ha_innodb.cc 214 KB
Newer Older
unknown's avatar
unknown committed
1
/* Copyright (C) 2000-2005 MySQL AB & Innobase Oy
2

3 4
   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
unknown's avatar
unknown committed
5
   the Free Software Foundation; version 2 of the License.
6

7 8 9 10
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
11

12 13 14 15
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

16
/* This file defines the InnoDB handler: the interface between MySQL and InnoDB
17 18
NOTE: You can only use noninlined InnoDB functions in this file, because we
have disables the InnoDB inlining in this file. */
19

20 21
/* TODO list for the InnoDB handler in 5.0:
  - Remove the flag trx->active_trans and look at the InnoDB
22
    trx struct state field
unknown's avatar
unknown committed
23
  - fix savepoint functions to use savepoint storage area
unknown's avatar
unknown committed
24 25 26
  - 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?
27
*/
unknown's avatar
unknown committed
28

29
#ifdef USE_PRAGMA_IMPLEMENTATION
30 31 32 33
#pragma implementation				// gcc: Class implementation
#endif

#include "mysql_priv.h"
unknown's avatar
unknown committed
34
#include "slave.h"
unknown's avatar
unknown committed
35

36 37 38 39
#ifdef HAVE_INNOBASE_DB
#include <m_ctype.h>
#include <hash.h>
#include <myisampack.h>
unknown's avatar
unknown committed
40
#include <mysys_err.h>
41
#include <my_sys.h>
42

43 44
#define MAX_ULONG_BIT ((ulong) 1 << (sizeof(ulong)*8-1))

45
#include "ha_innodb.h"
unknown's avatar
unknown committed
46

unknown's avatar
unknown committed
47 48 49
pthread_mutex_t innobase_share_mutex, /* to protect innobase_open_files */
                prepare_commit_mutex; /* to force correct commit order in
				      binlog */
50 51 52 53
ulong commit_threads= 0;
pthread_mutex_t commit_threads_m;
pthread_cond_t commit_cond;
pthread_mutex_t commit_cond_m;
54
bool innodb_inited= 0;
unknown's avatar
unknown committed
55

unknown's avatar
unknown committed
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
/*-----------------------------------------------------------------*/
/* These variables are used to implement (semi-)synchronous MySQL binlog
replication for InnoDB tables. */

pthread_cond_t  innobase_repl_cond;             /* Posix cond variable;
                                                this variable is signaled
                                                when enough binlog has been
                                                sent to slave, so that a
                                                waiting trx can return the
                                                'ok' message to the client
                                                for a commit */
pthread_mutex_t innobase_repl_cond_mutex;       /* Posix cond variable mutex
                                                that also protects the next
                                                innobase_repl_... variables */
uint            innobase_repl_state;            /* 1 if synchronous replication
                                                is switched on and is working
                                                ok; else 0 */
uint            innobase_repl_file_name_inited  = 0; /* This is set to 1 when
                                                innobase_repl_file_name
                                                contains meaningful data */
char*           innobase_repl_file_name;        /* The binlog name up to which
                                                we have sent some binlog to
                                                the slave */
my_off_t        innobase_repl_pos;              /* The position in that file
                                                up to which we have sent the
                                                binlog to the slave */
uint            innobase_repl_n_wait_threads    = 0; /* This tells how many
                                                transactions currently are
                                                waiting for the binlog to be
                                                sent to the client */
uint            innobase_repl_wait_file_name_inited = 0; /* This is set to 1
                                                when we know the 'smallest'
                                                wait position */
char*           innobase_repl_wait_file_name;   /* NULL, or the 'smallest'
                                                innobase_repl_file_name that
                                                a transaction is waiting for */
my_off_t        innobase_repl_wait_pos;         /* The smallest position in
                                                that file that a trx is
                                                waiting for: the trx can
                                                proceed and send an 'ok' to
                                                the client when MySQL has sent
                                                the binlog up to this position
                                                to the slave */
/*-----------------------------------------------------------------*/



103
/* Store MySQL definition of 'byte': in Linux it is char while InnoDB
104 105 106
uses unsigned char; the header univ.i which we include next defines
'byte' as a macro which expands to 'unsigned char' */

107
typedef byte	mysql_byte;
unknown's avatar
unknown committed
108

unknown's avatar
unknown committed
109 110
#define INSIDE_HA_INNOBASE_CC

111
/* Include necessary InnoDB headers */
112
extern "C" {
unknown's avatar
unknown committed
113
#include "../innobase/include/univ.i"
unknown's avatar
unknown committed
114
#include "../innobase/include/os0file.h"
unknown's avatar
unknown committed
115
#include "../innobase/include/os0thread.h"
unknown's avatar
unknown committed
116 117 118 119
#include "../innobase/include/srv0start.h"
#include "../innobase/include/srv0srv.h"
#include "../innobase/include/trx0roll.h"
#include "../innobase/include/trx0trx.h"
unknown's avatar
unknown committed
120
#include "../innobase/include/trx0sys.h"
121
#include "../innobase/include/mtr0mtr.h"
unknown's avatar
unknown committed
122 123 124 125 126
#include "../innobase/include/row0ins.h"
#include "../innobase/include/row0mysql.h"
#include "../innobase/include/row0sel.h"
#include "../innobase/include/row0upd.h"
#include "../innobase/include/log0log.h"
127
#include "../innobase/include/lock0lock.h"
unknown's avatar
unknown committed
128 129 130
#include "../innobase/include/dict0crea.h"
#include "../innobase/include/btr0cur.h"
#include "../innobase/include/btr0btr.h"
131
#include "../innobase/include/fsp0fsp.h"
132
#include "../innobase/include/sync0sync.h"
unknown's avatar
unknown committed
133
#include "../innobase/include/fil0fil.h"
134
#include "../innobase/include/trx0xa.h"
135 136 137 138 139
}

#define HA_INNOBASE_ROWS_IN_TABLE 10000 /* to get optimization right */
#define HA_INNOBASE_RANGE_COUNT	  100

140
ulong 	innobase_large_page_size = 0;
141

142 143
/* The default values for the following, type long or longlong, start-up
parameters are declared in mysqld.cc: */
unknown's avatar
unknown committed
144

145
long innobase_mirrored_log_groups, innobase_log_files_in_group,
146 147 148 149 150 151
     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,
     innobase_open_files;

longlong innobase_buffer_pool_size, innobase_log_file_size;
unknown's avatar
unknown committed
152

unknown's avatar
unknown committed
153 154
/* The default values for the following char* start-up parameters
are determined in innobase_init below: */
unknown's avatar
foo1  
unknown committed
155

unknown's avatar
unknown committed
156
char*	innobase_data_home_dir			= NULL;
unknown's avatar
unknown committed
157
char*	innobase_data_file_path 		= NULL;
unknown's avatar
unknown committed
158
char*	innobase_log_group_home_dir		= NULL;
unknown's avatar
unknown committed
159
char*	innobase_log_arch_dir			= NULL;/* unused */
unknown's avatar
unknown committed
160 161
/* The following has a misleading name: starting from 4.0.5, this also
affects Windows: */
unknown's avatar
unknown committed
162 163 164 165 166
char*	innobase_unix_file_flush_method		= NULL;

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

167
ulong	innobase_fast_shutdown			= 1;
unknown's avatar
unknown committed
168
my_bool innobase_log_archive			= FALSE;/* unused */
169 170 171
my_bool innobase_use_doublewrite    = TRUE;
my_bool innobase_use_checksums      = TRUE;
my_bool innobase_use_large_pages    = FALSE;
unknown's avatar
unknown committed
172
my_bool	innobase_use_native_aio			= FALSE;
unknown's avatar
unknown committed
173
my_bool	innobase_file_per_table			= FALSE;
174
my_bool innobase_locks_unsafe_for_binlog        = FALSE;
175
my_bool innobase_rollback_on_timeout		= FALSE;
176
my_bool innobase_create_status_file		= FALSE;
177

unknown's avatar
unknown committed
178
static char *internal_innobase_data_file_path	= NULL;
179

180
/* The following counter is used to convey information to InnoDB
181 182 183 184 185
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
186
ulong	innobase_active_counter	= 0;
187

unknown's avatar
unknown committed
188
static HASH 	innobase_open_tables;
189

190 191 192 193
#ifdef __NETWARE__  	/* some special cleanup for NetWare */
bool nw_panic = FALSE;
#endif

194
static mysql_byte* innobase_get_key(INNOBASE_SHARE *share,uint *length,
195 196 197
			      my_bool not_used __attribute__((unused)));
static INNOBASE_SHARE *get_share(const char *table_name);
static void free_share(INNOBASE_SHARE *share);
198 199 200 201 202
static int innobase_close_connection(THD* thd);
static int innobase_commit(THD* thd, bool all);
static int innobase_rollback(THD* thd, bool all);
static int innobase_rollback_to_savepoint(THD* thd, void *savepoint);
static int innobase_savepoint(THD* thd, void *savepoint);
unknown's avatar
unknown committed
203
static int innobase_release_savepoint(THD* thd, void *savepoint);
204

205
handlerton innobase_hton = {
unknown's avatar
unknown committed
206
  "InnoDB",
207
  SHOW_OPTION_YES,
unknown's avatar
foo1  
unknown committed
208
  "Supports transactions, row-level locking, and foreign keys",
209 210
  DB_TYPE_INNODB,
  innobase_init,
211 212
  0,				/* slot */
  sizeof(trx_named_savept_t),	/* savepoint size. TODO: use it */
213 214 215
  innobase_close_connection,
  innobase_savepoint,
  innobase_rollback_to_savepoint,
unknown's avatar
unknown committed
216
  innobase_release_savepoint,
217 218 219 220 221
  innobase_commit,		/* commit */
  innobase_rollback,		/* rollback */
  innobase_xa_prepare,		/* prepare */
  innobase_xa_recover,		/* recover */
  innobase_commit_by_xid,	/* commit_by_xid */
222
  innobase_rollback_by_xid,     /* rollback_by_xid */
223 224 225 226
  innobase_create_cursor_view,
  innobase_set_cursor_view,
  innobase_close_cursor_view,
  HTON_NO_FLAGS
227
};
228

229 230 231 232 233 234 235 236
/*********************************************************************
Commits a transaction in an InnoDB database. */

void
innobase_commit_low(
/*================*/
	trx_t*	trx);	/* in: transaction handle */

237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305
struct show_var_st innodb_status_variables[]= {
  {"buffer_pool_pages_data",
  (char*) &export_vars.innodb_buffer_pool_pages_data,     SHOW_LONG},
  {"buffer_pool_pages_dirty",
  (char*) &export_vars.innodb_buffer_pool_pages_dirty,    SHOW_LONG},
  {"buffer_pool_pages_flushed",
  (char*) &export_vars.innodb_buffer_pool_pages_flushed,  SHOW_LONG},
  {"buffer_pool_pages_free",
  (char*) &export_vars.innodb_buffer_pool_pages_free,     SHOW_LONG},
  {"buffer_pool_pages_latched",
  (char*) &export_vars.innodb_buffer_pool_pages_latched,  SHOW_LONG},
  {"buffer_pool_pages_misc",
  (char*) &export_vars.innodb_buffer_pool_pages_misc,     SHOW_LONG},
  {"buffer_pool_pages_total",
  (char*) &export_vars.innodb_buffer_pool_pages_total,    SHOW_LONG},
  {"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",
  (char*) &export_vars.innodb_buffer_pool_reads,          SHOW_LONG},
  {"buffer_pool_wait_free",
  (char*) &export_vars.innodb_buffer_pool_wait_free,      SHOW_LONG},
  {"buffer_pool_write_requests",
  (char*) &export_vars.innodb_buffer_pool_write_requests, SHOW_LONG},
  {"data_fsyncs",
  (char*) &export_vars.innodb_data_fsyncs,                SHOW_LONG},
  {"data_pending_fsyncs",
  (char*) &export_vars.innodb_data_pending_fsyncs,        SHOW_LONG},
  {"data_pending_reads",
  (char*) &export_vars.innodb_data_pending_reads,         SHOW_LONG},
  {"data_pending_writes",
  (char*) &export_vars.innodb_data_pending_writes,        SHOW_LONG},
  {"data_read",
  (char*) &export_vars.innodb_data_read,                  SHOW_LONG},
  {"data_reads",
  (char*) &export_vars.innodb_data_reads,                 SHOW_LONG},
  {"data_writes",
  (char*) &export_vars.innodb_data_writes,                SHOW_LONG},
  {"data_written",
  (char*) &export_vars.innodb_data_written,               SHOW_LONG},
  {"dblwr_pages_written",
  (char*) &export_vars.innodb_dblwr_pages_written,        SHOW_LONG},
  {"dblwr_writes",
  (char*) &export_vars.innodb_dblwr_writes,               SHOW_LONG},
  {"log_waits",
  (char*) &export_vars.innodb_log_waits,                  SHOW_LONG},
  {"log_write_requests",
  (char*) &export_vars.innodb_log_write_requests,         SHOW_LONG},
  {"log_writes",
  (char*) &export_vars.innodb_log_writes,                 SHOW_LONG},
  {"os_log_fsyncs",
  (char*) &export_vars.innodb_os_log_fsyncs,              SHOW_LONG},
  {"os_log_pending_fsyncs",
  (char*) &export_vars.innodb_os_log_pending_fsyncs,      SHOW_LONG},
  {"os_log_pending_writes",
  (char*) &export_vars.innodb_os_log_pending_writes,      SHOW_LONG},
  {"os_log_written",
  (char*) &export_vars.innodb_os_log_written,             SHOW_LONG},
  {"page_size",
  (char*) &export_vars.innodb_page_size,                  SHOW_LONG},
  {"pages_created",
  (char*) &export_vars.innodb_pages_created,              SHOW_LONG},
  {"pages_read",
  (char*) &export_vars.innodb_pages_read,                 SHOW_LONG},
  {"pages_written",
  (char*) &export_vars.innodb_pages_written,              SHOW_LONG},
unknown's avatar
unknown committed
306 307 308 309 310 311
  {"row_lock_current_waits",
  (char*) &export_vars.innodb_row_lock_current_waits,     SHOW_LONG},
  {"row_lock_time",
  (char*) &export_vars.innodb_row_lock_time,              SHOW_LONGLONG},
  {"row_lock_time_avg",
  (char*) &export_vars.innodb_row_lock_time_avg,          SHOW_LONG},
unknown's avatar
unknown committed
312 313 314 315
  {"row_lock_time_max",
  (char*) &export_vars.innodb_row_lock_time_max,          SHOW_LONG},
  {"row_lock_waits",
  (char*) &export_vars.innodb_row_lock_waits,             SHOW_LONG},
316 317 318 319 320 321 322 323 324 325
  {"rows_deleted",
  (char*) &export_vars.innodb_rows_deleted,               SHOW_LONG},
  {"rows_inserted",
  (char*) &export_vars.innodb_rows_inserted,              SHOW_LONG},
  {"rows_read",
  (char*) &export_vars.innodb_rows_read,                  SHOW_LONG},
  {"rows_updated",
  (char*) &export_vars.innodb_rows_updated,               SHOW_LONG},
  {NullS, NullS, SHOW_LONG}};

326 327
/* General functions */

unknown's avatar
unknown committed
328 329 330 331 332 333 334 335 336
/**********************************************************************
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 */
{
unknown's avatar
unknown committed
337
	if (UNIV_LIKELY(!srv_thread_concurrency)) {
unknown's avatar
unknown committed
338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353

		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 */
{
unknown's avatar
unknown committed
354
	if (UNIV_LIKELY(!srv_thread_concurrency)) {
unknown's avatar
unknown committed
355 356 357 358 359 360 361

		return;
	}

	srv_conc_exit_innodb(trx);
}

unknown's avatar
unknown committed
362
/**********************************************************************
unknown's avatar
unknown committed
363
Releases possible search latch and InnoDB thread FIFO ticket. These should
unknown's avatar
unknown committed
364 365 366 367
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
unknown's avatar
unknown committed
368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383
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);
	}
}

384 385 386 387 388 389 390 391
/************************************************************************
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. */

void
innobase_release_temporary_latches(
/*===============================*/
392
        THD *thd)
393
{
unknown's avatar
unknown committed
394 395
	trx_t*	trx;

unknown's avatar
unknown committed
396
	if (!innodb_inited) {
unknown's avatar
foo1  
unknown committed
397

unknown's avatar
unknown committed
398 399 400
		return;
	}

unknown's avatar
unknown committed
401 402 403 404 405
	trx = (trx_t*) thd->ha_data[innobase_hton.slot];

	if (trx) {
        	innobase_release_stat_resources(trx);
	}
406 407
}

408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
/************************************************************************
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();
	}
}

425
/************************************************************************
unknown's avatar
unknown committed
426 427 428
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. */
429 430 431 432 433
static
int
convert_error_code_to_mysql(
/*========================*/
			/* out: MySQL error code */
unknown's avatar
unknown committed
434 435
	int	error,	/* in: InnoDB error code */
	THD*	thd)	/* in: user thread handle or NULL */
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450
{
	if (error == DB_SUCCESS) {

		return(0);

  	} else if (error == (int) DB_DUPLICATE_KEY) {

    		return(HA_ERR_FOUND_DUPP_KEY);

 	} else if (error == (int) DB_RECORD_NOT_FOUND) {

    		return(HA_ERR_NO_ACTIVE_RECORD);

 	} else if (error == (int) DB_ERROR) {

unknown's avatar
unknown committed
451
    		return(-1); /* unspecified error */
452 453

 	} else if (error == (int) DB_DEADLOCK) {
unknown's avatar
unknown committed
454
 		/* Since we rolled back the whole transaction, we must
unknown's avatar
unknown committed
455 456 457 458 459 460
 		tell it also to MySQL so that MySQL knows to empty the
 		cached binlog for this transaction */

 		if (thd) {
 			ha_rollback(thd);
 		}
461

462 463 464 465
    		return(HA_ERR_LOCK_DEADLOCK);

 	} else if (error == (int) DB_LOCK_WAIT_TIMEOUT) {

unknown's avatar
unknown committed
466 467 468
		/* 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. */
unknown's avatar
unknown committed
469

470 471 472 473
		if (thd && row_rollback_on_timeout) {
			ha_rollback(thd);
		}

unknown's avatar
unknown committed
474
   		return(HA_ERR_LOCK_WAIT_TIMEOUT);
475 476 477

 	} else if (error == (int) DB_NO_REFERENCED_ROW) {

unknown's avatar
Merge  
unknown committed
478
    		return(HA_ERR_NO_REFERENCED_ROW);
479 480 481

 	} else if (error == (int) DB_ROW_IS_REFERENCED) {

unknown's avatar
Merge  
unknown committed
482
    		return(HA_ERR_ROW_IS_REFERENCED);
483

484
        } else if (error == (int) DB_CANNOT_ADD_CONSTRAINT) {
485

unknown's avatar
Merge  
unknown committed
486
    		return(HA_ERR_CANNOT_ADD_FOREIGN);
487

unknown's avatar
unknown committed
488 489
        } else if (error == (int) DB_CANNOT_DROP_CONSTRAINT) {

unknown's avatar
unknown committed
490
    		return(HA_ERR_ROW_IS_REFERENCED); /* TODO: This is a bit
unknown's avatar
unknown committed
491 492
						misleading, a new MySQL error
						code should be introduced */
493 494
        } else if (error == (int) DB_COL_APPEARS_TWICE_IN_INDEX) {

unknown's avatar
unknown committed
495
    		return(HA_ERR_CRASHED);
496

497 498 499 500 501 502 503 504 505 506 507 508 509 510 511
 	} else if (error == (int) DB_OUT_OF_FILE_SPACE) {

    		return(HA_ERR_RECORD_FILE_FULL);

 	} else if (error == (int) DB_TABLE_IS_BEING_USED) {

    		return(HA_ERR_WRONG_COMMAND);

 	} else if (error == (int) DB_TABLE_NOT_FOUND) {

    		return(HA_ERR_KEY_NOT_FOUND);

  	} else if (error == (int) DB_TOO_BIG_RECORD) {

    		return(HA_ERR_TO_BIG_ROW);
unknown's avatar
unknown committed
512 513 514 515

  	} else if (error == (int) DB_CORRUPTION) {

    		return(HA_ERR_CRASHED);
unknown's avatar
unknown committed
516 517 518
  	} else if (error == (int) DB_NO_SAVEPOINT) {

    		return(HA_ERR_NO_SAVEPOINT);
unknown's avatar
unknown committed
519
  	} else if (error == (int) DB_LOCK_TABLE_FULL) {
unknown's avatar
unknown committed
520 521 522
 		/* 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 */
523

unknown's avatar
unknown committed
524 525 526
 		if (thd) {
 			ha_rollback(thd);
 		}
unknown's avatar
unknown committed
527 528

    		return(HA_ERR_LOCK_TABLE_FULL);
529
    	} else {
unknown's avatar
unknown committed
530
    		return(-1);			// Unknown error
531 532 533
    	}
}

534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551
/*****************************************************************
If you want to print a thd that is not associated with the current thread,
you must call this function before reserving the InnoDB kernel_mutex, to
protect MySQL from setting thd->query NULL. If you print a thd of the current
thread, we know that MySQL cannot modify thd->query, and it is not necessary
to call this. Call innobase_mysql_end_print_arbitrary_thd() after you release
the kernel_mutex.
NOTE that /mysql/innobase/lock/lock0lock.c must contain the prototype for this
function! */
extern "C"
void
innobase_mysql_prepare_print_arbitrary_thd(void)
/*============================================*/
{
	VOID(pthread_mutex_lock(&LOCK_thread_count));
}

/*****************************************************************
unknown's avatar
unknown committed
552
Releases the mutex reserved by innobase_mysql_prepare_print_arbitrary_thd().
553 554 555 556 557 558 559 560 561 562
NOTE that /mysql/innobase/lock/lock0lock.c must contain the prototype for this
function! */
extern "C"
void
innobase_mysql_end_print_arbitrary_thd(void)
/*========================================*/
{
	VOID(pthread_mutex_unlock(&LOCK_thread_count));
}

563
/*****************************************************************
564 565 566
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! */
567
extern "C"
568 569 570
void
innobase_mysql_print_thd(
/*=====================*/
571 572 573 574
	FILE*   f,		/* in: output stream */
	void*   input_thd,	/* in: pointer to a MySQL THD object */
	uint	max_query_len)	/* in: max query length to print, or 0 to
				   use the default max length */
575
{
576
	const THD*	thd;
577
        const Security_context *sctx;
578
	const char*	s;
579

580
        thd = (const THD*) input_thd;
581 582 583
        /* We probably want to have original user as part of debug output. */
        sctx = &thd->main_security_ctx;

584

585
  	fprintf(f, "MySQL thread id %lu, query id %lu",
586
		thd->thread_id, (ulong) thd->query_id);
587
	if (sctx->host) {
588
		putc(' ', f);
589
		fputs(sctx->host, f);
590
	}
591

592
	if (sctx->ip) {
593
		putc(' ', f);
594
		fputs(sctx->ip, f);
595
	}
596

597
        if (sctx->user) {
598
		putc(' ', f);
599
		fputs(sctx->user, f);
600 601
  	}

602
	if ((s = thd->proc_info)) {
603
		putc(' ', f);
604
		fputs(s, f);
605
	}
606

607
	if ((s = thd->query)) {
608 609 610 611 612 613 614 615 616 617 618
		/* 3100 is chosen because currently 3000 is the maximum
		   max_query_len we ever give this. */
		char	buf[3100];
		uint	len;

		/* If buf is too small, we dynamically allocate storage
		   in this. */
		char*	dyn_str = NULL;

		/* Points to buf or dyn_str. */
		char*	str = buf;
unknown's avatar
foo1  
unknown committed
619

620 621 622 623 624 625 626 627 628
		if (max_query_len == 0)
		{
			/* ADDITIONAL SAFETY: the default is to print at
			   most 300 chars to reduce the probability of a
			   seg fault if there is a race in
			   thd->query_length in MySQL; after May 14, 2004
			   probably no race any more, but better be
			   safe */
			max_query_len = 300;
unknown's avatar
unknown committed
629
		}
unknown's avatar
foo1  
unknown committed
630

631
		len = min(thd->query_length, max_query_len);
unknown's avatar
unknown committed
632

633 634 635 636 637 638 639 640 641
		if (len > (sizeof(buf) - 1))
		{
			dyn_str = my_malloc(len + 1, MYF(0));
			str = dyn_str;
		}

                /* Use strmake to reduce the timeframe for a race,
                   compared to fwrite() */
		len = (uint) (strmake(str, s, len) - str);
unknown's avatar
unknown committed
642
		putc('\n', f);
643 644 645 646 647 648
		fwrite(str, 1, len, f);

		if (dyn_str)
		{
			my_free(dyn_str, MYF(0));
		}
649
	}
650

651
	putc('\n', f);
652 653
}

654
/**********************************************************************
655
Get the variable length bounds of the given character set.
656 657 658 659

NOTE that the exact prototype of this function has to be in
/innobase/data/data0type.ic! */
extern "C"
660
void
661 662
innobase_get_cset_width(
/*====================*/
663 664 665
	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) */
666 667 668
{
	CHARSET_INFO*	cs;
	ut_ad(cset < 256);
669 670
	ut_ad(mbminlen);
	ut_ad(mbmaxlen);
671 672

	cs = all_charsets[cset];
673 674 675 676 677 678 679
	if (cs) {
		*mbminlen = cs->mbminlen;
		*mbmaxlen = cs->mbmaxlen;
	} else {
		ut_a(cset == 0);
		*mbminlen = *mbmaxlen = 0;
	}
680 681
}

682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
/**********************************************************************
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);
}

712 713 714 715 716 717 718 719 720
/*************************************************************************
Creates a temporary file. */
extern "C"
int
innobase_mysql_tmpfile(void)
/*========================*/
			/* out: temporary file descriptor, or < 0 on error */
{
	char	filename[FN_REFLEN];
unknown's avatar
unknown committed
721
	int	fd2 = -1;
722
	File	fd = create_temp_file(filename, mysql_tmpdir, "ib",
723 724 725 726 727 728 729
#ifdef __WIN__
				O_BINARY | O_TRUNC | O_SEQUENTIAL |
				O_TEMPORARY | O_SHORT_LIVED |
#endif /* __WIN__ */
				O_CREAT | O_EXCL | O_RDWR,
				MYF(MY_WME));
	if (fd >= 0) {
unknown's avatar
unknown committed
730 731 732 733
#ifndef __WIN__
		/* On Windows, open files cannot be removed, but files can be
		created with the O_TEMPORARY flag to the same effect
		("delete on close"). */
734 735
		unlink(filename);
#endif /* !__WIN__ */
unknown's avatar
unknown committed
736 737 738 739 740 741 742 743 744 745 746 747
		/* 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;
748 749 750 751
                        my_error(EE_OUT_OF_FILERESOURCES,
                                 MYF(ME_BELL+ME_WAITTANG),
                                 filename, my_errno);
                }
unknown's avatar
unknown committed
752 753 754
		my_close(fd, MYF(MY_WME));
	}
	return(fd2);
755 756
}

757
/*************************************************************************
758 759
Gets the InnoDB transaction handle for a MySQL handler object, creates
an InnoDB transaction struct if the corresponding MySQL thread struct still
760
lacks one. */
761
static
762 763 764
trx_t*
check_trx_exists(
/*=============*/
765
			/* out: InnoDB transaction handle */
766 767 768 769
	THD*	thd)	/* in: user thread handle */
{
	trx_t*	trx;

unknown's avatar
unknown committed
770
	ut_ad(thd == current_thd);
unknown's avatar
unknown committed
771

772
        trx = (trx_t*) thd->ha_data[innobase_hton.slot];
773 774

	if (trx == NULL) {
unknown's avatar
unknown committed
775
	        DBUG_ASSERT(thd != NULL);
776
		trx = trx_allocate_for_mysql();
777

778
		trx->mysql_thd = thd;
779 780
		trx->mysql_query_str = &(thd->query);
                trx->active_trans = 0;
781

782 783 784 785
		/* Update the info whether we should skip XA steps that eat
		CPU time */
		trx->support_xa = (ibool)(thd->variables.innodb_support_xa);

