
3252
	case MYSQL_TYPE_FLOAT:
3253
		return(DATA_FLOAT);
marko's avatar
marko committed
3254
	case MYSQL_TYPE_DOUBLE:
3255
		return(DATA_DOUBLE);
marko's avatar
marko committed
3256
	case MYSQL_TYPE_DECIMAL:
3257
		return(DATA_DECIMAL);
marko's avatar
marko committed
3258 3259 3260 3261 3262
	case MYSQL_TYPE_GEOMETRY:
	case MYSQL_TYPE_TINY_BLOB:
	case MYSQL_TYPE_MEDIUM_BLOB:
	case MYSQL_TYPE_BLOB:
	case MYSQL_TYPE_LONG_BLOB:
3263
		return(DATA_BLOB);
3264 3265 3266 3267 3268
	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;
3269 3270
	default:
		assert(0);
osku's avatar
osku committed
3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298
	}

	return(0);
}

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

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

/***********************************************************************
Reads an unsigned integer value < 64k from 2 bytes, in the little-endian
storage format. */
inline
uint
innobase_read_from_2_little_endian(
/*===============================*/
3299 3300
				/* out: value */
	const uchar*	buf)	/* in: from where to read */
osku's avatar
osku committed
3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311
{
	return (uint) ((ulint)(buf[0]) + 256 * ((ulint)(buf[1])));
}

/***********************************************************************
Stores a key value for a row to a buffer. */

uint
ha_innobase::store_key_val_for_row(
/*===============================*/
				/* out: key value length as stored in buff */
3312
	uint		keynr,	/* in: key number */
osku's avatar
osku committed
3313 3314 3315
	char*		buff,	/* in/out: buffer for the key value (in MySQL
				format) */
	uint		buff_len,/* in: buffer length */
3316
	const uchar*	record)/* in: row in MySQL format */
osku's avatar
osku committed
3317
{
3318 3319 3320
	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
3321 3322 3323 3324 3325
	char*		buff_start	= buff;
	enum_field_types mysql_type;
	Field*		field;
	ibool		is_null;

3326
	DBUG_ENTER("store_key_val_for_row");
osku's avatar
osku committed
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

	/* 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);

3355 3356
	for (; key_part != end; key_part++) {
		is_null = FALSE;
osku's avatar
osku committed
3357

3358 3359
		if (key_part->null_bit) {
			if (record[key_part->null_offset]
osku's avatar
osku committed
3360 3361 3362
						& key_part->null_bit) {
				*buff = 1;
				is_null = TRUE;
3363
			} else {
osku's avatar
osku committed
3364 3365 3366
				*buff = 0;
			}
			buff++;
3367
		}
osku's avatar
osku committed
3368 3369 3370 3371 3372 3373 3374 3375 3376 3377

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

		if (mysql_type == MYSQL_TYPE_VARCHAR) {
						/* >= 5.0.3 true VARCHAR */
			ulint	lenlen;
			ulint	len;
			byte*	data;
			ulint	key_len;
3378
			ulint	true_len;
osku's avatar
osku committed
3379 3380 3381
			CHARSET_INFO*	cs;
			int	error=0;

3382 3383
			key_len = key_part->length;

osku's avatar
osku committed
3384
			if (is_null) {
3385
				buff += key_len + 2;
3386

osku's avatar
osku committed
3387 3388
				continue;
			}
3389
			cs = field->charset();
osku's avatar
osku committed
3390 3391 3392 3393

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

3394
			data = row_mysql_read_true_varchar(&len,
osku's avatar
osku committed
3395 3396 3397 3398
				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
				lenlen);

3399 3400
			true_len = len;

3401 3402 3403
			/* For multi byte character sets we need to calculate
			the true length of the key */

3404
			if (len > 0 && cs->mbmaxlen > 1) {
3405 3406
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) data,
3407
						(const char *) data + len,
marko's avatar
marko committed
3408 3409
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
3410 3411 3412
						&error);
			}

osku's avatar
osku committed
3413 3414 3415
			/* In a column prefix index, we may need to truncate
			the stored value: */

3416 3417
			if (true_len > key_len) {
				true_len = key_len;
osku's avatar
osku committed
3418 3419 3420 3421 3422
			}

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

3423
			row_mysql_store_true_var_len((byte*)buff, true_len, 2);
osku's avatar
osku committed
3424 3425
			buff += 2;

3426
			memcpy(buff, data, true_len);
osku's avatar
osku committed
3427 3428 3429 3430 3431 3432 3433

			/* 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. */

3434
			buff += key_len;
osku's avatar
osku committed
3435

marko's avatar
marko committed
3436 3437 3438
		} else if (mysql_type == MYSQL_TYPE_TINY_BLOB
			|| mysql_type == MYSQL_TYPE_MEDIUM_BLOB
			|| mysql_type == MYSQL_TYPE_BLOB
3439 3440 3441 3442
			|| 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
3443 3444 3445

			CHARSET_INFO*	cs;
			ulint		key_len;
3446
			ulint		true_len;
osku's avatar
osku committed
3447
			int		error=0;
3448 3449
			ulint		blob_len;
			byte*		blob_data;
osku's avatar
osku committed
3450 3451 3452

			ut_a(key_part->key_part_flag & HA_PART_KEY_SEG);

3453 3454
			key_len = key_part->length;

3455
			if (is_null) {
3456
				buff += key_len + 2;
3457

osku's avatar
osku committed
3458 3459
				continue;
			}
3460

3461 3462
			cs = field->charset();

3463
			blob_data = row_mysql_read_blob_ref(&blob_len,
osku's avatar
osku committed
3464 3465 3466 3467
				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
					(ulint) field->pack_length());

3468 3469
			true_len = blob_len;

osku's avatar
osku committed
3470
			ut_a(get_field_offset(table, field)
3471
				== key_part->offset);
osku's avatar
osku committed
3472

3473 3474
			/* For multi byte character sets we need to calculate
			the true length of the key */
3475

3476
			if (blob_len > 0 && cs->mbmaxlen > 1) {
3477 3478
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) blob_data,
3479
						(const char *) blob_data
3480
							+ blob_len,
marko's avatar
marko committed
3481 3482
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
3483 3484 3485
						&error);
			}

osku's avatar
osku committed
3486 3487 3488 3489
			/* 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: */

3490 3491
			if (true_len > key_len) {
				true_len = key_len;
osku's avatar
osku committed
3492 3493 3494 3495 3496 3497
			}

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

			innobase_write_to_2_little_endian(
3498
					(byte*)buff, true_len);
osku's avatar
osku committed
3499 3500
			buff += 2;

3501
			memcpy(buff, blob_data, true_len);
osku's avatar
osku committed
3502 3503 3504 3505

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

3506
			buff += key_len;
osku's avatar
osku committed
3507 3508 3509 3510 3511 3512 3513
		} 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;
3514 3515
			ulint			true_len;
			ulint			key_len;
3516
			const uchar*		src_start;
osku's avatar
osku committed
3517
			int			error=0;
3518 3519 3520
			enum_field_types	real_type;

			key_len = key_part->length;
osku's avatar
osku committed
3521

3522
			if (is_null) {
3523
				 buff += key_len;
3524

osku's avatar
osku committed
3525 3526 3527 3528
				 continue;
			}

			src_start = record + key_part->offset;
3529 3530 3531 3532
			real_type = field->real_type();
			true_len = key_len;

			/* Character set for the field is defined only
3533
			to fields whose type is string and real field
3534 3535 3536
			type is not enum or set. For these fields check
			if character set is multi byte. */

marko's avatar
marko committed
3537 3538
			if (real_type != MYSQL_TYPE_ENUM
				&& real_type != MYSQL_TYPE_SET
3539 3540 3541 3542 3543
				&& ( mysql_type == MYSQL_TYPE_VAR_STRING
					|| mysql_type == MYSQL_TYPE_STRING)) {

				cs = field->charset();

3544
				/* For multi byte character sets we need to
3545 3546 3547 3548
				calculate the true length of the key */

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

3549
					true_len = (ulint)
3550 3551
						cs->cset->well_formed_len(cs,
							(const char *)src_start,
3552
							(const char *)src_start
3553
								+ key_len,
marko's avatar
marko committed
3554 3555
                                                        (uint) (key_len /
                                                                cs->mbmaxlen),
3556 3557
							&error);
				}
osku's avatar
osku committed
3558 3559
			}

3560 3561
			memcpy(buff, src_start, true_len);
			buff += true_len;
osku's avatar
osku committed
3562

3563 3564 3565
			/* Pad the unused space with spaces. Note that no
			padding is ever needed for UCS-2 because in MySQL,
			all UCS2 characters are 2 bytes, as MySQL does not
3566 3567
			support surrogate pairs, which are needed to represent
			characters in the range U+10000 to U+10FFFF. */
osku's avatar
osku committed
3568

3569 3570 3571 3572
			if (true_len < key_len) {
				ulint pad_len = key_len - true_len;
				memset(buff, ' ', pad_len);
				buff += pad_len;
osku's avatar
osku committed
3573 3574
			}
		}
3575
	}
osku's avatar
osku committed
3576 3577 3578 3579 3580 3581 3582 3583 3584

	ut_a(buff <= buff_start + buff_len);

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

/******************************************************************
Builds a 'template' to the prebuilt struct. The template is used in fast
retrieval of just those column values MySQL needs in its processing. */
3585
static
osku's avatar
osku committed
3586
void
3587
build_template(
osku's avatar
osku committed
3588
/*===========*/
3589
	row_prebuilt_t*	prebuilt,	/* in/out: prebuilt struct */
osku's avatar
osku committed
3590 3591 3592 3593
	THD*		thd,		/* in: current user thread, used
					only if templ_type is
					ROW_MYSQL_REC_FIELDS */
	TABLE*		table,		/* in: MySQL table */
marko's avatar
marko committed
3594
	uint		templ_type)	/* in: ROW_MYSQL_WHOLE_ROW or
osku's avatar
osku committed
3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613
					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. */

3614
		templ_type = ROW_MYSQL_WHOLE_ROW;
osku's avatar
osku committed
3615 3616 3617
	}

	if (templ_type == ROW_MYSQL_REC_FIELDS) {
3618 3619
		if (prebuilt->hint_need_to_fetch_extra_cols
			== ROW_RETRIEVE_ALL_COLS) {
osku's avatar
osku committed
3620

3621 3622
			/* We know we must at least fetch all columns in the
			key, or all columns in the table */
osku's avatar
osku committed
3623

3624 3625 3626 3627 3628 3629 3630
			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
3631

3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645
				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
3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702
		}
	}

	clust_index = dict_table_get_first_index_noninline(prebuilt->table);

	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*)
						mem_alloc_noninline(
					n_fields * sizeof(mysql_row_templ_t));
	}

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

	prebuilt->templ_contains_blob = FALSE;

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

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

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

				goto skip_field;
			}

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

				goto include_field;
			}

3703 3704
			if (bitmap_is_set(table->read_set, i) ||
			    bitmap_is_set(table->write_set, i)) {
osku's avatar
osku committed
3705 3706 3707 3708 3709 3710
				/* This field is needed in the query */

				goto include_field;
			}

			if (fetch_primary_key_cols
3711 3712
				&& dict_table_col_in_clustered_key(
					index->table, i)) {
osku's avatar
osku committed
3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727
				/* This field is needed in the query */

				goto include_field;
			}

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

			goto skip_field;
		}
include_field:
		n_requested_fields++;

		templ->col_no = i;

		if (index == clust_index) {
3728 3729
			templ->rec_field_no = dict_col_get_clust_pos_noninline(
				&index->table->cols[i], index);
osku's avatar
osku committed
3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757
		} else {
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
		}

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

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

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

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

		templ->mysql_col_len = (ulint) field->pack_length();
		if (mysql_prefix_len < templ->mysql_col_offset
				+ templ->mysql_col_len) {
			mysql_prefix_len = templ->mysql_col_offset
				+ templ->mysql_col_len;
		}
3758
		templ->type = index->table->cols[i].mtype;
osku's avatar
osku committed
3759 3760 3761 3762
		templ->mysql_type = (ulint)field->type();

		if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR) {
			templ->mysql_length_bytes = (ulint)
3763
				(((Field_varstring*)field)->length_bytes);
osku's avatar
osku committed
3764
		}
3765

osku's avatar
osku committed
3766
		templ->charset = dtype_get_charset_coll_noninline(
3767 3768 3769 3770
				index->table->cols[i].prtype);
		templ->mbminlen = index->table->cols[i].mbminlen;
		templ->mbmaxlen = index->table->cols[i].mbmaxlen;
		templ->is_unsigned = index->table->cols[i].prtype
osku's avatar
osku committed
3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787
							& DATA_UNSIGNED;
		if (templ->type == DATA_BLOB) {
			prebuilt->templ_contains_blob = TRUE;
		}
skip_field:
		;
	}

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

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

3788 3789 3790
			templ->rec_field_no = dict_col_get_clust_pos_noninline(
				&index->table->cols[templ->col_no],
				clust_index);
osku's avatar
osku committed
3791 3792 3793 3794
		}
	}
}

3795 3796 3797 3798 3799 3800 3801 3802
/************************************************************************
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
the special lock handling.*/

ulong
3803
ha_innobase::innobase_lock_autoinc(void)
3804 3805 3806 3807 3808 3809
/*====================================*/
					/* out: DB_SUCCESS if all OK else
					error code */
{
	ulint		error = DB_SUCCESS;

3810 3811 3812
	switch (innobase_autoinc_lock_mode) {
	case AUTOINC_NO_LOCKING:
		/* Acquire only the AUTOINC mutex. */
3813
		dict_table_autoinc_lock(prebuilt->table);
3814
		break;
3815

3816 3817 3818 3819 3820
	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. */
3821 3822
		if (thd_sql_command(user_thd) == SQLCOM_INSERT
		    || thd_sql_command(user_thd) == SQLCOM_REPLACE) {
3823
			dict_table_t*	table = prebuilt->table;
3824 3825

			/* Acquire the AUTOINC mutex. */
3826
			dict_table_autoinc_lock(table);
3827

3828 3829 3830
			/* 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) {
3831
				/* Release the mutex to avoid deadlocks. */
3832
				dict_table_autoinc_unlock(table);
3833 3834 3835
			} else {
				break;
			}
3836
		}
3837 3838 3839
		/* Fall through to old style locking. */

	case AUTOINC_OLD_STYLE_LOCKING:
3840 3841 3842
		error = row_lock_table_autoinc_for_mysql(prebuilt);

		if (error == DB_SUCCESS) {
3843 3844

			/* Acquire the AUTOINC mutex. */
3845 3846
			dict_table_autoinc_lock(prebuilt->table);
		}
3847 3848 3849 3850
		break;

	default:
		ut_error;
3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867
	}

	return(ulong(error));
}

/************************************************************************
Reset the autoinc value in the table.*/

ulong
ha_innobase::innobase_reset_autoinc(
/*================================*/
					/* out: DB_SUCCESS if all went well
					else error code */
	ulonglong	autoinc)	/* in: value to store */
{
	ulint		error;

3868
	error = innobase_lock_autoinc();
3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892

	if (error == DB_SUCCESS) {

		dict_table_autoinc_initialize(prebuilt->table, autoinc);

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

/************************************************************************
Store the autoinc value in the table. The autoinc value is only set if
it's greater than the existing autoinc value in the table.*/

ulong
ha_innobase::innobase_set_max_autoinc(
/*==================================*/
					/* out: DB_SUCCES if all went well
					else error code */
	ulonglong	auto_inc)	/* in: value to store */
{
	ulint		error;

3893
	error = innobase_lock_autoinc();
3894 3895 3896

	if (error == DB_SUCCESS) {

3897
		dict_table_autoinc_update_if_greater(prebuilt->table, auto_inc);
3898 3899 3900 3901 3902 3903 3904

		dict_table_autoinc_unlock(prebuilt->table);
	}

	return(ulong(error));
}

osku's avatar
osku committed
3905 3906 3907 3908 3909 3910 3911
/************************************************************************
Stores a row in an InnoDB database, to the table specified in this
handle. */

int
ha_innobase::write_row(
/*===================*/
3912 3913
			/* out: error code */
	uchar*	record)	/* in: a row in MySQL format */
osku's avatar
osku committed
3914
{
vasil's avatar
vasil committed
3915 3916
	ulint		error = 0;
        int             error_result= 0;
3917
	ibool		auto_inc_used= FALSE;
3918
	ulint		sql_command;
3919
	trx_t*		trx = thd_to_trx(user_thd);
osku's avatar
osku committed
3920

3921
	DBUG_ENTER("ha_innobase::write_row");
osku's avatar
osku committed
3922

3923
	if (prebuilt->trx != trx) {
osku's avatar
osku committed
3924 3925
	  sql_print_error("The transaction object for the table handle is at "
			  "%p, but for the current thread it is at %p",
3926
			  prebuilt->trx, trx);
osku's avatar
osku committed
3927 3928 3929 3930

		fputs("InnoDB: Dump of 200 bytes around prebuilt: ", stderr);
		ut_print_buf(stderr, ((const byte*)prebuilt) - 100, 200);
		fputs("\n"
3931
			"InnoDB: Dump of 200 bytes around ha_data: ",
osku's avatar
osku committed
3932
			stderr);
3933
		ut_print_buf(stderr, ((const byte*) trx) - 100, 200);
osku's avatar
osku committed
3934 3935 3936 3937
		putc('\n', stderr);
		ut_error;
	}

3938
	ha_statistic_increment(&SSV::ha_write_count);
osku's avatar
osku committed
3939

3940 3941
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
		table->timestamp_field->set_time();
osku's avatar
osku committed
3942

3943 3944 3945 3946 3947 3948 3949
	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
3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976
		/* 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;
		ulint		mode;

		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,
3977
				"  InnoDB: ALTER TABLE is holding lock"
osku's avatar
osku committed
3978 3979 3980 3981 3982 3983 3984 3985 3986
				" 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 */
3987
			innobase_commit(ht, user_thd, 1);
osku's avatar
osku committed
3988 3989 3990
			/* Note that this transaction is still active. */
			prebuilt->trx->active_trans = 1;
			/* We will need an IX lock on the destination table. */
3991
			prebuilt->sql_stat_start = TRUE;
osku's avatar
osku committed
3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002
		} 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. */
4003
			innobase_commit(ht, user_thd, 1);
osku's avatar
osku committed
4004 4005 4006 4007 4008
			/* Note that this transaction is still active. */
			prebuilt->trx->active_trans = 1;
			/* Re-acquire the table lock on the source table. */
			row_lock_table_for_mysql(prebuilt, src_table, mode);
			/* We will need an IX lock on the destination table. */
4009
			prebuilt->sql_stat_start = TRUE;
osku's avatar
osku committed
4010 4011 4012 4013 4014
		}
	}

	num_write_row++;

4015
	/* This is the case where the table has an auto-increment column */
4016
	if (table->next_number_field && record == table->record[0]) {
osku's avatar
osku committed
4017

4018 4019 4020 4021
		/* Reset the error code before calling
		innobase_get_auto_increment(). */
		prebuilt->autoinc_error = DB_SUCCESS;

4022
		if ((error = update_auto_increment())) {
4023 4024
			/* We don't want to mask autoinc overflow errors. */

sunny's avatar
sunny committed
4025 4026 4027 4028 4029 4030 4031 4032 4033
			/* 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;
4034 4035 4036 4037
				goto report_error;
			}

			/* MySQL errors are passed straight back. */
vasil's avatar
vasil committed
4038
			error_result = (int) error;
osku's avatar
osku committed
4039 4040 4041
			goto func_exit;
		}

4042
		auto_inc_used = TRUE;
osku's avatar
osku committed
4043 4044 4045
	}

	if (prebuilt->mysql_template == NULL
4046 4047
	    || prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) {

osku's avatar
osku committed
4048 4049 4050 4051 4052 4053 4054 4055 4056 4057
		/* 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);