786
                thd->ha_data[innobase_hton.slot] = trx;
unknown's avatar
unknown committed
787
	} else {
unknown's avatar
unknown committed
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804
		if (trx->magic_n != TRX_MAGIC_N) {
			mem_analyze_corruption((byte*)trx);

			ut_a(0);
		}
	}

	if (thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
		trx->check_foreigns = FALSE;
	} else {
		trx->check_foreigns = TRUE;
	}

	if (thd->options & OPTION_RELAXED_UNIQUE_CHECKS) {
		trx->check_unique_secondary = FALSE;
	} else {
		trx->check_unique_secondary = TRUE;
805 806 807 808 809
	}

	return(trx);
}

810 811 812 813 814 815 816 817 818 819 820 821

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

ha_innobase::ha_innobase(TABLE *table_arg)
  :handler(&innobase_hton, table_arg),
  int_table_flags(HA_REC_NOT_IN_SEQ |
                  HA_NULL_IN_KEY |
                  HA_CAN_INDEX_BLOBS |
                  HA_CAN_SQL_HANDLER |
                  HA_NOT_EXACT_COUNT |
                  HA_PRIMARY_KEY_IN_READ_INDEX |
822
                  HA_CAN_GEOMETRY |
823 824 825 826 827
                  HA_TABLE_SCAN_ON_INDEX),
  start_of_scan(0),
  num_write_row(0)
{}

828
/*************************************************************************
829
Updates the user_thd field in a handle and also allocates a new InnoDB
830 831
transaction handle if needed, and updates the transaction fields in the
prebuilt struct. */
832
inline
833 834 835 836 837 838
int
ha_innobase::update_thd(
/*====================*/
			/* out: 0 or error code */
	THD*	thd)	/* in: thd to use the handle */
{
839 840
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	trx_t*		trx;
unknown's avatar
unknown committed
841

842 843
	trx = check_trx_exists(thd);

844
	if (prebuilt->trx != trx) {
845

846
		row_update_prebuilt_trx(prebuilt, trx);
847 848 849
	}

	user_thd = thd;
850

851 852 853
	return(0);
}

unknown's avatar
unknown committed
854
/*************************************************************************
unknown's avatar
unknown committed
855 856 857 858 859
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
unknown's avatar
unknown committed
860
void
unknown's avatar
unknown committed
861 862 863
innobase_register_stmt(
/*===================*/
	THD*	thd)	/* in: MySQL thd (connection) object */
864
{
unknown's avatar
unknown committed
865
        /* Register the statement */
unknown's avatar
unknown committed
866
        trans_register_ha(thd, FALSE, &innobase_hton);
unknown's avatar
unknown committed
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885
}

/*************************************************************************
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(
/*===========================*/
	THD*	thd)	/* in: MySQL thd (connection) object */
{
	/* NOTE that actually innobase_register_stmt() registers also
	the transaction in the AUTOCOMMIT=1 mode. */

	innobase_register_stmt(thd);
unknown's avatar
unknown committed
886

unknown's avatar
unknown committed
887 888
        if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {

unknown's avatar
unknown committed
889
              /* No autocommit mode, register for a transaction */
unknown's avatar
unknown committed
890 891
              trans_register_ha(thd, TRUE, &innobase_hton);
        }
892
}
unknown's avatar
unknown committed
893 894 895 896 897 898 899 900 901 902

/*   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
unknown's avatar
unknown committed
903
id <= INV_TRX_ID to use the query cache.
unknown's avatar
unknown committed
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946

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
unknown's avatar
unknown committed
947 948 949 950 951 952 953 954
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. */
unknown's avatar
unknown committed
955

unknown's avatar
unknown committed
956
my_bool
unknown's avatar
unknown committed
957 958 959 960 961 962 963 964 965 966 967 968
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 */
unknown's avatar
unknown committed
969
	uint	full_name_len,	/* in: length of the full name, i.e.
unknown's avatar
unknown committed
970
				len(dbname) + len(tablename) + 1 */
unknown's avatar
unknown committed
971
        ulonglong *unused)      /* unused for this engine */
unknown's avatar
unknown committed
972 973 974 975 976 977 978 979 980
{
	ibool	is_autocommit;
	trx_t*	trx;
	char	norm_name[1000];

	ut_a(full_name_len < 999);

	if (thd->variables.tx_isolation == ISO_SERIALIZABLE) {
		/* In the SERIALIZABLE mode we add LOCK IN SHARE MODE to every
unknown's avatar
unknown committed
981
		plain SELECT if AUTOCOMMIT is not on. */
unknown's avatar
foo1  
unknown committed
982

unknown's avatar
unknown committed
983 984 985
		return((my_bool)FALSE);
	}

unknown's avatar
unknown committed
986
        trx = check_trx_exists(thd);
unknown's avatar
unknown committed
987 988
	if (trx->has_search_latch) {
		ut_print_timestamp(stderr);
989 990 991
		sql_print_error("The calling thread is holding the adaptive "
				"search, latch though calling "
				"innobase_query_caching_of_table_permitted.");
992 993 994 995

		mutex_enter_noninline(&kernel_mutex);
		trx_print(stderr, trx, 1024);
		mutex_exit_noninline(&kernel_mutex);
unknown's avatar
unknown committed
996 997
	}

unknown's avatar
unknown committed
998 999 1000 1001 1002 1003 1004 1005 1006 1007
	innobase_release_stat_resources(trx);

	if (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {

		is_autocommit = TRUE;
	} else {
		is_autocommit = FALSE;

	}

unknown's avatar
unknown committed
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
	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. */
unknown's avatar
unknown committed
1026 1027 1028

		return((my_bool)TRUE);
	}
unknown's avatar
foo1  
unknown committed
1029

unknown's avatar
unknown committed
1030 1031 1032 1033 1034 1035 1036 1037
	/* 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__
1038
	innobase_casedn_str(norm_name);
unknown's avatar
unknown committed
1039
#endif
unknown's avatar
unknown committed
1040 1041 1042
	/* The call of row_search_.. will start a new transaction if it is
	not yet started */

1043 1044
        if (trx->active_trans == 0) {

unknown's avatar
unknown committed
1045
                innobase_register_trx_and_stmt(thd);
1046 1047
                trx->active_trans = 1;
        }
unknown's avatar
unknown committed
1048

unknown's avatar
unknown committed
1049 1050
	if (row_search_check_if_query_cache_permitted(trx, norm_name)) {

unknown's avatar
unknown committed
1051
		/* printf("Query cache for %s permitted\n", norm_name); */
unknown's avatar
unknown committed
1052 1053 1054 1055

		return((my_bool)TRUE);
	}

unknown's avatar
unknown committed
1056
	/* printf("Query cache for %s NOT permitted\n", norm_name); */
unknown's avatar
unknown committed
1057 1058 1059 1060 1061 1062 1063 1064

	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! */
1065
extern "C"
unknown's avatar
unknown committed
1066 1067 1068 1069 1070
void
innobase_invalidate_query_cache(
/*============================*/
	trx_t*	trx,		/* in: transaction which modifies the table */
	char*	full_name,	/* in: concatenation of database name, null
unknown's avatar
unknown committed
1071 1072 1073 1074 1075
				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 */
unknown's avatar
unknown committed
1076
{
unknown's avatar
unknown committed
1077 1078 1079 1080
	/* 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. */

unknown's avatar
unknown committed
1081
	/* Argument TRUE below means we are using transactions */
1082
#ifdef HAVE_QUERY_CACHE
unknown's avatar
unknown committed
1083 1084 1085 1086
	query_cache.invalidate((THD*)(trx->mysql_thd),
					(const char*)full_name,
					(uint32)full_name_len,
					TRUE);
1087
#endif
unknown's avatar
unknown committed
1088
}
1089 1090

/*********************************************************************
1091 1092
Get the quote character to be used in SQL identifiers.
This definition must match the one in innobase/ut/ut0ut.c! */
1093
extern "C"
1094 1095 1096
int
mysql_get_identifier_quote_char(
/*============================*/
1097
				/* out: quote character to be
1098 1099 1100 1101 1102 1103 1104 1105 1106
				used in SQL identifiers; EOF if none */
	trx_t*		trx,	/* in: transaction */
	const char*	name,	/* in: name to print */
	ulint		namelen)/* in: length of name */
{
	if (!trx || !trx->mysql_thd) {
		return(EOF);
	}
	return(get_quote_char_for_identifier((THD*) trx->mysql_thd,
unknown's avatar
unknown committed
1107
						name, (int) namelen));
1108 1109
}

1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121
/**************************************************************************
Determines if the currently running transaction has been interrupted. */
extern "C"
ibool
trx_is_interrupted(
/*===============*/
			/* out: TRUE if interrupted */
	trx_t*	trx)	/* in: transaction */
{
	return(trx && trx->mysql_thd && ((THD*) trx->mysql_thd)->killed);
}

1122 1123 1124 1125 1126 1127 1128 1129
/**************************************************************************
Obtain a pointer to the MySQL THD object, as in current_thd().  This
definition must match the one in sql/ha_innodb.cc! */
extern "C"
void*
innobase_current_thd(void)
/*======================*/
			/* out: MySQL THD object */
1130
{
1131
	return(current_thd);
unknown's avatar
unknown committed
1132 1133
}

1134 1135 1136 1137
/*********************************************************************
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,
1138
fetch next etc. This function inits the necessary things even after a
1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158
transaction commit. */

void
ha_innobase::init_table_handle_for_HANDLER(void)
/*============================================*/
{
        row_prebuilt_t* prebuilt;

        /* 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. */

        update_thd(current_thd);

        /* Initialize the prebuilt struct much like it would be inited in
        external_lock */

        prebuilt = (row_prebuilt_t*)innobase_prebuilt;

unknown's avatar
unknown committed
1159 1160
	innobase_release_stat_resources(prebuilt->trx);

1161 1162 1163 1164 1165 1166 1167 1168
        /* If the transaction is not started yet, start it */

        trx_start_if_not_started_noninline(prebuilt->trx);

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

        trx_assign_read_view(prebuilt->trx);

1169 1170
	/* Set the MySQL flag to mark that there is an active transaction */

1171 1172
        if (prebuilt->trx->active_trans == 0) {

unknown's avatar
unknown committed
1173
                innobase_register_trx_and_stmt(current_thd);
1174 1175 1176

                prebuilt->trx->active_trans = 1;
        }
1177

1178 1179 1180 1181 1182 1183 1184 1185 1186
        /* We did the necessary inits in this function, no need to repeat them
        in row_search_for_mysql */

        prebuilt->sql_stat_start = FALSE;

        /* We let HANDLER always to do the reads as consistent reads, even
        if the trx isolation level would have been specified as SERIALIZABLE */

        prebuilt->select_lock_type = LOCK_NONE;
unknown's avatar
unknown committed
1187
        prebuilt->stored_select_lock_type = LOCK_NONE;
1188 1189 1190

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

unknown's avatar
unknown committed
1191
        prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
1192 1193 1194 1195 1196

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

        prebuilt->read_just_key = FALSE;
1197 1198

	prebuilt->used_in_HANDLER = TRUE;
1199 1200

	prebuilt->keep_other_fields_on_keyread = FALSE;
1201 1202
}

1203
/*************************************************************************
1204
Opens an InnoDB database. */
1205

1206
bool
1207 1208
innobase_init(void)
/*===============*/
1209
			/* out: &innobase_hton, or NULL on error */
1210
{
unknown's avatar
unknown committed
1211
	static char	current_dir[3];		/* Set if using current lib */
1212 1213
	int		err;
	bool		ret;
1214
	char 	        *default_path;
unknown's avatar
merge  
unknown committed
1215

1216 1217
  	DBUG_ENTER("innobase_init");

1218 1219 1220
         if (have_innodb != SHOW_OPTION_YES)
           goto error;

unknown's avatar
unknown committed
1221 1222
	ut_a(DATA_MYSQL_TRUE_VARCHAR == (ulint)MYSQL_TYPE_VARCHAR);

1223 1224 1225 1226 1227 1228 1229
	/* 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");

1230
			goto error;
1231 1232 1233 1234 1235 1236 1237
		}

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

1238
			goto error;
1239 1240 1241
		}
	}

unknown's avatar
unknown committed
1242
  	os_innodb_umask = (ulint)my_umask;
unknown's avatar
unknown committed
1243

unknown's avatar
unknown committed
1244 1245 1246 1247 1248 1249
	/* 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. */

1250
	if (mysqld_embedded) {
unknown's avatar
unknown committed
1251
		default_path = mysql_real_data_home;
unknown's avatar
unknown committed
1252
		fil_path_to_mysql_datadir = mysql_real_data_home;
unknown's avatar
unknown committed
1253 1254 1255 1256 1257 1258
	} else {
	  	/* 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;
unknown's avatar
unknown committed
1259 1260
	}

unknown's avatar
unknown committed
1261 1262
	ut_a(default_path);

unknown's avatar
unknown committed
1263 1264 1265 1266 1267 1268
	if (specialflag & SPECIAL_NO_PRIOR) {
	        srv_set_thread_priorities = FALSE;
	} else {
	        srv_set_thread_priorities = TRUE;
	        srv_query_thread_priority = QUERY_PRIOR;
	}
unknown's avatar
unknown committed
1269

unknown's avatar
unknown committed
1270 1271
	/* Set InnoDB initialization parameters according to the values
	read from MySQL .cnf file */
unknown's avatar
unknown committed
1272

unknown's avatar
unknown committed
1273
	/*--------------- Data files -------------------------*/
1274

unknown's avatar
unknown committed
1275
	/* The default dir for data files is the datadir of MySQL */
unknown's avatar
unknown committed
1276 1277

	srv_data_home = (innobase_data_home_dir ? innobase_data_home_dir :
unknown's avatar
unknown committed
1278
			 default_path);
unknown's avatar
unknown committed
1279

unknown's avatar
unknown committed
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
	/* Set default InnoDB data file size to 10 MB and let it be
  	auto-extending. Thus users can use InnoDB in >= 4.0 without having
	to specify any startup options. */

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

	/* 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,
unknown's avatar
unknown committed
1292
						   MYF(MY_FAE));
unknown's avatar
unknown committed
1293 1294 1295

	ret = (bool) srv_parse_data_file_paths_and_sizes(
				internal_innobase_data_file_path,
unknown's avatar
unknown committed
1296 1297 1298 1299 1300 1301
				&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);
1302
	if (ret == FALSE) {
unknown's avatar
unknown committed
1303 1304
	  	sql_print_error(
			"InnoDB: syntax error in innodb_data_file_path");
unknown's avatar
unknown committed
1305 1306
	  	my_free(internal_innobase_data_file_path,
						MYF(MY_ALLOW_ZERO_PTR));
1307
                goto error;
unknown's avatar
unknown committed
1308
	}
1309

unknown's avatar
unknown committed
1310 1311 1312
	/* -------------- Log files ---------------------------*/

	/* The default dir for log files is the datadir of MySQL */
unknown's avatar
foo1  
unknown committed
1313

unknown's avatar
unknown committed
1314 1315 1316
	if (!innobase_log_group_home_dir) {
	  	innobase_log_group_home_dir = default_path;
	}
unknown's avatar
unknown committed
1317

unknown's avatar
foo1  
unknown committed
1318
#ifdef UNIV_LOG_ARCHIVE
unknown's avatar
unknown committed
1319 1320 1321 1322 1323 1324 1325
	/* 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;
unknown's avatar
unknown committed
1326
#endif /* UNIG_LOG_ARCHIVE */
unknown's avatar
unknown committed
1327

unknown's avatar
unknown committed
1328 1329 1330
	ret = (bool)
		srv_parse_log_group_home_dirs(innobase_log_group_home_dir,
						&srv_log_group_home_dirs);
unknown's avatar
unknown committed
1331

unknown's avatar
unknown committed
1332
	if (ret == FALSE || innobase_mirrored_log_groups != 1) {
1333 1334
	  sql_print_error("syntax error in innodb_log_group_home_dir, or a "
			  "wrong number of mirrored log groups");
unknown's avatar
unknown committed
1335

unknown's avatar
unknown committed
1336 1337
	  	my_free(internal_innobase_data_file_path,
						MYF(MY_ALLOW_ZERO_PTR));
1338
                goto error;
unknown's avatar
unknown committed
1339
	}
unknown's avatar
unknown committed
1340

unknown's avatar
unknown committed
1341 1342 1343
	/* --------------------------------------------------*/

	srv_file_flush_method_str = innobase_unix_file_flush_method;
1344

unknown's avatar
unknown committed
1345
	srv_n_log_groups = (ulint) innobase_mirrored_log_groups;
1346
	srv_n_log_files = (ulint) innobase_log_files_in_group;
unknown's avatar
unknown committed
1347 1348
	srv_log_file_size = (ulint) innobase_log_file_size;

unknown's avatar
unknown committed
1349
#ifdef UNIV_LOG_ARCHIVE
unknown's avatar
unknown committed
1350
	srv_log_archive_on = (ulint) innobase_log_archive;
unknown's avatar
unknown committed
1351
#endif /* UNIV_LOG_ARCHIVE */
unknown's avatar
unknown committed
1352
	srv_log_buffer_size = (ulint) innobase_log_buffer_size;
1353

unknown's avatar
unknown committed
1354 1355
        /* 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. */
unknown's avatar
unknown committed
1356 1357

        if (innobase_buffer_pool_awe_mem_mb == 0) {
unknown's avatar
unknown committed
1358 1359
                /* Careful here: we first convert the signed long int to ulint
                and only after that divide */
unknown's avatar
foo1  
unknown committed
1360

unknown's avatar
unknown committed
1361 1362 1363 1364 1365 1366
                srv_pool_size = ((ulint) innobase_buffer_pool_size) / 1024;
        } 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;
unknown's avatar
foo1  
unknown committed
1367

unknown's avatar
unknown committed
1368 1369 1370 1371 1372
                /* 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. */
        }
unknown's avatar
unknown committed
1373

unknown's avatar
unknown committed
1374 1375 1376
	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;

	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
1377

1378
	srv_lock_wait_timeout = (ulint) innobase_lock_wait_timeout;
unknown's avatar
Merge  
unknown committed
1379 1380
	srv_force_recovery = (ulint) innobase_force_recovery;

unknown's avatar
unknown committed
1381 1382
	srv_use_doublewrite_buf = (ibool) innobase_use_doublewrite;
	srv_use_checksums = (ibool) innobase_use_checksums;
1383

unknown's avatar
unknown committed
1384 1385
	os_use_large_pages = (ibool) innobase_use_large_pages;
	os_large_page_size = (ulint) innobase_large_page_size;
unknown's avatar
foo1  
unknown committed
1386

1387 1388
	row_rollback_on_timeout = (ibool) innobase_rollback_on_timeout;

unknown's avatar
unknown committed
1389
	srv_file_per_table = (ibool) innobase_file_per_table;
1390
        srv_locks_unsafe_for_binlog = (ibool) innobase_locks_unsafe_for_binlog;
unknown's avatar
unknown committed
1391 1392

	srv_max_n_open_files = (ulint) innobase_open_files;
1393
	srv_innodb_status = (ibool) innobase_create_status_file;
unknown's avatar
unknown committed
1394

1395
	srv_print_verbose_log = mysqld_embedded ? 0 : 1;
unknown's avatar
unknown committed
1396

unknown's avatar
unknown committed
1397
	/* Store the default charset-collation number of this MySQL
1398
	installation */
unknown's avatar
unknown committed
1399

1400
	data_mysql_default_charset_coll = (ulint)default_charset_info->number;
unknown's avatar
unknown committed
1401

1402 1403
	ut_a(DATA_MYSQL_LATIN1_SWEDISH_CHARSET_COLL ==
					my_charset_latin1.number);
1404
	ut_a(DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number);
1405

unknown's avatar
unknown committed
1406 1407 1408 1409
	/* 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. */
unknown's avatar
unknown committed
1410

1411
	ut_a(0 == strcmp((char*)my_charset_latin1.name,
unknown's avatar
unknown committed
1412 1413
						(char*)"latin1_swedish_ci"));
	memcpy(srv_latin1_ordering, my_charset_latin1.sort_order, 256);
1414

1415 1416 1417 1418 1419 1420 1421 1422
	/* Since we in this module access directly the fields of a trx
        struct, and due to different headers and flags it might happen that
	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);

unknown's avatar
unknown committed
1423
	err = innobase_start_or_create_for_mysql();
1424 1425

	if (err != DB_SUCCESS) {
unknown's avatar
unknown committed
1426 1427
	  	my_free(internal_innobase_data_file_path,
						MYF(MY_ALLOW_ZERO_PTR));
1428
                goto error;
1429
	}
unknown's avatar
unknown committed
1430 1431 1432

	(void) hash_init(&innobase_open_tables,system_charset_info, 32, 0, 0,
			 		(hash_get_key) innobase_get_key, 0, 0);
unknown's avatar
unknown committed
1433 1434
        pthread_mutex_init(&innobase_share_mutex, MY_MUTEX_INIT_FAST);
        pthread_mutex_init(&prepare_commit_mutex, MY_MUTEX_INIT_FAST);
1435 1436 1437
        pthread_mutex_init(&commit_threads_m, MY_MUTEX_INIT_FAST);
        pthread_mutex_init(&commit_cond_m, MY_MUTEX_INIT_FAST);
        pthread_cond_init(&commit_cond, NULL);
1438
	innodb_inited= 1;
unknown's avatar
unknown committed
1439 1440 1441 1442 1443 1444 1445 1446 1447

	/* If this is a replication slave and we needed to do a crash recovery,
	set the master binlog position to what InnoDB internally knew about
	how far we got transactions durable inside InnoDB. There is a
	problem here: if the user used also MyISAM tables, InnoDB might not
	know the right position for them.

	THIS DOES NOT WORK CURRENTLY because replication seems to initialize
	glob_mi also after innobase_init. */
unknown's avatar
foo1  
unknown committed
1448

unknown's avatar
unknown committed
1449 1450 1451 1452 1453 1454
/*	if (trx_sys_mysql_master_log_pos != -1) {
		ut_memcpy(glob_mi.log_file_name, trx_sys_mysql_master_log_name,
				1 + ut_strlen(trx_sys_mysql_master_log_name));
		glob_mi.pos = trx_sys_mysql_master_log_pos;
	}
*/
1455 1456 1457 1458
	DBUG_RETURN(FALSE);
error:
        have_innodb= SHOW_OPTION_DISABLED;	// If we couldn't use handler
        DBUG_RETURN(TRUE);
1459 1460 1461
}

/***********************************************************************
1462
Closes an InnoDB database. */
1463

1464
bool
1465 1466
innobase_end(void)
/*==============*/
1467
				/* out: TRUE if error */
1468
{
1469
	int	err= 0;
1470 1471 1472

	DBUG_ENTER("innobase_end");

1473 1474 1475 1476 1477
#ifdef __NETWARE__ 	/* some special cleanup for NetWare */
	if (nw_panic) {
		set_panic_flag_for_netware();
	}
#endif
unknown's avatar
unknown committed
1478
	if (innodb_inited) {
1479

1480
	        srv_fast_shutdown = (ulint) innobase_fast_shutdown;
unknown's avatar
unknown committed
1481 1482 1483 1484 1485 1486 1487
	  	innodb_inited = 0;
	  	if (innobase_shutdown_for_mysql() != DB_SUCCESS) {
	    		err = 1;
		}
	  	hash_free(&innobase_open_tables);
	  	my_free(internal_innobase_data_file_path,
						MYF(MY_ALLOW_ZERO_PTR));
unknown's avatar
unknown committed
1488 1489
                pthread_mutex_destroy(&innobase_share_mutex);
                pthread_mutex_destroy(&prepare_commit_mutex);
1490 1491 1492
                pthread_mutex_destroy(&commit_threads_m);
                pthread_mutex_destroy(&commit_cond_m);
                pthread_cond_destroy(&commit_cond);
1493
	}
1494

1495
  	DBUG_RETURN(err);
1496 1497 1498
}

/********************************************************************
unknown's avatar
unknown committed
1499 1500
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. */
1501

1502
bool
1503 1504
innobase_flush_logs(void)
/*=====================*/
1505
				/* out: TRUE if error */
1506
{
1507
  	bool 	result = 0;
1508 1509 1510

  	DBUG_ENTER("innobase_flush_logs");

unknown's avatar
unknown committed
1511
	log_buffer_flush_to_disk();
1512

1513 1514 1515 1516
  	DBUG_RETURN(result);
}

/*********************************************************************
1517
Commits a transaction in an InnoDB database. */
1518

unknown's avatar
unknown committed
1519 1520 1521 1522 1523
void
innobase_commit_low(
/*================*/
	trx_t*	trx)	/* in: transaction handle */
{
unknown's avatar
unknown committed
1524
        if (trx->conc_state == TRX_NOT_STARTED) {
unknown's avatar
unknown committed
1525

unknown's avatar
unknown committed
1526 1527
                return;
        }
unknown's avatar
unknown committed
1528

unknown's avatar
unknown committed
1529 1530 1531 1532
#ifdef HAVE_REPLICATION
        THD *thd=current_thd;

        if (thd && thd->slave_thread) {
1533
                /* Update the replication position info inside InnoDB */
unknown's avatar
unknown committed
1534

1535
                trx->mysql_master_log_file_name
1536
                                        = active_mi->rli.group_master_log_name;
unknown's avatar
unknown committed
1537 1538
                trx->mysql_master_log_pos = ((ib_longlong)
                                active_mi->rli.future_group_master_log_pos);
1539
        }
unknown's avatar
SCRUM  
unknown committed
1540
#endif /* HAVE_REPLICATION */
unknown's avatar
unknown committed
1541

unknown's avatar
unknown committed
1542
	trx_commit_for_mysql(trx);
unknown's avatar
unknown committed
1543 1544
}

1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581
/*********************************************************************
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. */

int
innobase_start_trx_and_assign_read_view(
/*====================================*/
			/* out: 0 */
	THD*	thd)	/* in: MySQL thread handle of the user for whom
			the transaction should be committed */
{
	trx_t*	trx;

  	DBUG_ENTER("innobase_start_trx_and_assign_read_view");

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

	trx = check_trx_exists(thd);

	/* 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 */

1582 1583
        if (trx->active_trans == 0) {

unknown's avatar
unknown committed
1584
                innobase_register_trx_and_stmt(current_thd);
1585 1586 1587

                trx->active_trans = 1;
        }
1588 1589 1590 1591

	DBUG_RETURN(0);
}

unknown's avatar
unknown committed
1592
/*********************************************************************
unknown's avatar
unknown committed
1593 1594
Commits a transaction in an InnoDB database or marks an SQL statement
ended. */
unknown's avatar
unknown committed
1595 1596
static
int
1597 1598
innobase_commit(
/*============*/
unknown's avatar
unknown committed
1599
			/* out: 0 */
unknown's avatar
unknown committed
1600
	THD*	thd,	/* in: MySQL thread handle of the user for whom
1601
			the transaction should be committed */
1602 1603
        bool    all)    /* in: TRUE - commit transaction
                               FALSE - the current SQL statement ended */
1604
{
1605
	trx_t*		trx;
1606 1607 1608 1609

  	DBUG_ENTER("innobase_commit");
  	DBUG_PRINT("trans", ("ending transaction"));

unknown's avatar
unknown committed
1610
	trx = check_trx_exists(thd);
1611

1612 1613 1614
	/* Update the info whether we should skip XA steps that eat CPU time */
	trx->support_xa = (ibool)(thd->variables.innodb_support_xa);

unknown's avatar
unknown committed
1615 1616 1617
	/* 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. */
unknown's avatar
unknown committed
1618

1619 1620 1621
        if (trx->has_search_latch) {
                          trx_search_latch_release_if_reserved(trx);
        }
unknown's avatar
foo1  
unknown committed
1622

1623
        /* The flag trx->active_trans is set to 1 in
unknown's avatar
unknown committed
1624 1625 1626

	1. ::external_lock(),
	2. ::start_stmt(),
1627
	3. innobase_query_caching_of_table_permitted(),
unknown's avatar
unknown committed
1628
	4. innobase_savepoint(),
1629
	5. ::init_table_handle_for_HANDLER(),
1630 1631
	6. innobase_start_trx_and_assign_read_view(),
	7. ::transactional_table_lock()
unknown's avatar
unknown committed
1632 1633 1634 1635 1636

	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. */
unknown's avatar
unknown committed
1637

1638
        if (trx->active_trans == 0
unknown's avatar
unknown committed
1639
	    && trx->conc_state != TRX_NOT_STARTED) {
unknown's avatar
foo1  
unknown committed
1640

1641 1642
	  sql_print_error("trx->active_trans == 0, but trx->conc_state != "
			  "TRX_NOT_STARTED");
unknown's avatar
unknown committed
1643
	}
unknown's avatar
unknown committed
1644 1645
        if (all
	    || (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {
unknown's avatar
foo1  
unknown committed
1646

1647
 		/* We were instructed to commit the whole transaction, or
unknown's avatar
unknown committed
1648 1649
		this is an SQL statement end and autocommit is on */

unknown's avatar
unknown committed
1650
                /* We need current binlog position for ibbackup to work.
unknown's avatar
unknown committed
1651
                Note, the position is current because of prepare_commit_mutex */
1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666
retry:
                if (srv_commit_concurrency > 0)
                {
                  pthread_mutex_lock(&commit_cond_m);
                  commit_threads++;
                  if (commit_threads > srv_commit_concurrency)
                  {
                    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);
                }
unknown's avatar
foo1  
unknown committed
1667

unknown's avatar
unknown committed
1668 1669 1670 1671
                trx->mysql_log_file_name = mysql_bin_log.get_log_fname();
                trx->mysql_log_offset =
                        (ib_longlong)mysql_bin_log.get_log_file()->pos_in_file;

unknown's avatar
unknown committed
1672
		innobase_commit_low(trx);
unknown's avatar
unknown committed
1673

1674 1675 1676 1677 1678 1679 1680
                if (srv_commit_concurrency > 0)
                {
                  pthread_mutex_lock(&commit_cond_m);
                  commit_threads--;
                  pthread_cond_signal(&commit_cond);
                  pthread_mutex_unlock(&commit_cond_m);
                }
unknown's avatar
foo1  
unknown committed
1681

unknown's avatar
unknown committed
1682 1683 1684 1685
                if (trx->active_trans == 2) {

                        pthread_mutex_unlock(&prepare_commit_mutex);
                }
unknown's avatar
foo1  
unknown committed
1686

1687
                trx->active_trans = 0;
unknown's avatar
foo1  
unknown committed
1688

unknown's avatar
unknown committed
1689
	} else {
unknown's avatar
unknown committed
1690 1691 1692
	        /* We just mark the SQL statement ended and do not do a
		transaction commit */

unknown's avatar
unknown committed
1693 1694 1695
		if (trx->auto_inc_lock) {
			/* If we had reserved the auto-inc lock for some
			table in this SQL statement we release it now */
unknown's avatar
foo1  
unknown committed
1696

unknown's avatar
unknown committed
1697 1698 1699 1700 1701 1702 1703
			row_unlock_table_autoinc_for_mysql(trx);
		}
		/* 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);
unknown's avatar
unknown committed
1704
	}
1705

unknown's avatar
unknown committed
1706 1707
	/* Tell the InnoDB server that there might be work for utility
	threads: */
1708 1709
        if (trx->declared_to_be_inside_innodb) {
                          /* Release our possible ticket in the FIFO */
1710

1711 1712
                          srv_conc_force_exit_innodb(trx);
        }
1713 1714
	srv_active_wake_master_thread();

unknown's avatar
unknown committed
1715
	DBUG_RETURN(0);
1716 1717
}

unknown's avatar
unknown committed
1718
/* TODO: put the
unknown's avatar
unknown committed
1719 1720
MySQL-4.1 functionality back to 5.0. This is needed to get InnoDB Hot Backup
to work. */
unknown's avatar
unknown committed
1721

1722 1723 1724 1725
/*********************************************************************
This is called when MySQL writes the binlog entry for the current
transaction. Writes to the InnoDB tablespace info which tells where the
MySQL binlog entry for the current transaction ended. Also commits the
unknown's avatar
unknown committed
1726
transaction inside InnoDB but does NOT flush InnoDB log files to disk.
unknown's avatar
unknown committed
1727
To flush you have to call innobase_commit_complete(). We have separated
unknown's avatar
unknown committed
1728 1729
flushing to eliminate the bottleneck of LOCK_log in log.cc which disabled
InnoDB's group commit capability. */
1730 1731 1732 1733

int
innobase_report_binlog_offset_and_commit(
/*=====================================*/
unknown's avatar
unknown committed
1734
                                /* out: 0 */
1735
        THD*    thd,            /* in: user thread */
unknown's avatar
unknown committed
1736
        void*   trx_handle,     /* in: InnoDB trx handle */
1737 1738
        char*   log_file_name,  /* in: latest binlog file name */
        my_off_t end_offset)    /* in: the offset in the binlog file
unknown's avatar
unknown committed
1739
                                   up to which we wrote */
1740
{
unknown's avatar
unknown committed
1741 1742 1743
	trx_t*	trx;

	trx = (trx_t*)trx_handle;
1744

unknown's avatar
unknown committed
1745 1746
	ut_a(trx != NULL);

unknown's avatar
unknown committed
1747
	trx->mysql_log_file_name = log_file_name;
unknown's avatar
unknown committed
1748
	trx->mysql_log_offset = (ib_longlong)end_offset;
unknown's avatar
unknown committed
1749

unknown's avatar
unknown committed
1750 1751
	trx->flush_log_later = TRUE;

unknown's avatar
unknown committed
1752
	innobase_commit(thd, TRUE);
unknown's avatar
unknown committed
1753 1754 1755 1756 1757 1758

	trx->flush_log_later = FALSE;

	return(0);
}

unknown's avatar
unknown committed
1759
#if 0
1760 1761 1762
/***********************************************************************
This function stores the binlog offset and flushes logs. */

unknown's avatar
unknown committed
1763
void
1764 1765 1766
innobase_store_binlog_offset_and_flush_log(
/*=======================================*/
    char *binlog_name,          /* in: binlog name */
unknown's avatar
unknown committed
1767
    longlong	offset)		/* in: binlog offset */
1768 1769
{
	mtr_t mtr;
unknown's avatar
unknown committed
1770

1771 1772 1773
	assert(binlog_name != NULL);

	/* Start a mini-transaction */
unknown's avatar
unknown committed
1774
        mtr_start_noninline(&mtr);
1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785

	/* Update the latest MySQL binlog name and offset info
        in trx sys header */

        trx_sys_update_mysql_binlog_offset(
            binlog_name,
            offset,
            TRX_SYS_MYSQL_LOG_INFO, &mtr);

        /* Commits the mini-transaction */
        mtr_commit(&mtr);
unknown's avatar
unknown committed
1786

unknown's avatar
unknown committed
1787
	/* Synchronous flush of the log buffer to disk */
1788 1789 1790 1791
	log_buffer_flush_to_disk();
}
#endif

unknown's avatar
unknown committed
1792 1793 1794 1795 1796 1797 1798 1799
/*********************************************************************
This is called after MySQL has written the binlog entry for the current
transaction. Flushes the InnoDB log files to disk if required. */

int
innobase_commit_complete(
/*=====================*/
                                /* out: 0 */
1800
        THD*    thd)            /* in: user thread */
unknown's avatar
unknown committed
1801 1802 1803
{
	trx_t*	trx;

1804
        trx = (trx_t*) thd->ha_data[innobase_hton.slot];
unknown's avatar
unknown committed
1805

1806
        if (trx && trx->active_trans) {
unknown's avatar
unknown committed
1807

unknown's avatar
unknown committed
1808
                trx->active_trans = 0;
unknown's avatar
unknown committed
1809

unknown's avatar
unknown committed
1810
                if (UNIV_UNLIKELY(srv_flush_log_at_trx_commit == 0)) {
unknown's avatar
unknown committed
1811

unknown's avatar
unknown committed
1812 1813
                        return(0);
                }
unknown's avatar
unknown committed
1814

unknown's avatar
unknown committed
1815
                trx_commit_complete_for_mysql(trx);
1816
        }
unknown's avatar
unknown committed
1817 1818

	return(0);
1819 1820
}

unknown's avatar
unknown committed
1821
/*********************************************************************
unknown's avatar
unknown committed
1822
Rolls back a transaction or the latest SQL statement. */
1823

1824
static int
1825 1826 1827
innobase_rollback(
/*==============*/
			/* out: 0 or error number */
unknown's avatar
unknown committed
1828
	THD*	thd,	/* in: handle to the MySQL thread of the user
1829
			whose transaction should be rolled back */
1830 1831
        bool    all)    /* in: TRUE - commit transaction
                               FALSE - the current SQL statement ended */
1832 1833
{
	int	error = 0;
1834
	trx_t*	trx;
1835

1836 1837 1838
	DBUG_ENTER("innobase_rollback");
	DBUG_PRINT("trans", ("aborting transaction"));

1839
	trx = check_trx_exists(thd);
1840

1841 1842 1843
	/* Update the info whether we should skip XA steps that eat CPU time */
	trx->support_xa = (ibool)(thd->variables.innodb_support_xa);

unknown's avatar
unknown committed
1844 1845 1846 1847 1848 1849
	/* 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);

unknown's avatar
unknown committed
1850
        if (trx->auto_inc_lock) {
unknown's avatar
unknown committed
1851 1852 1853
		/* 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 */
unknown's avatar
foo1  
unknown committed
1854

unknown's avatar
unknown committed
1855 1856 1857
		row_unlock_table_autoinc_for_mysql(trx);
	}

unknown's avatar
unknown committed
1858 1859
        if (all
	    || (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {
unknown's avatar
Merge  
unknown committed
1860

1861
		error = trx_rollback_for_mysql(trx);
1862
                trx->active_trans = 0;
unknown's avatar
unknown committed
1863
	} else {
1864
		error = trx_rollback_last_sql_stat_for_mysql(trx);
unknown's avatar
unknown committed
1865
	}
1866

unknown's avatar
unknown committed
1867 1868 1869
	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893
/*********************************************************************
Rolls back a transaction */

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);

        if (trx->auto_inc_lock) {
		/* 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 */
unknown's avatar
foo1  
unknown committed
1894

1895 1896 1897 1898 1899 1900 1901 1902
		row_unlock_table_autoinc_for_mysql(trx);
	}

	error = trx_rollback_for_mysql(trx);

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

unknown's avatar
unknown committed
1903 1904 1905
/*********************************************************************
Rolls back a transaction to a savepoint. */

1906
static int
unknown's avatar
unknown committed
1907 1908 1909 1910 1911 1912
innobase_rollback_to_savepoint(
/*===========================*/
				/* out: 0 if success, HA_ERR_NO_SAVEPOINT if
				no savepoint with the given name */
	THD*	thd,		/* in: handle to the MySQL thread of the user
				whose transaction should be rolled back */
1913
        void *savepoint)        /* in: savepoint data */
unknown's avatar
unknown committed
1914 1915 1916 1917
{
	ib_longlong mysql_binlog_cache_pos;
	int	    error = 0;
	trx_t*	    trx;
unknown's avatar
unknown committed
1918
        char 	    name[64];
unknown's avatar
unknown committed
1919 1920 1921 1922 1923

	DBUG_ENTER("innobase_rollback_to_savepoint");

	trx = check_trx_exists(thd);

unknown's avatar
unknown committed
1924 1925 1926
	/* 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. */
unknown's avatar
unknown committed
1927 1928

	innobase_release_stat_resources(trx);
unknown's avatar
unknown committed
1929

1930
        /* TODO: use provided savepoint data area to store savepoint data */
unknown's avatar
unknown committed
1931

unknown's avatar
unknown committed
1932
        longlong2str((ulint)savepoint, name, 36);
1933

unknown's avatar
unknown committed
1934
        error = (int) trx_rollback_to_savepoint_for_mysql(trx, name,
unknown's avatar
unknown committed
1935
						&mysql_binlog_cache_pos);
unknown's avatar
unknown committed
1936
	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
1937 1938
}

unknown's avatar
unknown committed
1939 1940
/*********************************************************************
Release transaction savepoint name. */
unknown's avatar
unknown committed
1941 1942
static
int
unknown's avatar
unknown committed
1943
innobase_release_savepoint(
unknown's avatar
unknown committed
1944
/*=======================*/
unknown's avatar
unknown committed
1945 1946 1947 1948
				/* out: 0 if success, HA_ERR_NO_SAVEPOINT if
				no savepoint with the given name */
	THD*	thd,		/* in: handle to the MySQL thread of the user
				whose transaction should be rolled back */
unknown's avatar
unknown committed
1949
        void*	savepoint)      /* in: savepoint data */
unknown's avatar
unknown committed
1950 1951 1952
{
	int	    error = 0;
	trx_t*	    trx;
unknown's avatar
unknown committed
1953
        char 	    name[64];
unknown's avatar
unknown committed
1954

unknown's avatar
unknown committed
1955
	DBUG_ENTER("innobase_release_savepoint");
unknown's avatar
unknown committed
1956 1957 1958

	trx = check_trx_exists(thd);

unknown's avatar
unknown committed
1959
        /* TODO: use provided savepoint data area to store savepoint data */
unknown's avatar
unknown committed
1960

unknown's avatar
unknown committed
1961
        longlong2str((ulint)savepoint, name, 36);
1962

unknown's avatar
unknown committed
1963
	error = (int) trx_release_savepoint_for_mysql(trx, name);
unknown's avatar
unknown committed
1964 1965 1966 1967

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

1968
/*********************************************************************
unknown's avatar
unknown committed
1969
Sets a transaction savepoint. */
unknown's avatar
unknown committed
1970 1971
static
int
unknown's avatar
unknown committed
1972 1973 1974 1975
innobase_savepoint(
/*===============*/
				/* out: always 0, that is, always succeeds */
	THD*	thd,		/* in: handle to the MySQL thread */
unknown's avatar
unknown committed
1976
        void*	savepoint)      /* in: savepoint data */
unknown's avatar
unknown committed
1977 1978 1979 1980 1981 1982
{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_savepoint");

1983 1984 1985 1986 1987 1988 1989
        /*
          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.
        */
        DBUG_ASSERT(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) ||
                    thd->in_sub_stmt);
unknown's avatar
unknown committed
1990 1991 1992

	trx = check_trx_exists(thd);

unknown's avatar
unknown committed
1993 1994 1995 1996 1997 1998
	/* 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);

1999 2000
        /* cannot happen outside of transaction */
        DBUG_ASSERT(trx->active_trans);
unknown's avatar
unknown committed
2001

2002
        /* TODO: use provided savepoint data area to store savepoint data */
2003
        char name[64];
unknown's avatar
unknown committed
2004
        longlong2str((ulint)savepoint,name,36);
2005

unknown's avatar
unknown committed
2006
        error = (int) trx_savepoint_for_mysql(trx, name, (ib_longlong)0);
unknown's avatar
unknown committed
2007 2008 2009 2010

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

2011
/*********************************************************************
unknown's avatar
unknown committed
2012
Frees a possible InnoDB trx object associated with the current THD. */
unknown's avatar
unknown committed
2013 2014
static
int
2015 2016
innobase_close_connection(
/*======================*/
unknown's avatar
unknown committed
2017 2018
			/* out: 0 or error number */
	THD*	thd)	/* in: handle to the MySQL thread of the user
2019
			whose resources should be free'd */
2020
{
unknown's avatar
unknown committed
2021 2022 2023 2024 2025 2026
	trx_t*	trx;

	trx = (trx_t*)thd->ha_data[innobase_hton.slot];

	ut_a(trx);

2027 2028
        if (trx->active_trans == 0
	    && trx->conc_state != TRX_NOT_STARTED) {
unknown's avatar
foo1  
unknown committed
2029

2030 2031
	  sql_print_error("trx->active_trans == 0, but trx->conc_state != "
			  "TRX_NOT_STARTED");
2032 2033 2034
	}


2035 2036 2037 2038 2039 2040
	if (trx->conc_state != TRX_NOT_STARTED &&
            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);
unknown's avatar
unknown committed
2041 2042 2043 2044 2045

	innobase_rollback_trx(trx);

        trx_free_for_mysql(trx);

unknown's avatar
unknown committed
2046
	return(0);
2047
}
2048 2049 2050


/*****************************************************************************
2051
** InnoDB database tables
2052 2053
*****************************************************************************/

2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
/********************************************************************
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 */
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;

	if (prebuilt && prebuilt->table) {
		if (prebuilt->table->comp) {
			return(ROW_TYPE_COMPACT);
		} else {
			return(ROW_TYPE_REDUNDANT);
		}
	}
	ut_ad(0);
	return(ROW_TYPE_NOT_USED);
}

2074
/********************************************************************
unknown's avatar
unknown committed
2075
Gives the file extension of an InnoDB single-table tablespace. */
unknown's avatar
unknown committed
2076 2077 2078 2079
static const char* ha_innobase_exts[] = {
  ".ibd",
  NullS
};
2080 2081 2082 2083

const char**
ha_innobase::bas_ext() const
/*========================*/
unknown's avatar
unknown committed
2084
				/* out: file extension string */
2085
{
unknown's avatar
unknown committed
2086
  return ha_innobase_exts;
2087 2088
}

unknown's avatar
unknown committed
2089

2090 2091 2092
/*********************************************************************
Normalizes a table name string. A normalized name consists of the
database name catenated to '/' and table name. An example:
unknown's avatar
unknown committed
2093 2094
test/mytable. On Windows normalization puts both the database name and the
table name always to lower case. */
2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108
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 */

unknown's avatar
unknown committed
2109
	ptr = strend(name)-1;
2110 2111 2112 2113 2114 2115 2116

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

	name_ptr = ptr + 1;

unknown's avatar
unknown committed
2117
	DBUG_ASSERT(ptr > name);
2118 2119

	ptr--;
2120

2121 2122 2123 2124 2125 2126 2127 2128 2129
	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] = '/';
unknown's avatar
unknown committed
2130 2131

#ifdef __WIN__
unknown's avatar
unknown committed
2132
	innobase_casedn_str(norm_name);
unknown's avatar
unknown committed
2133
#endif
2134
}
2135

2136
/*********************************************************************
unknown's avatar
unknown committed
2137
Creates and opens a handle to a table which already exists in an InnoDB
2138 2139 2140 2141 2142 2143 2144 2145
database. */

int
ha_innobase::open(
/*==============*/
					/* out: 1 if error, 0 if success */
	const char*	name,		/* in: table name */
	int 		mode,		/* in: not used */
unknown's avatar
unknown committed
2146
	uint 		test_if_locked)	/* in: not used */
2147
{
2148 2149
	dict_table_t*	ib_table;
  	char		norm_name[1000];
2150
	THD*		thd;
2151 2152 2153 2154 2155 2156

	DBUG_ENTER("ha_innobase::open");

	UT_NOT_USED(mode);
	UT_NOT_USED(test_if_locked);

2157
	thd = current_thd;
2158 2159
	normalize_table_name(norm_name, name);

2160 2161
	user_thd = NULL;

unknown's avatar
unknown committed
2162 2163
	last_query_id = (ulong)-1;

unknown's avatar
unknown committed
2164 2165 2166 2167
	if (!(share=get_share(name))) {

		DBUG_RETURN(1);
	}
2168

2169 2170 2171 2172
	/* 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. */
2173

unknown's avatar
unknown committed
2174 2175
	upd_and_key_val_buff_len =
				table->s->reclength + table->s->max_key_length
2176
							+ MAX_REF_PARTS * 3;
2177
	if (!(mysql_byte*) my_multi_malloc(MYF(MY_WME),
unknown's avatar
unknown committed
2178 2179
				     &upd_buff, upd_and_key_val_buff_len,
				     &key_val_buff, upd_and_key_val_buff_len,
2180
				     NullS)) {
2181
	  	free_share(share);
unknown's avatar
unknown committed
2182

2183
	  	DBUG_RETURN(1);
2184 2185
  	}

2186
	/* Get pointer to a table object in InnoDB dictionary cache */
2187

2188 2189 2190
	ib_table = dict_table_get_and_increment_handle_count(
				      		     norm_name, NULL);
 	if (NULL == ib_table) {
unknown's avatar
unknown committed
2191
	        ut_print_timestamp(stderr);
2192 2193 2194 2195 2196 2197 2198
		sql_print_error("Cannot find table %s from the internal data "
				"dictionary\nof InnoDB though the .frm file "
				"for the table exists. Maybe you\nhave "
				"deleted and recreated InnoDB data files but "
				"have forgotten\nto delete the corresponding "
				".frm files of InnoDB tables, or you\n"
				"have moved .frm files to another database?\n"
unknown's avatar
unknown committed
2199
				"See http://dev.mysql.com/doc/refman/5.0/en/innodb-troubleshooting.html\n"
2200 2201
				"how you can resolve the problem.\n",
				norm_name);
unknown's avatar
unknown committed
2202
	        free_share(share);
unknown's avatar
unknown committed
2203
    		my_free((gptr) upd_buff, MYF(0));
unknown's avatar
unknown committed
2204
    		my_errno = ENOENT;
2205

2206
    		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
unknown's avatar
unknown committed
2207 2208
  	}

2209
 	if (ib_table->ibd_file_missing && !thd->tablespace_op) {
unknown's avatar
unknown committed
2210
	        ut_print_timestamp(stderr);
2211 2212 2213 2214 2215
		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"
unknown's avatar
unknown committed
2216
				"See http://dev.mysql.com/doc/refman/5.0/en/innodb-troubleshooting.html\n"
2217 2218
				"how you can resolve the problem.\n",
				norm_name);
2219
	        free_share(share);
unknown's avatar
unknown committed
2220
    		my_free((gptr) upd_buff, MYF(0));
2221
    		my_errno = ENOENT;
unknown's avatar
unknown committed
2222

unknown's avatar
unknown committed
2223
		dict_table_decrement_handle_count(ib_table);
2224
    		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
2225 2226
  	}

2227
	innobase_prebuilt = row_create_prebuilt(ib_table);
2228

unknown's avatar
unknown committed
2229 2230
	((row_prebuilt_t*)innobase_prebuilt)->mysql_row_len =
							table->s->reclength;
2231

unknown's avatar
unknown committed
2232 2233
	/* Looks like MySQL-3.23 sometimes has primary key number != 0 */

2234
 	primary_key = table->s->primary_key;
unknown's avatar
unknown committed
2235
	key_used_on_scan = primary_key;
2236

unknown's avatar
unknown committed
2237 2238 2239 2240 2241
	/* Allocate a buffer for a 'row reference'. A row reference is
	a string of bytes of length ref_length which uniquely specifies
        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! */
2242

unknown's avatar
unknown committed
2243
  	if (!row_table_got_default_clust_index(ib_table)) {
unknown's avatar
unknown committed
2244
	        if (primary_key >= MAX_KEY) {
2245 2246
		  sql_print_error("Table %s has a primary key in InnoDB data "
				  "dictionary, but not in MySQL!", name);
unknown's avatar
unknown committed
2247
		}
2248 2249 2250

		((row_prebuilt_t*)innobase_prebuilt)
				->clust_index_was_generated = FALSE;
unknown's avatar
unknown committed
2251 2252 2253 2254 2255
 		/* MySQL allocates the buffer for ref. key_info->key_length
		includes space for all key columns + one byte for each column
		that may be NULL. ref_length must be as exact as possible to
		save space, because all row reference buffers are allocated
		based on ref_length. */
unknown's avatar
foo1  
unknown committed
2256

unknown's avatar
unknown committed
2257
  		ref_length = table->key_info[primary_key].key_length;
2258
	} else {
unknown's avatar
unknown committed
2259
	        if (primary_key != MAX_KEY) {
2260 2261 2262 2263 2264 2265 2266 2267 2268
		  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);
unknown's avatar
unknown committed
2269 2270
		}

2271 2272 2273
		((row_prebuilt_t*)innobase_prebuilt)
				->clust_index_was_generated = TRUE;

unknown's avatar
unknown committed
2274
  		ref_length = DATA_ROW_ID_LEN;
unknown's avatar
unknown committed
2275

unknown's avatar
unknown committed
2276 2277 2278 2279 2280 2281 2282
		/* 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. */
unknown's avatar
foo1  
unknown committed
2283

unknown's avatar
unknown committed
2284
		if (key_used_on_scan != MAX_KEY) {
2285 2286 2287
		  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);
unknown's avatar
unknown committed
2288
		}
2289
	}
2290

unknown's avatar
unknown committed
2291 2292 2293
	block_size = 16 * 1024;	/* Index block size in InnoDB: used by MySQL
				in query optimization */

unknown's avatar
Merge  
unknown committed
2294
	/* Init table lock structure */
2295
	thr_lock_data_init(&share->lock,&lock,(void*) 0);
2296 2297

  	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
2298

2299 2300 2301
  	DBUG_RETURN(0);
}

2302 2303 2304 2305 2306 2307
uint
ha_innobase::max_supported_key_part_length() const
{
	return(DICT_MAX_INDEX_COL_LEN - 1);
}

2308
/**********************************************************************
2309
Closes a handle to an InnoDB table. */
2310 2311 2312 2313

int
ha_innobase::close(void)
/*====================*/
2314
				/* out: 0 */
2315 2316 2317 2318 2319
{
  	DBUG_ENTER("ha_innobase::close");

	row_prebuilt_free((row_prebuilt_t*) innobase_prebuilt);

unknown's avatar
unknown committed
2320
    	my_free((gptr) upd_buff, MYF(0));
2321 2322
        free_share(share);

2323
	/* Tell InnoDB server that there might be work for
2324 2325 2326 2327 2328 2329 2330
	utility threads: */

	srv_active_wake_master_thread();

  	DBUG_RETURN(0);
}

unknown's avatar
unknown committed
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394
/* 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 */
{
	return((uint) (field->ptr - (char*) table->record[0]));
}

/******************************************************************
Checks if a field in a record is SQL NULL. Uses the record format
information in table to track the null bit in record. */
inline
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;
}

2395 2396
extern "C" {
/*****************************************************************
unknown's avatar
unknown committed
2397 2398 2399 2400
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! */
2401 2402 2403

int
innobase_mysql_cmp(
2404
/*===============*/
2405 2406
					/* out: 1, 0, -1, if a is greater,
					equal, less than b, respectively */
2407
	int		mysql_type,	/* in: MySQL type */
unknown's avatar
unknown committed
2408
	uint		charset_number,	/* in: number of the charset */
2409 2410 2411 2412 2413 2414 2415
	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 */
{
unknown's avatar
unknown committed
2416
	CHARSET_INFO*		charset;
2417
	enum_field_types	mysql_tp;
2418
	int                     ret;
2419

unknown's avatar
unknown committed
2420 2421
	DBUG_ASSERT(a_length != UNIV_SQL_NULL);
	DBUG_ASSERT(b_length != UNIV_SQL_NULL);
2422 2423 2424 2425 2426

	mysql_tp = (enum_field_types) mysql_type;

	switch (mysql_tp) {

2427
        case MYSQL_TYPE_BIT:
2428
	case MYSQL_TYPE_STRING:
2429
	case MYSQL_TYPE_VAR_STRING:
unknown's avatar
unknown committed
2430 2431 2432 2433
	case FIELD_TYPE_TINY_BLOB:
	case FIELD_TYPE_MEDIUM_BLOB:
	case FIELD_TYPE_BLOB:
	case FIELD_TYPE_LONG_BLOB:
2434
        case MYSQL_TYPE_VARCHAR:
unknown's avatar
unknown committed
2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447
		/* 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) {
2448 2449 2450 2451
			  sql_print_error("InnoDB needs charset %lu for doing "
					  "a comparison, but MySQL cannot "
					  "find that charset.",
					  (ulong) charset_number);
unknown's avatar
unknown committed
2452 2453 2454 2455
				ut_a(0);
			}
		}

unknown's avatar
unknown committed
2456 2457 2458 2459 2460 2461
                /* 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! */

                ret = charset->coll->strnncollsp(charset,
unknown's avatar
unknown committed
2462
                                  a, a_length,
2463
                                                 b, b_length, 0);
2464
		if (ret < 0) {
2465
		        return(-1);
2466
		} else if (ret > 0) {
2467
		        return(1);
2468
		} else {
2469
		        return(0);
2470
	        }
2471 2472 2473 2474 2475 2476 2477 2478 2479
	default:
		assert(0);
	}

	return(0);
}
}

/******************************************************************
unknown's avatar
unknown committed
2480 2481 2482
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'. */
2483 2484
inline
ulint
2485 2486
get_innobase_type_from_mysql_type(
/*==============================*/
unknown's avatar
unknown committed
2487 2488 2489 2490 2491
				/* 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 */
2492
{
unknown's avatar
unknown committed
2493 2494 2495
	/* 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 */
2496

unknown's avatar
unknown committed
2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523
	DBUG_ASSERT((ulint)FIELD_TYPE_STRING < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_VAR_STRING < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_DOUBLE < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_FLOAT < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_DECIMAL < 256);

	if (field->flags & UNSIGNED_FLAG) {

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

	if (field->real_type() == FIELD_TYPE_ENUM
	    || field->real_type() == FIELD_TYPE_SET) {