4058 4059
	/* Handle duplicate key errors */
	if (auto_inc_used) {
4060
		ulint		err;
4061
		ulonglong	auto_inc;
4062
		ulonglong	col_max_value;
osku's avatar
osku committed
4063

4064 4065 4066 4067 4068 4069 4070
		/* 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
4071

4072 4073 4074 4075 4076
		/* 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);

4077
		/* Get the value that MySQL attempted to store in the table.*/
4078
		auto_inc = table->next_number_field->val_int();
osku's avatar
osku committed
4079

4080 4081
		switch (error) {
		case DB_DUPLICATE_KEY:
osku's avatar
osku committed
4082

4083 4084 4085 4086
			/* 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
4087

4088 4089 4090 4091
			switch (sql_command) {
			case SQLCOM_LOAD:
				if ((trx->duplicates
				    & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))) {
osku's avatar
osku committed
4092

4093 4094 4095
					goto set_max_autoinc;
				}
				break;
osku's avatar
osku committed
4096

4097 4098 4099 4100 4101
			case SQLCOM_REPLACE:
			case SQLCOM_INSERT_SELECT:
			case SQLCOM_REPLACE_SELECT:
				goto set_max_autoinc;
				break;
osku's avatar
osku committed
4102

4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114
			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.*/

4115
			if (auto_inc >= prebuilt->autoinc_last_value) {
4116
set_max_autoinc:
4117 4118 4119 4120
				/* This should filter out the negative
				values set explicitly by the user. */
				if (auto_inc <= col_max_value) {
					ut_a(prebuilt->autoinc_increment > 0);
4121

4122 4123
					ulonglong	need;
					ulonglong	offset;
4124

4125 4126
					offset = prebuilt->autoinc_offset;
					need = prebuilt->autoinc_increment;
4127

4128 4129 4130
					auto_inc = innobase_next_autoinc(
						auto_inc,
						need, offset, col_max_value);
4131

4132 4133
					err = innobase_set_max_autoinc(
						auto_inc);
4134

4135 4136 4137
					if (err != DB_SUCCESS) {
						error = err;
					}
4138
				}
4139 4140
			}
			break;
4141 4142
		}
	}
osku's avatar
osku committed
4143 4144 4145

	innodb_srv_conc_exit_innodb(prebuilt->trx);

4146
report_error:
vasil's avatar
vasil committed
4147
	error_result = convert_error_code_to_mysql((int) error, user_thd);
osku's avatar
osku committed
4148 4149 4150 4151

func_exit:
	innobase_active_small();

vasil's avatar
vasil committed
4152
	DBUG_RETURN(error_result);
osku's avatar
osku committed
4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163
}

/**************************************************************************
Checks which fields have changed in a row and stores information
of them to an update vector. */
static
int
calc_row_difference(
/*================*/
					/* out: error number or 0 */
	upd_t*		uvect,		/* in/out: update vector */
4164 4165
	uchar*		old_row,	/* in: old row in MySQL format */
	uchar*		new_row,	/* in: new row in MySQL format */
osku's avatar
osku committed
4166 4167
	struct st_table* table,		/* in: table in MySQL data
					dictionary */
4168
	uchar*		upd_buff,	/* in: buffer to use */
osku's avatar
osku committed
4169 4170 4171 4172
	ulint		buff_len,	/* in: buffer length */
	row_prebuilt_t*	prebuilt,	/* in: InnoDB prebuilt struct */
	THD*		thd)		/* in: user thread */
{
4173
	uchar*		original_upd_buff = upd_buff;
osku's avatar
osku committed
4174 4175 4176 4177 4178 4179 4180
	Field*		field;
	enum_field_types field_mysql_type;
	uint		n_fields;
	ulint		o_len;
	ulint		n_len;
	ulint		col_pack_len;
	byte*		new_mysql_row_col;
4181 4182 4183
	byte*		o_ptr;
	byte*		n_ptr;
	byte*		buf;
osku's avatar
osku committed
4184 4185 4186 4187
	upd_field_t*	ufield;
	ulint		col_type;
	ulint		n_changed = 0;
	dfield_t	dfield;
marko's avatar
marko committed
4188
	dict_index_t*	clust_index;
osku's avatar
osku committed
4189 4190 4191
	uint		i;

	n_fields = table->s->fields;
marko's avatar
marko committed
4192
	clust_index = dict_table_get_first_index_noninline(prebuilt->table);
osku's avatar
osku committed
4193 4194 4195 4196 4197 4198 4199 4200 4201

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

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

		o_ptr = (byte*) old_row + get_field_offset(table, field);
		n_ptr = (byte*) new_row + get_field_offset(table, field);
4202

osku's avatar
osku committed
4203 4204 4205 4206 4207 4208 4209 4210 4211
		/* 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
4212
		comparison. */
osku's avatar
osku committed
4213 4214

		field_mysql_type = field->type();
4215

4216
		col_type = prebuilt->table->cols[i].mtype;
osku's avatar
osku committed
4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232

		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 */
4233

osku's avatar
osku committed
4234
				o_ptr = row_mysql_read_true_varchar(
4235 4236 4237 4238
					&o_len, o_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));

osku's avatar
osku committed
4239
				n_ptr = row_mysql_read_true_varchar(
4240 4241 4242
					&n_len, n_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));
osku's avatar
osku committed
4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266
			}

			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;
4267

osku's avatar
osku committed
4268 4269 4270
			/* Let us use a dummy dfield to make the conversion
			from the MySQL column format to the InnoDB format */

4271 4272
			dict_col_copy_type_noninline(prebuilt->table->cols + i,
						     &dfield.type);
osku's avatar
osku committed
4273 4274 4275

			if (n_len != UNIV_SQL_NULL) {
				buf = row_mysql_store_col_in_innobase_format(
4276 4277 4278 4279 4280
					&dfield,
					(byte*)buf,
					TRUE,
					new_mysql_row_col,
					col_pack_len,
4281 4282
					dict_table_is_comp_noninline(
							prebuilt->table));
osku's avatar
osku committed
4283 4284 4285 4286 4287 4288 4289 4290
				ufield->new_val.data = dfield.data;
				ufield->new_val.len = dfield.len;
			} else {
				ufield->new_val.data = NULL;
				ufield->new_val.len = UNIV_SQL_NULL;
			}

			ufield->exp = NULL;
4291 4292
			ufield->field_no = dict_col_get_clust_pos_noninline(
				&prebuilt->table->cols[i], clust_index);
osku's avatar
osku committed
4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316
			n_changed++;
		}
	}

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

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

	return(0);
}

/**************************************************************************
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
if its index columns are updated! */

int
ha_innobase::update_row(
/*====================*/
					/* out: error number or 0 */
4317 4318
	const uchar*	old_row,	/* in: old row in MySQL format */
	uchar*		new_row)	/* in: new row in MySQL format */
osku's avatar
osku committed
4319 4320 4321
{
	upd_t*		uvect;
	int		error = 0;
4322
	trx_t*		trx = thd_to_trx(user_thd);
osku's avatar
osku committed
4323 4324 4325

	DBUG_ENTER("ha_innobase::update_row");

4326
	ut_a(prebuilt->trx == trx);
osku's avatar
osku committed
4327

4328 4329
	ha_statistic_increment(&SSV::ha_update_count);

4330 4331
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
		table->timestamp_field->set_time();
osku's avatar
osku committed
4332 4333 4334 4335 4336 4337 4338 4339 4340 4341

	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) */

4342
	calc_row_difference(uvect, (uchar*) old_row, new_row, table,
osku's avatar
osku committed
4343 4344 4345 4346 4347 4348 4349 4350
			upd_buff, (ulint)upd_and_key_val_buff_len,
			prebuilt, user_thd);

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

	assert(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);

4351
	innodb_srv_conc_enter_innodb(trx);
osku's avatar
osku committed
4352 4353 4354

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

4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369
	/* 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)  {

4370 4371
		ulonglong	auto_inc;
		ulonglong	col_max_value;
4372 4373 4374

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

4375 4376 4377 4378 4379
		/* 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);

4380
		if (auto_inc <= col_max_value && auto_inc != 0) {
4381 4382 4383 4384 4385 4386 4387 4388

			ulonglong	need;
			ulonglong	offset;

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

			auto_inc = innobase_next_autoinc(
4389
				auto_inc, need, offset, col_max_value);
4390

4391
			error = innobase_set_max_autoinc(auto_inc);
4392 4393 4394
		}
	}

4395
	innodb_srv_conc_exit_innodb(trx);
osku's avatar
osku committed
4396 4397 4398

	error = convert_error_code_to_mysql(error, user_thd);

vasil's avatar
vasil committed
4399 4400 4401 4402 4403 4404 4405 4406 4407 4408
	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
4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422
	/* Tell InnoDB server that there might be work for
	utility threads: */

	innobase_active_small();

	DBUG_RETURN(error);
}

/**************************************************************************
Deletes a row given as the parameter. */

int
ha_innobase::delete_row(
/*====================*/
4423 4424
				/* out: error number or 0 */
	const uchar*	record)	/* in: a row in MySQL format */
osku's avatar
osku committed
4425 4426
{
	int		error = 0;
4427
	trx_t*		trx = thd_to_trx(user_thd);
osku's avatar
osku committed
4428 4429 4430

	DBUG_ENTER("ha_innobase::delete_row");

4431
	ut_a(prebuilt->trx == trx);
osku's avatar
osku committed
4432

4433 4434
	ha_statistic_increment(&SSV::ha_delete_count);

osku's avatar
osku committed
4435 4436 4437 4438 4439 4440 4441 4442
	if (!prebuilt->upd_node) {
		row_get_prebuilt_update_vector(prebuilt);
	}

	/* This is a delete */

	prebuilt->upd_node->is_delete = TRUE;

4443
	innodb_srv_conc_enter_innodb(trx);
osku's avatar
osku committed
4444 4445 4446

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

4447
	innodb_srv_conc_exit_innodb(trx);
osku's avatar
osku committed
4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459

	error = convert_error_code_to_mysql(error, user_thd);

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

	innobase_active_small();

	DBUG_RETURN(error);
}

/**************************************************************************
4460
Removes a new lock set on a row, if it was not read optimistically. This can
4461 4462
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. */
osku's avatar
osku committed
4463 4464 4465 4466 4467 4468 4469

void
ha_innobase::unlock_row(void)
/*=========================*/
{
	DBUG_ENTER("ha_innobase::unlock_row");

4470 4471 4472 4473 4474 4475 4476
	/* Consistent read does not take any locks, thus there is
	nothing to unlock. */

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

4477 4478
	switch (prebuilt->row_read_type) {
	case ROW_READ_WITH_LOCKS:
4479
		if (!srv_locks_unsafe_for_binlog
marko's avatar
marko committed
4480
		    && prebuilt->trx->isolation_level
4481
		    > TRX_ISO_READ_COMMITTED) {
4482 4483 4484 4485
			break;
		}
		/* fall through */
	case ROW_READ_TRY_SEMI_CONSISTENT:
osku's avatar
osku committed
4486
		row_unlock_for_mysql(prebuilt, FALSE);
4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508
		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. */
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. */
void
ha_innobase::try_semi_consistent_read(bool yes)
/*===========================================*/
{
4509
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
4510

4511 4512 4513 4514 4515
	/* 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. */

4516 4517
	if (yes
	    && (srv_locks_unsafe_for_binlog
4518
		|| prebuilt->trx->isolation_level <= TRX_ISO_READ_COMMITTED)) {
4519 4520 4521
		prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT;
	} else {
		prebuilt->row_read_type = ROW_READ_WITH_LOCKS;
osku's avatar
osku committed
4522 4523 4524 4525 4526 4527 4528 4529 4530 4531
	}
}

/**********************************************************************
Initializes a handle to use an index. */

int
ha_innobase::index_init(
/*====================*/
			/* out: 0 or error number */
4532 4533
	uint	keynr,	/* in: key (index) number */
	bool sorted)	/* in: 1 if result MUST be sorted according to index */
osku's avatar
osku committed
4534
{
4535 4536
	int	error	= 0;
	DBUG_ENTER("index_init");
osku's avatar
osku committed
4537 4538 4539

	error = change_active_index(keynr);

4540
	DBUG_RETURN(error);
osku's avatar
osku committed
4541 4542 4543 4544 4545 4546 4547 4548 4549
}

/**********************************************************************
Currently does nothing. */

int
ha_innobase::index_end(void)
/*========================*/
{
4550 4551 4552 4553
	int	error	= 0;
	DBUG_ENTER("index_end");
	active_index=MAX_KEY;
	DBUG_RETURN(error);
osku's avatar
osku committed
4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565
}

/*************************************************************************
Converts a search mode flag understood by MySQL to a flag understood
by InnoDB. */
inline
ulint
convert_search_mode_to_innobase(
/*============================*/
	enum ha_rkey_function	find_flag)
{
	switch (find_flag) {
4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599
	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:
4600
	case HA_READ_MBR_EQUAL:
4601 4602 4603 4604
		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) */
osku's avatar
osku committed
4605 4606
	}

4607 4608 4609
	my_error(ER_CHECK_NOT_IMPLEMENTED, MYF(0), "this functionality");

	return(PAGE_CUR_UNSUPP);
osku's avatar
osku committed
4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669
}

/*
   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. */


/**************************************************************************
Positions an index cursor to the index specified in the handle. Fetches the
row if any. */

int
ha_innobase::index_read(
/*====================*/
					/* out: 0, HA_ERR_KEY_NOT_FOUND,
					or error number */
4670
	uchar*		buf,		/* in/out: buffer for the returned
osku's avatar
osku committed
4671
					row */
4672
	const uchar*	key_ptr,	/* in: key value; if this is NULL
osku's avatar
osku committed
4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685
					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 */
	uint			key_len,/* in: key value length */
	enum ha_rkey_function find_flag)/* in: search flags from my_base.h */
{
	ulint		mode;
	dict_index_t*	index;
4686 4687
	ulint		match_mode	= 0;
	int		error;
osku's avatar
osku committed
4688 4689
	ulint		ret;

4690
	DBUG_ENTER("index_read");
osku's avatar
osku committed
4691

4692
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
osku's avatar
osku committed
4693

4694
	ha_statistic_increment(&SSV::ha_read_key_count);
osku's avatar
osku committed
4695 4696 4697 4698

	index = prebuilt->index;

	/* Note that if the index for which the search template is built is not
4699
	necessarily prebuilt->index, but can also be the clustered index */
osku's avatar
osku committed
4700 4701 4702 4703 4704 4705 4706

	if (prebuilt->sql_stat_start) {
		build_template(prebuilt, user_thd, table,
							ROW_MYSQL_REC_FIELDS);
	}

	if (key_ptr) {
4707
		/* Convert the search key value to InnoDB format into
osku's avatar
osku committed
4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719
		prebuilt->search_tuple */

		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);
	} else {
		/* We position the cursor to the last or the first entry
		in the index */

4720
		dtuple_set_n_fields(prebuilt->search_tuple, 0);
osku's avatar
osku committed
4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736
	}

	mode = convert_search_mode_to_innobase(find_flag);

	match_mode = 0;

	if (find_flag == HA_READ_KEY_EXACT) {
		match_mode = ROW_SEL_EXACT;

	} else if (find_flag == HA_READ_PREFIX
				|| find_flag == HA_READ_PREFIX_LAST) {
		match_mode = ROW_SEL_EXACT_PREFIX;
	}

	last_match_mode = (uint) match_mode;

4737
	if (mode != PAGE_CUR_UNSUPP) {
osku's avatar
osku committed
4738

4739
		innodb_srv_conc_enter_innodb(prebuilt->trx);
osku's avatar
osku committed
4740

4741 4742 4743 4744 4745 4746 4747 4748
		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
4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775

	if (ret == DB_SUCCESS) {
		error = 0;
		table->status = 0;

	} else if (ret == DB_RECORD_NOT_FOUND) {
		error = HA_ERR_KEY_NOT_FOUND;
		table->status = STATUS_NOT_FOUND;

	} else if (ret == DB_END_OF_INDEX) {
		error = HA_ERR_KEY_NOT_FOUND;
		table->status = STATUS_NOT_FOUND;
	} else {
		error = convert_error_code_to_mysql((int) ret, user_thd);
		table->status = STATUS_NOT_FOUND;
	}

	DBUG_RETURN(error);
}

/***********************************************************************
The following functions works like index_read, but it find the last
row with the current key value or prefix. */

int
ha_innobase::index_read_last(
/*=========================*/
4776 4777 4778 4779 4780 4781 4782
				/* out: 0, HA_ERR_KEY_NOT_FOUND, or an
				error code */
	uchar*		buf,	/* out: fetched row */
	const uchar*	key_ptr,/* in: key value, or a prefix of a full
				key value */
	uint		key_len)/* in: length of the key val or prefix
				in bytes */
osku's avatar
osku committed
4783
{
4784
	return(index_read(buf, key_ptr, key_len, HA_READ_PREFIX_LAST));
osku's avatar
osku committed
4785 4786 4787
}

/************************************************************************
4788
Get the index for a handle. Does not change active index.*/
osku's avatar
osku committed
4789

4790 4791 4792 4793 4794 4795 4796
dict_index_t*
ha_innobase::innobase_get_index(
/*============================*/
				/* out: NULL or index instance. */
	uint		keynr)	/* in: use this index; MAX_KEY means always
				clustered index, even if it was internally
				generated by InnoDB */
osku's avatar
osku committed
4797
{
4798 4799 4800 4801
	KEY*		key = 0;
	dict_index_t*	index = 0;

	DBUG_ENTER("innobase_get_index");
4802
	ha_statistic_increment(&SSV::ha_read_key_count);
osku's avatar
osku committed
4803

4804
	ut_ad(user_thd == ha_thd());
4805
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
osku's avatar
osku committed
4806 4807

	if (keynr != MAX_KEY && table->s->keys > 0) {
4808
		key = table->key_info + keynr;
osku's avatar
osku committed
4809

4810
		index = dict_table_get_index_noninline(
4811 4812
			prebuilt->table, key->name);
	} else {
4813
		index = dict_table_get_first_index_noninline(prebuilt->table);
osku's avatar
osku committed
4814 4815
	}

4816
	if (!index) {
4817 4818 4819 4820 4821
		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);
4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843
	}

	DBUG_RETURN(index);
}

/************************************************************************
Changes the active index of a handle. */

int
ha_innobase::change_active_index(
/*=============================*/
			/* out: 0 or error code */
	uint	keynr)	/* in: use this index; MAX_KEY means always clustered
			index, even if it was internally generated by
			InnoDB */
{
	DBUG_ENTER("change_active_index");

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

	active_index = keynr;
4844

4845 4846 4847
	prebuilt->index = innobase_get_index(keynr);

	if (!prebuilt->index) {
4848
		DBUG_RETURN(1);
osku's avatar
osku committed
4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877
	}

	assert(prebuilt->search_tuple != 0);

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

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

	/* 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);
}

/**************************************************************************
Positions an index cursor to the index specified in keynr. Fetches the
row if any. */
/* ??? This is only used to read whole keys ??? */

int
ha_innobase::index_read_idx(
/*========================*/
					/* out: error number or 0 */
4878
	uchar*		buf,		/* in/out: buffer for the returned
osku's avatar
osku committed
4879
					row */
4880
	uint		keynr,		/* in: use this index */
4881
	const uchar*	key,		/* in: key value; if this is NULL
osku's avatar
osku committed
4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903
					we position the cursor at the
					start or end of index */
	uint		key_len,	/* in: key value length */
	enum ha_rkey_function find_flag)/* in: search flags from my_base.h */
{
	if (change_active_index(keynr)) {

		return(1);
	}

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

/***************************************************************************
Reads the next or previous row from a cursor, which must have previously been
positioned using index_read. */

int
ha_innobase::general_fetch(
/*=======================*/
				/* out: 0, HA_ERR_END_OF_FILE, or error
				number */
4904
	uchar*	buf,		/* in/out: buffer for next row in MySQL
osku's avatar
osku committed
4905
				format */
4906
	uint	direction,	/* in: ROW_SEL_NEXT or ROW_SEL_PREV */
osku's avatar
osku committed
4907 4908 4909 4910 4911 4912 4913 4914
	uint	match_mode)	/* in: 0, ROW_SEL_EXACT, or
				ROW_SEL_EXACT_PREFIX */
{
	ulint		ret;
	int		error	= 0;