		/* 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);
	}

2524
	switch (field->type()) {
unknown's avatar
unknown committed
2525 2526
	        /* NOTE that we only allow string types in DATA_MYSQL
		and DATA_VARMYSQL */
unknown's avatar
unknown committed
2527 2528 2529
                case MYSQL_TYPE_VAR_STRING: /* old <= 4.1 VARCHAR */
                case MYSQL_TYPE_VARCHAR:    /* new >= 5.0.3 true VARCHAR */
					if (field->binary()) {
2530 2531
						return(DATA_BINARY);
					} else if (strcmp(
unknown's avatar
unknown committed
2532 2533
						  field->charset()->name,
						 "latin1_swedish_ci") == 0) {
2534
						return(DATA_VARCHAR);
2535 2536
					} else {
						return(DATA_VARMYSQL);
2537
					}
2538
                case MYSQL_TYPE_BIT:
2539
		case MYSQL_TYPE_STRING: if (field->binary()) {
2540 2541 2542

						return(DATA_FIXBINARY);
					} else if (strcmp(
unknown's avatar
unknown committed
2543 2544
						   field->charset()->name,
						   "latin1_swedish_ci") == 0) {
2545
						return(DATA_CHAR);
2546 2547
					} else {
						return(DATA_MYSQL);
2548
					}
unknown's avatar
unknown committed
2549
                case FIELD_TYPE_NEWDECIMAL:
unknown's avatar
unknown committed
2550
                                        return(DATA_FIXBINARY);
2551 2552 2553 2554 2555 2556 2557 2558 2559
		case FIELD_TYPE_LONG:
		case FIELD_TYPE_LONGLONG:
		case FIELD_TYPE_TINY:
		case FIELD_TYPE_SHORT:
		case FIELD_TYPE_INT24:
		case FIELD_TYPE_DATE:
		case FIELD_TYPE_DATETIME:
		case FIELD_TYPE_YEAR:
		case FIELD_TYPE_NEWDATE:
2560 2561 2562
		case FIELD_TYPE_TIME:
		case FIELD_TYPE_TIMESTAMP:
					return(DATA_INT);
2563
		case FIELD_TYPE_FLOAT:
2564
					return(DATA_FLOAT);
2565
		case FIELD_TYPE_DOUBLE:
2566
					return(DATA_DOUBLE);
2567
		case FIELD_TYPE_DECIMAL:
2568
					return(DATA_DECIMAL);
2569
		case FIELD_TYPE_GEOMETRY:
2570 2571 2572 2573 2574
		case FIELD_TYPE_TINY_BLOB:
		case FIELD_TYPE_MEDIUM_BLOB:
		case FIELD_TYPE_BLOB:
		case FIELD_TYPE_LONG_BLOB:
					return(DATA_BLOB);
2575 2576 2577 2578 2579 2580
		default:
					assert(0);
	}

	return(0);
}
2581

unknown's avatar
unknown committed
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
/***********************************************************************
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(
/*===============================*/
			/* out: value */
	const mysql_byte*	buf)	/* in: from where to read */
{
unknown's avatar
unknown committed
2608
	return (uint) ((ulint)(buf[0]) + 256 * ((ulint)(buf[1])));
unknown's avatar
unknown committed
2609 2610
}

2611
/***********************************************************************
2612
Stores a key value for a row to a buffer. */
2613 2614 2615 2616 2617 2618 2619

uint
ha_innobase::store_key_val_for_row(
/*===============================*/
				/* out: key value length as stored in buff */
	uint 		keynr,	/* in: key number */
	char*		buff,	/* in/out: buffer for the key value (in MySQL
2620 2621
				format) */
	uint		buff_len,/* in: buffer length */
2622
	const mysql_byte* record)/* in: row in MySQL format */
2623 2624 2625 2626 2627
{
	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;
	char*		buff_start	= buff;
unknown's avatar
unknown committed
2628 2629 2630
	enum_field_types mysql_type;
	Field*		field;
	ibool		is_null;
2631

2632 2633
  	DBUG_ENTER("store_key_val_for_row");

unknown's avatar
unknown committed
2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647
	/* 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
unknown's avatar
unknown committed
2648
	value is the SQL NULL then these data bytes are set to 0.
unknown's avatar
unknown committed
2649

unknown's avatar
unknown committed
2650 2651 2652 2653 2654 2655
	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
2656 2657
	simple memcmp to compare two key values to determine if they are
	equal. MySQL does this to compare contents of two 'ref' values. */
unknown's avatar
unknown committed
2658

2659
	bzero(buff, buff_len);
unknown's avatar
unknown committed
2660

2661
  	for (; key_part != end; key_part++) {
unknown's avatar
unknown committed
2662
	        is_null = FALSE;
2663 2664 2665 2666

    		if (key_part->null_bit) {
      			if (record[key_part->null_offset]
						& key_part->null_bit) {
unknown's avatar
unknown committed
2667 2668 2669 2670 2671 2672
				*buff = 1;
				is_null = TRUE;
      			} else {
				*buff = 0;
			}
			buff++;
2673
    		}
2674

unknown's avatar
unknown committed
2675 2676 2677
		field = key_part->field;
		mysql_type = field->type();

unknown's avatar
unknown committed
2678 2679 2680 2681 2682
		if (mysql_type == MYSQL_TYPE_VARCHAR) {
						/* >= 5.0.3 true VARCHAR */
			ulint	lenlen;
			ulint	len;
			byte*	data;
2683
			ulint	key_len;
2684
			ulint	true_len;
2685 2686
			CHARSET_INFO*	cs;
			int	error=0;
unknown's avatar
unknown committed
2687

2688 2689
			key_len = key_part->length;

unknown's avatar
unknown committed
2690
			if (is_null) {
2691
				buff += key_len + 2;
unknown's avatar
foo1  
unknown committed
2692

unknown's avatar
unknown committed
2693 2694
				continue;
			}
2695
			cs = field->charset();
unknown's avatar
unknown committed
2696 2697 2698 2699

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

unknown's avatar
foo1  
unknown committed
2700
			data = row_mysql_read_true_varchar(&len,
unknown's avatar
unknown committed
2701 2702 2703
				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
				lenlen);
unknown's avatar
unknown committed
2704

2705 2706 2707 2708 2709 2710 2711 2712 2713
			true_len = len;

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

			if (len > 0 && cs->mbmaxlen > 1) {
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) data,
						(const char *) data + len,
2714 2715
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
2716 2717 2718
						&error);
			}

unknown's avatar
unknown committed
2719 2720
			/* In a column prefix index, we may need to truncate
			the stored value: */
2721

2722 2723
			if (true_len > key_len) {
				true_len = key_len;
unknown's avatar
unknown committed
2724 2725
			}

unknown's avatar
unknown committed
2726 2727 2728
			/* The length in a key value is always stored in 2
			bytes */

2729
			row_mysql_store_true_var_len((byte*)buff, true_len, 2);
unknown's avatar
unknown committed
2730 2731
			buff += 2;

2732
			memcpy(buff, data, true_len);
unknown's avatar
unknown committed
2733 2734 2735 2736 2737 2738 2739

			/* 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. */

2740
			buff += key_len;
unknown's avatar
unknown committed
2741 2742

		} else if (mysql_type == FIELD_TYPE_TINY_BLOB
unknown's avatar
unknown committed
2743 2744 2745
		    || mysql_type == FIELD_TYPE_MEDIUM_BLOB
		    || mysql_type == FIELD_TYPE_BLOB
		    || mysql_type == FIELD_TYPE_LONG_BLOB) {
2746

2747 2748
			CHARSET_INFO*	cs;
			ulint		key_len;
2749
			ulint		true_len;
2750
			int		error=0;
2751 2752
			ulint		blob_len;
			byte*		blob_data;
2753

2754
			ut_a(key_part->key_part_flag & HA_PART_KEY_SEG);
unknown's avatar
unknown committed
2755

2756 2757
			key_len = key_part->length;

unknown's avatar
unknown committed
2758
		        if (is_null) {
2759
				buff += key_len + 2;
unknown's avatar
foo1  
unknown committed
2760

unknown's avatar
unknown committed
2761
				continue;
unknown's avatar
unknown committed
2762
			}
unknown's avatar
foo1  
unknown committed
2763

2764 2765
			cs = field->charset();

unknown's avatar
unknown committed
2766 2767
		        blob_data = row_mysql_read_blob_ref(&blob_len,
				(byte*) (record
unknown's avatar
unknown committed
2768
				+ (ulint)get_field_offset(table, field)),
unknown's avatar
unknown committed
2769 2770
					(ulint) field->pack_length());

2771 2772
			true_len = blob_len;

unknown's avatar
unknown committed
2773 2774
			ut_a(get_field_offset(table, field)
						     == key_part->offset);
unknown's avatar
unknown committed
2775

2776 2777
			/* For multi byte character sets we need to calculate
			the true length of the key */
unknown's avatar
foo1  
unknown committed
2778

2779 2780 2781
			if (blob_len > 0 && cs->mbmaxlen > 1) {
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) blob_data,
unknown's avatar
foo1  
unknown committed
2782
						(const char *) blob_data
2783
							+ blob_len,
2784 2785
                                                (uint) (key_len /
                                                        cs->mbmaxlen),
2786 2787 2788
						&error);
			}

unknown's avatar
unknown committed
2789 2790
			/* All indexes on BLOB and TEXT are column prefix
			indexes, and we may need to truncate the data to be
unknown's avatar
unknown committed
2791
			stored in the key value: */
unknown's avatar
unknown committed
2792

2793 2794
			if (true_len > key_len) {
				true_len = key_len;
unknown's avatar
unknown committed
2795 2796 2797 2798 2799
			}

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

unknown's avatar
unknown committed
2800
			innobase_write_to_2_little_endian(
2801
					(byte*)buff, true_len);
unknown's avatar
unknown committed
2802 2803
			buff += 2;

2804
			memcpy(buff, blob_data, true_len);
unknown's avatar
unknown committed
2805

unknown's avatar
unknown committed
2806 2807 2808
			/* Note that we always reserve the maximum possible
			length of the BLOB prefix in the key value. */

2809
			buff += key_len;
unknown's avatar
unknown committed
2810
		} else {
unknown's avatar
unknown committed
2811 2812 2813 2814 2815
			/* 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. */

2816
			CHARSET_INFO*		cs;
2817 2818
			ulint			true_len;
			ulint			key_len;
2819 2820
			const mysql_byte*	src_start;
			int			error=0;
2821 2822 2823
			enum_field_types	real_type;

			key_len = key_part->length;
2824

unknown's avatar
unknown committed
2825
		        if (is_null) {
2826
				 buff += key_len;
unknown's avatar
foo1  
unknown committed
2827

unknown's avatar
unknown committed
2828 2829
				 continue;
			}
unknown's avatar
unknown committed
2830

2831
			src_start = record + key_part->offset;
2832 2833 2834 2835 2836 2837 2838 2839
			real_type = field->real_type();
			true_len = key_len;

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

unknown's avatar
foo1  
unknown committed
2840
			if (real_type != FIELD_TYPE_ENUM
2841 2842 2843 2844 2845 2846
				&& real_type != FIELD_TYPE_SET
				&& ( mysql_type == MYSQL_TYPE_VAR_STRING
					|| mysql_type == MYSQL_TYPE_STRING)) {

				cs = field->charset();

unknown's avatar
foo1  
unknown committed
2847
				/* For multi byte character sets we need to
2848 2849 2850 2851
				calculate the true length of the key */

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

unknown's avatar
foo1  
unknown committed
2852
					true_len = (ulint)
2853 2854
						cs->cset->well_formed_len(cs,
							(const char *)src_start,
unknown's avatar
foo1  
unknown committed
2855
							(const char *)src_start
2856
								+ key_len,
2857 2858
                                                        (uint) (key_len /
                                                                cs->mbmaxlen),
2859 2860
							&error);
				}
2861 2862
			}

2863 2864
			memcpy(buff, src_start, true_len);
			buff += true_len;
2865

unknown's avatar
foo1  
unknown committed
2866 2867 2868
			/* 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
2869 2870
			support surrogate pairs, which are needed to represent
			characters in the range U+10000 to U+10FFFF. */
2871

2872 2873 2874 2875
			if (true_len < key_len) {
				ulint pad_len = key_len - true_len;
				memset(buff, ' ', pad_len);
				buff += pad_len;
2876
			}
unknown's avatar
unknown committed
2877
		}
2878 2879
  	}

2880
	ut_a(buff <= buff_start + buff_len);
unknown's avatar
unknown committed
2881 2882

	DBUG_RETURN((uint)(buff - buff_start));
2883 2884 2885
}

/******************************************************************
unknown's avatar
unknown committed
2886 2887
Builds a 'template' to the prebuilt struct. The template is used in fast
retrieval of just those column values MySQL needs in its processing. */
unknown's avatar
unknown committed
2888
static
2889
void
2890 2891 2892 2893 2894 2895 2896 2897 2898
build_template(
/*===========*/
	row_prebuilt_t*	prebuilt,	/* in: prebuilt struct */
	THD*		thd,		/* in: current user thread, used
					only if templ_type is
					ROW_MYSQL_REC_FIELDS */
	TABLE*		table,		/* in: MySQL table */
	ulint		templ_type)	/* in: ROW_MYSQL_WHOLE_ROW or
					ROW_MYSQL_REC_FIELDS */
2899
{
2900 2901
	dict_index_t*	index;
	dict_index_t*	clust_index;
2902
	mysql_row_templ_t* templ;
2903
	Field*		field;
2904 2905
	ulint		n_fields;
	ulint		n_requested_fields	= 0;
unknown's avatar
Merge  
unknown committed
2906
	ibool		fetch_all_in_key	= FALSE;
2907
	ibool		fetch_primary_key_cols	= FALSE;
2908
	ulint		i;
2909 2910
	/* byte offset of the end of last requested column */
	ulint		mysql_prefix_len	= 0;
2911

unknown's avatar
unknown committed
2912 2913 2914 2915
	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. */
unknown's avatar
unknown committed
2916

unknown's avatar
unknown committed
2917 2918 2919
	        templ_type = ROW_MYSQL_WHOLE_ROW;
	}

unknown's avatar
unknown committed
2920 2921 2922
	if (templ_type == ROW_MYSQL_REC_FIELDS) {
	     if (prebuilt->hint_need_to_fetch_extra_cols
						== ROW_RETRIEVE_ALL_COLS) {
2923

unknown's avatar
unknown committed
2924 2925
		/* We know we must at least fetch all columns in the key, or
		all columns in the table */
unknown's avatar
unknown committed
2926

unknown's avatar
Merge  
unknown committed
2927
		if (prebuilt->read_just_key) {
unknown's avatar
unknown committed
2928
			/* MySQL has instructed us that it is enough to
2929 2930 2931 2932 2933
			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 */
unknown's avatar
unknown committed
2934

unknown's avatar
Merge  
unknown committed
2935 2936 2937 2938
			fetch_all_in_key = TRUE;
		} else {
			templ_type = ROW_MYSQL_WHOLE_ROW;
		}
unknown's avatar
unknown committed
2939 2940
	    } else if (prebuilt->hint_need_to_fetch_extra_cols
						== ROW_RETRIEVE_PRIMARY_KEY) {
unknown's avatar
unknown committed
2941 2942 2943 2944 2945
		/* 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. */
unknown's avatar
unknown committed
2946 2947 2948

		fetch_primary_key_cols = TRUE;
	    }
2949 2950
	}

unknown's avatar
unknown committed
2951
	clust_index = dict_table_get_first_index_noninline(prebuilt->table);
unknown's avatar
unknown committed
2952

2953
	if (templ_type == ROW_MYSQL_REC_FIELDS) {
unknown's avatar
unknown committed
2954
		index = prebuilt->index;
2955 2956
	} else {
		index = clust_index;
2957
	}
2958

2959 2960 2961 2962 2963 2964 2965
	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 */
	}
2966

2967
	n_fields = (ulint)table->s->fields; /* number of columns */
2968 2969 2970 2971 2972 2973

	if (!prebuilt->mysql_template) {
		prebuilt->mysql_template = (mysql_row_templ_t*)
						mem_alloc_noninline(
					n_fields * sizeof(mysql_row_templ_t));
	}
2974

2975
	prebuilt->template_type = templ_type;
2976
	prebuilt->null_bitmap_len = table->s->null_bytes;
2977

2978 2979
	prebuilt->templ_contains_blob = FALSE;

unknown's avatar
unknown committed
2980 2981
	/* Note that in InnoDB, i is the column number. MySQL calls columns
	'fields'. */
2982
	for (i = 0; i < n_fields; i++) {
2983
		templ = prebuilt->mysql_template + n_requested_fields;
2984 2985
		field = table->field[i];

2986 2987 2988 2989 2990
		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);
2991

2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017
			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;
			}

			if (thd->query_id == field->query_id) {
				/* This field is needed in the query */

				goto include_field;
			}

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

				goto include_field;
			}
unknown's avatar
unknown committed
3018 3019

			/* This field is not needed in the query, skip it */
3020 3021 3022

			goto skip_field;
		}
3023
include_field:
3024
		n_requested_fields++;
3025

3026
		templ->col_no = i;
3027

3028 3029 3030
		if (index == clust_index) {
			templ->rec_field_no = (index->table->cols + i)
								->clust_pos;
3031
		} else {
3032 3033
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
3034 3035
		}

3036 3037 3038 3039 3040 3041 3042 3043
		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]);
3044

3045 3046 3047 3048
			templ->mysql_null_bit_mask = (ulint) field->null_bit;
		} else {
			templ->mysql_null_bit_mask = 0;
		}
3049

unknown's avatar
unknown committed
3050 3051 3052
		templ->mysql_col_offset = (ulint)
					get_field_offset(table, field);

3053
		templ->mysql_col_len = (ulint) field->pack_length();
3054 3055 3056 3057 3058
		if (mysql_prefix_len < templ->mysql_col_offset
				+ templ->mysql_col_len) {
			mysql_prefix_len = templ->mysql_col_offset
				+ templ->mysql_col_len;
		}
unknown's avatar
unknown committed
3059
		templ->type = index->table->cols[i].type.mtype;
unknown's avatar
unknown committed
3060 3061 3062 3063 3064 3065
		templ->mysql_type = (ulint)field->type();

		if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR) {
			templ->mysql_length_bytes = (ulint)
				    (((Field_varstring*)field)->length_bytes);
		}
unknown's avatar
foo1  
unknown committed
3066

3067 3068
		templ->charset = dtype_get_charset_coll_noninline(
				index->table->cols[i].type.prtype);
3069 3070
		templ->mbminlen = index->table->cols[i].type.mbminlen;
		templ->mbmaxlen = index->table->cols[i].type.mbmaxlen;
unknown's avatar
unknown committed
3071 3072
		templ->is_unsigned = index->table->cols[i].type.prtype
							& DATA_UNSIGNED;
3073 3074
		if (templ->type == DATA_BLOB) {
			prebuilt->templ_contains_blob = TRUE;
3075
		}
3076 3077 3078
skip_field:
		;
	}
3079

3080
	prebuilt->n_template = n_requested_fields;
3081
	prebuilt->mysql_prefix_len = mysql_prefix_len;
3082

unknown's avatar
unknown committed
3083
	if (index != clust_index && prebuilt->need_to_access_clustered) {
3084 3085 3086 3087
		/* 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;
3088

3089 3090 3091
			templ->rec_field_no =
			    (index->table->cols + templ->col_no)->clust_pos;
		}
3092
	}
3093 3094 3095
}

/************************************************************************
3096
Stores a row in an InnoDB database, to the table specified in this
3097 3098 3099 3100 3101
handle. */

int
ha_innobase::write_row(
/*===================*/
3102 3103
				/* out: error code */
	mysql_byte* 	record)	/* in: a row in MySQL format */
3104
{
3105
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
3106
  	int 		error;
3107
	longlong	auto_inc;
unknown's avatar
unknown committed
3108
	longlong	dummy;
unknown's avatar
unknown committed
3109
	ibool           auto_inc_used= FALSE;
unknown's avatar
unknown committed
3110

3111
  	DBUG_ENTER("ha_innobase::write_row");
3112

unknown's avatar
unknown committed
3113
	if (prebuilt->trx !=
3114
                        (trx_t*) current_thd->ha_data[innobase_hton.slot]) {
3115 3116 3117 3118
	  sql_print_error("The transaction object for the table handle is at "
			  "%p, but for the current thread it is at %p",
			  prebuilt->trx,
			  (trx_t*) current_thd->ha_data[innobase_hton.slot]);
3119

3120 3121 3122 3123 3124 3125
		fputs("InnoDB: Dump of 200 bytes around prebuilt: ", stderr);
		ut_print_buf(stderr, ((const byte*)prebuilt) - 100, 200);
		fputs("\n"
			"InnoDB: Dump of 200 bytes around transaction.all: ",
			stderr);
		ut_print_buf(stderr,
unknown's avatar
unknown committed
3126 3127
           	 ((byte*)(&(current_thd->ha_data[innobase_hton.slot]))) - 100,
								200);
3128 3129
		putc('\n', stderr);
		ut_error;
unknown's avatar
unknown committed
3130
	}
unknown's avatar
unknown committed
3131

3132 3133
  	statistic_increment(current_thd->status_var.ha_write_count,
			    &LOCK_status);
3134

3135 3136
        if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
                table->timestamp_field->set_time();
3137

3138
	if ((user_thd->lex->sql_command == SQLCOM_ALTER_TABLE
unknown's avatar
unknown committed
3139
	    || user_thd->lex->sql_command == SQLCOM_OPTIMIZE
3140 3141
	    || user_thd->lex->sql_command == SQLCOM_CREATE_INDEX
	    || user_thd->lex->sql_command == SQLCOM_DROP_INDEX)
unknown's avatar
unknown committed
3142
	    && num_write_row >= 10000) {
3143 3144 3145 3146 3147 3148 3149 3150
		/* 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. */
3151

3152
		dict_table_t*	src_table;
unknown's avatar
unknown committed
3153
		ulint		mode;
3154

3155
		num_write_row = 0;
3156

unknown's avatar
unknown committed
3157 3158
		/* Commit the transaction.  This will release the table
		locks, so they have to be acquired again. */
3159 3160 3161 3162 3163 3164

		/* Altering an InnoDB table */
		/* Get the source table. */
		src_table = lock_get_src_table(
				prebuilt->trx, prebuilt->table, &mode);
		if (!src_table) {
unknown's avatar
unknown committed
3165
no_commit:
3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178
			/* Unknown situation: do not commit */
			/*
			ut_print_timestamp(stderr);
			fprintf(stderr,
				"  InnoDB error: ALTER TABLE is holding lock"
				" 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. */

3179
			/* Altering to InnoDB format */
unknown's avatar
unknown committed
3180
                        innobase_commit(user_thd, 1);
3181
			/* Note that this transaction is still active. */
3182
			prebuilt->trx->active_trans = 1;
3183 3184
			/* We will need an IX lock on the destination table. */
		        prebuilt->sql_stat_start = TRUE;
3185 3186 3187
		} else {
			/* Ensure that there are no other table locks than
			LOCK_IX and LOCK_AUTO_INC on the destination table. */
unknown's avatar
unknown committed
3188

3189 3190
			if (!lock_is_table_exclusive(prebuilt->table,
							prebuilt->trx)) {
3191 3192 3193 3194 3195
				goto no_commit;
			}

			/* Commit the transaction.  This will release the table
			locks, so they have to be acquired again. */
unknown's avatar
unknown committed
3196
                        innobase_commit(user_thd, 1);
3197
			/* Note that this transaction is still active. */
3198
			prebuilt->trx->active_trans = 1;
3199
			/* Re-acquire the table lock on the source table. */
3200
			row_lock_table_for_mysql(prebuilt, src_table, mode);
3201 3202 3203
			/* We will need an IX lock on the destination table. */
		        prebuilt->sql_stat_start = TRUE;
		}
3204 3205
	}

unknown's avatar
unknown committed
3206 3207
	num_write_row++;

unknown's avatar
unknown committed
3208 3209 3210
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
unknown's avatar
unknown committed
3211 3212

		innobase_release_stat_resources(prebuilt->trx);
unknown's avatar
unknown committed
3213 3214
	}

3215
  	if (table->next_number_field && record == table->record[0]) {
unknown's avatar
unknown committed
3216 3217
		/* This is the case where the table has an
		auto-increment column */
unknown's avatar
unknown committed
3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242

		/* Initialize the auto-inc counter if it has not been
		initialized yet */

		if (0 == dict_table_autoinc_peek(prebuilt->table)) {

			/* This call initializes the counter */
		        error = innobase_read_and_init_auto_inc(&dummy);

			if (error) {
				/* Deadlock or lock wait timeout */

				goto func_exit;
			}

			/* We have to set sql_stat_start to TRUE because
			the above call probably has called a select, and
			has reset that flag; row_insert_for_mysql has to
			know to set the IX intention lock on the table,
			something it only does at the start of each
			statement */

			prebuilt->sql_stat_start = TRUE;
		}

unknown's avatar
unknown committed
3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262
		/* We have to use the transactional lock mechanism on the
		auto-inc counter of the table to ensure that replication and
		roll-forward of the binlog exactly imitates also the given
		auto-inc values. The lock is released at each SQL statement's
		end. This lock also prevents a race where two threads would
		call ::get_auto_increment() simultaneously. */

		error = row_lock_table_autoinc_for_mysql(prebuilt);

		if (error != DB_SUCCESS) {
			/* Deadlock or lock wait timeout */

			error = convert_error_code_to_mysql(error, user_thd);

			goto func_exit;
		}

		/* We must use the handler code to update the auto-increment
                value to be sure that we increment it correctly. */

unknown's avatar
unknown committed
3263 3264
    		if ((error= update_auto_increment()))
			goto func_exit;
unknown's avatar
unknown committed
3265
                auto_inc_used = 1;
unknown's avatar
unknown committed
3266

3267
	}
3268

3269 3270 3271 3272
	if (prebuilt->mysql_template == NULL
			|| prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) {
		/* Build the template used in converting quickly between
		the two database formats */
3273

3274 3275
		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
	}
3276

3277
	innodb_srv_conc_enter_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3278

3279
	error = row_insert_for_mysql((byte*) record, prebuilt);
unknown's avatar
Merge  
unknown committed
3280

3281
	if (error == DB_SUCCESS && auto_inc_used) {
unknown's avatar
Merge  
unknown committed
3282

unknown's avatar
unknown committed
3283
        	/* Fetch the value that was set in the autoincrement field */
unknown's avatar
unknown committed
3284

unknown's avatar
unknown committed
3285
          	auto_inc = table->next_number_field->val_int();
3286

unknown's avatar
unknown committed
3287
          	if (auto_inc != 0) {
unknown's avatar
unknown committed
3288 3289
			/* This call will update the counter according to the
			value that was inserted in the table */
3290

unknown's avatar
unknown committed
3291 3292
            		dict_table_autoinc_update(prebuilt->table, auto_inc);
          	}
3293
        }
3294

unknown's avatar
unknown committed
3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311
        /* A REPLACE command and LOAD DATA INFILE REPLACE handle a duplicate
        key error themselves, and we must update the autoinc counter if we are
        performing those statements. */

        if (error == DB_DUPLICATE_KEY && auto_inc_used
            && (user_thd->lex->sql_command == SQLCOM_REPLACE
                || user_thd->lex->sql_command == SQLCOM_REPLACE_SELECT
                || (user_thd->lex->sql_command == SQLCOM_LOAD
                    && user_thd->lex->duplicates == DUP_REPLACE))) {

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

                if (auto_inc != 0) {
                        dict_table_autoinc_update(prebuilt->table, auto_inc);
                }
        }

unknown's avatar
unknown committed
3312
	innodb_srv_conc_exit_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3313

unknown's avatar
unknown committed
3314
	error = convert_error_code_to_mysql(error, user_thd);
3315

3316
	/* Tell InnoDB server that there might be work for
3317
	utility threads: */
3318
func_exit:
3319
	innobase_active_small();
3320 3321 3322 3323

  	DBUG_RETURN(error);
}

3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334
/**************************************************************************
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 */
	mysql_byte* 	old_row,	/* in: old row in MySQL format */
	mysql_byte* 	new_row,	/* in: new row in MySQL format */
unknown's avatar
unknown committed
3335 3336
	struct st_table* table,		/* in: table in MySQL data
					dictionary */
3337
	mysql_byte*	upd_buff,	/* in: buffer to use */
unknown's avatar
unknown committed
3338
	ulint		buff_len,	/* in: buffer length */
3339
	row_prebuilt_t*	prebuilt,	/* in: InnoDB prebuilt struct */
3340 3341
	THD*		thd)		/* in: user thread */
{
unknown's avatar
unknown committed
3342
	mysql_byte*	original_upd_buff = upd_buff;
3343
	Field*		field;
unknown's avatar
unknown committed
3344
	enum_field_types field_mysql_type;
3345 3346 3347
	uint		n_fields;
	ulint		o_len;
	ulint		n_len;
unknown's avatar
unknown committed
3348
	ulint		col_pack_len;
unknown's avatar
unknown committed
3349
	byte*		new_mysql_row_col;
unknown's avatar
unknown committed
3350 3351 3352
	byte*	        o_ptr;
        byte*	        n_ptr;
        byte*	        buf;
3353
	upd_field_t*	ufield;
3354
	ulint		col_type;
3355
	ulint		n_changed = 0;
unknown's avatar
unknown committed
3356
	dfield_t	dfield;
3357
	uint		i;
3358

3359
	n_fields = table->s->fields;
3360

3361
	/* We use upd_buff to convert changed fields */
unknown's avatar
unknown committed
3362
	buf = (byte*) upd_buff;
3363

3364 3365 3366
	for (i = 0; i < n_fields; i++) {
		field = table->field[i];

3367
		/* if (thd->query_id != field->query_id) { */
3368 3369
			/* TODO: check that these fields cannot have
			changed! */
3370

3371 3372
		/*	goto skip_field;
		}*/
3373

unknown's avatar
unknown committed
3374 3375
		o_ptr = (byte*) old_row + get_field_offset(table, field);
		n_ptr = (byte*) new_row + get_field_offset(table, field);
unknown's avatar
foo1  
unknown committed
3376

unknown's avatar
unknown committed
3377 3378 3379
		/* Use new_mysql_row_col and col_pack_len save the values */

		new_mysql_row_col = n_ptr;
unknown's avatar
unknown committed
3380
		col_pack_len = field->pack_length();
unknown's avatar
unknown committed
3381

unknown's avatar
unknown committed
3382 3383
		o_len = col_pack_len;
		n_len = col_pack_len;
3384

unknown's avatar
unknown committed
3385
		/* We use o_ptr and n_ptr to dig up the actual data for
unknown's avatar
foo1  
unknown committed
3386
		comparison. */
unknown's avatar
unknown committed
3387

unknown's avatar
unknown committed
3388
		field_mysql_type = field->type();
unknown's avatar
foo1  
unknown committed
3389

unknown's avatar
unknown committed
3390
		col_type = prebuilt->table->cols[i].type.mtype;
3391 3392 3393 3394 3395 3396

		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);
unknown's avatar
unknown committed
3397

3398
			break;
unknown's avatar
unknown committed
3399

3400 3401 3402
		case DATA_VARCHAR:
		case DATA_BINARY:
		case DATA_VARMYSQL:
unknown's avatar
unknown committed
3403 3404 3405 3406
			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 */
unknown's avatar
foo1  
unknown committed
3407

unknown's avatar
unknown committed
3408 3409 3410 3411
				o_ptr = row_mysql_read_true_varchar(
						&o_len, o_ptr,
				    (ulint)
				    (((Field_varstring*)field)->length_bytes));
unknown's avatar
foo1  
unknown committed
3412

unknown's avatar
unknown committed
3413 3414 3415 3416 3417 3418 3419
				n_ptr = row_mysql_read_true_varchar(
						&n_len, n_ptr,
				    (ulint)
				    (((Field_varstring*)field)->length_bytes));
			}

			break;
3420 3421 3422
		default:
			;
		}
3423

3424
		if (field->null_ptr) {
unknown's avatar
unknown committed
3425 3426
			if (field_in_record_is_null(table, field,
							(char*) old_row)) {
3427 3428
				o_len = UNIV_SQL_NULL;
			}
3429

unknown's avatar
unknown committed
3430 3431
			if (field_in_record_is_null(table, field,
							(char*) new_row)) {
3432 3433 3434 3435 3436 3437 3438 3439 3440
				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;
unknown's avatar
foo1  
unknown committed
3441

unknown's avatar
unknown committed
3442 3443 3444 3445 3446 3447 3448 3449 3450 3451
			/* Let us use a dummy dfield to make the conversion
			from the MySQL column format to the InnoDB format */

			dfield.type = (prebuilt->table->cols + i)->type;

			if (n_len != UNIV_SQL_NULL) {
				buf = row_mysql_store_col_in_innobase_format(
						&dfield,
						(byte*)buf,
						TRUE,
unknown's avatar
unknown committed
3452
						new_mysql_row_col,
unknown's avatar
unknown committed
3453 3454
						col_pack_len,
						prebuilt->table->comp);
unknown's avatar
unknown committed
3455 3456
				ufield->new_val.data = dfield.data;
				ufield->new_val.len = dfield.len;
unknown's avatar
unknown committed
3457 3458 3459 3460
			} else {
				ufield->new_val.data = NULL;
				ufield->new_val.len = UNIV_SQL_NULL;
			}
3461 3462

			ufield->exp = NULL;
unknown's avatar
unknown committed
3463
			ufield->field_no = prebuilt->table->cols[i].clust_pos;
3464 3465 3466 3467 3468 3469 3470
			n_changed++;
		}
	}

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

unknown's avatar
unknown committed
3471 3472
	ut_a(buf <= (byte*)original_upd_buff + buff_len);

3473 3474 3475 3476 3477 3478 3479
	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.
3480
TODO: currently InnoDB does not prevent the 'Halloween problem':
3481 3482
in a searched update a single row can get updated several times
if its index columns are updated! */
3483

3484 3485 3486 3487
int
ha_innobase::update_row(
/*====================*/
					/* out: error number or 0 */
3488 3489
	const mysql_byte* 	old_row,/* in: old row in MySQL format */
	mysql_byte* 		new_row)/* in: new row in MySQL format */
3490 3491 3492 3493 3494
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	upd_t*		uvect;
	int		error = 0;

3495
	DBUG_ENTER("ha_innobase::update_row");
3496

unknown's avatar
unknown committed
3497
	ut_ad(prebuilt->trx ==
3498
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
3499

3500 3501
        if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
                table->timestamp_field->set_time();
3502

unknown's avatar
unknown committed
3503 3504 3505
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
unknown's avatar
unknown committed
3506 3507

		innobase_release_stat_resources(prebuilt->trx);
unknown's avatar
unknown committed
3508 3509
	}

3510 3511 3512 3513 3514
	if (prebuilt->upd_node) {
		uvect = prebuilt->upd_node->update;
	} else {
		uvect = row_get_prebuilt_update_vector(prebuilt);
	}
3515 3516 3517 3518

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

3519
	calc_row_difference(uvect, (mysql_byte*) old_row, new_row, table,
unknown's avatar
unknown committed
3520 3521 3522
			upd_buff, (ulint)upd_and_key_val_buff_len,
			prebuilt, user_thd);

3523 3524 3525
	/* This is not a delete */
	prebuilt->upd_node->is_delete = FALSE;

unknown's avatar
unknown committed
3526
	assert(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);
3527

unknown's avatar
unknown committed
3528
	innodb_srv_conc_enter_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3529

3530
	error = row_update_for_mysql((byte*) old_row, prebuilt);
3531

unknown's avatar
unknown committed
3532
	innodb_srv_conc_exit_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3533

unknown's avatar
unknown committed
3534
	error = convert_error_code_to_mysql(error, user_thd);
3535

3536
	/* Tell InnoDB server that there might be work for
3537 3538
	utility threads: */

3539
	innobase_active_small();
3540 3541 3542 3543 3544 3545 3546 3547 3548 3549

	DBUG_RETURN(error);
}

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

int
ha_innobase::delete_row(
/*====================*/
3550 3551
					/* out: error number or 0 */
	const mysql_byte* record)	/* in: a row in MySQL format */
3552 3553 3554 3555
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error = 0;

3556
	DBUG_ENTER("ha_innobase::delete_row");
3557

unknown's avatar
unknown committed
3558
	ut_ad(prebuilt->trx ==
3559
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
3560

unknown's avatar
unknown committed
3561 3562 3563
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
unknown's avatar
unknown committed
3564 3565

		innobase_release_stat_resources(prebuilt->trx);
unknown's avatar
unknown committed
3566 3567
	}

3568 3569 3570
	if (!prebuilt->upd_node) {
		row_get_prebuilt_update_vector(prebuilt);
	}
3571 3572

	/* This is a delete */
3573

3574
	prebuilt->upd_node->is_delete = TRUE;
3575

unknown's avatar
unknown committed
3576
	innodb_srv_conc_enter_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3577

3578
	error = row_update_for_mysql((byte*) record, prebuilt);
3579

unknown's avatar
unknown committed
3580
	innodb_srv_conc_exit_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3581

unknown's avatar
unknown committed
3582
	error = convert_error_code_to_mysql(error, user_thd);
3583

3584
	/* Tell the InnoDB server that there might be work for
3585 3586
	utility threads: */

3587
	innobase_active_small();
3588 3589 3590 3591

	DBUG_RETURN(error);
}

3592
/**************************************************************************
unknown's avatar
foo1  
unknown committed
3593
Removes a new lock set on a row. This method does nothing unless the
3594
option innodb_locks_unsafe_for_binlog is set.*/
3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605

void
ha_innobase::unlock_row(void)
/*=========================*/
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;

	DBUG_ENTER("ha_innobase::unlock_row");

	if (last_query_id != user_thd->query_id) {
		ut_print_timestamp(stderr);
3606 3607 3608
		sql_print_error("last_query_id is %lu != user_thd_query_id is "
				"%lu", (ulong) last_query_id,
				(ulong) user_thd->query_id);
3609 3610 3611
		mem_analyze_corruption((byte *) prebuilt->trx);
		ut_error;
	}
unknown's avatar
unknown committed
3612 3613 3614 3615 3616 3617 3618 3619

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

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

unknown's avatar
unknown committed
3620 3621 3622
	if (srv_locks_unsafe_for_binlog) {
		row_unlock_for_mysql(prebuilt, FALSE);
	}
3623 3624 3625

	DBUG_VOID_RETURN;

3626 3627
}

3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639
/**********************************************************************
Initializes a handle to use an index. */

int
ha_innobase::index_init(
/*====================*/
			/* out: 0 or error number */
	uint 	keynr)	/* in: key (index) number */
{
	int 	error	= 0;
  	DBUG_ENTER("index_init");

unknown's avatar
Merge  
unknown committed
3640
	error = change_active_index(keynr);
3641 3642 3643 3644 3645

  	DBUG_RETURN(error);
}

/**********************************************************************
3646
Currently does nothing. */
3647 3648 3649 3650 3651 3652 3653

int
ha_innobase::index_end(void)
/*========================*/
{
	int 	error	= 0;
  	DBUG_ENTER("index_end");
unknown's avatar
unknown committed
3654
        active_index=MAX_KEY;
3655 3656 3657 3658 3659
  	DBUG_RETURN(error);
}

/*************************************************************************
Converts a search mode flag understood by MySQL to a flag understood
3660
by InnoDB. */
3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674
inline
ulint
convert_search_mode_to_innobase(
/*============================*/
	enum ha_rkey_function	find_flag)
{
	switch (find_flag) {
  		case HA_READ_KEY_EXACT:		return(PAGE_CUR_GE);
  			/* the above does not require the index to be UNIQUE */
  		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);
unknown's avatar
unknown committed
3675
	        case HA_READ_PREFIX_LAST:       return(PAGE_CUR_LE);
unknown's avatar
unknown committed
3676 3677 3678
                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
unknown's avatar
unknown committed
3679 3680 3681 3682 3683
		  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
unknown's avatar
unknown committed
3684 3685 3686 3687 3688 3689 3690
		  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. */

3691 3692 3693 3694 3695
		default:			assert(0);
	}

	return(0);
}
3696

unknown's avatar
unknown committed
3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745
/*
   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. */


3746 3747 3748 3749 3750 3751 3752 3753 3754
/**************************************************************************
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 */
3755
	mysql_byte*		buf,	/* in/out: buffer for the returned
3756
					row */
3757
	const mysql_byte* 	key_ptr,/* in: key value; if this is NULL
3758
					we position the cursor at the
unknown's avatar
unknown committed
3759 3760 3761
					start or end of index; this can
					also contain an InnoDB row id, in
					which case key_len is the InnoDB
unknown's avatar
unknown committed
3762 3763 3764 3765
					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 */
3766
	uint			key_len,/* in: key value length */
3767 3768 3769 3770 3771 3772 3773 3774 3775 3776
	enum ha_rkey_function find_flag)/* in: search flags from my_base.h */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	ulint		mode;
	dict_index_t*	index;
	ulint		match_mode 	= 0;
	int 		error;
	ulint		ret;

  	DBUG_ENTER("index_read");
unknown's avatar
unknown committed
3777

unknown's avatar
unknown committed
3778
	ut_ad(prebuilt->trx ==
3779
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
3780

3781 3782
  	statistic_increment(current_thd->status_var.ha_read_key_count,
			    &LOCK_status);
3783

unknown's avatar
unknown committed
3784 3785 3786
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
unknown's avatar
unknown committed
3787 3788

		innobase_release_stat_resources(prebuilt->trx);
unknown's avatar
unknown committed
3789 3790
	}

3791
	index = prebuilt->index;
3792

unknown's avatar
unknown committed
3793 3794
	/* Note that if the index for which the search template is built is not
        necessarily prebuilt->index, but can also be the clustered index */
3795

3796 3797 3798 3799
	if (prebuilt->sql_stat_start) {
		build_template(prebuilt, user_thd, table,
							ROW_MYSQL_REC_FIELDS);
	}
3800 3801

	if (key_ptr) {
unknown's avatar
unknown committed
3802 3803 3804
	        /* Convert the search key value to InnoDB format into
		prebuilt->search_tuple */

3805
		row_sel_convert_mysql_key_to_innobase(prebuilt->search_tuple,
unknown's avatar
unknown committed
3806 3807 3808 3809
					(byte*) key_val_buff,
					(ulint)upd_and_key_val_buff_len,
					index,
					(byte*) key_ptr,
3810
					(ulint) key_len, prebuilt->trx);
3811 3812 3813 3814 3815 3816
	} else {
		/* We position the cursor to the last or the first entry
		in the index */

 		dtuple_set_n_fields(prebuilt->search_tuple, 0);
	}
3817

3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829
	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;
	}

unknown's avatar
unknown committed
3830
	last_match_mode = (uint) match_mode;
3831

unknown's avatar
unknown committed
3832
	innodb_srv_conc_enter_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3833

unknown's avatar
unknown committed
3834
	ret = row_search_for_mysql((byte*) buf, mode, prebuilt, match_mode, 0);
3835

unknown's avatar
unknown committed
3836
	innodb_srv_conc_exit_innodb(prebuilt->trx);
unknown's avatar
Merge  
unknown committed
3837

3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849
	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 {
unknown's avatar
unknown committed
3850
		error = convert_error_code_to_mysql((int) ret, user_thd);
3851 3852
		table->status = STATUS_NOT_FOUND;
	}
3853

3854 3855 3856
	DBUG_RETURN(error);
}

unknown's avatar
unknown committed
3857 3858 3859
/***********************************************************************
The following functions works like index_read, but it find the last
row with the current key value or prefix. */
3860 3861

int
unknown's avatar
unknown committed
3862 3863 3864 3865 3866 3867 3868 3869 3870
ha_innobase::index_read_last(
/*=========================*/
			           /* out: 0, HA_ERR_KEY_NOT_FOUND, or an
				   error code */
        mysql_byte*       buf,     /* out: fetched row */
        const mysql_byte* 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 */
3871
{
unknown's avatar
unknown committed
3872
        return(index_read(buf, key_ptr, key_len, HA_READ_PREFIX_LAST));
3873 3874
}

3875
/************************************************************************
unknown's avatar
unknown committed
3876
Changes the active index of a handle. */
3877 3878 3879 3880

int
ha_innobase::change_active_index(
/*=============================*/
3881 3882 3883
			/* out: 0 or error code */
	uint 	keynr)	/* in: use this index; MAX_KEY means always clustered
			index, even if it was internally generated by
3884
			InnoDB */
3885
{
unknown's avatar
unknown committed
3886 3887
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	KEY*		key=0;
3888 3889
	statistic_increment(current_thd->status_var.ha_read_key_count,
			    &LOCK_status);
unknown's avatar
unknown committed
3890
	DBUG_ENTER("change_active_index");
3891

unknown's avatar
unknown committed
3892 3893
	ut_ad(user_thd == current_thd);
	ut_ad(prebuilt->trx ==
3894
             (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
3895

unknown's avatar
unknown committed
3896
	active_index = keynr;
3897

3898
	if (keynr != MAX_KEY && table->s->keys > 0) {
unknown's avatar
unknown committed
3899
		key = table->key_info + active_index;
3900

unknown's avatar
unknown committed
3901
		prebuilt->index = dict_table_get_index_noninline(
unknown's avatar
unknown committed
3902 3903
						     prebuilt->table,
						     key->name);
unknown's avatar
unknown committed
3904 3905
        } else {
		prebuilt->index = dict_table_get_first_index_noninline(
unknown's avatar
unknown committed
3906
							   prebuilt->table);
unknown's avatar
unknown committed
3907
	}
3908

unknown's avatar
unknown committed
3909
	if (!prebuilt->index) {
3910 3911 3912 3913
	       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);
unknown's avatar
unknown committed
3914 3915
	      DBUG_RETURN(1);
	}
3916

unknown's avatar
unknown committed
3917
	assert(prebuilt->search_tuple != 0);
unknown's avatar
Merge  
unknown committed
3918

unknown's avatar
unknown committed
3919
	dtuple_set_n_fields(prebuilt->search_tuple, prebuilt->index->n_fields);
3920

unknown's avatar
unknown committed
3921
	dict_index_copy_types(prebuilt->search_tuple, prebuilt->index,
3922
			prebuilt->index->n_fields);
3923

unknown's avatar
unknown committed
3924 3925 3926 3927 3928
	/* 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. */
3929

unknown's avatar
unknown committed
3930
	build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS);
3931

unknown's avatar
unknown committed
3932
	DBUG_RETURN(0);
3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943
}

/**************************************************************************
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 */
3944
	mysql_byte*	buf,		/* in/out: buffer for the returned
3945 3946
					row */
	uint 		keynr,		/* in: use this index */
3947
	const mysql_byte* key,		/* in: key value; if this is NULL
3948 3949 3950 3951 3952
					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 */
{
unknown's avatar
Merge  
unknown committed
3953 3954 3955 3956
	if (change_active_index(keynr)) {

		return(1);
	}
3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969

	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 */
3970
	mysql_byte* 	buf,	/* in/out: buffer for next row in MySQL
3971 3972 3973 3974 3975 3976 3977 3978
				format */
	uint 	direction,	/* in: ROW_SEL_NEXT or ROW_SEL_PREV */
	uint	match_mode)	/* in: 0, ROW_SEL_EXACT, or
				ROW_SEL_EXACT_PREFIX */
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	ulint		ret;
	int		error	= 0;
3979

3980
	DBUG_ENTER("general_fetch");
3981

unknown's avatar
unknown committed
3982
	ut_ad(prebuilt->trx ==
3983
             (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
3984

unknown's avatar
unknown committed
3985
	innodb_srv_conc_enter_innodb(prebuilt->trx);
unknown's avatar
unknown committed
3986

unknown's avatar
Merge  
unknown committed
3987 3988
	ret = row_search_for_mysql((byte*)buf, 0, prebuilt, match_mode,
								direction);
unknown's avatar
unknown committed
3989
	innodb_srv_conc_exit_innodb(prebuilt->trx);
3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002

	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 {
unknown's avatar
unknown committed
4003
		error = convert_error_code_to_mysql((int) ret, user_thd);
4004 4005
		table->status = STATUS_NOT_FOUND;
	}
4006

4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018
	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 */
4019
	mysql_byte* 	buf)	/* in/out: buffer for next row in MySQL
4020 4021
				format */
{
4022 4023
  	statistic_increment(current_thd->status_var.ha_read_next_count,
			    &LOCK_status);
4024

4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035
	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 */
4036 4037
	mysql_byte* 	buf,	/* in/out: buffer for the row */
	const mysql_byte* key,	/* in: key value */
4038 4039
	uint 		keylen)	/* in: key value length */
{
4040 4041
  	statistic_increment(current_thd->status_var.ha_read_next_count,
			    &LOCK_status);
4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054

	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(
/*====================*/
				/* out: 0, HA_ERR_END_OF_FILE, or error
				number */
4055
	mysql_byte* 	buf)	/* in/out: buffer for previous row in MySQL
4056 4057
				format */
{
unknown's avatar
unknown committed
4058 4059 4060
  	statistic_increment(current_thd->status_var.ha_read_prev_count,
			    &LOCK_status);

4061 4062 4063 4064 4065 4066 4067 4068 4069 4070
	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(
/*=====================*/
4071
				/* out: 0, HA_ERR_END_OF_FILE,
4072 4073
				or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
4074 4075 4076 4077
{
	int	error;

  	DBUG_ENTER("index_first");
4078 4079
  	statistic_increment(current_thd->status_var.ha_read_first_count,
			    &LOCK_status);
4080 4081 4082

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

4083 4084 4085 4086 4087 4088
        /* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */

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

4089 4090 4091 4092 4093 4094 4095 4096 4097 4098
  	DBUG_RETURN(error);
}

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

int
ha_innobase::index_last(
/*====================*/
4099 4100
				/* out: 0, HA_ERR_END_OF_FILE, or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
4101 4102 4103
{
	int	error;

4104
  	DBUG_ENTER("index_last");
4105 4106
  	statistic_increment(current_thd->status_var.ha_read_last_count,
			    &LOCK_status);
4107 4108 4109

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

4110
        /* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125

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

  	DBUG_RETURN(error);
}

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

int
ha_innobase::rnd_init(
/*==================*/
			/* out: 0 or error number */
4126
	bool	scan)	/* in: ???????? */
4127
{
unknown's avatar
Merge  
unknown committed
4128
	int	err;
unknown's avatar
unknown committed
4129

4130
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
4131

unknown's avatar
unknown committed
4132 4133 4134
	/* Store the active index value so that we can restore the original
	value after a scan */

4135
	if (prebuilt->clust_index_was_generated) {
unknown's avatar
Merge  
unknown committed
4136
		err = change_active_index(MAX_KEY);
4137
	} else {
unknown's avatar
Merge  
unknown committed
4138
		err = change_active_index(primary_key);
4139
	}
4140

4141
  	start_of_scan = 1;
4142

unknown's avatar
Merge  
unknown committed
4143
 	return(err);
4144 4145 4146
}

/*********************************************************************
unknown's avatar
unknown committed
4147
Ends a table scan. */
4148 4149 4150 4151 4152 4153

int
ha_innobase::rnd_end(void)
/*======================*/
				/* out: 0 or error number */
{
unknown's avatar
unknown committed
4154
	return(index_end());
4155 4156 4157 4158 4159 4160 4161 4162 4163 4164
}

/*********************************************************************
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 */
4165
	mysql_byte* buf)/* in/out: returns the row in this buffer,
4166 4167
			in MySQL format */
{
4168
	int	error;
4169 4170

  	DBUG_ENTER("rnd_next");
4171 4172
  	statistic_increment(current_thd->status_var.ha_read_rnd_next_count,
			    &LOCK_status);
4173

4174
  	if (start_of_scan) {
4175 4176 4177 4178
		error = index_first(buf);
		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
4179
		start_of_scan = 0;
4180
	} else {
4181
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
4182
	}
4183

4184 4185 4186 4187
  	DBUG_RETURN(error);
}

/**************************************************************************
unknown's avatar
unknown committed
4188
Fetches a row from the table based on a row reference. */
4189

4190 4191 4192
int
ha_innobase::rnd_pos(
/*=================*/
4193 4194 4195
				/* out: 0, HA_ERR_KEY_NOT_FOUND,
				or error code */
	mysql_byte* 	buf,	/* in/out: buffer for the row */
unknown's avatar
unknown committed
4196 4197 4198 4199 4200
	mysql_byte*	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 */
4201
{
4202 4203 4204
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error;
	uint		keynr	= active_index;
4205
	DBUG_ENTER("rnd_pos");
unknown's avatar
unknown committed
4206
	DBUG_DUMP("key", (char*) pos, ref_length);
unknown's avatar
unknown committed
4207

4208 4209
	statistic_increment(current_thd->status_var.ha_read_rnd_count,
			    &LOCK_status);
4210

unknown's avatar
unknown committed
4211
	ut_ad(prebuilt->trx ==
4212
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
4213

4214 4215 4216 4217
	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
unknown's avatar
unknown committed
4218
		that MySQL knows of */
4219

unknown's avatar
Merge  
unknown committed
4220
		error = change_active_index(MAX_KEY);
4221
	} else {
unknown's avatar
Merge  
unknown committed
4222
		error = change_active_index(primary_key);
4223
	}
4224

unknown's avatar
Merge  
unknown committed
4225
	if (error) {
unknown's avatar
unknown committed
4226
	        DBUG_PRINT("error", ("Got error: %d", error));
unknown's avatar
Merge  
unknown committed
4227 4228
		DBUG_RETURN(error);
	}
unknown's avatar
unknown committed
4229

unknown's avatar
unknown committed
4230 4231 4232 4233
	/* Note that we assume the length of the row reference is fixed
        for the table, and it is == ref_length */

	error = index_read(buf, pos, ref_length, HA_READ_KEY_EXACT);
unknown's avatar
unknown committed
4234 4235

	if (error) {
unknown's avatar
unknown committed
4236
		DBUG_PRINT("error", ("Got error: %d", error));
unknown's avatar
unknown committed
4237
	}
unknown's avatar
unknown committed
4238

4239
	change_active_index(keynr);
4240

4241 4242 4243 4244
  	DBUG_RETURN(error);
}

/*************************************************************************
4245
Stores a reference to the current row to 'ref' field of the handle. Note
unknown's avatar
unknown committed
4246 4247
that in the case where we have generated the clustered index for the
table, the function parameter is illogical: we MUST ASSUME that 'record'
unknown's avatar
unknown committed
4248
is the current 'position' of the handle, because if row ref is actually
4249
the row id internally generated in InnoDB, then 'record' does not contain
4250 4251
it. We just guess that the row id must be for the record where the handle
was positioned the last time. */
4252 4253 4254 4255

void
ha_innobase::position(
/*==================*/
4256
	const mysql_byte*	record)	/* in: row in MySQL format */
4257
{
4258 4259
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	uint		len;
4260

unknown's avatar
unknown committed
4261
	ut_ad(prebuilt->trx ==
4262
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
4263

4264 4265 4266 4267
	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
unknown's avatar
unknown committed
4268
		that MySQL knows of */
4269 4270 4271 4272 4273

		len = DATA_ROW_ID_LEN;

		memcpy(ref, prebuilt->row_id, len);
	} else {
4274 4275
		len = store_key_val_for_row(primary_key, (char*)ref,
							 ref_length, record);
4276
	}
4277

unknown's avatar
unknown committed
4278 4279
	/* We assume that the 'ref' value len is always fixed for the same
	table. */
unknown's avatar
foo1  
unknown committed
4280

unknown's avatar
unknown committed
4281
	if (len != ref_length) {
4282
	  sql_print_error("Stored ref len is %lu, but table ref len is %lu",
unknown's avatar
foo1  
unknown committed
4283
			  (ulong) len, (ulong) ref_length);
unknown's avatar
unknown committed
4284
	}
4285 4286 4287
}