	DBUG_ENTER("general_fetch");

4915
	ut_a(prebuilt->trx == thd_to_trx(user_thd));
osku's avatar
osku committed
4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950

	innodb_srv_conc_enter_innodb(prebuilt->trx);

	ret = row_search_for_mysql((byte*)buf, 0, prebuilt, match_mode,
								direction);
	innodb_srv_conc_exit_innodb(prebuilt->trx);

	if (ret == DB_SUCCESS) {
		error = 0;
		table->status = 0;

	} else if (ret == DB_RECORD_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;

	} else if (ret == DB_END_OF_INDEX) {
		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;
	} else {
		error = convert_error_code_to_mysql((int) ret, user_thd);
		table->status = STATUS_NOT_FOUND;
	}

	DBUG_RETURN(error);
}

/***************************************************************************
Reads the next row from a cursor, which must have previously been
positioned using index_read. */

int
ha_innobase::index_next(
/*====================*/
				/* out: 0, HA_ERR_END_OF_FILE, or error
				number */
4951
	uchar*		buf)	/* in/out: buffer for next row in MySQL
osku's avatar
osku committed
4952 4953
				format */
{
4954
	ha_statistic_increment(&SSV::ha_read_next_count);
osku's avatar
osku committed
4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966

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

/***********************************************************************
Reads the next row matching to the key value given as the parameter. */

int
ha_innobase::index_next_same(
/*=========================*/
				/* out: 0, HA_ERR_END_OF_FILE, or error
				number */
4967 4968
	uchar*		buf,	/* in/out: buffer for the row */
	const uchar*	key,	/* in: key value */
4969
	uint		keylen)	/* in: key value length */
osku's avatar
osku committed
4970
{
4971
	ha_statistic_increment(&SSV::ha_read_next_count);
osku's avatar
osku committed
4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982

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

/***************************************************************************
Reads the previous row from a cursor, which must have previously been
positioned using index_read. */

int
ha_innobase::index_prev(
/*====================*/
4983 4984
			/* out: 0, HA_ERR_END_OF_FILE, or error number */
	uchar*	buf)	/* in/out: buffer for previous row in MySQL format */
osku's avatar
osku committed
4985
{
4986
	ha_statistic_increment(&SSV::ha_read_prev_count);
4987

osku's avatar
osku committed
4988 4989 4990 4991 4992 4993 4994 4995 4996 4997
	return(general_fetch(buf, ROW_SEL_PREV, 0));
}

/************************************************************************
Positions a cursor on the first record in an index and reads the
corresponding row to buf. */

int
ha_innobase::index_first(
/*=====================*/
4998 4999
			/* out: 0, HA_ERR_END_OF_FILE, or error code */
	uchar*	buf)	/* in/out: buffer for the row */
osku's avatar
osku committed
5000 5001 5002
{
	int	error;

5003
	DBUG_ENTER("index_first");
5004
	ha_statistic_increment(&SSV::ha_read_first_count);
osku's avatar
osku committed
5005

5006
	error = index_read(buf, NULL, 0, HA_READ_AFTER_KEY);
osku's avatar
osku committed
5007

5008
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
osku's avatar
osku committed
5009

5010 5011 5012
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
osku's avatar
osku committed
5013

5014
	DBUG_RETURN(error);
osku's avatar
osku committed
5015 5016 5017 5018 5019 5020 5021 5022 5023
}

/************************************************************************
Positions a cursor on the last record in an index and reads the
corresponding row to buf. */

int
ha_innobase::index_last(
/*====================*/
5024 5025
			/* out: 0, HA_ERR_END_OF_FILE, or error code */
	uchar*	buf)	/* in/out: buffer for the row */
osku's avatar
osku committed
5026 5027 5028
{
	int	error;

5029
	DBUG_ENTER("index_last");
5030
	ha_statistic_increment(&SSV::ha_read_last_count);
osku's avatar
osku committed
5031

5032
	error = index_read(buf, NULL, 0, HA_READ_BEFORE_KEY);
osku's avatar
osku committed
5033

5034
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
osku's avatar
osku committed
5035

5036 5037 5038
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
osku's avatar
osku committed
5039

5040
	DBUG_RETURN(error);
osku's avatar
osku committed
5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062
}

/********************************************************************
Initialize a table scan. */

int
ha_innobase::rnd_init(
/*==================*/
			/* out: 0 or error number */
	bool	scan)	/* in: ???????? */
{
	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);
	}

5063 5064 5065 5066 5067 5068 5069
	/* 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);
	}

5070
	start_of_scan = 1;
osku's avatar
osku committed
5071

5072
	return(err);
osku's avatar
osku committed
5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093
}

/*********************************************************************
Ends a table scan. */

int
ha_innobase::rnd_end(void)
/*======================*/
				/* out: 0 or error number */
{
	return(index_end());
}

/*********************************************************************
Reads the next row in a table scan (also used to read the FIRST row
in a table scan). */

int
ha_innobase::rnd_next(
/*==================*/
			/* out: 0, HA_ERR_END_OF_FILE, or error number */
5094
	uchar*	buf)	/* in/out: returns the row in this buffer,
osku's avatar
osku committed
5095 5096 5097 5098
			in MySQL format */
{
	int	error;

5099
	DBUG_ENTER("rnd_next");
5100
	ha_statistic_increment(&SSV::ha_read_rnd_next_count);
osku's avatar
osku committed
5101

5102
	if (start_of_scan) {
osku's avatar
osku committed
5103 5104 5105 5106 5107 5108 5109 5110 5111
		error = index_first(buf);
		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
		start_of_scan = 0;
	} else {
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
	}

5112
	DBUG_RETURN(error);
osku's avatar
osku committed
5113 5114 5115 5116 5117 5118 5119 5120
}

/**************************************************************************
Fetches a row from the table based on a row reference. */

int
ha_innobase::rnd_pos(
/*=================*/
5121 5122 5123 5124 5125 5126
			/* out: 0, HA_ERR_KEY_NOT_FOUND, or error code */
	uchar*	buf,	/* in/out: buffer for the row */
	uchar*	pos)	/* in: primary key value of the row in the
			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
5127 5128 5129 5130
{
	int		error;
	uint		keynr	= active_index;
	DBUG_ENTER("rnd_pos");
marko's avatar
marko committed
5131
	DBUG_DUMP("key", pos, ref_length);
osku's avatar
osku committed
5132

5133
	ha_statistic_increment(&SSV::ha_read_rnd_count);
osku's avatar
osku committed
5134

5135
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
osku's avatar
osku committed
5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148

	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) {
marko's avatar
marko committed
5149
		DBUG_PRINT("error", ("Got error: %d", error));
osku's avatar
osku committed
5150 5151 5152 5153
		DBUG_RETURN(error);
	}

	/* Note that we assume the length of the row reference is fixed
5154
	for the table, and it is == ref_length */
osku's avatar
osku committed
5155 5156 5157 5158

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

	if (error) {
marko's avatar
marko committed
5159
		DBUG_PRINT("error", ("Got error: %d", error));
osku's avatar
osku committed
5160 5161 5162 5163
	}

	change_active_index(keynr);

5164
	DBUG_RETURN(error);
osku's avatar
osku committed
5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178
}

/*************************************************************************
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. */

void
ha_innobase::position(
/*==================*/
5179
	const uchar*	record)	/* in: row in MySQL format */
osku's avatar
osku committed
5180 5181 5182
{
	uint		len;

5183
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
osku's avatar
osku committed
5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200

	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. */
5201

osku's avatar
osku committed
5202 5203
	if (len != ref_length) {
	  sql_print_error("Stored ref len is %lu, but table ref len is %lu",
5204
			  (ulong) len, (ulong) ref_length);
osku's avatar
osku committed
5205 5206 5207
	}
}

5208 5209 5210
/*********************************************************************
If it's a DB_TOO_BIG_RECORD error then set a suitable message to
return to the client.*/
5211
inline
5212 5213
void
innodb_check_for_record_too_big_error(
5214
/*==================================*/
5215 5216
	ulint	comp,	/* in: ROW_FORMAT: nonzero=COMPACT, 0=REDUNDANT */
	int	error)	/* in: error code to check */
5217 5218
{
	if (error == (int)DB_TOO_BIG_RECORD) {
5219 5220
		ulint	max_row_size
			= page_get_free_space_of_empty_noninline(comp) / 2;
5221 5222 5223 5224 5225

		my_error(ER_TOO_BIG_ROWSIZE, MYF(0), max_row_size);
	}
}

vasil's avatar
vasil committed
5226 5227 5228 5229 5230 5231
/* 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))

osku's avatar
osku committed
5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249
/*********************************************************************
Creates a table definition to an InnoDB database. */
static
int
create_table_def(
/*=============*/
	trx_t*		trx,		/* in: InnoDB transaction handle */
	TABLE*		form,		/* in: information on table
					columns and indexes */
	const char*	table_name,	/* in: table name */
	const char*	path_of_temp_table,/* in: if this is a table explicitly
					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 */
5250
	ulint		flags)		/* in: table flags */
osku's avatar
osku committed
5251 5252 5253 5254
{
	Field*		field;
	dict_table_t*	table;
	ulint		n_cols;
5255 5256
	int		error;
	ulint		col_type;
osku's avatar
osku committed
5257
	ulint		col_len;
5258
	ulint		nulls_allowed;
osku's avatar
osku committed
5259 5260 5261 5262
	ulint		unsigned_type;
	ulint		binary_type;
	ulint		long_true_varchar;
	ulint		charset_no;
5263
	ulint		i;
osku's avatar
osku committed
5264

5265 5266
	DBUG_ENTER("create_table_def");
	DBUG_PRINT("enter", ("table_name: %s", table_name));
osku's avatar
osku committed
5267

vasil's avatar
vasil committed
5268 5269 5270 5271 5272 5273
	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
5274 5275 5276 5277 5278
	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 */

5279
	table = dict_mem_table_create(table_name, 0, n_cols, flags);
osku's avatar
osku committed
5280 5281 5282 5283 5284 5285 5286 5287 5288 5289

	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,
5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305
							     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
5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317
		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;
		}

5318
		charset_no = 0;
osku's avatar
osku committed
5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336

		if (dtype_is_string_type(col_type)) {

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

			ut_a(charset_no < 256); /* in data0type.h we assume
						that the number fits in one
						byte */
		}

		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. */
5337

osku's avatar
osku committed
5338 5339 5340 5341 5342 5343 5344 5345 5346 5347
		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;
			}
		}

5348 5349 5350 5351 5352
		/* First check whether the column to be added has a
		system reserved name. */
		if (dict_col_name_is_reserved(field->field_name)){
			push_warning_printf(
				(THD*) trx->mysql_thd,
5353
				MYSQL_ERROR::WARN_LEVEL_WARN,
5354 5355 5356 5357 5358 5359 5360 5361
				ER_CANT_CREATE_TABLE,
				"Error creating table '%s' with "
				"column name '%s'. '%s' is a "
				"reserved name. Please try to "
				"re-create the table with a "
				"different column name.",
				table->name, (char*) field->field_name,
				(char*) field->field_name);
5362
err_col:
5363 5364 5365 5366 5367 5368 5369
			dict_mem_table_free(table);
			trx_commit_for_mysql(trx);

			error = DB_ERROR;
			goto error_ret;
		}

5370
		dict_mem_table_add_col(table, table->heap,
5371 5372 5373 5374 5375 5376 5377
			(char*) field->field_name,
			col_type,
			dtype_form_prtype(
				(ulint)field->type()
				| nulls_allowed | unsigned_type
				| binary_type | long_true_varchar,
				charset_no),
5378
			col_len);
osku's avatar
osku committed
5379 5380 5381 5382
	}

	error = row_create_table_for_mysql(table, trx);

5383
	innodb_check_for_record_too_big_error(flags & DICT_TF_COMPACT, error);
5384

5385
error_ret:
osku's avatar
osku committed
5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404
	error = convert_error_code_to_mysql(error, NULL);

	DBUG_RETURN(error);
}

/*********************************************************************
Creates an index in an InnoDB database. */
static
int
create_index(
/*=========*/
	trx_t*		trx,		/* in: InnoDB transaction handle */
	TABLE*		form,		/* in: information on table
					columns and indexes */
	const char*	table_name,	/* in: table name */
	uint		key_num)	/* in: index number */
{
	Field*		field;
	dict_index_t*	index;
5405
	int		error;
osku's avatar
osku committed
5406 5407 5408 5409 5410 5411 5412
	ulint		n_fields;
	KEY*		key;
	KEY_PART_INFO*	key_part;
	ulint		ind_type;
	ulint		col_type;
	ulint		prefix_len;
	ulint		is_unsigned;
5413 5414
	ulint		i;
	ulint		j;
osku's avatar
osku committed
5415
	ulint*		field_lengths;
5416 5417

	DBUG_ENTER("create_index");
osku's avatar
osku committed
5418 5419 5420

	key = form->key_info + key_num;

5421
	n_fields = key->key_parts;
osku's avatar
osku committed
5422

5423 5424 5425
	/* Assert that "GEN_CLUST_INDEX" cannot be used as non-primary index */
	ut_a(innobase_strcasecmp(key->name, innobase_index_reserve_name) != 0);

5426
	ind_type = 0;
osku's avatar
osku committed
5427

5428
	if (key_num == form->s->primary_key) {
osku's avatar
osku committed
5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443
		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 */

	index = dict_mem_index_create((char*) table_name, key->name, 0,
						ind_type, n_fields);

	field_lengths = (ulint*) my_malloc(sizeof(ulint) * n_fields,
		MYF(MY_FAE));
5444

osku's avatar
osku committed
5445 5446 5447 5448 5449 5450 5451 5452
	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. */
5453

osku's avatar
osku committed
5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473
		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
5474 5475 5476 5477 5478
			|| (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
5479

5480
			prefix_len = key_part->length;
osku's avatar
osku committed
5481 5482

			if (col_type == DATA_INT
5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494
				|| 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
5495 5496
			}
		} else {
5497
			prefix_len = 0;
osku's avatar
osku committed
5498 5499 5500 5501 5502
		}

		field_lengths[i] = key_part->length;

		dict_mem_index_add_field(index,
5503
			(char*) key_part->field->field_name, prefix_len);
osku's avatar
osku committed
5504 5505
	}

5506 5507 5508
	/* 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
5509 5510
	error = row_create_index_for_mysql(index, trx, field_lengths);

5511 5512
	innodb_check_for_record_too_big_error(form->s->row_type
					      != ROW_TYPE_REDUNDANT, error);
5513

osku's avatar
osku committed
5514 5515
	error = convert_error_code_to_mysql(error, NULL);

marko's avatar
marko committed
5516
	my_free(field_lengths, MYF(0));
5517

osku's avatar
osku committed
5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528
	DBUG_RETURN(error);
}

/*********************************************************************
Creates an index to an InnoDB table when the user has defined no
primary index. */
static
int
create_clustered_index_when_no_primary(
/*===================================*/
	trx_t*		trx,		/* in: InnoDB transaction handle */
5529 5530
	ulint		comp,		/* in: ROW_FORMAT:
					nonzero=COMPACT, 0=REDUNDANT */
osku's avatar
osku committed
5531 5532 5533
	const char*	table_name)	/* in: table name */
{
	dict_index_t*	index;
5534
	int		error;
osku's avatar
osku committed
5535 5536 5537

	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
5538 5539
	index = dict_mem_index_create(table_name,
				      innobase_index_reserve_name,
5540
				      0, DICT_CLUSTERED, 0);
osku's avatar
osku committed
5541 5542
	error = row_create_index_for_mysql(index, trx, NULL);

5543
	innodb_check_for_record_too_big_error(comp, error);
5544

osku's avatar
osku committed
5545 5546 5547 5548 5549 5550
	error = convert_error_code_to_mysql(error, NULL);

	return(error);
}

/*********************************************************************
5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564
Update create_info.  Used in SHOW CREATE TABLE et al. */

void
ha_innobase::update_create_info(
/*============================*/
	HA_CREATE_INFO* create_info)	/* in/out: create info */
{
  if (!(create_info->used_fields & HA_CREATE_USED_AUTO)) {
    ha_innobase::info(HA_STATUS_AUTO);
    create_info->auto_increment_value = stats.auto_increment_value;
  }
}

/*********************************************************************
osku's avatar
osku committed
5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585
Creates a new table to an InnoDB database. */

int
ha_innobase::create(
/*================*/
					/* out: error number */
	const char*	name,		/* in: table name */
	TABLE*		form,		/* in: information on table
					columns and indexes */
	HA_CREATE_INFO*	create_info)	/* in: more information of the
					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];
5586
	THD*		thd = ha_thd();
5587
	ib_longlong	auto_inc_value;
5588
	ulint		flags;
osku's avatar
osku committed
5589

5590
	DBUG_ENTER("ha_innobase::create");
osku's avatar
osku committed
5591 5592

	DBUG_ASSERT(thd != NULL);
calvin's avatar
calvin committed
5593 5594 5595 5596 5597 5598 5599
	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

5600 5601
	When srv_file_per_table is on and mysqld_embedded is off,
	check for full path pattern, i.e.
calvin's avatar
calvin committed
5602 5603 5604 5605 5606 5607
	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
5608
	    && !mysqld_embedded
calvin's avatar
calvin committed
5609 5610 5611 5612 5613 5614 5615 5616 5617
	    && (!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
5618 5619 5620 5621 5622

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

5623 5624
		DBUG_RETURN(HA_ERR_TO_BIG_ROW);
	}
osku's avatar
osku committed
5625 5626 5627

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
5628

5629
	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
5630 5631 5632 5633

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

5634 5635
	trx_search_latch_release_if_reserved(parent_trx);

osku's avatar
osku committed
5636
	trx = trx_allocate_for_mysql();
5637

osku's avatar
osku committed
5638
	trx->mysql_thd = thd;
5639
	INNOBASE_COPY_STMT(thd, trx);
osku's avatar
osku committed
5640

5641
	if (thd_test_options(thd, OPTION_NO_FOREIGN_KEY_CHECKS)) {
osku's avatar
osku committed
5642 5643 5644
		trx->check_foreigns = FALSE;
	}

5645
	if (thd_test_options(thd, OPTION_RELAXED_UNIQUE_CHECKS)) {
osku's avatar
osku committed
5646 5647 5648 5649 5650 5651 5652 5653 5654
		trx->check_unique_secondary = FALSE;
	}

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

5655
	strcpy(name2, name);
osku's avatar
osku committed
5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666

	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 */

5667 5668 5669 5670 5671 5672
	flags = 0;

	if (form->s->row_type != ROW_TYPE_REDUNDANT) {
		flags |= DICT_TF_COMPACT;
	}

osku's avatar
osku committed
5673 5674
	/* Look for a primary key */

osku's avatar
osku committed
5675
	primary_key_no= (form->s->primary_key != MAX_KEY ?
5676
			 (int) form->s->primary_key :
osku's avatar
osku committed
5677 5678 5679 5680 5681 5682 5683
			 -1);

	/* Our function row_get_mysql_key_number_for_index assumes
	the primary key is always number 0, if it exists */