/*********************************************************************
4288
Creates a table definition to an InnoDB database. */
4289 4290 4291 4292
static
int
create_table_def(
/*=============*/
4293
	trx_t*		trx,		/* in: InnoDB transaction handle */
4294 4295
	TABLE*		form,		/* in: information on table
					columns and indexes */
unknown's avatar
unknown committed
4296
	const char*	table_name,	/* in: table name */
unknown's avatar
unknown committed
4297
	const char*	path_of_temp_table,/* in: if this is a table explicitly
unknown's avatar
unknown committed
4298 4299 4300 4301 4302 4303 4304
					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 */
unknown's avatar
unknown committed
4305
	ibool		comp)		/* in: TRUE=compact record format */
4306 4307 4308 4309 4310 4311
{
	Field*		field;
	dict_table_t*	table;
	ulint		n_cols;
  	int 		error;
  	ulint		col_type;
unknown's avatar
unknown committed
4312
	ulint		col_len;
4313 4314
  	ulint		nulls_allowed;
	ulint		unsigned_type;
unknown's avatar
unknown committed
4315
	ulint		binary_type;
unknown's avatar
unknown committed
4316
	ulint		long_true_varchar;
unknown's avatar
unknown committed
4317
	ulint		charset_no;
4318
  	ulint		i;
4319

4320 4321 4322
  	DBUG_ENTER("create_table_def");
  	DBUG_PRINT("enter", ("table_name: %s", table_name));

4323
	n_cols = form->s->fields;
4324

unknown's avatar
unknown committed
4325 4326
	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
4327

unknown's avatar
unknown committed
4328
	table = dict_mem_table_create(table_name, 0, n_cols, comp);
4329

unknown's avatar
unknown committed
4330 4331 4332 4333 4334
	if (path_of_temp_table) {
		table->dir_path_of_temp_table =
			mem_heap_strdup(table->heap, path_of_temp_table);
	}

4335 4336 4337
	for (i = 0; i < n_cols; i++) {
		field = form->field[i];

unknown's avatar
unknown committed
4338 4339
		col_type = get_innobase_type_from_mysql_type(&unsigned_type,
									field);
4340 4341 4342 4343 4344 4345
		if (field->null_ptr) {
			nulls_allowed = 0;
		} else {
			nulls_allowed = DATA_NOT_NULL;
		}

unknown's avatar
unknown committed
4346
		if (field->binary()) {
unknown's avatar
unknown committed
4347 4348 4349 4350 4351
			binary_type = DATA_BINARY_TYPE;
		} else {
			binary_type = 0;
		}

unknown's avatar
foo1  
unknown committed
4352
		charset_no = 0;
unknown's avatar
unknown committed
4353 4354 4355 4356 4357

		if (dtype_is_string_type(col_type)) {

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

unknown's avatar
unknown committed
4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370
			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. */
unknown's avatar
foo1  
unknown committed
4371

unknown's avatar
unknown committed
4372 4373 4374 4375 4376 4377 4378 4379
		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;
			}
unknown's avatar
unknown committed
4380 4381
		}

unknown's avatar
unknown committed
4382 4383 4384
		dict_mem_table_add_col(table,
					(char*) field->field_name,
					col_type,
unknown's avatar
foo1  
unknown committed
4385
					dtype_form_prtype(
unknown's avatar
unknown committed
4386 4387 4388 4389 4390 4391
					    (ulint)field->type()
					     | nulls_allowed | unsigned_type
					     | binary_type | long_true_varchar,
					    charset_no),
					col_len,
					0);
4392 4393 4394 4395
	}

	error = row_create_table_for_mysql(table, trx);

unknown's avatar
unknown committed
4396
	error = convert_error_code_to_mysql(error, NULL);
4397 4398 4399 4400 4401

	DBUG_RETURN(error);
}

/*********************************************************************
4402
Creates an index in an InnoDB database. */
4403 4404
static
int
4405 4406
create_index(
/*=========*/
4407
	trx_t*		trx,		/* in: InnoDB transaction handle */
4408 4409 4410 4411 4412
	TABLE*		form,		/* in: information on table
					columns and indexes */
	const char*	table_name,	/* in: table name */
	uint		key_num)	/* in: index number */
{
unknown's avatar
unknown committed
4413
	Field*		field;
4414
	dict_index_t*	index;
4415
  	int 		error;
4416 4417 4418 4419
	ulint		n_fields;
	KEY*		key;
	KEY_PART_INFO*	key_part;
	ulint		ind_type;
unknown's avatar
unknown committed
4420 4421
	ulint		col_type;
	ulint		prefix_len;
unknown's avatar
unknown committed
4422
	ulint		is_unsigned;
4423
  	ulint		i;
unknown's avatar
unknown committed
4424
  	ulint		j;
4425
	ulint*		field_lengths;
unknown's avatar
foo1  
unknown committed
4426

4427
  	DBUG_ENTER("create_index");
4428

4429 4430 4431
	key = form->key_info + key_num;

    	n_fields = key->key_parts;
4432

4433 4434
    	ind_type = 0;

4435
    	if (key_num == form->s->primary_key) {
4436 4437
		ind_type = ind_type | DICT_CLUSTERED;
	}
4438

4439 4440 4441 4442
	if (key->flags & HA_NOSAME ) {
		ind_type = ind_type | DICT_UNIQUE;
	}

unknown's avatar
unknown committed
4443 4444
	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
4445 4446 4447

	index = dict_mem_index_create((char*) table_name, key->name, 0,
						ind_type, n_fields);
4448 4449 4450

	field_lengths = (ulint*) my_malloc(sizeof(ulint) * n_fields,
		MYF(MY_FAE));
unknown's avatar
foo1  
unknown committed
4451

4452 4453 4454
	for (i = 0; i < n_fields; i++) {
		key_part = key->key_part + i;

4455
		/* (The flag HA_PART_KEY_SEG denotes in MySQL a column prefix
unknown's avatar
unknown committed
4456 4457 4458 4459
		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. */
unknown's avatar
foo1  
unknown committed
4460

unknown's avatar
unknown committed
4461
		field = NULL;
4462
		for (j = 0; j < form->s->fields; j++) {
unknown's avatar
unknown committed
4463 4464 4465

			field = form->field[j];

4466 4467 4468
			if (0 == innobase_strcasecmp(
					field->field_name,
					key_part->field->field_name)) {
unknown's avatar
unknown committed
4469 4470 4471 4472 4473 4474
				/* Found the corresponding column */

				break;
			}
		}

4475
		ut_a(j < form->s->fields);
unknown's avatar
unknown committed
4476

unknown's avatar
unknown committed
4477 4478
		col_type = get_innobase_type_from_mysql_type(
					&is_unsigned, key_part->field);
unknown's avatar
unknown committed
4479 4480

		if (DATA_BLOB == col_type
unknown's avatar
unknown committed
4481 4482 4483 4484 4485
		    || (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)) {
unknown's avatar
unknown committed
4486

unknown's avatar
unknown committed
4487 4488 4489 4490 4491 4492
		        prefix_len = key_part->length;

			if (col_type == DATA_INT
			    || col_type == DATA_FLOAT
			    || col_type == DATA_DOUBLE
			    || col_type == DATA_DECIMAL) {
4493 4494 4495 4496 4497 4498
			  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);
unknown's avatar
foo1  
unknown committed
4499

unknown's avatar
unknown committed
4500 4501 4502 4503
			        prefix_len = 0;
			}
		} else {
		        prefix_len = 0;
unknown's avatar
unknown committed
4504 4505
		}

4506 4507
		field_lengths[i] = key_part->length;

4508 4509
		/* We assume all fields should be sorted in ascending
		order, hence the '0': */
unknown's avatar
unknown committed
4510

4511
		dict_mem_index_add_field(index,
unknown's avatar
unknown committed
4512 4513
				(char*) key_part->field->field_name,
				0, prefix_len);
4514 4515
	}

4516 4517 4518
	/* 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. */
4519
	error = row_create_index_for_mysql(index, trx, field_lengths);
4520

unknown's avatar
unknown committed
4521
	error = convert_error_code_to_mysql(error, NULL);
4522

4523
	my_free((gptr) field_lengths, MYF(0));
unknown's avatar
foo1  
unknown committed
4524

4525 4526 4527 4528
	DBUG_RETURN(error);
}

/*********************************************************************
4529
Creates an index to an InnoDB table when the user has defined no
4530
primary index. */
4531 4532
static
int
4533 4534
create_clustered_index_when_no_primary(
/*===================================*/
4535
	trx_t*		trx,		/* in: InnoDB transaction handle */
4536 4537 4538
	const char*	table_name)	/* in: table name */
{
	dict_index_t*	index;
4539 4540
  	int 		error;

unknown's avatar
unknown committed
4541 4542
	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
4543

unknown's avatar
unknown committed
4544 4545 4546
	index = dict_mem_index_create((char*) table_name,
				      (char*) "GEN_CLUST_INDEX",
				      0, DICT_CLUSTERED, 0);
4547
	error = row_create_index_for_mysql(index, trx, NULL);
4548

unknown's avatar
unknown committed
4549
	error = convert_error_code_to_mysql(error, NULL);
4550

4551
	return(error);
4552 4553 4554
}

/*********************************************************************
4555
Creates a new table to an InnoDB database. */
4556 4557 4558 4559 4560 4561 4562 4563

int
ha_innobase::create(
/*================*/
					/* out: error number */
	const char*	name,		/* in: table name */
	TABLE*		form,		/* in: information on table
					columns and indexes */
4564 4565 4566
	HA_CREATE_INFO*	create_info)	/* in: more information of the
					created table, contains also the
					create statement string */
4567 4568 4569
{
	int		error;
	dict_table_t*	innobase_table;
unknown's avatar
unknown committed
4570
	trx_t*		parent_trx;
4571
	trx_t*		trx;
unknown's avatar
unknown committed
4572
	int		primary_key_no;
4573
	uint		i;
unknown's avatar
unknown committed
4574 4575
	char		name2[FN_REFLEN];
	char		norm_name[FN_REFLEN];
unknown's avatar
unknown committed
4576
	THD		*thd= current_thd;
4577
	ib_longlong     auto_inc_value;
4578

4579 4580
  	DBUG_ENTER("ha_innobase::create");

unknown's avatar
unknown committed
4581
	DBUG_ASSERT(thd != NULL);
unknown's avatar
unknown committed
4582

4583
	if (form->s->fields > 1000) {
unknown's avatar
unknown committed
4584 4585 4586
		/* The limit probably should be REC_MAX_N_FIELDS - 3 = 1020,
		but we play safe here */

unknown's avatar
unknown committed
4587
	        DBUG_RETURN(HA_ERR_TO_BIG_ROW);
unknown's avatar
foo1  
unknown committed
4588
	}
unknown's avatar
unknown committed
4589

unknown's avatar
unknown committed
4590 4591
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
unknown's avatar
foo1  
unknown committed
4592

unknown's avatar
unknown committed
4593
	parent_trx = check_trx_exists(current_thd);
unknown's avatar
unknown committed
4594 4595 4596 4597

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

unknown's avatar
foo1  
unknown committed
4598
	trx_search_latch_release_if_reserved(parent_trx);
unknown's avatar
foo2  
unknown committed
4599

4600
	trx = trx_allocate_for_mysql();
unknown's avatar
foo1  
unknown committed
4601

unknown's avatar
unknown committed
4602 4603
	trx->mysql_thd = thd;
	trx->mysql_query_str = &((*thd).query);
4604

unknown's avatar
unknown committed
4605
	if (thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
unknown's avatar
unknown committed
4606 4607 4608
		trx->check_foreigns = FALSE;
	}

unknown's avatar
unknown committed
4609
	if (thd->options & OPTION_RELAXED_UNIQUE_CHECKS) {
unknown's avatar
unknown committed
4610 4611 4612
		trx->check_unique_secondary = FALSE;
	}

unknown's avatar
unknown committed
4613 4614 4615 4616 4617
	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}
unknown's avatar
unknown committed
4618

unknown's avatar
unknown committed
4619
	fn_format(name2, name, "", "", 2);	// Remove the .frm extension
4620 4621

	normalize_table_name(norm_name, name2);
4622

unknown's avatar
unknown committed
4623
	/* Latch the InnoDB data dictionary exclusively so that no deadlocks
unknown's avatar
unknown committed
4624
	or lock waits can happen in it during a table create operation.
unknown's avatar
unknown committed
4625
	Drop table etc. do this latching in row0mysql.c. */
unknown's avatar
unknown committed
4626

unknown's avatar
unknown committed
4627
	row_mysql_lock_data_dictionary(trx);
unknown's avatar
unknown committed
4628 4629

	/* Create the table definition in InnoDB */
4630

unknown's avatar
unknown committed
4631 4632
	error = create_table_def(trx, form, norm_name,
		create_info->options & HA_LEX_CREATE_TMP_TABLE ? name2 : NULL,
4633
		form->s->row_type != ROW_TYPE_REDUNDANT);
unknown's avatar
unknown committed
4634

unknown's avatar
unknown committed
4635
  	if (error) {
4636
		goto cleanup;
4637 4638
 	}

4639 4640
	/* Look for a primary key */

4641
	primary_key_no= (table->s->primary_key != MAX_KEY ?
unknown's avatar
foo1  
unknown committed
4642
			 (int) table->s->primary_key :
unknown's avatar
unknown committed
4643
			 -1);
4644

4645 4646 4647
	/* Our function row_get_mysql_key_number_for_index assumes
	the primary key is always number 0, if it exists */

unknown's avatar
unknown committed
4648
	DBUG_ASSERT(primary_key_no == -1 || primary_key_no == 0);
4649

4650 4651
	/* Create the keys */

4652
	if (form->s->keys == 0 || primary_key_no == -1) {
4653 4654
		/* Create an index which is used as the clustered index;
		order the rows by their row id which is internally generated
4655
		by InnoDB */
4656

4657
		error = create_clustered_index_when_no_primary(trx,
4658
							norm_name);
4659
  		if (error) {
4660
			goto cleanup;
4661
      		}
4662 4663 4664
	}

	if (primary_key_no != -1) {
4665
		/* In InnoDB the clustered index must always be created
4666
		first */
unknown's avatar
unknown committed
4667 4668
	    	if ((error = create_index(trx, form, norm_name,
					  (uint) primary_key_no))) {
4669
			goto cleanup;
4670 4671 4672
      		}
      	}

4673
	for (i = 0; i < form->s->keys; i++) {
4674 4675 4676

		if (i != (uint) primary_key_no) {

unknown's avatar
unknown committed
4677
    			if ((error = create_index(trx, form, norm_name, i))) {
4678
				goto cleanup;
4679
      			}
4680
      		}
4681
  	}
4682

unknown's avatar
unknown committed
4683
	if (current_thd->query != NULL) {
unknown's avatar
unknown committed
4684
		LEX_STRING q;
unknown's avatar
unknown committed
4685

unknown's avatar
unknown committed
4686 4687 4688 4689 4690
		if (thd->convert_string(&q, system_charset_info,
					current_thd->query,
					current_thd->query_length,
					current_thd->charset())) {
			error = HA_ERR_OUT_OF_MEM;
unknown's avatar
foo1  
unknown committed
4691

4692
			goto cleanup;
unknown's avatar
unknown committed
4693
		}
4694

4695 4696 4697
		error = row_table_add_foreign_constraints(trx,
			q.str, norm_name,
			create_info->options & HA_LEX_CREATE_TMP_TABLE);
4698

4699
		error = convert_error_code_to_mysql(error, NULL);
4700

4701 4702
		if (error) {
			goto cleanup;
4703
		}
4704 4705
	}

unknown's avatar
unknown committed
4706 4707
  	innobase_commit_low(trx);

unknown's avatar
unknown committed
4708
	row_mysql_unlock_data_dictionary(trx);
4709

unknown's avatar
Merge  
unknown committed
4710 4711 4712
	/* 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 */
unknown's avatar
unknown committed
4713

unknown's avatar
unknown committed
4714
	log_buffer_flush_to_disk();
unknown's avatar
Merge  
unknown committed
4715

4716
	innobase_table = dict_table_get(norm_name, NULL);
4717

unknown's avatar
unknown committed
4718
	DBUG_ASSERT(innobase_table != 0);
4719

4720 4721
	if ((create_info->used_fields & HA_CREATE_USED_AUTO) &&
	   (create_info->auto_increment_value != 0)) {
4722

unknown's avatar
foo1  
unknown committed
4723
		/* Query was ALTER TABLE...AUTO_INCREMENT = x; or
4724
		CREATE TABLE ...AUTO_INCREMENT = x; Find out a table
4725 4726
		definition from the dictionary and get the current value
		of the auto increment field. Set a new value to the
4727 4728
		auto increment field if the value is greater than the
		maximum value in the column. */
4729

4730
		auto_inc_value = create_info->auto_increment_value;
4731 4732 4733
		dict_table_autoinc_initialize(innobase_table, auto_inc_value);
	}

4734
	/* Tell the InnoDB server that there might be work for
4735 4736 4737 4738 4739 4740 4741
	utility threads: */

	srv_active_wake_master_thread();

  	trx_free_for_mysql(trx);

	DBUG_RETURN(0);
4742 4743 4744

cleanup:
	innobase_commit_low(trx);
unknown's avatar
foo1  
unknown committed
4745

4746
	row_mysql_unlock_data_dictionary(trx);
unknown's avatar
foo1  
unknown committed
4747

4748 4749 4750
	trx_free_for_mysql(trx);

	DBUG_RETURN(error);
4751 4752
}

unknown's avatar
unknown committed
4753 4754 4755 4756 4757 4758 4759 4760 4761 4762
/*********************************************************************
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 */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
4763
	dict_table_t*	dict_table;
unknown's avatar
unknown committed
4764 4765 4766 4767 4768 4769 4770
	trx_t*		trx;
	int		err;

 	DBUG_ENTER("ha_innobase::discard_or_import_tablespace");

	ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);
	ut_a(prebuilt->trx ==
4771
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
4772

4773
	dict_table = prebuilt->table;
unknown's avatar
unknown committed
4774 4775 4776
	trx = prebuilt->trx;

	if (discard) {
4777
		err = row_discard_tablespace_for_mysql(dict_table->name, trx);
unknown's avatar
unknown committed
4778
	} else {
4779
		err = row_import_tablespace_for_mysql(dict_table->name, trx);
unknown's avatar
unknown committed
4780 4781
	}

unknown's avatar
unknown committed
4782
	err = convert_error_code_to_mysql(err, NULL);
unknown's avatar
unknown committed
4783

unknown's avatar
unknown committed
4784
	DBUG_RETURN(err);
unknown's avatar
unknown committed
4785 4786
}

4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826
/*********************************************************************
Deletes all rows of an InnoDB table. */

int
ha_innobase::delete_all_rows(void)
/*==============================*/
				/* out: error number */
{
	row_prebuilt_t*	prebuilt	= (row_prebuilt_t*)innobase_prebuilt;
	int		error;
	trx_t*		trx;
	THD*		thd		= current_thd;

	DBUG_ENTER("ha_innobase::delete_all_rows");

	if (thd->lex->sql_command != SQLCOM_TRUNCATE) {
	fallback:
		/* We only handle TRUNCATE TABLE t as a special case.
		DELETE FROM t will have to use ha_innobase::delete_row(). */
		DBUG_RETURN(my_errno=HA_ERR_WRONG_COMMAND);
	}

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

	trx = check_trx_exists(thd);

	/* Truncate the table in InnoDB */

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

4827
/*********************************************************************
4828
Drops a table from an InnoDB database. Before calling this function,
unknown's avatar
unknown committed
4829 4830
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
4831 4832
operation inside InnoDB will remove all locks any user has on the table
inside InnoDB. */
4833 4834 4835 4836

int
ha_innobase::delete_table(
/*======================*/
unknown's avatar
unknown committed
4837 4838
				/* out: error number */
	const char*	name)	/* in: table name */
4839 4840 4841
{
	ulint	name_len;
	int	error;
unknown's avatar
unknown committed
4842
	trx_t*	parent_trx;
4843
	trx_t*	trx;
unknown's avatar
unknown committed
4844
	THD     *thd= current_thd;
4845
	char	norm_name[1000];
unknown's avatar
unknown committed
4846

unknown's avatar
unknown committed
4847
 	DBUG_ENTER("ha_innobase::delete_table");
4848

unknown's avatar
unknown committed
4849 4850
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
unknown's avatar
foo1  
unknown committed
4851

unknown's avatar
unknown committed
4852
	parent_trx = check_trx_exists(current_thd);
unknown's avatar
unknown committed
4853 4854 4855 4856

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

unknown's avatar
foo1  
unknown committed
4857
	trx_search_latch_release_if_reserved(parent_trx);
unknown's avatar
unknown committed
4858

unknown's avatar
unknown committed
4859 4860 4861 4862 4863 4864
	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

4865 4866
	trx = trx_allocate_for_mysql();

unknown's avatar
unknown committed
4867 4868
	trx->mysql_thd = current_thd;
	trx->mysql_query_str = &((*current_thd).query);
unknown's avatar
unknown committed
4869

unknown's avatar
unknown committed
4870 4871 4872 4873 4874 4875 4876 4877
	if (thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
		trx->check_foreigns = FALSE;
	}

	if (thd->options & OPTION_RELAXED_UNIQUE_CHECKS) {
		trx->check_unique_secondary = FALSE;
	}

4878 4879 4880
	name_len = strlen(name);

	assert(name_len < 1000);
4881

4882 4883
	/* Strangely, MySQL passes the table name without the '.frm'
	extension, in contrast to ::create */
4884

4885 4886
	normalize_table_name(norm_name, name);

4887
  	/* Drop the table in InnoDB */
4888

4889
	error = row_drop_table_for_mysql(norm_name, trx,
unknown's avatar
unknown committed
4890
		thd->lex->sql_command == SQLCOM_DROP_DB);
4891

unknown's avatar
Merge  
unknown committed
4892 4893 4894
	/* 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 */
unknown's avatar
unknown committed
4895

unknown's avatar
unknown committed
4896
	log_buffer_flush_to_disk();
unknown's avatar
Merge  
unknown committed
4897

4898
	/* Tell the InnoDB server that there might be work for
4899 4900 4901 4902
	utility threads: */

	srv_active_wake_master_thread();

unknown's avatar
unknown committed
4903
  	innobase_commit_low(trx);
unknown's avatar
unknown committed
4904

4905 4906
  	trx_free_for_mysql(trx);

unknown's avatar
unknown committed
4907
	error = convert_error_code_to_mysql(error, NULL);
4908 4909 4910 4911

	DBUG_RETURN(error);
}

4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924
/*********************************************************************
Removes all tables in the named database inside InnoDB. */

int
innobase_drop_database(
/*===================*/
			/* out: error number */
	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;
unknown's avatar
unknown committed
4925
	trx_t*	parent_trx;
4926 4927 4928
	trx_t*	trx;
	char*	ptr;
	int	error;
4929
	char*	namebuf;
unknown's avatar
unknown committed
4930

unknown's avatar
unknown committed
4931 4932
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
unknown's avatar
foo1  
unknown committed
4933

unknown's avatar
unknown committed
4934
	parent_trx = check_trx_exists(current_thd);
unknown's avatar
unknown committed
4935 4936 4937 4938

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

unknown's avatar
foo1  
unknown committed
4939
	trx_search_latch_release_if_reserved(parent_trx);
unknown's avatar
unknown committed
4940

4941
	ptr = strend(path) - 2;
unknown's avatar
unknown committed
4942

4943 4944 4945 4946 4947 4948
	while (ptr >= path && *ptr != '\\' && *ptr != '/') {
		ptr--;
		len++;
	}

	ptr++;
unknown's avatar
unknown committed
4949
	namebuf = my_malloc((uint) len + 2, MYF(0));
4950 4951 4952 4953

	memcpy(namebuf, ptr, len);
	namebuf[len] = '/';
	namebuf[len + 1] = '\0';
unknown's avatar
unknown committed
4954
#ifdef  __WIN__
4955
	innobase_casedn_str(namebuf);
unknown's avatar
unknown committed
4956
#endif
4957
	trx = trx_allocate_for_mysql();
unknown's avatar
unknown committed
4958 4959
	trx->mysql_thd = current_thd;
	trx->mysql_query_str = &((*current_thd).query);
4960

unknown's avatar
unknown committed
4961 4962 4963 4964
	if (current_thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
		trx->check_foreigns = FALSE;
	}

4965
  	error = row_drop_database_for_mysql(namebuf, trx);
4966
	my_free(namebuf, MYF(0));
4967

unknown's avatar
Merge  
unknown committed
4968 4969 4970
	/* 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 */
unknown's avatar
unknown committed
4971

unknown's avatar
unknown committed
4972
	log_buffer_flush_to_disk();
unknown's avatar
Merge  
unknown committed
4973

4974 4975 4976 4977 4978
	/* Tell the InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

unknown's avatar
unknown committed
4979
  	innobase_commit_low(trx);
4980 4981
  	trx_free_for_mysql(trx);

unknown's avatar
unknown committed
4982
	error = convert_error_code_to_mysql(error, NULL);
4983 4984 4985 4986

	return(error);
}

4987
/*************************************************************************
4988
Renames an InnoDB table. */
4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999

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;
unknown's avatar
unknown committed
5000
	trx_t*	parent_trx;
5001
	trx_t*	trx;
5002 5003
	char	norm_from[1000];
	char	norm_to[1000];
5004

5005 5006
  	DBUG_ENTER("ha_innobase::rename_table");

unknown's avatar
unknown committed
5007 5008
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
unknown's avatar
foo1  
unknown committed
5009

unknown's avatar
unknown committed
5010
	parent_trx = check_trx_exists(current_thd);
unknown's avatar
unknown committed
5011 5012 5013 5014

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

unknown's avatar
foo1  
unknown committed
5015
	trx_search_latch_release_if_reserved(parent_trx);
unknown's avatar
unknown committed
5016

unknown's avatar
unknown committed
5017 5018 5019 5020 5021 5022
	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

5023
	trx = trx_allocate_for_mysql();
unknown's avatar
unknown committed
5024 5025
	trx->mysql_thd = current_thd;
	trx->mysql_query_str = &((*current_thd).query);
5026

5027 5028 5029 5030
	if (current_thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
		trx->check_foreigns = FALSE;
	}

5031 5032 5033 5034 5035
	name_len1 = strlen(from);
	name_len2 = strlen(to);

	assert(name_len1 < 1000);
	assert(name_len2 < 1000);
5036

5037 5038 5039
	normalize_table_name(norm_from, from);
	normalize_table_name(norm_to, to);

5040
  	/* Rename the table in InnoDB */
5041

5042
  	error = row_rename_table_for_mysql(norm_from, norm_to, trx);
5043

unknown's avatar
Merge  
unknown committed
5044 5045 5046
	/* 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 */
unknown's avatar
unknown committed
5047

unknown's avatar
unknown committed
5048
	log_buffer_flush_to_disk();
unknown's avatar
Merge  
unknown committed
5049

5050
	/* Tell the InnoDB server that there might be work for
5051 5052 5053 5054
	utility threads: */

	srv_active_wake_master_thread();

unknown's avatar
unknown committed
5055
  	innobase_commit_low(trx);
5056 5057
  	trx_free_for_mysql(trx);

unknown's avatar
unknown committed
5058
	error = convert_error_code_to_mysql(error, NULL);
5059 5060 5061 5062 5063 5064 5065 5066 5067 5068

	DBUG_RETURN(error);
}

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

ha_rows
ha_innobase::records_in_range(
/*==========================*/
unknown's avatar
unknown committed
5069 5070
						/* out: estimated number of
						rows */
unknown's avatar
unknown committed
5071 5072 5073 5074 5075
	uint 			keynr,		/* in: index number */
        key_range		*min_key,	/* in: start key value of the
                                                   range, may also be 0 */
	key_range		*max_key)	/* in: range end key val, may
                                                   also be 0 */
5076 5077 5078 5079
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	KEY*		key;
	dict_index_t*	index;
5080
	mysql_byte*	key_val_buff2 	= (mysql_byte*) my_malloc(
5081
						  table->s->reclength
unknown's avatar
unknown committed
5082
      					+ table->s->max_key_length + 100,
unknown's avatar
unknown committed
5083
								MYF(MY_FAE));
5084
	ulint		buff2_len = table->s->reclength
unknown's avatar
unknown committed
5085
      					+ table->s->max_key_length + 100;
5086
	dtuple_t*	range_start;
5087
	dtuple_t*	range_end;
unknown's avatar
unknown committed
5088
	ib_longlong	n_rows;
5089 5090
	ulint		mode1;
	ulint		mode2;
5091 5092
	void*           heap1;
	void*           heap2;
5093