	DBUG_ASSERT(primary_key_no == -1 || primary_key_no == 0);

5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699
	/* Check for name conflicts (with reserved name) for
	any user indices to be created. */
	if (innobase_index_name_is_reserved(trx, form, norm_name)) {
		error = -1;
		goto cleanup;
	}

	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
5700 5701 5702 5703 5704 5705 5706
	/* 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 */

5707 5708 5709
		error = create_clustered_index_when_no_primary(
			trx, form->s->row_type != ROW_TYPE_REDUNDANT,
			norm_name);
5710
		if (error) {
osku's avatar
osku committed
5711
			goto cleanup;
5712
		}
osku's avatar
osku committed
5713 5714 5715 5716 5717
	}

	if (primary_key_no != -1) {
		/* In InnoDB the clustered index must always be created
		first */
5718
		if ((error = create_index(trx, form, norm_name,
osku's avatar
osku committed
5719 5720
					  (uint) primary_key_no))) {
			goto cleanup;
5721 5722
		}
	}
osku's avatar
osku committed
5723 5724 5725 5726 5727

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

		if (i != (uint) primary_key_no) {

5728
			if ((error = create_index(trx, form, norm_name, i))) {
osku's avatar
osku committed
5729
				goto cleanup;
5730 5731 5732
			}
		}
	}
osku's avatar
osku committed
5733

5734
	if (*trx->mysql_query_str) {
5735 5736 5737 5738
		error = row_table_add_foreign_constraints(
			trx,
			*trx->mysql_query_str, *trx->mysql_query_len,
			norm_name,
osku's avatar
osku committed
5739 5740 5741 5742 5743 5744 5745 5746 5747
			create_info->options & HA_LEX_CREATE_TMP_TABLE);

		error = convert_error_code_to_mysql(error, NULL);

		if (error) {
			goto cleanup;
		}
	}

5748
	innobase_commit_low(trx);
osku's avatar
osku committed
5749 5750 5751 5752 5753 5754 5755 5756 5757

	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();

5758
	innobase_table = dict_table_get(norm_name, FALSE);
osku's avatar
osku committed
5759 5760 5761

	DBUG_ASSERT(innobase_table != 0);

5762 5763 5764 5765
	/* 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
5766 5767
	this is an ALTER TABLE or CREATE INDEX because CREATE INDEX
	does a table copy too. */
5768 5769

	if (((create_info->used_fields & HA_CREATE_USED_AUTO)
5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781
	    || 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
5782 5783

		auto_inc_value = create_info->auto_increment_value;
5784 5785

		dict_table_autoinc_lock(innobase_table);
osku's avatar
osku committed
5786
		dict_table_autoinc_initialize(innobase_table, auto_inc_value);
5787
		dict_table_autoinc_unlock(innobase_table);
osku's avatar
osku committed
5788 5789 5790 5791 5792 5793 5794
	}

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

	srv_active_wake_master_thread();

5795
	trx_free_for_mysql(trx);
osku's avatar
osku committed
5796 5797 5798 5799 5800

	DBUG_RETURN(0);

cleanup:
	innobase_commit_low(trx);
5801

osku's avatar
osku committed
5802
	row_mysql_unlock_data_dictionary(trx);
5803

osku's avatar
osku committed
5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821
	trx_free_for_mysql(trx);

	DBUG_RETURN(error);
}

/*********************************************************************
Discards or imports an InnoDB tablespace. */

int
ha_innobase::discard_or_import_tablespace(
/*======================================*/
				/* out: 0 == success, -1 == error */
	my_bool discard)	/* in: TRUE if discard, else import */
{
	dict_table_t*	dict_table;
	trx_t*		trx;
	int		err;

5822
	DBUG_ENTER("ha_innobase::discard_or_import_tablespace");
osku's avatar
osku committed
5823

5824 5825
	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
5826
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
osku's avatar
osku committed
5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853

	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);
	}

	err = convert_error_code_to_mysql(err, NULL);

	DBUG_RETURN(err);
}

/*********************************************************************
Deletes all rows of an InnoDB table. */

int
ha_innobase::delete_all_rows(void)
/*==============================*/
				/* out: error number */
{
	int		error;

	DBUG_ENTER("ha_innobase::delete_all_rows");

5854 5855 5856 5857 5858 5859
	/* Get the transaction associated with the current thd, or create one
	if not yet created, and update prebuilt->trx */

	update_thd(ha_thd());

	if (thd_sql_command(user_thd) != SQLCOM_TRUNCATE) {
osku's avatar
osku committed
5860 5861
	fallback:
		/* We only handle TRUNCATE TABLE t as a special case.
5862 5863
		DELETE FROM t will have to use ha_innobase::delete_row(),
		because DELETE is transactional while TRUNCATE is not. */
osku's avatar
osku committed
5864 5865 5866 5867 5868
		DBUG_RETURN(my_errno=HA_ERR_WRONG_COMMAND);
	}

	/* Truncate the table in InnoDB */

5869
	error = row_truncate_table_for_mysql(prebuilt->table, prebuilt->trx);
osku's avatar
osku committed
5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896
	if (error == DB_ERROR) {
		/* Cannot truncate; resort to ha_innobase::delete_row() */
		goto fallback;
	}

	error = convert_error_code_to_mysql(error, NULL);

	DBUG_RETURN(error);
}

/*********************************************************************
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
inside InnoDB. */

int
ha_innobase::delete_table(
/*======================*/
				/* out: error number */
	const char*	name)	/* in: table name */
{
	ulint	name_len;
	int	error;
	trx_t*	parent_trx;
	trx_t*	trx;
5897
	THD	*thd = ha_thd();
osku's avatar
osku committed
5898 5899
	char	norm_name[1000];

5900
	DBUG_ENTER("ha_innobase::delete_table");
osku's avatar
osku committed
5901

vasil's avatar
vasil committed
5902 5903 5904 5905 5906 5907 5908 5909
	/* 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
5910 5911
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
5912

5913
	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
5914 5915 5916 5917

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

5918
	trx_search_latch_release_if_reserved(parent_trx);
osku's avatar
osku committed
5919 5920 5921 5922 5923 5924 5925 5926 5927

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

	trx = trx_allocate_for_mysql();

5928
	trx->mysql_thd = thd;
5929
	INNOBASE_COPY_STMT(thd, trx);
osku's avatar
osku committed
5930

5931
	if (thd_test_options(thd, OPTION_NO_FOREIGN_KEY_CHECKS)) {
osku's avatar
osku committed
5932 5933 5934
		trx->check_foreigns = FALSE;
	}

5935
	if (thd_test_options(thd, OPTION_RELAXED_UNIQUE_CHECKS)) {
osku's avatar
osku committed
5936 5937 5938 5939 5940 5941 5942
		trx->check_unique_secondary = FALSE;
	}

	name_len = strlen(name);

	assert(name_len < 1000);

5943
	/* Drop the table in InnoDB */
osku's avatar
osku committed
5944 5945

	error = row_drop_table_for_mysql(norm_name, trx,
5946 5947
					 thd_sql_command(thd)
					 == SQLCOM_DROP_DB);
osku's avatar
osku committed
5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959

	/* 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();

5960
	innobase_commit_low(trx);
osku's avatar
osku committed
5961

5962
	trx_free_for_mysql(trx);
osku's avatar
osku committed
5963 5964 5965 5966 5967 5968 5969 5970

	error = convert_error_code_to_mysql(error, NULL);

	DBUG_RETURN(error);
}

/*********************************************************************
Removes all tables in the named database inside InnoDB. */
5971
static
osku's avatar
osku committed
5972
void
osku's avatar
osku committed
5973 5974 5975
innobase_drop_database(
/*===================*/
			/* out: error number */
5976
        handlerton *hton, /* in: handlerton of Innodb */
osku's avatar
osku committed
5977 5978 5979 5980 5981 5982 5983 5984 5985 5986
	char*	path)	/* in: database path; inside InnoDB the name
			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*	parent_trx;
	trx_t*	trx;
	char*	ptr;
	char*	namebuf;
5987
	THD*	thd		= current_thd;
osku's avatar
osku committed
5988 5989 5990

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
5991

5992
	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
5993 5994 5995 5996

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

5997
	trx_search_latch_release_if_reserved(parent_trx);
osku's avatar
osku committed
5998 5999 6000 6001 6002 6003 6004 6005 6006

	ptr = strend(path) - 2;

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

	ptr++;
marko's avatar
marko committed
6007
	namebuf = (char*) my_malloc((uint) len + 2, MYF(0));
osku's avatar
osku committed
6008 6009 6010 6011

	memcpy(namebuf, ptr, len);
	namebuf[len] = '/';
	namebuf[len + 1] = '\0';
6012
#ifdef	__WIN__
osku's avatar
osku committed
6013 6014 6015
	innobase_casedn_str(namebuf);
#endif
	trx = trx_allocate_for_mysql();
6016
	trx->mysql_thd = thd;
6017
	INNOBASE_COPY_STMT(thd, trx);
osku's avatar
osku committed
6018

6019
	if (thd_test_options(thd, OPTION_NO_FOREIGN_KEY_CHECKS)) {
osku's avatar
osku committed
6020 6021 6022
		trx->check_foreigns = FALSE;
	}

6023
	row_drop_database_for_mysql(namebuf, trx);
osku's avatar
osku committed
6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036
	my_free(namebuf, MYF(0));

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

	log_buffer_flush_to_disk();

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

	srv_active_wake_master_thread();

6037 6038
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
osku's avatar
osku committed
6039
	return;
osku's avatar
osku committed
6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058
}

/*************************************************************************
Renames an InnoDB table. */

int
ha_innobase::rename_table(
/*======================*/
				/* out: 0 or error code */
	const char*	from,	/* in: old name of the table */
	const char*	to)	/* in: new name of the table */
{
	ulint	name_len1;
	ulint	name_len2;
	int	error;
	trx_t*	parent_trx;
	trx_t*	trx;
	char	norm_from[1000];
	char	norm_to[1000];
6059
	THD*	thd		= ha_thd();
osku's avatar
osku committed
6060

6061
	DBUG_ENTER("ha_innobase::rename_table");
osku's avatar
osku committed
6062 6063 6064

	/* Get the transaction associated with the current thd, or create one
	if not yet created */
6065

6066
	parent_trx = check_trx_exists(thd);
osku's avatar
osku committed
6067 6068 6069 6070

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

6071
	trx_search_latch_release_if_reserved(parent_trx);
osku's avatar
osku committed
6072 6073 6074 6075 6076 6077 6078 6079

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

	trx = trx_allocate_for_mysql();
6080
	trx->mysql_thd = thd;
6081
	INNOBASE_COPY_STMT(thd, trx);
osku's avatar
osku committed
6082

6083
	if (thd_test_options(thd, OPTION_NO_FOREIGN_KEY_CHECKS)) {
osku's avatar
osku committed
6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095
		trx->check_foreigns = FALSE;
	}

	name_len1 = strlen(from);
	name_len2 = strlen(to);

	assert(name_len1 < 1000);
	assert(name_len2 < 1000);

	normalize_table_name(norm_from, from);
	normalize_table_name(norm_to, to);

6096
	/* Rename the table in InnoDB */
osku's avatar
osku committed
6097

6098
	error = row_rename_table_for_mysql(norm_from, norm_to, trx);
osku's avatar
osku committed
6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110

	/* 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();

6111 6112
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
osku's avatar
osku committed
6113

6114 6115
	switch (error) {
	case DB_DUPLICATE_KEY:
6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130
	/* 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. */
		my_error(ER_TABLE_EXISTS_ERROR, MYF(0), to);

		error = DB_ERROR;
6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149
		break;
	case DB_FOREIGN_NO_INDEX:
		push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				    HA_ERR_CANNOT_ADD_FOREIGN,
				    "Alter or rename of table '%s' failed"
				    " because the new table is a child table"
				    " in a FK relationship and it does not"
				    " have an index that contains foreign"
				    " keys as its prefix columns.", norm_to);
		break;
	case DB_REFERENCING_NO_INDEX:
		push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
				    HA_ERR_CANNOT_ADD_FOREIGN,
				    "Alter or rename of table '%s' failed"
				    " because the new table is a parent table"
				    " in a FK relationship and it does not"
				    " have an index that contains foreign"
				    " keys as its prefix columns.", norm_to);
		break;
6150 6151
	}

osku's avatar
osku committed
6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164
	error = convert_error_code_to_mysql(error, NULL);

	DBUG_RETURN(error);
}

/*************************************************************************
Estimates the number of index records in a range. */

ha_rows
ha_innobase::records_in_range(
/*==========================*/
						/* out: estimated number of
						rows */
6165 6166 6167
	uint			keynr,		/* in: index number */
	key_range		*min_key,	/* in: start key value of the
						   range, may also be 0 */
osku's avatar
osku committed
6168
	key_range		*max_key)	/* in: range end key val, may
6169
						   also be 0 */
osku's avatar
osku committed
6170 6171 6172
{
	KEY*		key;
	dict_index_t*	index;
6173
	uchar*		key_val_buff2	= (uchar*) my_malloc(
osku's avatar
osku committed
6174
						  table->s->reclength
6175
					+ table->s->max_key_length + 100,
osku's avatar
osku committed
6176 6177
								MYF(MY_FAE));
	ulint		buff2_len = table->s->reclength
6178
					+ table->s->max_key_length + 100;
osku's avatar
osku committed
6179 6180 6181 6182 6183
	dtuple_t*	range_start;
	dtuple_t*	range_end;
	ib_longlong	n_rows;
	ulint		mode1;
	ulint		mode2;
6184 6185
	void*		heap1;
	void*		heap2;
osku's avatar
osku committed
6186

6187
	DBUG_ENTER("records_in_range");
osku's avatar
osku committed
6188

6189
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
6190

osku's avatar
osku committed
6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204
	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;

	index = dict_table_get_index_noninline(prebuilt->table, key->name);

	range_start = dtuple_create_for_mysql(&heap1, key->key_parts);
6205
	dict_index_copy_types(range_start, index, key->key_parts);
osku's avatar
osku committed
6206 6207

	range_end = dtuple_create_for_mysql(&heap2, key->key_parts);
6208
	dict_index_copy_types(range_end, index, key->key_parts);
osku's avatar
osku committed
6209 6210 6211 6212 6213 6214

	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 :
6215
					 (const uchar*) 0),
osku's avatar
osku committed
6216 6217 6218 6219 6220 6221 6222
				(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 :
6223
					 (const uchar*) 0),
osku's avatar
osku committed
6224 6225 6226 6227
				(ulint) (max_key ? max_key->length : 0),
				prebuilt->trx);

	mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag :
6228
						HA_READ_KEY_EXACT);
osku's avatar
osku committed
6229
	mode2 = convert_search_mode_to_innobase(max_key ? max_key->flag :
6230
						HA_READ_KEY_EXACT);
osku's avatar
osku committed
6231

6232 6233 6234 6235 6236 6237 6238
	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 {

vasil's avatar
vasil committed
6239
		n_rows = HA_POS_ERROR;
6240 6241
	}

osku's avatar
osku committed
6242 6243 6244
	dtuple_free_for_mysql(heap1);
	dtuple_free_for_mysql(heap2);

marko's avatar
marko committed
6245
	my_free(key_val_buff2, MYF(0));
osku's avatar
osku committed
6246 6247 6248 6249 6250 6251 6252 6253 6254 6255

	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) {
6256
		n_rows = 1;
osku's avatar
osku committed
6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274
	}

	DBUG_RETURN((ha_rows) n_rows);
}

/*************************************************************************
Gives an UPPER BOUND to the number of rows in a table. This is used in
filesort.cc. */

ha_rows
ha_innobase::estimate_rows_upper_bound(void)
/*======================================*/
			/* out: upper bound of rows */
{
	dict_index_t*	index;
	ulonglong	estimate;
	ulonglong	local_data_file_length;

6275
	DBUG_ENTER("estimate_rows_upper_bound");
osku's avatar
osku committed
6276 6277 6278 6279 6280

	/* 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. */

6281
	update_thd(ha_thd());
osku's avatar
osku committed
6282 6283

	prebuilt->trx->op_info = (char*)
6284
				 "calculating upper bound for table rows";
osku's avatar
osku committed
6285 6286 6287 6288 6289 6290 6291 6292 6293

	/* 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);

	index = dict_table_get_first_index_noninline(prebuilt->table);

	local_data_file_length = ((ulonglong) index->stat_n_leaf_pages)
6294
							* UNIV_PAGE_SIZE;
osku's avatar
osku committed
6295 6296 6297 6298 6299 6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322

	/* 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);
}

/*************************************************************************
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
decide if we should scan the table or use keys. */

double
ha_innobase::scan_time()
/*====================*/
			/* out: estimated time measured in disk seeks */
{
	/* 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. */
6323

osku's avatar
osku committed
6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334
	return((double) (prebuilt->table->stat_clustered_index_size));
}

/**********************************************************************
Calculate the time it takes to read a set of ranges through an index
This enables us to optimise reads for clustered indexes. */

double
ha_innobase::read_time(
/*===================*/
			/* out: estimated time measured in disk seeks */
6335
	uint	index,	/* in: key number */
osku's avatar
osku committed
6336 6337 6338 6339
	uint	ranges,	/* in: how many ranges */
	ha_rows rows)	/* in: estimated number of rows in the ranges */
{
	ha_rows total_rows;
6340 6341
	double	time_for_scan;

osku's avatar
osku committed
6342
	if (index != table->s->primary_key) {
6343 6344
		/* Not clustered */
		return(handler::read_time(index, ranges, rows));
osku's avatar
osku committed
6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358
	}

	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) {

6359
		return(time_for_scan);
osku's avatar
osku committed
6360 6361 6362 6363 6364 6365 6366 6367 6368
	}

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

/*************************************************************************
Returns statistics information of the table to the MySQL interpreter,
in various fields of the handle object. */

6369
int
osku's avatar
osku committed
6370 6371 6372 6373 6374 6375 6376 6377 6378
ha_innobase::info(
/*==============*/
	uint flag)	/* in: what information MySQL requests */
{
	dict_table_t*	ib_table;
	dict_index_t*	index;
	ha_rows		rec_per_key;
	ib_longlong	n_rows;
	char		path[FN_REFLEN];
6379
	os_file_stat_t	stat_info;
osku's avatar
osku committed
6380

6381
	DBUG_ENTER("info");
osku's avatar
osku committed
6382

6383
	/* If we are forcing recovery at a high level, we will suppress
osku's avatar
osku committed
6384 6385 6386 6387 6388 6389 6390
	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. */

6391
	update_thd(ha_thd());
osku's avatar
osku committed
6392 6393 6394 6395 6396 6397 6398 6399

	/* 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);

6400
	ib_table = prebuilt->table;
osku's avatar
osku committed
6401

6402
	if (flag & HA_STATUS_TIME) {
vasil's avatar
vasil committed
6403
		if (innobase_stats_on_metadata) {
6404 6405
			/* In sql_show we call with this flag: update
			then statistics so that they are up-to-date */
osku's avatar
osku committed
6406

6407
			prebuilt->trx->op_info = "updating table statistics";
osku's avatar
osku committed
6408

marko's avatar
marko committed
6409
			dict_update_statistics(ib_table);
osku's avatar
osku committed
6410

6411
			prebuilt->trx->op_info = "returning various info to MySQL";
marko's avatar
marko committed
6412
		}
osku's avatar
osku committed
6413

6414
		my_snprintf(path, sizeof(path), "%s/%s%s",
6415 6416
				mysql_data_home, ib_table->name, reg_ext);