5094
   	DBUG_ENTER("records_in_range");
5095

unknown's avatar
unknown committed
5096 5097
	prebuilt->trx->op_info = (char*)"estimating records in index range";

unknown's avatar
unknown committed
5098 5099 5100 5101
	/* 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);
unknown's avatar
unknown committed
5102

5103 5104 5105
	active_index = keynr;

	key = table->key_info + active_index;
5106

5107
	index = dict_table_get_index_noninline(prebuilt->table, key->name);
5108

5109
	range_start = dtuple_create_for_mysql(&heap1, key->key_parts);
5110
 	dict_index_copy_types(range_start, index, key->key_parts);
5111

5112
	range_end = dtuple_create_for_mysql(&heap2, key->key_parts);
5113
 	dict_index_copy_types(range_end, index, key->key_parts);
5114

5115
	row_sel_convert_mysql_key_to_innobase(
unknown's avatar
unknown committed
5116 5117 5118
				range_start, (byte*) key_val_buff,
				(ulint)upd_and_key_val_buff_len,
				index,
unknown's avatar
unknown committed
5119 5120
				(byte*) (min_key ? min_key->key :
                                         (const mysql_byte*) 0),
5121 5122
				(ulint) (min_key ? min_key->length : 0),
				prebuilt->trx);
5123

5124
	row_sel_convert_mysql_key_to_innobase(
unknown's avatar
unknown committed
5125 5126
				range_end, (byte*) key_val_buff2,
				buff2_len, index,
unknown's avatar
unknown committed
5127 5128
				(byte*) (max_key ? max_key->key :
                                         (const mysql_byte*) 0),
5129 5130
				(ulint) (max_key ? max_key->length : 0),
				prebuilt->trx);
unknown's avatar
unknown committed
5131 5132 5133 5134 5135

	mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag :
                                                HA_READ_KEY_EXACT);
	mode2 = convert_search_mode_to_innobase(max_key ? max_key->flag :
                                                HA_READ_KEY_EXACT);
5136

5137
	n_rows = btr_estimate_n_rows_in_range(index, range_start,
5138
						mode1, range_end, mode2);
5139 5140
	dtuple_free_for_mysql(heap1);
	dtuple_free_for_mysql(heap2);
5141

unknown's avatar
unknown committed
5142
    	my_free((gptr) key_val_buff2, MYF(0));
5143

unknown's avatar
unknown committed
5144 5145
	prebuilt->trx->op_info = (char*)"";

unknown's avatar
unknown committed
5146 5147 5148 5149 5150 5151 5152 5153 5154 5155
	/* 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) {
	        n_rows = 1;
	}

5156 5157 5158
	DBUG_RETURN((ha_rows) n_rows);
}

5159 5160
/*************************************************************************
Gives an UPPER BOUND to the number of rows in a table. This is used in
unknown's avatar
unknown committed
5161
filesort.cc. */
5162 5163

ha_rows
unknown's avatar
unknown committed
5164
ha_innobase::estimate_rows_upper_bound(void)
5165
/*======================================*/
5166
			/* out: upper bound of rows */
5167 5168
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
5169 5170
	dict_index_t*	index;
	ulonglong	estimate;
5171
	ulonglong	local_data_file_length;
unknown's avatar
unknown committed
5172

unknown's avatar
unknown committed
5173
 	DBUG_ENTER("estimate_rows_upper_bound");
5174

unknown's avatar
unknown committed
5175 5176 5177 5178 5179 5180
	/* 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(current_thd);

unknown's avatar
unknown committed
5181 5182 5183
	prebuilt->trx->op_info = (char*)
	                         "calculating upper bound for table rows";

unknown's avatar
unknown committed
5184 5185 5186 5187
	/* 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);
5188

5189
	index = dict_table_get_first_index_noninline(prebuilt->table);
unknown's avatar
unknown committed
5190

5191
	local_data_file_length = ((ulonglong) index->stat_n_leaf_pages)
5192
    							* UNIV_PAGE_SIZE;
5193

unknown's avatar
unknown committed
5194 5195
	/* Calculate a minimum length for a clustered index record and from
	that an upper bound for the number of rows. Since we only calculate
unknown's avatar
unknown committed
5196 5197
	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. */
unknown's avatar
unknown committed
5198

unknown's avatar
unknown committed
5199 5200
	estimate = 2 * local_data_file_length /
					 dict_index_calc_min_rec_len(index);
unknown's avatar
unknown committed
5201

unknown's avatar
unknown committed
5202 5203
	prebuilt->trx->op_info = (char*)"";

unknown's avatar
unknown committed
5204
	DBUG_RETURN((ha_rows) estimate);
5205 5206
}

5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218
/*************************************************************************
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 */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;

unknown's avatar
unknown committed
5219 5220 5221 5222
	/* 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. */
unknown's avatar
foo1  
unknown committed
5223

unknown's avatar
unknown committed
5224
	return((double) (prebuilt->table->stat_clustered_index_size));
5225 5226
}

unknown's avatar
unknown committed
5227 5228 5229
/**********************************************************************
Calculate the time it takes to read a set of ranges through an index
This enables us to optimise reads for clustered indexes. */
unknown's avatar
unknown committed
5230

unknown's avatar
unknown committed
5231 5232 5233 5234 5235 5236 5237
double
ha_innobase::read_time(
/*===================*/
			/* out: estimated time measured in disk seeks */
	uint    index,	/* in: key number */
	uint	ranges,	/* in: how many ranges */
	ha_rows rows)	/* in: estimated number of rows in the ranges */
unknown's avatar
unknown committed
5238
{
unknown's avatar
unknown committed
5239 5240
	ha_rows total_rows;
	double  time_for_scan;
unknown's avatar
foo1  
unknown committed
5241

unknown's avatar
unknown committed
5242
	if (index != table->s->primary_key) {
unknown's avatar
foo1  
unknown committed
5243
		/* Not clustered */
unknown's avatar
unknown committed
5244 5245
	  	return(handler::read_time(index, ranges, rows));
	}
unknown's avatar
unknown committed
5246

unknown's avatar
unknown committed
5247
	if (rows <= 2) {
unknown's avatar
unknown committed
5248

unknown's avatar
unknown committed
5249 5250
		return((double) rows);
	}
unknown's avatar
unknown committed
5251 5252 5253 5254

	/* Assume that the read time is proportional to the scan time for all
	rows + at most one seek per range. */

unknown's avatar
unknown committed
5255
	time_for_scan = scan_time();
unknown's avatar
unknown committed
5256

unknown's avatar
unknown committed
5257
	if ((total_rows = estimate_rows_upper_bound()) < rows) {
unknown's avatar
unknown committed
5258

unknown's avatar
unknown committed
5259 5260
	  	return(time_for_scan);
	}
unknown's avatar
unknown committed
5261

unknown's avatar
unknown committed
5262
	return(ranges + (double) rows / (double) total_rows * time_for_scan);
unknown's avatar
unknown committed
5263 5264
}

5265 5266 5267 5268
/*************************************************************************
Returns statistics information of the table to the MySQL interpreter,
in various fields of the handle object. */

5269
int
5270 5271 5272 5273 5274 5275 5276
ha_innobase::info(
/*==============*/
	uint flag)	/* in: what information MySQL requests */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	dict_table_t*	ib_table;
	dict_index_t*	index;
5277
	ha_rows		rec_per_key;
unknown's avatar
unknown committed
5278
	ib_longlong	n_rows;
5279 5280
	ulong		j;
	ulong		i;
5281 5282
	char		path[FN_REFLEN];
	os_file_stat_t  stat_info;
5283

5284 5285
 	DBUG_ENTER("info");

unknown's avatar
unknown committed
5286 5287 5288 5289 5290 5291
        /* If we are forcing recovery at a high level, we will suppress
	statistics calculation on tables, because that may crash the
	server if an index is badly corrupted. */

        if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {

5292
                DBUG_RETURN(HA_ERR_CRASHED);
unknown's avatar
unknown committed
5293 5294
        }

unknown's avatar
unknown committed
5295 5296 5297 5298 5299 5300 5301 5302 5303
	/* 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(current_thd);

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

unknown's avatar
unknown committed
5304 5305
	prebuilt->trx->op_info = (char*)"returning various info to MySQL";

unknown's avatar
unknown committed
5306
	trx_search_latch_release_if_reserved(prebuilt->trx);
unknown's avatar
unknown committed
5307

5308 5309 5310 5311 5312 5313
 	ib_table = prebuilt->table;

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

unknown's avatar
unknown committed
5314 5315
	        prebuilt->trx->op_info = (char*)"updating table statistics";

5316
 		dict_update_statistics(ib_table);
unknown's avatar
unknown committed
5317 5318 5319

		prebuilt->trx->op_info = (char*)
		                          "returning various info to MySQL";
5320
		my_snprintf(path, sizeof(path), "%s/%s%s",
5321 5322
				    mysql_data_home, ib_table->name,
				    reg_ext);
unknown's avatar
foo1  
unknown committed
5323

5324
		unpack_filename(path,path);
5325

unknown's avatar
foo1  
unknown committed
5326
		/* Note that we do not know the access time of the table,
5327 5328
		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */

5329 5330 5331
		if (os_file_get_status(path,&stat_info)) {
			create_time = stat_info.ctime;
		}
5332 5333 5334
 	}

	if (flag & HA_STATUS_VARIABLE) {
unknown's avatar
unknown committed
5335 5336 5337 5338 5339 5340 5341 5342 5343 5344
		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
unknown's avatar
unknown committed
5345
		HA_STATUS_TIME flag set, while the left join optimizer does not
unknown's avatar
unknown committed
5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358
		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++;
		}

    		records = (ha_rows)n_rows;
5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371
    		deleted = 0;
    		data_file_length = ((ulonglong)
				ib_table->stat_clustered_index_size)
    					* UNIV_PAGE_SIZE;
    		index_file_length = ((ulonglong)
				ib_table->stat_sum_of_other_index_sizes)
    					* UNIV_PAGE_SIZE;
    		delete_length = 0;
    		check_time = 0;

    		if (records == 0) {
    			mean_rec_length = 0;
    		} else {
5372
    			mean_rec_length = (ulong) (data_file_length / records);
5373 5374 5375 5376 5377 5378 5379 5380 5381
    		}
    	}

	if (flag & HA_STATUS_CONST) {
		index = dict_table_get_first_index_noninline(ib_table);

		if (prebuilt->clust_index_was_generated) {
			index = dict_table_get_next_index_noninline(index);
		}
5382

5383
		for (i = 0; i < table->s->keys; i++) {
unknown's avatar
unknown committed
5384 5385
			if (index == NULL) {
				ut_print_timestamp(stderr);
unknown's avatar
unknown committed
5386
				sql_print_error("Table %s contains fewer "
5387 5388 5389 5390
						"indexes inside InnoDB than "
						"are defined in the MySQL "
						".frm file. Have you mixed up "
						".frm files from different "
unknown's avatar
unknown committed
5391 5392 5393
						"installations? See "
"http://dev.mysql.com/doc/refman/5.0/en/innodb-troubleshooting.html\n",

5394
						ib_table->name);
unknown's avatar
unknown committed
5395 5396 5397
				break;
			}

5398 5399
			for (j = 0; j < table->key_info[i].key_parts; j++) {

unknown's avatar
unknown committed
5400 5401
				if (j + 1 > index->n_uniq) {
				        ut_print_timestamp(stderr);
unknown's avatar
unknown committed
5402 5403 5404 5405 5406
					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/5.0/en/innodb-troubleshooting.html\n",
5407 5408 5409 5410
							index->name,
							ib_table->name,
							(unsigned long)
							index->n_uniq, j + 1);
unknown's avatar
unknown committed
5411 5412 5413
				        break;
				}

5414 5415 5416 5417
				if (index->stat_n_diff_key_vals[j + 1] == 0) {

					rec_per_key = records;
				} else {
5418
					rec_per_key = (ha_rows)(records /
5419 5420 5421
   				         index->stat_n_diff_key_vals[j + 1]);
				}

unknown's avatar
unknown committed
5422 5423 5424 5425 5426 5427 5428
				/* 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;

5429 5430 5431
				if (rec_per_key == 0) {
					rec_per_key = 1;
				}
unknown's avatar
unknown committed
5432

5433 5434 5435
 				table->key_info[i].rec_per_key[j]=
				  rec_per_key >= ~(ulong) 0 ? ~(ulong) 0 :
				  rec_per_key;
5436
			}
unknown's avatar
unknown committed
5437

5438
			index = dict_table_get_next_index_noninline(index);
5439 5440
		}
	}
5441 5442

  	if (flag & HA_STATUS_ERRKEY) {
unknown's avatar
unknown committed
5443 5444
		ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);

5445
		errkey = (unsigned int) row_get_mysql_key_number_for_index(
5446 5447
				       (dict_index_t*)
				       trx_get_error_info(prebuilt->trx));
5448 5449
  	}

unknown's avatar
unknown committed
5450 5451 5452 5453 5454 5455
	if (flag & HA_STATUS_AUTO && table->found_next_number_field) {
		longlong	auto_inc;
		int		ret;

		/* The following function call can the first time fail in
		a lock wait timeout error because it reserves the auto-inc
unknown's avatar
unknown committed
5456
		lock on the table. If it fails, then someone is already initing
unknown's avatar
unknown committed
5457 5458 5459
		the auto-inc counter, and the second call is guaranteed to
		succeed. */

unknown's avatar
foo1  
unknown committed
5460
		ret = innobase_read_and_init_auto_inc(&auto_inc);
unknown's avatar
unknown committed
5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472

		if (ret != 0) {
			ret = innobase_read_and_init_auto_inc(&auto_inc);

			if (ret != 0) {
				ut_print_timestamp(stderr);
				sql_print_error("Cannot get table %s auto-inc"
						"counter value in ::info\n",
						ib_table->name);
				auto_inc = 0;
			}
		}
unknown's avatar
foo1  
unknown committed
5473

unknown's avatar
unknown committed
5474 5475 5476
		auto_increment_value = auto_inc;
	}

unknown's avatar
unknown committed
5477 5478
	prebuilt->trx->op_info = (char*)"";

5479
  	DBUG_RETURN(0);
5480 5481
}

unknown's avatar
unknown committed
5482
/**************************************************************************
unknown's avatar
unknown committed
5483 5484
Updates index cardinalities of the table, based on 8 random dives into
each index tree. This does NOT calculate exact statistics on the table. */
unknown's avatar
unknown committed
5485 5486 5487

int
ha_innobase::analyze(
unknown's avatar
foo1  
unknown committed
5488
/*=================*/
unknown's avatar
unknown committed
5489 5490 5491 5492 5493 5494 5495 5496 5497 5498
					/* out: returns always 0 (success) */
	THD*		thd,		/* in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: currently ignored */
{
	/* Simply call ::info() with all the flags */
	info(HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE);

	return(0);
}

unknown's avatar
unknown committed
5499
/**************************************************************************
5500 5501
This is mapped to "ALTER TABLE tablename TYPE=InnoDB", which rebuilds
the table in MySQL. */
5502

unknown's avatar
unknown committed
5503 5504 5505 5506 5507
int
ha_innobase::optimize(
/*==================*/
	THD*		thd,		/* in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: currently ignored */
5508
{
5509
        return(HA_ADMIN_TRY_ALTER);
5510 5511
}

unknown's avatar
unknown committed
5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527
/***********************************************************************
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 */
	THD* 		thd,		/* in: user thread handle */
	HA_CHECK_OPT* 	check_opt)	/* in: check options, currently
					ignored */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	ulint		ret;
unknown's avatar
unknown committed
5528

unknown's avatar
unknown committed
5529
	ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);
unknown's avatar
unknown committed
5530
	ut_a(prebuilt->trx ==
5531
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
5532

unknown's avatar
unknown committed
5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544
	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);
	}
unknown's avatar
unknown committed
5545

unknown's avatar
foo1  
unknown committed
5546
  	return(HA_ADMIN_CORRUPT);
unknown's avatar
unknown committed
5547 5548
}

5549
/*****************************************************************
unknown's avatar
Merge  
unknown committed
5550 5551 5552
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. */
5553 5554 5555 5556

char*
ha_innobase::update_table_comment(
/*==============================*/
unknown's avatar
Merge  
unknown committed
5557 5558 5559
				/* out: table comment + InnoDB free space +
				info on foreign keys */
        const char*	comment)/* in: table comment defined by user */
5560
{
unknown's avatar
unknown committed
5561
	uint	length			= (uint) strlen(comment);
5562 5563
	char*				str;
	row_prebuilt_t*	prebuilt	= (row_prebuilt_t*)innobase_prebuilt;
5564
	long	flen;
5565

unknown's avatar
unknown committed
5566 5567 5568 5569
	/* 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. */

unknown's avatar
unknown committed
5570
	if (length > 64000 - 3) {
5571 5572 5573
		return((char*)comment); /* string too long */
	}

unknown's avatar
unknown committed
5574 5575
	update_thd(current_thd);

unknown's avatar
unknown committed
5576 5577
	prebuilt->trx->op_info = (char*)"returning table comment";

unknown's avatar
unknown committed
5578 5579 5580 5581
	/* 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);
5582
	str = NULL;
unknown's avatar
unknown committed
5583

5584
	/* output the data to a temporary file */
unknown's avatar
Merge  
unknown committed
5585

5586 5587 5588 5589
	mutex_enter_noninline(&srv_dict_tmpfile_mutex);
	rewind(srv_dict_tmpfile);

	fprintf(srv_dict_tmpfile, "InnoDB free: %lu kB",
unknown's avatar
unknown committed
5590 5591
      		   (ulong) fsp_get_available_space_in_free_extents(
      					prebuilt->table->space));
5592

5593
	dict_print_info_on_foreign_keys(FALSE, srv_dict_tmpfile,
5594
				prebuilt->trx, prebuilt->table);
5595 5596 5597 5598 5599 5600
	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	} else if (length + flen + 3 > 64000) {
		flen = 64000 - 3 - length;
	}
5601

5602 5603
	/* allocate buffer for the full string, and
	read the contents of the temporary file */
5604

5605
	str = my_malloc(length + flen + 3, MYF(0));
5606

5607 5608 5609 5610 5611 5612
	if (str) {
		char* pos	= str + length;
		if (length) {
			memcpy(str, comment, length);
			*pos++ = ';';
			*pos++ = ' ';
5613
		}
5614 5615 5616
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(pos, 1, flen, srv_dict_tmpfile);
		pos[flen] = 0;
unknown's avatar
unknown committed
5617
	}
unknown's avatar
unknown committed
5618

5619 5620
	mutex_exit_noninline(&srv_dict_tmpfile_mutex);

unknown's avatar
unknown committed
5621 5622
        prebuilt->trx->op_info = (char*)"";

5623
  	return(str ? str : (char*) comment);
5624 5625
}

unknown's avatar
unknown committed
5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636
/***********************************************************************
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 */
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
5637
	char*	str	= 0;
5638
	long	flen;
unknown's avatar
unknown committed
5639

unknown's avatar
unknown committed
5640
	ut_a(prebuilt != NULL);
5641

unknown's avatar
unknown committed
5642 5643 5644 5645 5646 5647
	/* 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(current_thd);

5648
	prebuilt->trx->op_info = (char*)"getting info on foreign keys";
unknown's avatar
unknown committed
5649

5650 5651 5652
	/* In case MySQL calls this in the middle of a SELECT query,
	release possible adaptive hash latch to avoid
	deadlocks of threads */
unknown's avatar
unknown committed
5653

5654
	trx_search_latch_release_if_reserved(prebuilt->trx);
5655

5656 5657
	mutex_enter_noninline(&srv_dict_tmpfile_mutex);
	rewind(srv_dict_tmpfile);
unknown's avatar
unknown committed
5658

5659 5660
	/* output the data to a temporary file */
	dict_print_info_on_foreign_keys(TRUE, srv_dict_tmpfile,
5661
				prebuilt->trx, prebuilt->table);
5662
	prebuilt->trx->op_info = (char*)"";
5663

5664 5665 5666 5667 5668 5669
	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	} else if (flen > 64000 - 1) {
		flen = 64000 - 1;
	}
5670

5671 5672
	/* allocate buffer for the string, and
	read the contents of the temporary file */
5673

5674
	str = my_malloc(flen + 1, MYF(0));
5675

5676 5677 5678 5679
	if (str) {
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(str, 1, flen, srv_dict_tmpfile);
		str[flen] = 0;
5680
	}
unknown's avatar
unknown committed
5681

5682 5683
	mutex_exit_noninline(&srv_dict_tmpfile_mutex);

unknown's avatar
Merge  
unknown committed
5684
  	return(str);
unknown's avatar
unknown committed
5685
}
unknown's avatar
unknown committed
5686

5687

unknown's avatar
foo1  
unknown committed
5688
int
5689 5690 5691 5692 5693 5694 5695 5696 5697 5698
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");
  row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
  ut_a(prebuilt != NULL);
  update_thd(current_thd);
  prebuilt->trx->op_info = (char*)"getting list of foreign keys";
  trx_search_latch_release_if_reserved(prebuilt->trx);
5699
  mutex_enter_noninline(&(dict_sys->mutex));
5700 5701
  foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list);

unknown's avatar
foo1  
unknown committed
5702
  while (foreign != NULL)
5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713
  {
    uint i;
    FOREIGN_KEY_INFO f_key_info;
    LEX_STRING *name= 0;
    const char *tmp_buff;

    tmp_buff= foreign->id;
    i= 0;
    while (tmp_buff[i] != '/')
      i++;
    tmp_buff+= i + 1;
unknown's avatar
unknown committed
5714 5715
    f_key_info.forein_id= make_lex_string(thd, 0, tmp_buff,
                                          (uint) strlen(tmp_buff), 1);
5716 5717 5718 5719
    tmp_buff= foreign->referenced_table_name;
    i= 0;
    while (tmp_buff[i] != '/')
      i++;
5720
    f_key_info.referenced_db= make_lex_string(thd, 0,
5721 5722
                                              tmp_buff, i, 1);
    tmp_buff+= i + 1;
unknown's avatar
foo1  
unknown committed
5723
    f_key_info.referenced_table= make_lex_string(thd, 0, tmp_buff,
unknown's avatar
unknown committed
5724
                                               (uint) strlen(tmp_buff), 1);
5725 5726 5727 5728

    for (i= 0;;)
    {
      tmp_buff= foreign->foreign_col_names[i];
unknown's avatar
unknown committed
5729
      name= make_lex_string(thd, name, tmp_buff, (uint) strlen(tmp_buff), 1);
5730 5731
      f_key_info.foreign_fields.push_back(name);
      tmp_buff= foreign->referenced_col_names[i];
unknown's avatar
unknown committed
5732
      name= make_lex_string(thd, name, tmp_buff, (uint) strlen(tmp_buff), 1);
5733 5734 5735 5736 5737 5738 5739 5740 5741 5742
      f_key_info.referenced_fields.push_back(name);
      if (++i >= foreign->n_fields)
        break;
    }

    ulong length= 0;
    if (foreign->type == DICT_FOREIGN_ON_DELETE_CASCADE)
    {
      length=17;
      tmp_buff= "ON DELETE CASCADE";
unknown's avatar
foo1  
unknown committed
5743
    }
5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772
    else if (foreign->type == DICT_FOREIGN_ON_DELETE_SET_NULL)
    {
      length=18;
      tmp_buff= "ON DELETE SET NULL";
    }
    else if (foreign->type == DICT_FOREIGN_ON_DELETE_NO_ACTION)
    {
      length=19;
      tmp_buff= "ON DELETE NO ACTION";
    }
    else if (foreign->type == DICT_FOREIGN_ON_UPDATE_CASCADE)
    {
      length=17;
      tmp_buff= "ON UPDATE CASCADE";
    }
    else if (foreign->type == DICT_FOREIGN_ON_UPDATE_SET_NULL)
    {
      length=18;
      tmp_buff= "ON UPDATE SET NULL";
    }
    else if (foreign->type == DICT_FOREIGN_ON_UPDATE_NO_ACTION)
    {
      length=19;
      tmp_buff= "ON UPDATE NO ACTION";
    }
    f_key_info.constraint_method= make_lex_string(thd,
                                                  f_key_info.constraint_method,
                                                  tmp_buff, length, 1);

unknown's avatar
foo1  
unknown committed
5773
    FOREIGN_KEY_INFO *pf_key_info= ((FOREIGN_KEY_INFO *)
5774 5775 5776 5777 5778
                                    thd->memdup((gptr) &f_key_info,
                                                sizeof(FOREIGN_KEY_INFO)));
    f_key_list->push_back(pf_key_info);
    foreign = UT_LIST_GET_NEXT(foreign_list, foreign);
  }
5779
  mutex_exit_noninline(&(dict_sys->mutex));
5780 5781 5782 5783
  prebuilt->trx->op_info = (char*)"";
  DBUG_RETURN(0);
}

5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809
/*********************************************************************
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)
/*=================================*/
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	bool	can_switch;

 	DBUG_ENTER("ha_innobase::can_switch_engines");
	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);
}

unknown's avatar
unknown committed
5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826 5827 5828 5829
/***********************************************************************
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 */
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;

	if (dict_table_referenced_by_foreign_key(prebuilt->table)) {

		return(1);
	}

	return(0);
}
unknown's avatar
unknown committed
5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840

/***********************************************************************
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(
/*======================================*/
	char*	str)	/* in, own: create info string to free  */
{
	if (str) {
5841
		my_free(str, MYF(0));
unknown's avatar
unknown committed
5842
	}
5843 5844
}

unknown's avatar
unknown committed
5845 5846 5847 5848 5849 5850 5851 5852
/***********************************************************************
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)
unknown's avatar
unknown committed
5853 5854
                           /* in: HA_EXTRA_RETRIEVE_ALL_COLS or some
			   other flag */
unknown's avatar
unknown committed
5855 5856 5857 5858 5859 5860 5861 5862
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;

	/* 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) {
unknown's avatar
unknown committed
5863 5864 5865 5866 5867 5868 5869 5870 5871
                case HA_EXTRA_FLUSH:
                        if (prebuilt->blob_heap) {
                                row_mysql_prebuilt_free_blob_heap(prebuilt);
                        }
                        break;
                case HA_EXTRA_RESET:
                        if (prebuilt->blob_heap) {
                                row_mysql_prebuilt_free_blob_heap(prebuilt);
                        }
5872
                        prebuilt->keep_other_fields_on_keyread = 0;
unknown's avatar
unknown committed
5873 5874 5875
                        prebuilt->read_just_key = 0;
                        break;
  		case HA_EXTRA_RESET_STATE:
5876
	        	prebuilt->keep_other_fields_on_keyread = 0;
unknown's avatar
unknown committed
5877
	        	prebuilt->read_just_key = 0;
unknown's avatar
unknown committed
5878
    	        	break;
unknown's avatar
unknown committed
5879 5880 5881
		case HA_EXTRA_NO_KEYREAD:
    			prebuilt->read_just_key = 0;
    			break;
unknown's avatar
unknown committed
5882
	        case HA_EXTRA_RETRIEVE_ALL_COLS:
unknown's avatar
unknown committed
5883 5884 5885 5886 5887 5888 5889 5890
			prebuilt->hint_need_to_fetch_extra_cols
					= ROW_RETRIEVE_ALL_COLS;
			break;
	        case HA_EXTRA_RETRIEVE_PRIMARY_KEY:
			if (prebuilt->hint_need_to_fetch_extra_cols == 0) {
				prebuilt->hint_need_to_fetch_extra_cols
					= ROW_RETRIEVE_PRIMARY_KEY;
			}
unknown's avatar
unknown committed
5891 5892 5893 5894
			break;
	        case HA_EXTRA_KEYREAD:
	        	prebuilt->read_just_key = 1;
	        	break;
5895 5896 5897
		case HA_EXTRA_KEYREAD_PRESERVE_FIELDS:
			prebuilt->keep_other_fields_on_keyread = 1;
			break;
unknown's avatar
unknown committed
5898 5899 5900 5901 5902 5903 5904
		default:/* Do nothing */
			;
	}

	return(0);
}

unknown's avatar
unknown committed
5905
/**********************************************************************
unknown's avatar
unknown committed
5906 5907 5908 5909
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
unknown's avatar
unknown committed
5910 5911 5912 5913 5914 5915
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
locks (thd->in_lock_tables is true in ::store_lock()) before executing the
procedure. */
unknown's avatar
unknown committed
5916 5917

int
unknown's avatar
unknown committed
5918 5919
ha_innobase::start_stmt(
/*====================*/
unknown's avatar
unknown committed
5920
	              /* out: 0 or error code */
unknown's avatar
unknown committed
5921 5922
	THD*    thd,  /* in: handle to the user thread */
        thr_lock_type lock_type)
unknown's avatar
unknown committed
5923 5924 5925 5926 5927 5928 5929 5930
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	trx_t*		trx;

	update_thd(thd);

	trx = prebuilt->trx;

unknown's avatar
unknown committed
5931 5932 5933 5934 5935 5936 5937
	/* 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. */

unknown's avatar
unknown committed
5938 5939 5940
	innobase_release_stat_resources(trx);

	prebuilt->sql_stat_start = TRUE;
unknown's avatar
unknown committed
5941
	prebuilt->hint_need_to_fetch_extra_cols = 0;
unknown's avatar
unknown committed
5942
	prebuilt->read_just_key = 0;
5943
        prebuilt->keep_other_fields_on_keyread = FALSE;
unknown's avatar
unknown committed
5944