6417
		unpack_filename(path,path);
osku's avatar
osku committed
6418

6419
		/* Note that we do not know the access time of the table,
osku's avatar
osku committed
6420 6421 6422
		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */

		if (os_file_get_status(path,&stat_info)) {
vasil's avatar
vasil committed
6423
			stats.create_time = (ulong) stat_info.ctime;
osku's avatar
osku committed
6424
		}
6425
	}
osku's avatar
osku committed
6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450

	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++;
		}

6451 6452 6453 6454
		/* 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. */
6455 6456
		if (thd_sql_command(user_thd) == SQLCOM_TRUNCATE) {

6457
			n_rows = 1;
6458 6459 6460 6461 6462 6463 6464

			/* 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. */

6465
			prebuilt->autoinc_last_value = 0;
6466 6467
		}

marko's avatar
marko committed
6468 6469 6470
		stats.records = (ha_rows)n_rows;
		stats.deleted = 0;
		stats.data_file_length = ((ulonglong)
osku's avatar
osku committed
6471
				ib_table->stat_clustered_index_size)
6472
					* UNIV_PAGE_SIZE;
marko's avatar
marko committed
6473
		stats.index_file_length = ((ulonglong)
osku's avatar
osku committed
6474
				ib_table->stat_sum_of_other_index_sizes)
6475
					* UNIV_PAGE_SIZE;
vasil's avatar
vasil committed
6476 6477 6478 6479 6480

		/* 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.
6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492
		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 {
6493
			ullint	avail_space;
vasil's avatar
vasil committed
6494

6495 6496
			avail_space = fsp_get_available_space_in_free_extents(
					ib_table->space);
vasil's avatar
vasil committed
6497

6498
			if (avail_space == ULLINT_UNDEFINED) {
vasil's avatar
vasil committed
6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513
				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);

vasil's avatar
vasil committed
6514
				stats.delete_length = 0;
6515 6516
			} else {
				stats.delete_length = avail_space * 1024;
vasil's avatar
vasil committed
6517
			}
vasil's avatar
vasil committed
6518 6519
		}

marko's avatar
marko committed
6520
		stats.check_time = 0;
osku's avatar
osku committed
6521

marko's avatar
marko committed
6522 6523
		if (stats.records == 0) {
			stats.mean_rec_length = 0;
6524
		} else {
marko's avatar
marko committed
6525
			stats.mean_rec_length = (ulong) (stats.data_file_length / stats.records);
6526 6527
		}
	}
osku's avatar
osku committed
6528 6529

	if (flag & HA_STATUS_CONST) {
6530
		ulong	i = 0;
osku's avatar
osku committed
6531 6532 6533 6534 6535 6536 6537
		index = dict_table_get_first_index_noninline(ib_table);

		if (prebuilt->clust_index_was_generated) {
			index = dict_table_get_next_index_noninline(index);
		}

		for (i = 0; i < table->s->keys; i++) {
6538 6539
			ulong	j;

osku's avatar
osku committed
6540
			if (index == NULL) {
6541
				sql_print_error("Table %s contains fewer "
osku's avatar
osku committed
6542 6543 6544 6545
						"indexes inside InnoDB than "
						"are defined in the MySQL "
						".frm file. Have you mixed up "
						".frm files from different "
6546 6547 6548
						"installations? See "
"http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html\n",

osku's avatar
osku committed
6549 6550 6551 6552 6553 6554 6555
						ib_table->name);
				break;
			}

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

				if (j + 1 > index->n_uniq) {
6556 6557 6558 6559 6560
					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? "
"See http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html\n",
osku's avatar
osku committed
6561 6562 6563 6564
							index->name,
							ib_table->name,
							(unsigned long)
							index->n_uniq, j + 1);
6565
					break;
osku's avatar
osku committed
6566 6567 6568 6569
				}

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

marko's avatar
marko committed
6570
					rec_per_key = stats.records;
osku's avatar
osku committed
6571
				} else {
marko's avatar
marko committed
6572
					rec_per_key = (ha_rows)(stats.records /
6573
					 index->stat_n_diff_key_vals[j + 1]);
osku's avatar
osku committed
6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586
				}

				/* 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;
				}

6587
				table->key_info[i].rec_per_key[j]=
osku's avatar
osku committed
6588
				  rec_per_key >= ~(ulong) 0 ? ~(ulong) 0 :
marko's avatar
marko committed
6589
				  (ulong) rec_per_key;
osku's avatar
osku committed
6590 6591 6592 6593 6594 6595
			}

			index = dict_table_get_next_index_noninline(index);
		}
	}

6596 6597 6598 6599 6600
	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {

		goto func_exit;
	}

6601
	if (flag & HA_STATUS_ERRKEY) {
6602 6603
		ut_a(prebuilt->trx);
		ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
osku's avatar
osku committed
6604 6605

		errkey = (unsigned int) row_get_mysql_key_number_for_index(
6606 6607
			(dict_index_t*) trx_get_error_info(prebuilt->trx));
	}
osku's avatar
osku committed
6608 6609

	if (flag & HA_STATUS_AUTO && table->found_next_number_field) {
6610
 		stats.auto_increment_value = innobase_peek_autoinc();
osku's avatar
osku committed
6611 6612
	}

6613
func_exit:
osku's avatar
osku committed
6614 6615
	prebuilt->trx->op_info = (char*)"";

6616
  	DBUG_RETURN(0);
osku's avatar
osku committed
6617 6618 6619 6620 6621 6622 6623 6624
}

/**************************************************************************
Updates index cardinalities of the table, based on 8 random dives into
each index tree. This does NOT calculate exact statistics on the table. */

int
ha_innobase::analyze(
6625
/*=================*/
osku's avatar
osku committed
6626 6627 6628 6629
					/* out: returns always 0 (success) */
	THD*		thd,		/* in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: currently ignored */
{
vasil's avatar
vasil committed
6630 6631 6632 6633
	/* Serialize ANALYZE TABLE inside InnoDB, see
	Bug#38996 Race condition in ANALYZE TABLE */
	pthread_mutex_lock(&analyze_mutex);

osku's avatar
osku committed
6634 6635 6636
	/* Simply call ::info() with all the flags */
	info(HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE);

vasil's avatar
vasil committed
6637 6638
	pthread_mutex_unlock(&analyze_mutex);

osku's avatar
osku committed
6639 6640 6641 6642
	return(0);
}

/**************************************************************************
6643
This is mapped to "ALTER TABLE tablename ENGINE=InnoDB", which rebuilds
osku's avatar
osku committed
6644 6645 6646 6647 6648 6649 6650 6651
the table in MySQL. */

int
ha_innobase::optimize(
/*==================*/
	THD*		thd,		/* in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: currently ignored */
{
6652
	return(HA_ADMIN_TRY_ALTER);
osku's avatar
osku committed
6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664
}

/***********************************************************************
Tries to check that an InnoDB table is not corrupted. If corruption is
noticed, prints to stderr information about it. In case of corruption
may also assert a failure and crash the server. */

int
ha_innobase::check(
/*===============*/
					/* out: HA_ADMIN_CORRUPT or
					HA_ADMIN_OK */
6665 6666
	THD*		thd,		/* in: user thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: check options, currently
osku's avatar
osku committed
6667 6668 6669 6670
					ignored */
{
	ulint		ret;

6671
	DBUG_ASSERT(thd == ha_thd());
6672 6673
	ut_a(prebuilt->trx);
	ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N);
6674
	ut_a(prebuilt->trx == thd_to_trx(thd));
osku's avatar
osku committed
6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688

	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);
	}

	ret = row_check_table_for_mysql(prebuilt);

	if (ret == DB_SUCCESS) {
		return(HA_ADMIN_OK);
	}

6689
	return(HA_ADMIN_CORRUPT);
osku's avatar
osku committed
6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701
}

/*****************************************************************
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
foreign keys. */

char*
ha_innobase::update_table_comment(
/*==============================*/
				/* out: table comment + InnoDB free space +
				info on foreign keys */
6702
	const char*	comment)/* in: table comment defined by user */
osku's avatar
osku committed
6703
{
osku's avatar
osku committed
6704 6705
	uint	length = (uint) strlen(comment);
	char*	str;
osku's avatar
osku committed
6706
	long	flen;
osku's avatar
osku committed
6707 6708 6709 6710 6711 6712 6713 6714 6715

	/* 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 */
	}

6716
	update_thd(ha_thd());
osku's avatar
osku committed
6717 6718 6719 6720 6721 6722 6723 6724 6725

	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;

osku's avatar
osku committed
6726
	/* output the data to a temporary file */
osku's avatar
osku committed
6727

osku's avatar
osku committed
6728 6729 6730
	mutex_enter_noninline(&srv_dict_tmpfile_mutex);
	rewind(srv_dict_tmpfile);

6731 6732 6733
	fprintf(srv_dict_tmpfile, "InnoDB free: %llu kB",
		fsp_get_available_space_in_free_extents(
			prebuilt->table->space));
osku's avatar
osku committed
6734

osku's avatar
osku committed
6735
	dict_print_info_on_foreign_keys(FALSE, srv_dict_tmpfile,
osku's avatar
osku committed
6736
				prebuilt->trx, prebuilt->table);
osku's avatar
osku committed
6737 6738 6739 6740 6741 6742
	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
6743

osku's avatar
osku committed
6744 6745
	/* allocate buffer for the full string, and
	read the contents of the temporary file */
osku's avatar
osku committed
6746

marko's avatar
marko committed
6747
	str = (char*) my_malloc(length + flen + 3, MYF(0));
osku's avatar
osku committed
6748

osku's avatar
osku committed
6749 6750 6751 6752 6753 6754
	if (str) {
		char* pos	= str + length;
		if (length) {
			memcpy(str, comment, length);
			*pos++ = ';';
			*pos++ = ' ';
osku's avatar
osku committed
6755
		}
osku's avatar
osku committed
6756 6757 6758
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(pos, 1, flen, srv_dict_tmpfile);
		pos[flen] = 0;
osku's avatar
osku committed
6759 6760
	}

osku's avatar
osku committed
6761 6762
	mutex_exit_noninline(&srv_dict_tmpfile_mutex);

6763
	prebuilt->trx->op_info = (char*)"";
osku's avatar
osku committed
6764

6765
	return(str ? str : (char*) comment);
osku's avatar
osku committed
6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778
}

/***********************************************************************
Gets the foreign key create info for a table stored in InnoDB. */

char*
ha_innobase::get_foreign_key_create_info(void)
/*==========================================*/
			/* out, own: character string in the form which
			can be inserted to the CREATE TABLE statement,
			MUST be freed with ::free_foreign_key_create_info */
{
	char*	str	= 0;
osku's avatar
osku committed
6779
	long	flen;
osku's avatar
osku committed
6780 6781 6782 6783 6784 6785 6786

	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. */

6787
	update_thd(ha_thd());
osku's avatar
osku committed
6788

osku's avatar
osku committed
6789
	prebuilt->trx->op_info = (char*)"getting info on foreign keys";
osku's avatar
osku committed
6790

osku's avatar
osku committed
6791 6792 6793
	/* 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
6794

osku's avatar
osku committed
6795
	trx_search_latch_release_if_reserved(prebuilt->trx);
osku's avatar
osku committed
6796

osku's avatar
osku committed
6797 6798
	mutex_enter_noninline(&srv_dict_tmpfile_mutex);
	rewind(srv_dict_tmpfile);
osku's avatar
osku committed
6799

osku's avatar
osku committed
6800 6801
	/* output the data to a temporary file */
	dict_print_info_on_foreign_keys(TRUE, srv_dict_tmpfile,
osku's avatar
osku committed
6802
				prebuilt->trx, prebuilt->table);
osku's avatar
osku committed
6803
	prebuilt->trx->op_info = (char*)"";
osku's avatar
osku committed
6804

osku's avatar
osku committed
6805 6806 6807 6808 6809 6810
	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	} else if (flen > 64000 - 1) {
		flen = 64000 - 1;
	}
osku's avatar
osku committed
6811

osku's avatar
osku committed
6812 6813
	/* allocate buffer for the string, and
	read the contents of the temporary file */
osku's avatar
osku committed
6814

marko's avatar
marko committed
6815
	str = (char*) my_malloc(flen + 1, MYF(0));
osku's avatar
osku committed
6816

osku's avatar
osku committed
6817 6818 6819 6820
	if (str) {
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(str, 1, flen, srv_dict_tmpfile);
		str[flen] = 0;
osku's avatar
osku committed
6821 6822
	}

osku's avatar
osku committed
6823 6824
	mutex_exit_noninline(&srv_dict_tmpfile_mutex);

6825
	return(str);
osku's avatar
osku committed
6826 6827 6828
}


6829
int
osku's avatar
osku committed
6830 6831 6832 6833 6834 6835
ha_innobase::get_foreign_key_list(THD *thd, List<FOREIGN_KEY_INFO> *f_key_list)
{
  dict_foreign_t* foreign;

  DBUG_ENTER("get_foreign_key_list");
  ut_a(prebuilt != NULL);
6836
  update_thd(ha_thd());
osku's avatar
osku committed
6837 6838 6839 6840 6841
  prebuilt->trx->op_info = (char*)"getting list of foreign keys";
  trx_search_latch_release_if_reserved(prebuilt->trx);
  mutex_enter_noninline(&(dict_sys->mutex));
  foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list);

6842 6843 6844 6845
  while (foreign != NULL) {
	  uint i;
	  FOREIGN_KEY_INFO f_key_info;
	  LEX_STRING *name= 0;
marko's avatar
marko committed
6846
          uint ulen;
marko's avatar
marko committed
6847 6848
          char uname[NAME_LEN+1];           /* Unencoded name */
          char db_name[NAME_LEN+1];
6849 6850 6851 6852 6853 6854 6855
	  const char *tmp_buff;

	  tmp_buff= foreign->id;
	  i= 0;
	  while (tmp_buff[i] != '/')
		  i++;
	  tmp_buff+= i + 1;
6856 6857
	  f_key_info.forein_id = thd_make_lex_string(thd, 0,
		  tmp_buff, (uint) strlen(tmp_buff), 1);
6858
	  tmp_buff= foreign->referenced_table_name;
marko's avatar
marko committed
6859 6860

          /* Database name */
6861 6862
	  i= 0;
	  while (tmp_buff[i] != '/')
marko's avatar
marko committed
6863 6864 6865 6866 6867 6868
          {
            db_name[i]= tmp_buff[i];
            i++;
          }
          db_name[i]= 0;
          ulen= filename_to_tablename(db_name, uname, sizeof(uname));
6869 6870
	  f_key_info.referenced_db = thd_make_lex_string(thd, 0,
		  uname, ulen, 1);
marko's avatar
marko committed
6871 6872

          /* Table name */
6873
	  tmp_buff+= i + 1;
marko's avatar
marko committed
6874
          ulen= filename_to_tablename(tmp_buff, uname, sizeof(uname));
6875 6876
	  f_key_info.referenced_table = thd_make_lex_string(thd, 0,
		  uname, ulen, 1);
6877 6878 6879

	  for (i= 0;;) {
		  tmp_buff= foreign->foreign_col_names[i];
6880 6881
		  name = thd_make_lex_string(thd, name,
			  tmp_buff, (uint) strlen(tmp_buff), 1);
6882 6883
		  f_key_info.foreign_fields.push_back(name);
		  tmp_buff= foreign->referenced_col_names[i];
6884 6885
		  name = thd_make_lex_string(thd, name,
			tmp_buff, (uint) strlen(tmp_buff), 1);
6886 6887 6888 6889 6890
		  f_key_info.referenced_fields.push_back(name);
		  if (++i >= foreign->n_fields)
			  break;
	  }

6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911
          ulong length;
          if (foreign->type & DICT_FOREIGN_ON_DELETE_CASCADE)
          {
            length=7;
            tmp_buff= "CASCADE";
          }	
          else if (foreign->type & DICT_FOREIGN_ON_DELETE_SET_NULL)
          {
            length=8;
            tmp_buff= "SET NULL";
          }
          else if (foreign->type & DICT_FOREIGN_ON_DELETE_NO_ACTION)
          {
            length=9;
            tmp_buff= "NO ACTION";
          }
          else
          {
            length=8;
            tmp_buff= "RESTRICT";
          }
6912 6913
	  f_key_info.delete_method = thd_make_lex_string(
		  thd, f_key_info.delete_method, tmp_buff, length, 1);
6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934 6935
 
 
          if (foreign->type & DICT_FOREIGN_ON_UPDATE_CASCADE)
          {
            length=7;
            tmp_buff= "CASCADE";
          }
          else if (foreign->type & DICT_FOREIGN_ON_UPDATE_SET_NULL)
          {
            length=8;
            tmp_buff= "SET NULL";
          }
          else if (foreign->type & DICT_FOREIGN_ON_UPDATE_NO_ACTION)
          {
            length=9;
            tmp_buff= "NO ACTION";
          }
          else
          {
            length=8;
            tmp_buff= "RESTRICT";
          }
6936 6937
	  f_key_info.update_method = thd_make_lex_string(
		  thd, f_key_info.update_method, tmp_buff, length, 1);
marko's avatar
marko committed
6938 6939 6940
          if (foreign->referenced_index &&
              foreign->referenced_index->name)
          {
6941 6942 6943
	    f_key_info.referenced_key_name = thd_make_lex_string(
		    thd, f_key_info.referenced_key_name,
		    foreign->referenced_index->name,
vasil's avatar
vasil committed
6944
		    (uint) strlen(foreign->referenced_index->name), 1);
marko's avatar
marko committed
6945
          }
vasil's avatar
vasil committed
6946 6947
          else
            f_key_info.referenced_key_name= 0;
6948

6949
	  FOREIGN_KEY_INFO *pf_key_info = (FOREIGN_KEY_INFO *)
6950
		  thd_memdup(thd, &f_key_info, sizeof(FOREIGN_KEY_INFO));
6951 6952
	  f_key_list->push_back(pf_key_info);
	  foreign = UT_LIST_GET_NEXT(foreign_list, foreign);
osku's avatar
osku committed
6953 6954 6955
  }
  mutex_exit_noninline(&(dict_sys->mutex));
  prebuilt->trx->op_info = (char*)"";
6956

osku's avatar
osku committed
6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970
  DBUG_RETURN(0);
}

/*********************************************************************
Checks if ALTER TABLE may change the storage engine of the table.
Changing storage engines is not allowed for tables for which there
are foreign key constraints (parent or child tables). */

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

6971
	DBUG_ENTER("ha_innobase::can_switch_engines");
6972

6973
	ut_a(prebuilt->trx == thd_to_trx(ha_thd()));
6974

osku's avatar
osku committed
6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013
	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);
}

/***********************************************************************
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
REPLACE, not an update. */

uint
ha_innobase::referenced_by_foreign_key(void)
/*========================================*/
			/* out: > 0 if referenced by a FOREIGN KEY */
{
	if (dict_table_referenced_by_foreign_key(prebuilt->table)) {

		return(1);
	}

	return(0);
}

/***********************************************************************
Frees the foreign key create info for a table stored in InnoDB, if it is
non-NULL. */

void
ha_innobase::free_foreign_key_create_info(
/*======================================*/
7014
	char*	str)	/* in, own: create info string to free	*/
osku's avatar
osku committed
7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027 7028
{
	if (str) {
		my_free(str, MYF(0));
	}
}

/***********************************************************************
Tells something additional to the handler about how to do things. */

int
ha_innobase::extra(
/*===============*/
			   /* out: 0 or error number */
	enum ha_extra_function operation)
marko's avatar
marko committed
7029
			   /* in: HA_EXTRA_FLUSH or some other flag */
osku's avatar
osku committed
7030 7031 7032 7033 7034 7035
{
	/* 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) {
7036 7037 7038 7039 7040 7041
		case HA_EXTRA_FLUSH:
			if (prebuilt->blob_heap) {
				row_mysql_prebuilt_free_blob_heap(prebuilt);
			}
			break;
		case HA_EXTRA_RESET_STATE:
7042
			reset_template(prebuilt);
7043
			break;
osku's avatar
osku committed
7044
		case HA_EXTRA_NO_KEYREAD:
7045 7046 7047 7048 7049
			prebuilt->read_just_key = 0;
			break;
		case HA_EXTRA_KEYREAD:
			prebuilt->read_just_key = 1;
			break;
osku's avatar
osku committed
7050 7051 7052
		case HA_EXTRA_KEYREAD_PRESERVE_FIELDS:
			prebuilt->keep_other_fields_on_keyread = 1;
			break;
7053 7054 7055 7056 7057 7058 7059

			/* 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! */
7060
		case HA_EXTRA_IGNORE_DUP_KEY:
7061
			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_IGNORE;
7062 7063
			break;
		case HA_EXTRA_WRITE_CAN_REPLACE:
7064
			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_REPLACE;
7065 7066
			break;
		case HA_EXTRA_WRITE_CANNOT_REPLACE:
7067
			thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_REPLACE;
7068 7069
			break;
		case HA_EXTRA_NO_IGNORE_DUP_KEY:
7070
			thd_to_trx(ha_thd())->duplicates &=
7071 7072
				~(TRX_DUP_IGNORE | TRX_DUP_REPLACE);
			break;
osku's avatar
osku committed
7073 7074 7075 7076 7077 7078 7079
		default:/* Do nothing */
			;
	}

	return(0);
}

7080 7081 7082 7083
/**********************************************************************
Reset state of file to after 'open'.
This function is called after every statement for all tables used
by that statement.  */
marko's avatar
marko committed
7084 7085
int ha_innobase::reset()
{
7086 7087 7088 7089 7090 7091 7092 7093 7094 7095
	if (prebuilt->blob_heap) {
		row_mysql_prebuilt_free_blob_heap(prebuilt);
	}

	reset_template(prebuilt);

	/* 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. */
7096
	prebuilt->autoinc_last_value = 0;
marko's avatar
marko committed
7097

7098 7099
	return(0);
}
marko's avatar
marko committed
7100

osku's avatar
osku committed
7101 7102 7103 7104 7105 7106 7107 7108 7109
/**********************************************************************
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
7110
locks (thd_in_lock_tables(thd) holds in store_lock()) before executing the
osku's avatar
osku committed
7111 7112 7113 7114 7115
procedure. */

int
ha_innobase::start_stmt(
/*====================*/
7116 7117 7118
				/* out: 0 or error code */
	THD*		thd,	/* in: handle to the user thread */
	thr_lock_type	lock_type)
osku's avatar
osku committed
7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134
{
	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);

sunny's avatar
sunny committed
7135 7136 7137
	/* Reset the AUTOINC statement level counter for multi-row INSERTs. */
	trx->n_autoinc_rows = 0;

osku's avatar
osku committed
7138 7139
	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;
7140
	reset_template(prebuilt);
osku's avatar
osku committed
7141 7142

	if (!prebuilt->mysql_has_locked) {
7143 7144 7145 7146 7147 7148
		/* 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;
osku's avatar
osku committed
7149 7150
	} else {
		if (trx->isolation_level != TRX_ISO_SERIALIZABLE
7151
			&& thd_sql_command(thd) == SQLCOM_SELECT
7152 7153
			&& lock_type == TL_READ) {

osku's avatar
osku committed
7154 7155 7156 7157 7158 7159 7160 7161 7162
			/* For other than temporary tables, we obtain
			no lock for consistent read (plain SELECT). */

			prebuilt->select_lock_type = LOCK_NONE;
		} else {
			/* Not a consistent read: restore the
			select_lock_type value. The value of
			stored_select_lock_type was decided in:
			1) ::store_lock(),
7163 7164
			2) ::external_lock(),
			3) ::init_table_handle_for_HANDLER(), and
7165
			4) ::transactional_table_lock(). */
osku's avatar
osku committed
7166 7167 7168 7169 7170 7171 7172 7173 7174

			prebuilt->select_lock_type =
				prebuilt->stored_select_lock_type;
		}
	}

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

	/* Set the MySQL flag to mark that there is an active transaction */
7175
	if (trx->active_trans == 0) {
osku's avatar
osku committed
7176

7177
		innobase_register_trx_and_stmt(ht, thd);
7178 7179
		trx->active_trans = 1;
	} else {
7180
		innobase_register_stmt(ht, thd);
osku's avatar
osku committed
7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200
	}

	return(0);
}

/**********************************************************************
Maps a MySQL trx isolation level code to the InnoDB isolation level code */
inline
ulint
innobase_map_isolation_level(
/*=========================*/
					/* out: InnoDB isolation level */
	enum_tx_isolation	iso)	/* in: MySQL isolation level code */
{
	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);
7201
	}
osku's avatar
osku committed
7202
}
7203

osku's avatar
osku committed
7204 7205 7206 7207 7208 7209 7210 7211 7212 7213 7214 7215
/**********************************************************************
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
the SQL statement in case of an error. */

int
ha_innobase::external_lock(
/*=======================*/
7216
				/* out: 0 */
osku's avatar
osku committed
7217
	THD*	thd,		/* in: handle to the user thread */
7218
	int	lock_type)	/* in: lock type */
osku's avatar
osku committed
7219 7220 7221
{
	trx_t*		trx;

7222
	DBUG_ENTER("ha_innobase::external_lock");
osku's avatar
osku committed
7223 7224 7225 7226
	DBUG_PRINT("enter",("lock_type: %d", lock_type));

	update_thd(thd);

7227 7228 7229 7230 7231 7232 7233 7234
	/* Statement based binlogging does not work in isolation level
	READ UNCOMMITTED and READ COMMITTED since the necessary
	locks cannot be taken. In this case, we print an
	informative error message and return with an error. */
	if (lock_type == F_WRLCK)
	{
		ulong const binlog_format= thd_binlog_format(thd);
		ulong const tx_isolation = thd_tx_isolation(current_thd);
vasil's avatar
vasil committed
7235 7236 7237
		if (tx_isolation <= ISO_READ_COMMITTED 
                   && binlog_format == BINLOG_FORMAT_STMT 
                   && thd_binlog_filter_ok(thd))
7238 7239 7240 7241 7242 7243 7244 7245 7246 7247 7248 7249 7250
		{
			char buf[256];
			my_snprintf(buf, sizeof(buf),
				    "Transaction level '%s' in"
				    " InnoDB is not safe for binlog mode '%s'",
				    tx_isolation_names[tx_isolation],
				    binlog_format_names[binlog_format]);
			my_error(ER_BINLOG_LOGGING_IMPOSSIBLE, MYF(0), buf);
			DBUG_RETURN(HA_ERR_LOGGING_IMPOSSIBLE);
		}
	}


osku's avatar
osku committed
7251 7252 7253 7254 7255
	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

7256
	reset_template(prebuilt);
osku's avatar
osku committed
7257 7258 7259 7260 7261 7262 7263 7264 7265 7266 7267 7268 7269

	if (lock_type == F_WRLCK) {

		/* If this is a SELECT, then it is in UPDATE TABLE ...
		or SELECT ... FOR UPDATE */
		prebuilt->select_lock_type = LOCK_X;
		prebuilt->stored_select_lock_type = LOCK_X;
	}

	if (lock_type != F_UNLCK) {
		/* MySQL is setting a new table lock */

		trx->detailed_error[0] = '\0';
7270

osku's avatar
osku committed
7271 7272
		/* Set the MySQL flag to mark that there is an active
		transaction */
7273
		if (trx->active_trans == 0) {
osku's avatar
osku committed
7274

7275
			innobase_register_trx_and_stmt(ht, thd);
7276 7277
			trx->active_trans = 1;
		} else if (trx->n_mysql_tables_in_use == 0) {
7278
			innobase_register_stmt(ht, thd);
osku's avatar
osku committed
7279 7280 7281
		}

		if (trx->isolation_level == TRX_ISO_SERIALIZABLE
7282
			&& prebuilt->select_lock_type == LOCK_NONE
7283 7284
			&& thd_test_options(thd,
				OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
7285 7286 7287 7288 7289 7290 7291 7292 7293 7294 7295 7296 7297 7298 7299 7300 7301

			/* 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
7302
		VERY easily deadlocks.
jan's avatar
jan committed
7303 7304

		We do not set InnoDB table locks if user has not explicitly
7305 7306
		requested a table lock. Note that thd_in_lock_tables(thd)
		can hold in some cases, e.g., at the start of a stored
jan's avatar
jan committed
7307
		procedure call (SQLCOM_CALL). */
osku's avatar
osku committed
7308 7309 7310

		if (prebuilt->select_lock_type != LOCK_NONE) {

7311 7312 7313
			if (thd_sql_command(thd) == SQLCOM_LOCK_TABLES
			    && THDVAR(thd, table_locks)
			    && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT)
7314
			    && thd_in_lock_tables(thd)) {
osku's avatar
osku committed
7315

7316 7317
				ulint	error = row_lock_table_for_mysql(
					prebuilt, NULL, 0);
osku's avatar
osku committed
7318 7319 7320

				if (error != DB_SUCCESS) {
					error = convert_error_code_to_mysql(
7321
						(int) error, thd);
osku's avatar
osku committed
7322 7323 7324 7325
					DBUG_RETURN((int) error);
				}
			}

7326
			trx->mysql_n_tables_locked++;
osku's avatar
osku committed
7327 7328
		}

7329 7330 7331
		trx->n_mysql_tables_in_use++;
		prebuilt->mysql_has_locked = TRUE;

osku's avatar
osku committed
7332 7333 7334 7335 7336 7337 7338 7339
		DBUG_RETURN(0);
	}

	/* MySQL is releasing a table lock */

	trx->n_mysql_tables_in_use--;
	prebuilt->mysql_has_locked = FALSE;

vasil's avatar
vasil committed
7340 7341 7342 7343 7344 7345
	/* 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
7346 7347 7348 7349 7350
	/* 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) {

7351
		trx->mysql_n_tables_locked = 0;
osku's avatar
osku committed
7352
		prebuilt->used_in_HANDLER = FALSE;
7353

7354
		if (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
7355
			if (trx->active_trans != 0) {
7356
				innobase_commit(ht, thd, TRUE);
osku's avatar
osku committed
7357 7358 7359
			}
		} else {
			if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
7360
						&& trx->global_read_view) {
osku's avatar
osku committed
7361 7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374 7375 7376 7377 7378 7379

				/* At low transaction isolation levels we let
				each consistent read set its own snapshot */

				read_view_close_for_mysql(trx);
			}
		}
	}

	DBUG_RETURN(0);
}

/**********************************************************************
With this function MySQL request a transactional lock to a table when
user issued query LOCK TABLES..WHERE ENGINE = InnoDB. */

int
ha_innobase::transactional_table_lock(
/*==================================*/
7380
				/* out: error code */
osku's avatar
osku committed
7381
	THD*	thd,		/* in: handle to the user thread */
7382
	int	lock_type)	/* in: lock type */
osku's avatar
osku committed
7383 7384 7385
{
	trx_t*		trx;

7386
	DBUG_ENTER("ha_innobase::transactional_table_lock");
osku's avatar
osku committed
7387 7388 7389 7390 7391 7392 7393 7394
	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);

7395
	if (prebuilt->table->ibd_file_missing && !thd_tablespace_op(thd)) {
7396
		ut_print_timestamp(stderr);
7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407
		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?"
			"InnoDB: See"
			" http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html\n"
			"InnoDB: how you can resolve the problem.\n",
			prebuilt->table->name);
osku's avatar
osku committed
7408 7409 7410 7411 7412 7413 7414 7415
		DBUG_RETURN(HA_ERR_CRASHED);
	}

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

7416
	reset_template(prebuilt);
osku's avatar
osku committed
7417 7418 7419 7420 7421 7422 7423 7424

	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 {
7425 7426
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB error:\n"
osku's avatar
osku committed
7427 7428 7429 7430 7431 7432 7433 7434 7435
"MySQL is trying to set transactional table lock with corrupted lock type\n"
"to table %s, lock type %d does not exist.\n",
				prebuilt->table->name, lock_type);
		DBUG_RETURN(HA_ERR_CRASHED);
	}

	/* MySQL is setting a new transactional table lock */

	/* Set the MySQL flag to mark that there is an active transaction */
7436
	if (trx->active_trans == 0) {
osku's avatar
osku committed
7437

7438
		innobase_register_trx_and_stmt(ht, thd);
7439 7440
		trx->active_trans = 1;
	}
osku's avatar
osku committed
7441

7442
	if (THDVAR(thd, table_locks) && thd_in_lock_tables(thd)) {
osku's avatar
osku committed
7443 7444 7445 7446 7447
		ulint	error = DB_SUCCESS;

		error = row_lock_table_for_mysql(prebuilt, NULL, 0);

		if (error != DB_SUCCESS) {
7448
			error = convert_error_code_to_mysql((int) error, thd);
osku's avatar
osku committed
7449 7450 7451
			DBUG_RETURN((int) error);
		}

7452
		if (thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
osku's avatar
osku committed
7453

7454 7455
			/* Store the current undo_no of the transaction
			so that we know where to roll back if we have
osku's avatar
osku committed
7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466
			to roll back the next SQL statement */

			trx_mark_sql_stat_end(trx);
		}
	}

	DBUG_RETURN(0);
}

/****************************************************************************
Here we export InnoDB status variables to MySQL.  */
7467
static
osku's avatar
osku committed
7468
int
7469 7470
innodb_export_status()
/*==================*/
osku's avatar
osku committed
7471
{
7472 7473 7474 7475 7476
	if (innodb_inited) {
		srv_export_innodb_status();
	}

	return 0;
osku's avatar
osku committed
7477 7478 7479 7480 7481
}

/****************************************************************************
Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
Monitor to the client. */
7482
static
osku's avatar
osku committed
7483 7484 7485
bool
innodb_show_status(
/*===============*/
7486
	handlerton*	hton,	/* in: the innodb handlerton */
osku's avatar
osku committed
7487 7488
	THD*	thd,	/* in: the MySQL query thread of the caller */
	stat_print_fn *stat_print)
osku's avatar
osku committed
7489 7490 7491 7492 7493 7494 7495
{
	trx_t*			trx;
	static const char	truncated_msg[] = "... truncated...\n";
	const long		MAX_STATUS_SIZE = 64000;
	ulint			trx_list_start = ULINT_UNDEFINED;
	ulint			trx_list_end = ULINT_UNDEFINED;

7496
	DBUG_ENTER("innodb_show_status");
osku's avatar
osku committed
7497

7498
	trx = check_trx_exists(thd);
osku's avatar
osku committed
7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509

	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;

	mutex_enter_noninline(&srv_monitor_file_mutex);
	rewind(srv_monitor_file);
7510 7511
	srv_printf_innodb_monitor(srv_monitor_file, FALSE,
				  &trx_list_start, &trx_list_end);
osku's avatar
osku committed
7512 7513 7514 7515 7516 7517 7518 7519 7520 7521 7522 7523 7524 7525 7526 7527
	flen = ftell(srv_monitor_file);
	os_file_set_eof(srv_monitor_file);

	if (flen < 0) {
		flen = 0;
	}

	if (flen > MAX_STATUS_SIZE) {
		usable_len = MAX_STATUS_SIZE;
	} else {
		usable_len = flen;
	}

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

marko's avatar
marko committed
7528
	if (!(str = (char*) my_malloc(usable_len + 1, MYF(0)))) {
7529 7530 7531
	  mutex_exit_noninline(&srv_monitor_file_mutex);
	  DBUG_RETURN(TRUE);
	}
osku's avatar
osku committed
7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542 7543 7544 7545 7546 7547 7548 7549 7550 7551 7552 7553 7554 7555

	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);
	}

	mutex_exit_noninline(&srv_monitor_file_mutex);

7556 7557
	stat_print(thd, innobase_hton_name, (uint) strlen(innobase_hton_name),
		   STRING_WITH_LEN(""), str, flen);
osku's avatar
osku committed
7558

osku's avatar
osku committed
7559
	my_free(str, MYF(0));
osku's avatar
osku committed
7560

osku's avatar
osku committed
7561
	DBUG_RETURN(FALSE);
osku's avatar
osku committed
7562 7563 7564 7565
}

/****************************************************************************
Implements the SHOW MUTEX STATUS command. . */
7566
static
osku's avatar
osku committed
7567 7568
bool
innodb_mutex_show_status(
7569
/*=====================*/
7570
	handlerton*	hton,	/* in: the innodb handlerton */
7571 7572 7573 7574 7575 7576
	THD*		thd,		/* in: the MySQL query thread of the
					caller */
	stat_print_fn*	stat_print)
{
	char buf1[IO_SIZE], buf2[IO_SIZE];
	mutex_t*  mutex;
7577
#ifdef UNIV_DEBUG
7578 7579 7580 7581 7582 7583
	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;
7584
#endif /* UNIV_DEBUG */
vasil's avatar
vasil committed
7585
	uint	  hton_name_len= (uint) strlen(innobase_hton_name), buf1len, buf2len;
7586
	DBUG_ENTER("innodb_mutex_show_status");
osku's avatar
osku committed
7587

7588
	mutex_enter_noninline(&mutex_list_mutex);
osku's avatar
osku committed
7589

7590 7591 7592
	mutex = UT_LIST_GET_FIRST(mutex_list);

	while (mutex != NULL) {
7593
#ifdef UNIV_DEBUG
7594 7595 7596 7597 7598 7599 7600 7601 7602 7603 7604 7605 7606 7607 7608
		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,
marko's avatar
marko committed
7609
					(ulong) (mutex->lspent_time/1000));
7610

marko's avatar
marko committed
7611
				if (stat_print(thd, innobase_hton_name,
7612 7613
						hton_name_len, buf1, buf1len,
						buf2, buf2len)) {
7614 7615
					mutex_exit_noninline(
						&mutex_list_mutex);
7616 7617 7618 7619 7620 7621 7622 7623 7624 7625 7626 7627
					DBUG_RETURN(1);
				}
			}
		}
		else {
			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;
		}
7628
#else /* UNIV_DEBUG */
vasil's avatar
vasil committed
7629
		buf1len= (uint) my_snprintf(buf1, sizeof(buf1), "%s:%lu",
7630
				     mutex->cfile_name, (ulong) mutex->cline);
vasil's avatar
vasil committed
7631
		buf2len= (uint) my_snprintf(buf2, sizeof(buf2), "os_waits=%lu",
7632 7633 7634 7635 7636 7637 7638 7639 7640
				     mutex->count_os_wait);

		if (stat_print(thd, innobase_hton_name,
			       hton_name_len, buf1, buf1len,
			       buf2, buf2len)) {
			mutex_exit_noninline(&mutex_list_mutex);
			DBUG_RETURN(1);
		}
#endif /* UNIV_DEBUG */
osku's avatar
osku committed
7641

7642 7643 7644
		mutex = UT_LIST_GET_NEXT(list, mutex);
	}

7645 7646 7647
	mutex_exit_noninline(&mutex_list_mutex);

#ifdef UNIV_DEBUG
7648 7649 7650 7651 7652 7653
	buf2len= my_snprintf(buf2, sizeof(buf2),
		"count=%lu, spin_waits=%lu, spin_rounds=%lu, "
		"os_waits=%lu, os_yields=%lu, os_wait_times=%lu",
		rw_lock_count, rw_lock_count_spin_loop,
		rw_lock_count_spin_rounds,
		rw_lock_count_os_wait, rw_lock_count_os_yield,
marko's avatar
marko committed
7654
		(ulong) (rw_lock_wait_time/1000));
7655

marko's avatar
marko committed
7656
	if (stat_print(thd, innobase_hton_name, hton_name_len,
7657 7658 7659
			STRING_WITH_LEN("rw_lock_mutexes"), buf2, buf2len)) {
		DBUG_RETURN(1);
	}
7660
#endif /* UNIV_DEBUG */
7661 7662

	DBUG_RETURN(FALSE);
osku's avatar
osku committed
7663 7664
}

7665
static
7666 7667 7668
bool innobase_show_status(handlerton *hton, THD* thd, 
                          stat_print_fn* stat_print,
                          enum ha_stat_type stat_type)
7669 7670 7671
{
	switch (stat_type) {
	case HA_ENGINE_STATUS:
7672
		return innodb_show_status(hton, thd, stat_print);
7673
	case HA_ENGINE_MUTEX:
7674
		return innodb_mutex_show_status(hton, thd, stat_print);
7675 7676 7677
	default:
		return FALSE;
	}
osku's avatar
osku committed
7678 7679 7680
}


osku's avatar
osku committed
7681 7682 7683 7684 7685
/****************************************************************************
 Handling the shared INNOBASE_SHARE structure that is needed to provide table
 locking.
****************************************************************************/

7686
static uchar* innobase_get_key(INNOBASE_SHARE* share, size_t *length,
7687 7688 7689 7690
	my_bool not_used __attribute__((unused)))
{
	*length=share->table_name_length;

7691
	return (uchar*) share->table_name;
osku's avatar
osku committed
7692 7693
}

7694
static INNOBASE_SHARE* get_share(const char* table_name)
osku's avatar
osku committed
7695
{
7696 7697 7698 7699 7700
	INNOBASE_SHARE *share;
	pthread_mutex_lock(&innobase_share_mutex);
	uint length=(uint) strlen(table_name);

	if (!(share=(INNOBASE_SHARE*) hash_search(&innobase_open_tables,
7701
				(uchar*) table_name,
7702 7703
				length))) {

osku's avatar
osku committed
7704 7705
		share = (INNOBASE_SHARE *) my_malloc(sizeof(*share)+length+1,
			MYF(MY_FAE | MY_ZEROFILL));
7706

osku's avatar
osku committed
7707 7708 7709 7710 7711
		share->table_name_length=length;
		share->table_name=(char*) (share+1);
		strmov(share->table_name,table_name);

		if (my_hash_insert(&innobase_open_tables,
7712
				(uchar*) share)) {
osku's avatar
osku committed
7713
			pthread_mutex_unlock(&innobase_share_mutex);
marko's avatar
marko committed
7714
			my_free(share,0);
osku's avatar
osku committed
7715 7716

			return 0;
7717
		}
osku's avatar
osku committed
7718 7719 7720

		thr_lock_init(&share->lock);
		pthread_mutex_init(&share->mutex,MY_MUTEX_INIT_FAST);
7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731 7732 7733
	}

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

	return share;
}

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

	if (!--share->use_count) {
7734
		hash_delete(&innobase_open_tables, (uchar*) share);
7735 7736
		thr_lock_delete(&share->lock);
		pthread_mutex_destroy(&share->mutex);
marko's avatar
marko committed
7737
		my_free(share, MYF(0));
7738 7739 7740
	}

	pthread_mutex_unlock(&innobase_share_mutex);
osku's avatar
osku committed
7741 7742 7743 7744 7745 7746 7747 7748 7749 7750 7751 7752 7753 7754 7755 7756 7757 7758 7759 7760 7761 7762
}

/*********************************************************************
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
end of an SQL statement. */

THR_LOCK_DATA**
ha_innobase::store_lock(
/*====================*/
						/* out: pointer to the next
						element in the 'to' array */
	THD*			thd,		/* in: user thread handle */
	THR_LOCK_DATA**		to,		/* in: pointer to an array
						of pointers to lock structs;
						pointer to the 'lock' field
						of current handle is stored
						next to this array */
7763
	enum thr_lock_type	lock_type)	/* in: lock type to store in
osku's avatar
osku committed
7764 7765 7766
						'lock'; this may also be
						TL_IGNORE */
{
7767 7768
	trx_t*		trx;

7769 7770 7771
	/* 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. */
7772

7773
	trx = check_trx_exists(thd);
osku's avatar
osku committed
7774

7775
	/* NOTE: MySQL can call this function with lock 'type' TL_IGNORE!
osku's avatar
osku committed
7776 7777 7778
	Be careful to ignore TL_IGNORE if we are going to do something with
	only 'real' locks! */

7779
	/* If no MySQL table is in use, we need to set the isolation level
7780 7781 7782
	of the transaction. */

	if (lock_type != TL_IGNORE
7783
	    && trx->n_mysql_tables_in_use == 0) {
7784
		trx->isolation_level = innobase_map_isolation_level(
7785
			(enum_tx_isolation) thd_tx_isolation(thd));
7786 7787 7788 7789 7790 7791 7792 7793 7794

		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);
		}
7795 7796
	}

7797
	DBUG_ASSERT(thd == current_thd);
7798
	const bool in_lock_tables = thd_in_lock_tables(thd);
7799
	const uint sql_command = thd_sql_command(thd);
7800

7801
	if (sql_command == SQLCOM_DROP_TABLE) {
7802 7803 7804 7805 7806

		/* 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. */ 

7807 7808 7809 7810 7811 7812
	} 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
7813 7814

		/* The OR cases above are in this order:
7815 7816
		1) MySQL is doing LOCK TABLES ... READ LOCAL, or we
		are processing a stored procedure or function, or
osku's avatar
osku committed
7817 7818 7819 7820 7821 7822 7823 7824 7825 7826 7827 7828 7829 7830 7831
		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. */

7832 7833 7834 7835 7836
		ulint	isolation_level;

		isolation_level = trx->isolation_level;

		if ((srv_locks_unsafe_for_binlog
7837
		     || isolation_level <= TRX_ISO_READ_COMMITTED)
7838 7839 7840 7841
		    && isolation_level != TRX_ISO_SERIALIZABLE
		    && (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT)
		    && (sql_command == SQLCOM_INSERT_SELECT
			|| sql_command == SQLCOM_UPDATE
7842 7843
			|| sql_command == SQLCOM_CREATE_TABLE
			|| sql_command == SQLCOM_SET_OPTION)) {
osku's avatar
osku committed
7844

7845 7846 7847
			/* 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
7848
			is not set to serializable and MySQL is doing
7849
			INSERT INTO...SELECT or UPDATE ... = (SELECT ...) or
7850 7851 7852
			CREATE  ... SELECT... or SET ... = (SELECT ...)
			without FOR UPDATE or IN SHARE MODE in select,
			then we use consistent read for select. */
osku's avatar
osku committed
7853 7854 7855

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
7856
		} else if (sql_command == SQLCOM_CHECKSUM) {
osku's avatar
osku committed
7857 7858 7859 7860 7861 7862 7863 7864 7865 7866 7867
			/* 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) {

jan's avatar
jan committed
7868
		/* We set possible LOCK_X value in external_lock, not yet
osku's avatar
osku committed
7869 7870 7871 7872 7873 7874 7875 7876
		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) {

jan's avatar
jan committed
7877
		/* Starting from 5.0.7, we weaken also the table locks
osku's avatar
osku committed
7878 7879
		set at the start of a MySQL stored procedure call, just like
		we weaken the locks set at the start of an SQL statement.
7880
		MySQL does set in_lock_tables TRUE there, but in reality
osku's avatar
osku committed
7881 7882 7883 7884
		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). */

7885
		if (lock_type == TL_READ
7886
		    && sql_command == SQLCOM_LOCK_TABLES) {
osku's avatar
osku committed
7887 7888 7889 7890 7891 7892 7893 7894 7895 7896 7897 7898 7899 7900
			/* 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;
		}

jan's avatar
jan committed
7901
		/* If we are not doing a LOCK TABLE, DISCARD/IMPORT
7902
		TABLESPACE or TRUNCATE TABLE then allow multiple
jan's avatar
jan committed
7903 7904 7905
		writers. Note that ALTER TABLE uses a TL_WRITE_ALLOW_READ
		< TL_WRITE_CONCURRENT_INSERT.

7906
		We especially allow multiple writers if MySQL is at the
jan's avatar
jan committed
7907
		start of a stored procedure call (SQLCOM_CALL) or a
7908
		stored function call (MySQL does have in_lock_tables
jan's avatar
jan committed
7909
		TRUE there). */
osku's avatar
osku committed
7910

7911
		if ((lock_type >= TL_WRITE_CONCURRENT_INSERT
7912 7913 7914 7915 7916 7917 7918
		     && 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
7919

jan's avatar
jan committed
7920
			lock_type = TL_WRITE_ALLOW_WRITE;
7921
		}
osku's avatar
osku committed
7922 7923 7924 7925 7926

		/* 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
7927
		concurrent inserts to t2.
jan's avatar
jan committed
7928

7929 7930
		We especially allow concurrent inserts if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL)
7931
		(MySQL does have thd_in_lock_tables() TRUE there). */
7932

osku's avatar
osku committed
7933
		if (lock_type == TL_READ_NO_INSERT
7934
		    && sql_command != SQLCOM_LOCK_TABLES) {
osku's avatar
osku committed
7935 7936 7937

			lock_type = TL_READ;
		}
7938

jan's avatar
jan committed
7939 7940
		lock.type = lock_type;
	}
osku's avatar
osku committed
7941

jan's avatar
jan committed
7942
	*to++= &lock;
osku's avatar
osku committed
7943 7944 7945 7946

	return(to);
}

7947 7948 7949 7950
/*******************************************************************************
Read the next autoinc value. Acquire the relevant locks before reading
the AUTOINC value. If SUCCESS then the table AUTOINC mutex will be locked
on return and all relevant locks acquired. */
osku's avatar
osku committed
7951

7952 7953 7954 7955 7956
ulong
ha_innobase::innobase_get_autoinc(
/*==============================*/
					/* out: DB_SUCCESS or error code */
	ulonglong*	value)		/* out: autoinc value */
osku's avatar
osku committed
7957
{
7958 7959 7960
 	*value = 0;
 
	prebuilt->autoinc_error = innobase_lock_autoinc();
osku's avatar
osku committed
7961

7962
	if (prebuilt->autoinc_error == DB_SUCCESS) {
osku's avatar
osku committed
7963

7964 7965
		/* Determine the first value of the interval */
		*value = dict_table_autoinc_read(prebuilt->table);
osku's avatar
osku committed
7966

7967
		/* It should have been initialized during open. */
sunny's avatar
sunny committed
7968 7969 7970 7971
		if (*value == 0) {
			prebuilt->autoinc_error = DB_UNSUPPORTED;
			dict_table_autoinc_unlock(prebuilt->table);
		}
osku's avatar
osku committed
7972
	}
7973 7974
  
	return(ulong(prebuilt->autoinc_error));
7975 7976
}

7977 7978 7979
/***********************************************************************
This function reads the global auto-inc counter. It doesn't use the 
AUTOINC lock even if the lock mode is set to TRADITIONAL. */
7980

7981 7982 7983 7984
ulonglong
ha_innobase::innobase_peek_autoinc()
/*================================*/
					/* out: the autoinc value */
7985
{
7986 7987
	ulonglong	auto_inc;
	dict_table_t*	innodb_table;
7988

7989 7990
	ut_a(prebuilt != NULL);
	ut_a(prebuilt->table != NULL);
7991

7992
	innodb_table = prebuilt->table;
7993

7994
	dict_table_autoinc_lock(innodb_table);
7995

7996
	auto_inc = dict_table_autoinc_read(innodb_table);
7997

7998
	ut_a(auto_inc > 0);
7999

8000 8001 8002
	dict_table_autoinc_unlock(innodb_table);
 
	return(auto_inc);
osku's avatar
osku committed
8003 8004
}

marko's avatar
marko committed
8005
/*******************************************************************************
osku's avatar
osku committed
8006 8007 8008
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
marko's avatar
marko committed
8009 8010 8011
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.
*first_value is set to -1 if error (deadlock or lock wait timeout)            */
osku's avatar
osku committed
8012

8013 8014
void
ha_innobase::get_auto_increment(
8015
/*============================*/
8016 8017 8018 8019 8020
        ulonglong	offset,              /* in: */
        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
8021
{
sunny's avatar
sunny committed
8022
	trx_t*		trx;
8023 8024
	ulint		error;
	ulonglong	autoinc = 0;
8025

8026
	/* Prepare prebuilt->trx in the table handle */
8027
	update_thd(ha_thd());
8028

8029
	error = innobase_get_autoinc(&autoinc);
osku's avatar
osku committed
8030

8031 8032
	if (error != DB_SUCCESS) {
		*first_value = (~(ulonglong) 0);
marko's avatar
marko committed
8033
		return;
osku's avatar
osku committed
8034 8035
	}

8036 8037 8038 8039 8040 8041
	/* 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()).
sunny's avatar
sunny committed
8042
	*/
8043

sunny's avatar
sunny committed
8044
	trx = prebuilt->trx;
8045

8046 8047 8048 8049 8050
	/* 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. */

8051 8052 8053 8054 8055
	/* 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);

sunny's avatar
sunny committed
8056 8057
	/* Called for the first time ? */
	if (trx->n_autoinc_rows == 0) {
8058

marko's avatar
marko committed
8059
		trx->n_autoinc_rows = (ulint) nb_desired_values;
8060

sunny's avatar
sunny committed
8061 8062 8063 8064 8065
		/* 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;
8066 8067
		}

marko's avatar
marko committed
8068
		set_if_bigger(*first_value, autoinc);
sunny's avatar
sunny committed
8069
	/* Not in the middle of a mult-row INSERT. */
8070
	} else if (prebuilt->autoinc_last_value == 0) {
marko's avatar
marko committed
8071
		set_if_bigger(*first_value, autoinc);
8072 8073 8074 8075 8076
	/* 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;
8077 8078
	}

sunny's avatar
sunny committed
8079
	*nb_reserved_values = trx->n_autoinc_rows;
8080

8081 8082 8083
	/* 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) {
8084
		ulonglong	need;
8085
		ulonglong	current;
8086
		ulonglong	next_value;
8087

8088
		current = *first_value > col_max_value ? autoinc : *first_value;
8089
		need = *nb_reserved_values * increment;
8090

8091
		/* Compute the last value in the interval */
8092
		next_value = innobase_next_autoinc(
8093
			current, need, offset, col_max_value);
8094 8095

		prebuilt->autoinc_last_value = next_value;
8096

8097 8098 8099 8100 8101 8102 8103
		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);
		}
8104 8105 8106
	} else {
		/* This will force write_row() into attempting an update
		of the table's AUTOINC counter. */
8107
		prebuilt->autoinc_last_value = 0;
8108
	}
8109 8110 8111

	/* The increment to be used to increase the AUTOINC value, we use
	this in write_row() and update_row() to increase the autoinc counter
8112 8113 8114 8115
	for columns that are filled by the user. We need the offset and
	the increment. */
	prebuilt->autoinc_offset = offset;
	prebuilt->autoinc_increment = increment;
8116 8117

	dict_table_autoinc_unlock(prebuilt->table);
osku's avatar
osku committed
8118 8119 8120 8121
}

/* See comment in handler.h */
int
8122 8123 8124
ha_innobase::reset_auto_increment(
/*==============================*/
	ulonglong	value)		/* in: new value for table autoinc */
osku's avatar
osku committed
8125 8126 8127
{
	DBUG_ENTER("ha_innobase::reset_auto_increment");

osku's avatar
osku committed
8128
	int	error;
osku's avatar
osku committed
8129

8130
	update_thd(ha_thd());
8131

osku's avatar
osku committed
8132 8133 8134 8135 8136 8137
	error = row_lock_table_autoinc_for_mysql(prebuilt);

	if (error != DB_SUCCESS) {
		error = convert_error_code_to_mysql(error, user_thd);

		DBUG_RETURN(error);
8138
	}
osku's avatar
osku committed
8139

8140 8141 8142 8143 8144
	/* The next value can never be 0. */
	if (value == 0) {
		value = 1;
	}

8145
	innobase_reset_autoinc(value);
osku's avatar
osku committed
8146 8147 8148 8149 8150 8151 8152 8153

	DBUG_RETURN(0);
}

/* See comment in handler.cc */
bool
ha_innobase::get_error_message(int error, String *buf)
{
8154
	trx_t*	trx = check_trx_exists(ha_thd());
osku's avatar
osku committed
8155

vasil's avatar
vasil committed
8156
	buf->copy(trx->detailed_error, (uint) strlen(trx->detailed_error),
osku's avatar
osku committed
8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171
		system_charset_info);

	return FALSE;
}

/***********************************************************************
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
InnoDB internally uses the row id as the primary key. */

int
ha_innobase::cmp_ref(
/*=================*/
				/* out: < 0 if ref1 < ref2, 0 if equal, else
				> 0 */
8172
	const uchar*	ref1,	/* in: an (internal) primary key value in the
osku's avatar
osku committed
8173
				MySQL key value format */
8174
	const uchar*	ref2)	/* in: an (internal) primary key value in the
osku's avatar
osku committed
8175 8176 8177 8178 8179 8180 8181 8182
				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;
8183
	int		result;
osku's avatar
osku committed
8184 8185 8186 8187 8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201 8202

	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();

marko's avatar
marko committed
8203 8204 8205 8206
		if (mysql_type == MYSQL_TYPE_TINY_BLOB
			|| mysql_type == MYSQL_TYPE_MEDIUM_BLOB
			|| mysql_type == MYSQL_TYPE_BLOB
			|| mysql_type == MYSQL_TYPE_LONG_BLOB) {
8207

osku's avatar
osku committed
8208 8209 8210 8211 8212 8213 8214 8215
			/* 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;
marko's avatar
marko committed
8216 8217
			result = ((Field_blob*)field)->cmp( ref1, len1,
                                                            ref2, len2);
osku's avatar
osku committed
8218 8219 8220 8221 8222 8223 8224 8225 8226 8227 8228 8229 8230 8231 8232 8233
		} else {
			result = field->key_cmp(ref1, ref2);
		}

		if (result) {

			return(result);
		}

		ref1 += key_part->store_length;
		ref2 += key_part->store_length;
	}

	return(0);
}

marko's avatar
marko committed
8234 8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246 8247 8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260
/***********************************************************************
Ask InnoDB if a query to a table can be cached. */

my_bool
ha_innobase::register_query_cache_table(
/*====================================*/
					/* out: TRUE if query caching
					of the table is permitted */
	THD*		thd,		/* in: user thread handle */
	char*		table_key,	/* in: concatenation of database name,
					the null character '\0',
					and the table name */
	uint		key_length,	/* in: length of the full name, i.e.
					len(dbname) + len(tablename) + 1 */
	qc_engine_callback*
			call_back,	/* out: pointer to function for
					checking if query caching
					is permitted */
	ulonglong	*engine_data)	/* in/out: data to call_back */
{
	*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));
}

osku's avatar
osku committed
8261 8262 8263 8264 8265 8266 8267 8268 8269
char*
ha_innobase::get_mysql_bin_log_name()
{
	return(trx_sys_mysql_bin_log_name);
}

ulonglong
ha_innobase::get_mysql_bin_log_pos()
{
8270
	/* trx... is ib_longlong, which is a typedef for a 64-bit integer
osku's avatar
osku committed
8271 8272
	(__int64 or longlong) so it's ok to cast it to ulonglong. */

8273
	return(trx_sys_mysql_bin_log_pos);
osku's avatar
osku committed
8274 8275 8276 8277 8278 8279 8280 8281 8282 8283
}

/**********************************************************************
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
index field in bytes.

NOTE: the prototype of this function is copied to data0type.c! If you change
this function, you MUST change also data0type.c! */
8284
extern "C"
osku's avatar
osku committed
8285 8286 8287 8288 8289 8290 8291 8292 8293
ulint
innobase_get_at_most_n_mbchars(
/*===========================*/
				/* out: number of bytes occupied by the first
				n characters */
	ulint charset_id,	/* in: character set id */
	ulint prefix_len,	/* in: prefix length in bytes of the index
				(this has to be divided by mbmaxlen to get the
				number of CHARACTERS n in the prefix) */
8294
	ulint data_len,		/* in: length of the string in bytes */
osku's avatar
osku committed
8295 8296 8297 8298 8299 8300 8301 8302 8303 8304 8305 8306 8307 8308 8309 8310 8311 8312 8313 8314 8315 8316 8317 8318 8319 8320 8321 8322 8323 8324 8325 8326 8327 8328 8329 8330 8331 8332 8333 8334 8335 8336 8337
	const char* str)	/* in: character string */
{
	ulint char_length;	/* character length in bytes */
	ulint n_chars;		/* number of characters in prefix */
	CHARSET_INFO* charset;	/* charset used in the field */

	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;
8338
		}
osku's avatar
osku committed
8339 8340 8341 8342 8343 8344 8345 8346 8347 8348 8349 8350 8351
	} else {
		if (data_len < prefix_len) {
			char_length = data_len;
		} else {
			char_length = prefix_len;
		}
	}

	return(char_length);
}

/***********************************************************************
This function is used to prepare X/Open XA distributed transaction   */
8352
static
8353
int
osku's avatar
osku committed
8354 8355 8356
innobase_xa_prepare(
/*================*/
			/* out: 0 or error number */
8357
        handlerton *hton,
osku's avatar
osku committed
8358 8359 8360 8361 8362 8363
	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 */
{
	int error = 0;
8364
	trx_t* trx = check_trx_exists(thd);
osku's avatar
osku committed
8365

8366 8367
	if (thd_sql_command(thd) != SQLCOM_XA_PREPARE &&
	    (all || !thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))
8368
	{
osku's avatar
osku committed
8369

8370 8371
		/* For ibbackup to work the order of transactions in binlog
		and InnoDB must be the same. Consider the situation
osku's avatar
osku committed
8372

8373 8374 8375 8376
		  thread1> prepare; write to binlog; ...
			  <context switch>
		  thread2> prepare; write to binlog; commit
		  thread1>			     ... commit
osku's avatar
osku committed
8377

8378 8379
		To ensure this will not happen we're taking the mutex on
		prepare, and releasing it on commit.
osku's avatar
osku committed
8380

8381 8382 8383 8384 8385 8386
		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
vasil's avatar
vasil committed
8387
		to block for undefined period of time. */
8388 8389 8390
		pthread_mutex_lock(&prepare_commit_mutex);
		trx->active_trans = 2;
	}
osku's avatar
osku committed
8391

8392
	if (!THDVAR(thd, support_xa)) {
osku's avatar
osku committed
8393 8394 8395 8396

		return(0);
	}

8397
	thd_get_xid(thd, (MYSQL_XID*) &trx->xid);
osku's avatar
osku committed
8398 8399 8400 8401 8402 8403 8404 8405 8406 8407 8408 8409 8410 8411

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

	innobase_release_stat_resources(trx);

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

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

	if (all
8412
		|| (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
osku's avatar
osku committed
8413

8414 8415
		/* We were instructed to prepare the whole transaction, or
		this is an SQL statement end and autocommit is on */
osku's avatar
osku committed
8416

8417
		ut_ad(trx->active_trans);
osku's avatar
osku committed
8418 8419 8420

		error = (int) trx_prepare_for_mysql(trx);
	} else {
8421
		/* We just mark the SQL statement ended and do not do a
osku's avatar
osku committed
8422 8423
		transaction prepare */

marko's avatar
marko committed
8424 8425
		/* If we had reserved the auto-inc lock for some
		table in this SQL statement we release it now */
osku's avatar
osku committed
8426

marko's avatar
marko committed
8427
		row_unlock_table_autoinc_for_mysql(trx);
8428

osku's avatar
osku committed
8429 8430 8431 8432 8433 8434 8435 8436 8437 8438 8439 8440
		/* 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();

8441
	return error;
osku's avatar
osku committed
8442 8443 8444 8445
}

/***********************************************************************
This function is used to recover X/Open XA distributed transactions   */
8446
static
8447
int
osku's avatar
osku committed
8448 8449
innobase_xa_recover(
/*================*/
8450
				/* out: number of prepared transactions
osku's avatar
osku committed
8451
				stored in xid_list */
8452
        handlerton *hton,
8453
	XID*	xid_list,	/* in/out: prepared transactions */
osku's avatar
osku committed
8454 8455 8456 8457 8458 8459 8460 8461 8462 8463 8464 8465 8466
	uint	len)		/* in: number of slots in xid_list */
{
	if (len == 0 || xid_list == NULL) {

		return(0);
	}

	return(trx_recover_for_mysql(xid_list, len));
}

/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */
8467
static
8468
int
osku's avatar
osku committed
8469 8470 8471
innobase_commit_by_xid(
/*===================*/
			/* out: 0 or error number */
8472
        handlerton *hton,
osku's avatar
osku committed
8473 8474 8475 8476 8477 8478 8479 8480
	XID*	xid)	/* in: X/Open XA transaction identification */
{
	trx_t*	trx;

	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		innobase_commit_low(trx);
8481

osku's avatar
osku committed
8482 8483 8484 8485 8486 8487 8488 8489 8490
		return(XA_OK);
	} else {
		return(XAER_NOTA);
	}
}

/***********************************************************************
This function is used to rollback one X/Open XA distributed transaction
which is in the prepared state */
8491
static
8492
int
osku's avatar
osku committed
8493 8494 8495
innobase_rollback_by_xid(
/*=====================*/
			/* out: 0 or error number */
8496
        handlerton *hton,
osku's avatar
osku committed
8497 8498 8499 8500 8501 8502 8503 8504 8505 8506 8507 8508 8509 8510 8511 8512
	XID	*xid)	/* in: X/Open XA transaction identification */
{
	trx_t*	trx;

	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		return(innobase_rollback_trx(trx));
	} else {
		return(XAER_NOTA);
	}
}

/***********************************************************************
Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
8513
This consistent view is then used inside of MySQL when accessing records
osku's avatar
osku committed
8514
using a cursor. */
8515
static
osku's avatar
osku committed
8516
void*
8517
innobase_create_cursor_view(
8518
/*========================*/
8519 8520 8521
                          /* out: pointer to cursor view or NULL */
        handlerton *hton, /* in: innobase hton */
	THD* thd)	  /* in: user thread handle */
osku's avatar
osku committed
8522
{
8523
	return(read_cursor_view_create_for_mysql(check_trx_exists(thd)));
osku's avatar
osku committed
8524 8525 8526 8527
}

/***********************************************************************
Close the given consistent cursor view of a transaction and restore
8528
global read view to a transaction read view. Transaction is created if the
osku's avatar
osku committed
8529
corresponding MySQL thread still lacks one. */
8530
static
osku's avatar
osku committed
8531 8532
void
innobase_close_cursor_view(
8533
/*=======================*/
8534 8535
        handlerton *hton,
	THD*	thd,	/* in: user thread handle */
osku's avatar
osku committed
8536 8537
	void*	curview)/* in: Consistent read view to be closed */
{
8538
	read_cursor_view_close_for_mysql(check_trx_exists(thd),
8539
					 (cursor_view_t*) curview);
osku's avatar
osku committed
8540 8541 8542
}

/***********************************************************************
8543 8544
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
8545 8546
consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
8547
static
osku's avatar
osku committed
8548 8549 8550
void
innobase_set_cursor_view(
/*=====================*/
8551 8552
        handlerton *hton,
	THD*	thd,	/* in: user thread handle */
osku's avatar
osku committed
8553 8554
	void*	curview)/* in: Consistent cursor view to be set */
{
8555
	read_cursor_set_for_mysql(check_trx_exists(thd),
8556
				  (cursor_view_t*) curview);
osku's avatar
osku committed
8557 8558
}

8559 8560 8561 8562 8563 8564 8565 8566 8567 8568 8569 8570 8571 8572 8573 8574 8575 8576 8577 8578 8579 8580 8581 8582 8583 8584 8585 8586 8587 8588 8589 8590 8591 8592 8593 8594 8595 8596
/***********************************************************************
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. */
static
bool
check_column_being_renamed(
/*=======================*/
					/* out: true if find the 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];

		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);
}
osku's avatar
osku committed
8597

vasil's avatar
vasil committed
8598 8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611 8612
/***********************************************************************
Check whether any of the given columns is being renamed in the table. */
static
bool
column_is_being_renamed(
/*====================*/
					/* out: true if any of col_names is
					being renamed in table */
	TABLE*		table,		/* in: MySQL table */
	uint		n_cols,		/* in: number of columns */
	const char**	col_names)	/* in: names of the columns */
{
	uint		j;

	for (j = 0; j < n_cols; j++) {
8613 8614
		if (check_column_being_renamed(table, col_names[j])) {
			return(true);
vasil's avatar
vasil committed
8615 8616 8617 8618 8619 8620 8621 8622 8623 8624 8625 8626 8627 8628 8629 8630 8631 8632 8633 8634 8635 8636 8637 8638 8639 8640 8641 8642 8643 8644 8645 8646 8647 8648 8649 8650 8651 8652 8653 8654 8655 8656 8657 8658 8659 8660 8661 8662 8663 8664 8665 8666 8667 8668 8669 8670 8671 8672 8673 8674 8675 8676 8677 8678 8679
		}
	}

	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);
}

8680 8681 8682
bool ha_innobase::check_if_incompatible_data(
	HA_CREATE_INFO*	info,
	uint		table_changes)
osku's avatar
osku committed
8683
{
8684
	if (table_changes != IS_EQUAL_YES) {
osku's avatar
osku committed
8685

8686 8687 8688 8689 8690 8691 8692 8693
		return COMPATIBLE_DATA_NO;
	}

	/* Check that auto_increment value was not changed */
	if ((info->used_fields & HA_CREATE_USED_AUTO) &&
		info->auto_increment_value != 0) {

		return COMPATIBLE_DATA_NO;
8694 8695 8696 8697 8698 8699 8700 8701 8702
	}

	/* 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;
8703 8704
	}

vasil's avatar
vasil committed
8705 8706 8707 8708 8709 8710 8711
	/* 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;
	}

8712
	/* Check that row format didn't change */
8713
	if ((info->used_fields & HA_CREATE_USED_ROW_FORMAT) &&
8714
		get_row_type() != info->row_type) {
osku's avatar
osku committed
8715

8716 8717 8718 8719 8720
		return COMPATIBLE_DATA_NO;
	}

	return COMPATIBLE_DATA_YES;
}
8721

marko's avatar
marko committed
8722 8723 8724 8725 8726 8727 8728 8729
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;
}

8730 8731 8732 8733 8734 8735 8736 8737 8738 8739 8740 8741 8742 8743 8744 8745 8746 8747 8748 8749 8750 8751 8752 8753 8754
/***********************************************************************
This function checks each index name for a table against reserved
system default primary index name 'GEN_CLUST_INDEX'. If a name matches,
this function pushes an error message to the client, and returns true. */
static
bool
innobase_index_name_is_reserved(
/*============================*/
					/* out: true if an index name
					matches the reserved name */
	const trx_t*	trx,		/* in: InnoDB transaction handle */
	const TABLE*	form,		/* in: information on table
					columns and indexes */
	const char*	norm_name)	/* in: table name */
{
	KEY*		key;
	uint		key_num;	/* index number */

	for (key_num = 0; key_num < form->s->keys; key_num++) {
		key = form->key_info + key_num;

		if (innobase_strcasecmp(key->name,
					innobase_index_reserve_name) == 0) {
			/* Push warning to mysql */
			push_warning_printf((THD*) trx->mysql_thd,
8755
					    MYSQL_ERROR::WARN_LEVEL_WARN,
8756 8757 8758 8759 8760 8761 8762 8763 8764 8765 8766 8767 8768 8769
					    ER_CANT_CREATE_TABLE,
					    "Cannot Create Index with name "
					    "'%s'. The name is reserved "
					    "for the system default primary "
					    "index.",
					    innobase_index_reserve_name);

			return(true);
		}
	}

	return(false);
}

8770
static SHOW_VAR innodb_status_variables_export[]= {
marko's avatar
marko committed
8771 8772 8773 8774
  {"Innodb",                   (char*) &show_innodb_vars, SHOW_FUNC},
  {NullS, NullS, SHOW_LONG}
};

8775
static struct st_mysql_storage_engine innobase_storage_engine=
8776
{ MYSQL_HANDLERTON_INTERFACE_VERSION };
8777

8778 8779 8780 8781 8782 8783 8784 8785 8786 8787 8788 8789 8790 8791 8792 8793 8794 8795 8796 8797 8798 8799 8800 8801 8802 8803 8804 8805 8806 8807 8808 8809 8810 8811 8812 8813 8814 8815 8816 8817 8818 8819 8820 8821 8822 8823 8824 8825 8826 8827 8828 8829 8830 8831 8832 8833 8834 8835 8836 8837 8838 8839 8840 8841 8842 8843 8844 8845 8846 8847 8848 8849 8850 8851 8852 8853 8854 8855 8856 8857 8858 8859 8860 8861 8862 8863
/* 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);

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

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

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);

static MYSQL_SYSVAR_STR(flush_method, innobase_unix_file_flush_method,
  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.",
  NULL, NULL, 90, 0, 100, 0);

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,
vasil's avatar
vasil committed
8864
  PLUGIN_VAR_OPCMDARG,
8865 8866 8867
  "Enable statistics gathering for metadata commands such as SHOW TABLE STATUS (on by default)",
  NULL, NULL, TRUE);

vasil's avatar
vasil committed
8868 8869 8870 8871 8872 8873 8874 8875
static MYSQL_SYSVAR_BOOL(use_legacy_cardinality_algorithm,
  srv_use_legacy_cardinality_algorithm,
  PLUGIN_VAR_OPCMDARG,
  "Use legacy algorithm for picking random pages during index cardinality "
  "estimation. Disable this to use a better algorithm, but note that your "
  "query plans may change (enabled by default).",
  NULL, NULL, TRUE);

vasil's avatar
vasil committed
8876
static MYSQL_SYSVAR_BOOL(adaptive_hash_index, innobase_adaptive_hash_index,
8877
  PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY,
vasil's avatar
vasil committed
8878 8879
  "Enable InnoDB adaptive hash index (enabled by default).  "
  "Disable with --skip-innodb-adaptive-hash-index.",
8880 8881
  NULL, NULL, TRUE);

8882 8883 8884
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.",
vasil's avatar
vasil committed
8885
  NULL, NULL, 1*1024*1024L, 512*1024L, LONG_MAX, 1024);
8886 8887 8888 8889 8890 8891 8892 8893 8894 8895 8896

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.",
  NULL, NULL, 8*1024*1024L, 1024*1024L, LONGLONG_MAX, 1024*1024L);

8897
static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency,
8898 8899
  PLUGIN_VAR_RQCMDARG,
  "Helps in performance tuning in heavily concurrent environments.",
8900
  innobase_commit_concurrency_validate, NULL, 0, 0, 1000, 0);
8901 8902 8903 8904 8905 8906 8907 8908 8909 8910 8911 8912 8913 8914 8915 8916 8917 8918 8919 8920 8921 8922 8923 8924

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,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Number of file I/O threads in InnoDB.",
  NULL, NULL, 4, 4, 64, 0);

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(lock_wait_timeout, innobase_lock_wait_timeout,
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
  "Timeout in seconds an InnoDB transaction may wait for a lock before being rolled back.",
  NULL, NULL, 50, 1, 1024 * 1024 * 1024, 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.",
vasil's avatar
vasil committed
8925
  NULL, NULL, 1024*1024L, 256*1024L, LONG_MAX, 1024);
8926 8927 8928 8929 8930 8931 8932 8933 8934 8935 8936 8937 8938 8939 8940 8941 8942 8943 8944

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);

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.",
vasil's avatar
vasil committed
8945
  NULL, NULL, 300L, 10L, LONG_MAX, 0);
8946 8947 8948 8949 8950 8951 8952 8953 8954 8955 8956 8957 8958 8959 8960 8961 8962 8963 8964 8965 8966

static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds,
  PLUGIN_VAR_RQCMDARG,
  "Count of spin-loop rounds in InnoDB mutexes",
  NULL, NULL, 20L, 0L, ~0L, 0);

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.",
  NULL, NULL, 8, 0, 1000, 0);

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);

8967
static MYSQL_SYSVAR_LONG(autoinc_lock_mode, innobase_autoinc_lock_mode,
marko's avatar
marko committed
8968
  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
vasil's avatar
vasil committed
8969 8970 8971 8972 8973
  "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)",
8974 8975 8976 8977 8978
  NULL, NULL,
  AUTOINC_NEW_STYLE_LOCKING,	/* Default setting */
  AUTOINC_OLD_STYLE_LOCKING,	/* Minimum value */
  AUTOINC_NO_LOCKING, 0);	/* Maximum value */

8979 8980 8981 8982 8983 8984 8985 8986 8987 8988 8989 8990 8991 8992 8993 8994 8995 8996 8997 8998 8999 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 9010
static struct st_mysql_sys_var* innobase_system_variables[]= {
  MYSQL_SYSVAR(additional_mem_pool_size),
  MYSQL_SYSVAR(autoextend_increment),
  MYSQL_SYSVAR(buffer_pool_size),
  MYSQL_SYSVAR(checksums),
  MYSQL_SYSVAR(commit_concurrency),
  MYSQL_SYSVAR(concurrency_tickets),
  MYSQL_SYSVAR(data_file_path),
  MYSQL_SYSVAR(data_home_dir),
  MYSQL_SYSVAR(doublewrite),
  MYSQL_SYSVAR(fast_shutdown),
  MYSQL_SYSVAR(file_io_threads),
  MYSQL_SYSVAR(file_per_table),
  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),
  MYSQL_SYSVAR(max_purge_lag),
  MYSQL_SYSVAR(mirrored_log_groups),
  MYSQL_SYSVAR(open_files),
  MYSQL_SYSVAR(rollback_on_timeout),
  MYSQL_SYSVAR(stats_on_metadata),
vasil's avatar
vasil committed
9011
  MYSQL_SYSVAR(use_legacy_cardinality_algorithm),
vasil's avatar
vasil committed
9012
  MYSQL_SYSVAR(adaptive_hash_index),
9013 9014 9015 9016 9017 9018
  MYSQL_SYSVAR(status_file),
  MYSQL_SYSVAR(support_xa),
  MYSQL_SYSVAR(sync_spin_loops),
  MYSQL_SYSVAR(table_locks),
  MYSQL_SYSVAR(thread_concurrency),
  MYSQL_SYSVAR(thread_sleep_delay),
9019
  MYSQL_SYSVAR(autoinc_lock_mode),
9020 9021 9022
  NULL
};

9023 9024 9025
mysql_declare_plugin(innobase)
{
  MYSQL_STORAGE_ENGINE_PLUGIN,
marko's avatar
marko committed
9026
  &innobase_storage_engine,
9027 9028
  innobase_hton_name,
  "Innobase OY",
marko's avatar
marko committed
9029
  "Supports transactions, row-level locking, and foreign keys",
9030
  PLUGIN_LICENSE_GPL,
marko's avatar
marko committed
9031
  innobase_init, /* Plugin Init */
9032 9033
  NULL, /* Plugin Deinit */
  0x0100 /* 1.0 */,
marko's avatar
marko committed
9034
  innodb_status_variables_export,/* status variables             */
9035 9036
  innobase_system_variables, /* system variables */
  NULL /* reserved */
9037 9038
}
mysql_declare_plugin_end;
9039 9040 9041 9042 9043 9044 9045 9046 9047 9048 9049 9050 9051 9052 9053 9054 9055 9056

/** @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;
}