5945
	if (!prebuilt->mysql_has_locked) {
unknown's avatar
unknown committed
5946 5947 5948 5949
	        /* 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 */
unknown's avatar
foo1  
unknown committed
5950

unknown's avatar
unknown committed
5951
	        prebuilt->select_lock_type = LOCK_X;
unknown's avatar
unknown committed
5952 5953 5954
	} else {
		if (trx->isolation_level != TRX_ISO_SERIALIZABLE
		    && thd->lex->sql_command == SQLCOM_SELECT
unknown's avatar
unknown committed
5955
		    && lock_type == TL_READ) {
unknown's avatar
foo1  
unknown committed
5956

unknown's avatar
unknown committed
5957 5958 5959 5960 5961 5962 5963 5964 5965
			/* 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(),
unknown's avatar
foo1  
unknown committed
5966 5967
			2) ::external_lock(),
			3) ::init_table_handle_for_HANDLER(), and
5968
			4) :.transactional_table_lock(). */
unknown's avatar
unknown committed
5969 5970 5971 5972 5973 5974

			prebuilt->select_lock_type =
				prebuilt->stored_select_lock_type;
		}
	}

5975 5976
	trx->detailed_error[0] = '\0';

unknown's avatar
unknown committed
5977
	/* Set the MySQL flag to mark that there is an active transaction */
5978 5979
        if (trx->active_trans == 0) {

unknown's avatar
unknown committed
5980
                innobase_register_trx_and_stmt(thd);
5981
                trx->active_trans = 1;
unknown's avatar
unknown committed
5982 5983 5984
        } else {
		innobase_register_stmt(thd);
	}
unknown's avatar
unknown committed
5985 5986

	return(0);
unknown's avatar
unknown committed
5987 5988
}

unknown's avatar
unknown committed
5989 5990 5991 5992 5993 5994 5995 5996 5997 5998 5999
/**********************************************************************
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);
unknown's avatar
unknown committed
6000
		case ISO_READ_COMMITTED: return(TRX_ISO_READ_COMMITTED);
unknown's avatar
unknown committed
6001 6002 6003
		case ISO_SERIALIZABLE: return(TRX_ISO_SERIALIZABLE);
		case ISO_READ_UNCOMMITTED: return(TRX_ISO_READ_UNCOMMITTED);
		default: ut_a(0); return(0);
unknown's avatar
foo1  
unknown committed
6004
	}
unknown's avatar
unknown committed
6005
}
unknown's avatar
foo1  
unknown committed
6006

unknown's avatar
unknown committed
6007 6008
/**********************************************************************
As MySQL will execute an external lock for every new table it uses when it
unknown's avatar
unknown committed
6009 6010 6011
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
unknown's avatar
unknown committed
6012 6013 6014 6015 6016 6017 6018
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(
/*=======================*/
6019
			        /* out: 0 */
unknown's avatar
unknown committed
6020 6021 6022 6023 6024 6025 6026
	THD*	thd,		/* in: handle to the user thread */
	int 	lock_type)	/* in: lock type */
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	trx_t*		trx;

  	DBUG_ENTER("ha_innobase::external_lock");
unknown's avatar
unknown committed
6027
	DBUG_PRINT("enter",("lock_type: %d", lock_type));
unknown's avatar
unknown committed
6028 6029 6030 6031 6032 6033

	update_thd(thd);

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
unknown's avatar
unknown committed
6034
	prebuilt->hint_need_to_fetch_extra_cols = 0;
unknown's avatar
unknown committed
6035 6036

	prebuilt->read_just_key = 0;
6037
	prebuilt->keep_other_fields_on_keyread = FALSE;
unknown's avatar
unknown committed
6038 6039 6040 6041 6042 6043

	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;
unknown's avatar
unknown committed
6044
		prebuilt->stored_select_lock_type = LOCK_X;
unknown's avatar
unknown committed
6045 6046 6047
	}

	if (lock_type != F_UNLCK) {
unknown's avatar
unknown committed
6048
		/* MySQL is setting a new table lock */
unknown's avatar
unknown committed
6049

6050
		trx->detailed_error[0] = '\0';
unknown's avatar
foo1  
unknown committed
6051

unknown's avatar
unknown committed
6052 6053
		/* Set the MySQL flag to mark that there is an active
		transaction */
6054 6055
                if (trx->active_trans == 0) {

unknown's avatar
unknown committed
6056
                        innobase_register_trx_and_stmt(thd);
6057
                        trx->active_trans = 1;
unknown's avatar
unknown committed
6058 6059 6060
                } else if (trx->n_mysql_tables_in_use == 0) {
			innobase_register_stmt(thd);
		}
unknown's avatar
unknown committed
6061

unknown's avatar
unknown committed
6062
		trx->n_mysql_tables_in_use++;
6063
		prebuilt->mysql_has_locked = TRUE;
unknown's avatar
unknown committed
6064

unknown's avatar
unknown committed
6065 6066
		if (trx->n_mysql_tables_in_use == 1) {
		        trx->isolation_level = innobase_map_isolation_level(
unknown's avatar
unknown committed
6067 6068
						(enum_tx_isolation)
						thd->variables.tx_isolation);
unknown's avatar
unknown committed
6069 6070 6071 6072 6073 6074 6075 6076 6077

	                      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);
                        }
unknown's avatar
unknown committed
6078
		}
unknown's avatar
unknown committed
6079 6080

		if (trx->isolation_level == TRX_ISO_SERIALIZABLE
unknown's avatar
unknown committed
6081 6082
		    && prebuilt->select_lock_type == LOCK_NONE
		    && (thd->options
unknown's avatar
unknown committed
6083
				& (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
unknown's avatar
unknown committed
6084

unknown's avatar
unknown committed
6085 6086
			/* To get serializable execution, we let InnoDB
			conceptually add 'LOCK IN SHARE MODE' to all SELECTs
unknown's avatar
unknown committed
6087 6088 6089 6090 6091
			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. */
unknown's avatar
unknown committed
6092 6093

			prebuilt->select_lock_type = LOCK_S;
unknown's avatar
unknown committed
6094
			prebuilt->stored_select_lock_type = LOCK_S;
unknown's avatar
unknown committed
6095 6096
		}

unknown's avatar
unknown committed
6097 6098 6099 6100
		/* 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
unknown's avatar
foo1  
unknown committed
6101
		VERY easily deadlocks.
6102 6103 6104 6105 6106

		We do not set InnoDB table locks if user has not explicitly
		requested a table lock. Note that thd->in_lock_tables
		can  be TRUE on some cases e.g. at the start of a stored
		procedure call (SQLCOM_CALL). */
unknown's avatar
unknown committed
6107

unknown's avatar
unknown committed
6108
		if (prebuilt->select_lock_type != LOCK_NONE) {
unknown's avatar
unknown committed
6109

6110
			if (thd->in_lock_tables &&
6111
			    thd->lex->sql_command == SQLCOM_LOCK_TABLES &&
unknown's avatar
unknown committed
6112 6113
			    thd->variables.innodb_table_locks &&
			    (thd->options & OPTION_NOT_AUTOCOMMIT)) {
unknown's avatar
unknown committed
6114

6115
				ulint	error;
6116
				error = row_lock_table_for_mysql(prebuilt,
6117
							NULL, 0);
6118 6119 6120

				if (error != DB_SUCCESS) {
					error = convert_error_code_to_mysql(
unknown's avatar
unknown committed
6121 6122
						(int) error, user_thd);
					DBUG_RETURN((int) error);
6123 6124
				}
			}
unknown's avatar
unknown committed
6125 6126 6127 6128

		  	trx->mysql_n_tables_locked++;
		}

6129
		DBUG_RETURN(0);
unknown's avatar
unknown committed
6130
	}
unknown's avatar
unknown committed
6131

unknown's avatar
unknown committed
6132
	/* MySQL is releasing a table lock */
unknown's avatar
unknown committed
6133

unknown's avatar
unknown committed
6134 6135
	trx->n_mysql_tables_in_use--;
	prebuilt->mysql_has_locked = FALSE;
unknown's avatar
unknown committed
6136

unknown's avatar
unknown committed
6137 6138
	/* If the MySQL lock count drops to zero we know that the current SQL
	statement has ended */
unknown's avatar
unknown committed
6139

unknown's avatar
unknown committed
6140
	if (trx->n_mysql_tables_in_use == 0) {
unknown's avatar
unknown committed
6141

unknown's avatar
unknown committed
6142 6143
	        trx->mysql_n_tables_locked = 0;
		prebuilt->used_in_HANDLER = FALSE;
unknown's avatar
foo1  
unknown committed
6144

unknown's avatar
unknown committed
6145 6146 6147 6148
		/* 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. */

unknown's avatar
unknown committed
6149
		innobase_release_stat_resources(trx);
unknown's avatar
unknown committed
6150

unknown's avatar
unknown committed
6151
		if (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
6152 6153
                        if (trx->active_trans != 0) {
                                innobase_commit(thd, TRUE);
unknown's avatar
unknown committed
6154 6155
			}
		} else {
unknown's avatar
unknown committed
6156
			if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
6157
	    					&& trx->global_read_view) {
unknown's avatar
unknown committed
6158

unknown's avatar
unknown committed
6159
				/* At low transaction isolation levels we let
unknown's avatar
unknown committed
6160 6161
				each consistent read set its own snapshot */

unknown's avatar
unknown committed
6162
				read_view_close_for_mysql(trx);
unknown's avatar
unknown committed
6163
			}
unknown's avatar
unknown committed
6164 6165 6166
		}
	}

6167
	DBUG_RETURN(0);
unknown's avatar
unknown committed
6168 6169
}

6170 6171 6172 6173 6174 6175 6176
/**********************************************************************
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(
/*==================================*/
6177
			        /* out: error code */
6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197 6198
	THD*	thd,		/* in: handle to the user thread */
	int 	lock_type)	/* in: lock type */
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	trx_t*		trx;

  	DBUG_ENTER("ha_innobase::transactional_table_lock");
	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);

 	if (prebuilt->table->ibd_file_missing && !current_thd->tablespace_op) {
	        ut_print_timestamp(stderr);
	        fprintf(stderr, "  InnoDB error:\n"
"MySQL is trying to use a table handle but the .ibd file for\n"
"table %s does not exist.\n"
"Have you deleted the .ibd file from the database directory under\n"
unknown's avatar
unknown committed
6199
"the MySQL datadir?"
unknown's avatar
unknown committed
6200
"See http://dev.mysql.com/doc/refman/5.0/en/innodb-troubleshooting.html\n"
6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217
"how you can resolve the problem.\n",
				prebuilt->table->name);
		DBUG_RETURN(HA_ERR_CRASHED);
	}

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

	prebuilt->read_just_key = 0;
	prebuilt->keep_other_fields_on_keyread = FALSE;

	if (lock_type == F_WRLCK) {
		prebuilt->select_lock_type = LOCK_X;
		prebuilt->stored_select_lock_type = LOCK_X;
	} else if (lock_type == F_RDLCK) {
unknown's avatar
unknown committed
6218 6219
		prebuilt->select_lock_type = LOCK_S;
		prebuilt->stored_select_lock_type = LOCK_S;
6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231
	} else {
	        ut_print_timestamp(stderr);
	        fprintf(stderr, "  InnoDB error:\n"
"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 */
unknown's avatar
unknown committed
6232 6233
        if (trx->active_trans == 0) {

unknown's avatar
unknown committed
6234
                innobase_register_trx_and_stmt(thd);
unknown's avatar
unknown committed
6235 6236
                trx->active_trans = 1;
        }
6237 6238 6239 6240

	if (thd->in_lock_tables && thd->variables.innodb_table_locks) {
		ulint	error = DB_SUCCESS;

6241
		error = row_lock_table_for_mysql(prebuilt, NULL, 0);
6242 6243

		if (error != DB_SUCCESS) {
unknown's avatar
unknown committed
6244 6245
			error = convert_error_code_to_mysql((int) error, user_thd);
			DBUG_RETURN((int) error);
6246 6247 6248 6249
		}

		if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {

unknown's avatar
foo1  
unknown committed
6250 6251
			/* Store the current undo_no of the transaction
			so that we know where to roll back if we have
6252 6253 6254 6255 6256 6257 6258 6259 6260
			to roll back the next SQL statement */

			trx_mark_sql_stat_end(trx);
		}
	}

	DBUG_RETURN(0);
}

6261 6262 6263 6264 6265 6266 6267 6268 6269 6270
/****************************************************************************
Here we export InnoDB status variables to MySQL.  */

void
innodb_export_status(void)
/*======================*/
{
  srv_export_innodb_status();
}

unknown's avatar
unknown committed
6271
/****************************************************************************
unknown's avatar
unknown committed
6272
Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
unknown's avatar
unknown committed
6273 6274
Monitor to the client. */

unknown's avatar
unknown committed
6275
bool
unknown's avatar
unknown committed
6276 6277 6278 6279
innodb_show_status(
/*===============*/
	THD*	thd)	/* in: the MySQL query thread of the caller */
{
6280 6281 6282 6283 6284 6285
	Protocol*		protocol = thd->protocol;
	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;
unknown's avatar
unknown committed
6286

unknown's avatar
unknown committed
6287 6288
        DBUG_ENTER("innodb_show_status");

6289
        if (have_innodb != SHOW_OPTION_YES) {
unknown's avatar
unknown committed
6290 6291 6292
                my_message(ER_NOT_SUPPORTED_YET,
          "Cannot call SHOW INNODB STATUS because skip-innodb is defined",
                           MYF(0));
unknown's avatar
unknown committed
6293
                DBUG_RETURN(TRUE);
unknown's avatar
unknown committed
6294
        }
unknown's avatar
unknown committed
6295

unknown's avatar
unknown committed
6296 6297 6298 6299
	trx = check_trx_exists(thd);

	innobase_release_stat_resources(trx);

6300 6301
	/* We let the InnoDB Monitor to output at most MAX_STATUS_SIZE
	bytes of text. */
6302

6303
	long	flen, usable_len;
6304
	char*	str;
6305

6306
	mutex_enter_noninline(&srv_monitor_file_mutex);
6307
	rewind(srv_monitor_file);
6308 6309
	srv_printf_innodb_monitor(srv_monitor_file,
				&trx_list_start, &trx_list_end);
6310
	flen = ftell(srv_monitor_file);
6311
	os_file_set_eof(srv_monitor_file);
unknown's avatar
unknown committed
6312

6313 6314
	if (flen < 0) {
		flen = 0;
6315 6316 6317 6318 6319 6320
	}

	if (flen > MAX_STATUS_SIZE) {
		usable_len = MAX_STATUS_SIZE;
	} else {
		usable_len = flen;
6321
	}
unknown's avatar
unknown committed
6322

6323 6324
	/* allocate buffer for the string, and
	read the contents of the temporary file */
unknown's avatar
unknown committed
6325

6326
	if (!(str = my_malloc(usable_len + 1, MYF(0))))
unknown's avatar
unknown committed
6327
        {
unknown's avatar
unknown committed
6328
          mutex_exit_noninline(&srv_monitor_file_mutex);
unknown's avatar
Merge  
unknown committed
6329
          DBUG_RETURN(TRUE);
unknown's avatar
unknown committed
6330
        }
unknown's avatar
unknown committed
6331

unknown's avatar
unknown committed
6332
	rewind(srv_monitor_file);
6333 6334
	if (flen < MAX_STATUS_SIZE) {
		/* Display the entire output. */
unknown's avatar
unknown committed
6335
		flen = (long) fread(str, 1, flen, srv_monitor_file);
6336 6337 6338 6339 6340
	} 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. */
unknown's avatar
unknown committed
6341
		long len = (long) fread(str, 1, trx_list_start, srv_monitor_file);
6342 6343 6344 6345
		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);
unknown's avatar
unknown committed
6346
		len += (long) fread(str + len, 1, usable_len, srv_monitor_file);
6347 6348 6349
		flen = len;
	} else {
		/* Omit the end of the output. */
unknown's avatar
unknown committed
6350
		flen = (long) fread(str, 1, MAX_STATUS_SIZE - 1, srv_monitor_file);
6351
	}
unknown's avatar
unknown committed
6352

6353
	mutex_exit_noninline(&srv_monitor_file_mutex);
6354

unknown's avatar
unknown committed
6355 6356
	List<Item> field_list;

6357
	field_list.push_back(new Item_empty_string("Status", flen));
unknown's avatar
unknown committed
6358

6359 6360
	if (protocol->send_fields(&field_list, Protocol::SEND_NUM_ROWS |
                                               Protocol::SEND_EOF)) {
6361
		my_free(str, MYF(0));
unknown's avatar
unknown committed
6362

unknown's avatar
unknown committed
6363
		DBUG_RETURN(TRUE);
unknown's avatar
unknown committed
6364 6365
	}

unknown's avatar
unknown committed
6366 6367 6368
        protocol->prepare_for_resend();
        protocol->store(str, flen, system_charset_info);
        my_free(str, MYF(0));
unknown's avatar
unknown committed
6369

unknown's avatar
unknown committed
6370
        if (protocol->write()) {
unknown's avatar
unknown committed
6371

unknown's avatar
unknown committed
6372 6373
        	DBUG_RETURN(TRUE);
	}
unknown's avatar
unknown committed
6374
	send_eof(thd);
unknown's avatar
unknown committed
6375

unknown's avatar
unknown committed
6376
  	DBUG_RETURN(FALSE);
unknown's avatar
unknown committed
6377 6378
}

unknown's avatar
unknown committed
6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389
/****************************************************************************
Implements the SHOW MUTEX STATUS command. . */

bool
innodb_mutex_show_status(
/*===============*/
  THD*  thd)  /* in: the MySQL query thread of the caller */
{
  Protocol        *protocol= thd->protocol;
  List<Item> field_list;
  mutex_t*  mutex;
6390
#ifdef UNIV_DEBUG
unknown's avatar
unknown committed
6391 6392 6393 6394 6395 6396
  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;
6397
#endif /* UNIV_DEBUG */
unknown's avatar
unknown committed
6398 6399
  DBUG_ENTER("innodb_mutex_show_status");

6400
#ifdef UNIV_DEBUG
unknown's avatar
unknown committed
6401 6402
  field_list.push_back(new Item_empty_string("Mutex", FN_REFLEN));
  field_list.push_back(new Item_empty_string("Module", FN_REFLEN));
6403 6404 6405 6406 6407 6408
  field_list.push_back(new Item_uint("Count", MY_INT64_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_uint("Spin_waits", MY_INT64_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_uint("Spin_rounds", MY_INT64_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_uint("OS_waits", MY_INT64_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_uint("OS_yields", MY_INT64_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_uint("OS_waits_time", MY_INT64_NUM_DECIMAL_DIGITS));
6409 6410
#else /* UNIV_DEBUG */
  field_list.push_back(new Item_empty_string("File", FN_REFLEN));
6411 6412
  field_list.push_back(new Item_uint("Line", MY_INT64_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_uint("OS_waits", MY_INT64_NUM_DECIMAL_DIGITS));
6413
#endif /* UNIV_DEBUG */
unknown's avatar
unknown committed
6414 6415 6416 6417 6418

  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_RETURN(TRUE);

6419
  mutex_enter_noninline(&mutex_list_mutex);
unknown's avatar
unknown committed
6420 6421 6422 6423 6424

  mutex = UT_LIST_GET_FIRST(mutex_list);

  while ( mutex != NULL )
  {
6425
#ifdef UNIV_DEBUG
unknown's avatar
unknown committed
6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441
    if (mutex->mutex_type != 1)
    {
      if (mutex->count_using > 0)
      {
        protocol->prepare_for_resend();
        protocol->store(mutex->cmutex_name, system_charset_info);
        protocol->store(mutex->cfile_name, system_charset_info);
        protocol->store((ulonglong)mutex->count_using);
        protocol->store((ulonglong)mutex->count_spin_loop);
        protocol->store((ulonglong)mutex->count_spin_rounds);
        protocol->store((ulonglong)mutex->count_os_wait);
        protocol->store((ulonglong)mutex->count_os_yield);
        protocol->store((ulonglong)mutex->lspent_time/1000);

        if (protocol->write())
        {
6442
          mutex_exit_noninline(&mutex_list_mutex);
unknown's avatar
unknown committed
6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455
          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;
    }
6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467
#else /* UNIV_DEBUG */
    protocol->prepare_for_resend();
    protocol->store(mutex->cfile_name, system_charset_info);
    protocol->store((ulonglong)mutex->cline);
    protocol->store((ulonglong)mutex->count_os_wait);

    if (protocol->write())
    {
      mutex_exit_noninline(&mutex_list_mutex);
      DBUG_RETURN(1);
    }
#endif /* UNIV_DEBUG */
unknown's avatar
unknown committed
6468 6469 6470 6471

    mutex = UT_LIST_GET_NEXT(list, mutex);
  }

6472 6473 6474
  mutex_exit_noninline(&mutex_list_mutex);

#ifdef UNIV_DEBUG
unknown's avatar
unknown committed
6475 6476 6477 6478 6479 6480 6481 6482 6483 6484 6485 6486 6487 6488
  protocol->prepare_for_resend();
  protocol->store("rw_lock_mutexes", system_charset_info);
  protocol->store("", system_charset_info);
  protocol->store((ulonglong)rw_lock_count);
  protocol->store((ulonglong)rw_lock_count_spin_loop);
  protocol->store((ulonglong)rw_lock_count_spin_rounds);
  protocol->store((ulonglong)rw_lock_count_os_wait);
  protocol->store((ulonglong)rw_lock_count_os_yield);
  protocol->store((ulonglong)rw_lock_wait_time/1000);

  if (protocol->write())
  {
    DBUG_RETURN(1);
  }
6489
#endif /* UNIV_DEBUG */
unknown's avatar
unknown committed
6490 6491 6492 6493 6494

  send_eof(thd);
  DBUG_RETURN(FALSE);
}

6495 6496 6497 6498 6499
/****************************************************************************
 Handling the shared INNOBASE_SHARE structure that is needed to provide table
 locking.
****************************************************************************/

6500
static mysql_byte* innobase_get_key(INNOBASE_SHARE *share,uint *length,
6501 6502 6503
			      my_bool not_used __attribute__((unused)))
{
  *length=share->table_name_length;
6504
  return (mysql_byte*) share->table_name;
6505 6506 6507 6508
}

static INNOBASE_SHARE *get_share(const char *table_name)
{
unknown's avatar
unknown committed
6509 6510 6511
	INNOBASE_SHARE *share;
	pthread_mutex_lock(&innobase_share_mutex);
	uint length=(uint) strlen(table_name);
unknown's avatar
foo1  
unknown committed
6512

unknown's avatar
unknown committed
6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527
	if (!(share=(INNOBASE_SHARE*) hash_search(&innobase_open_tables,
				(mysql_byte*) table_name,
				length))) {

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

		share->table_name_length=length;
		share->table_name=(char*) (share+1);
		strmov(share->table_name,table_name);

		if (my_hash_insert(&innobase_open_tables,
				(mysql_byte*) share)) {
			pthread_mutex_unlock(&innobase_share_mutex);
			my_free((gptr) share,0);
unknown's avatar
foo1  
unknown committed
6528

unknown's avatar
unknown committed
6529 6530
			return 0;
		}
unknown's avatar
foo1  
unknown committed
6531

unknown's avatar
unknown committed
6532 6533 6534
		thr_lock_init(&share->lock);
		pthread_mutex_init(&share->mutex,MY_MUTEX_INIT_FAST);
	}
unknown's avatar
foo1  
unknown committed
6535

unknown's avatar
unknown committed
6536 6537
	share->use_count++;
	pthread_mutex_unlock(&innobase_share_mutex);
unknown's avatar
foo1  
unknown committed
6538

unknown's avatar
unknown committed
6539
	return share;
6540 6541 6542 6543
}

static void free_share(INNOBASE_SHARE *share)
{
unknown's avatar
unknown committed
6544
  pthread_mutex_lock(&innobase_share_mutex);
6545 6546
  if (!--share->use_count)
  {
6547
    hash_delete(&innobase_open_tables, (mysql_byte*) share);
6548 6549 6550 6551
    thr_lock_delete(&share->lock);
    pthread_mutex_destroy(&share->mutex);
    my_free((gptr) share, MYF(0));
  }
unknown's avatar
unknown committed
6552
  pthread_mutex_unlock(&innobase_share_mutex);
6553
}
6554 6555

/*********************************************************************
unknown's avatar
unknown committed
6556
Converts a MySQL table lock stored in the 'lock' field of the handle to
unknown's avatar
unknown committed
6557 6558 6559 6560 6561 6562
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. */
6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575

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 */
	enum thr_lock_type 	lock_type)	/* in: lock type to store in
unknown's avatar
unknown committed
6576 6577
						'lock'; this may also be
						TL_IGNORE */
6578 6579 6580
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;

unknown's avatar
unknown committed
6581 6582 6583 6584
	/* NOTE: MySQL  can call this function with lock 'type' TL_IGNORE!
	Be careful to ignore TL_IGNORE if we are going to do something with
	only 'real' locks! */

unknown's avatar
foo1  
unknown committed
6585
	if ((lock_type == TL_READ && thd->in_lock_tables) ||
unknown's avatar
unknown committed
6586 6587
	    (lock_type == TL_READ_HIGH_PRIORITY && thd->in_lock_tables) ||
	    lock_type == TL_READ_WITH_SHARED_LOCKS ||
unknown's avatar
unknown committed
6588
	    lock_type == TL_READ_NO_INSERT ||
unknown's avatar
unknown committed
6589 6590
	    (thd->lex->sql_command != SQLCOM_SELECT
	     && lock_type != TL_IGNORE)) {
unknown's avatar
unknown committed
6591

unknown's avatar
unknown committed
6592
		/* The OR cases above are in this order:
unknown's avatar
unknown committed
6593 6594
		1) MySQL is doing LOCK TABLES ... READ LOCAL, or we
		are processing a stored procedure or function, or
unknown's avatar
unknown committed
6595 6596 6597
		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
unknown's avatar
unknown committed
6598
		INSERT INTO ... SELECT ... and the logical logging (MySQL
unknown's avatar
unknown committed
6599
		binlog) requires the use of a locking read, or
unknown's avatar
unknown committed
6600 6601 6602
		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
unknown's avatar
unknown committed
6603 6604 6605 6606 6607 6608
		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. */
unknown's avatar
unknown committed
6609

6610 6611 6612
		if (srv_locks_unsafe_for_binlog &&
		    prebuilt->trx->isolation_level != TRX_ISO_SERIALIZABLE &&
		    (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT) &&
unknown's avatar
unknown committed
6613
		    (thd->lex->sql_command == SQLCOM_INSERT_SELECT ||
unknown's avatar
unknown committed
6614 6615
		     thd->lex->sql_command == SQLCOM_UPDATE ||
		     thd->lex->sql_command == SQLCOM_CREATE_TABLE)) {
6616 6617 6618 6619

			/* In case we have innobase_locks_unsafe_for_binlog
			option set and isolation level of the transaction
			is not set to serializable and MySQL is doing
unknown's avatar
unknown committed
6620 6621 6622 6623
			INSERT INTO...SELECT or UPDATE ... = (SELECT ...) or
			CREATE  ... SELECT... without FOR UPDATE or
			IN SHARE MODE in select, then we use consistent
			read for select. */
6624 6625 6626

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
6627
		} else if (thd->lex->sql_command == SQLCOM_CHECKSUM) {
6628
			/* Use consistent read for checksum table */
6629 6630 6631

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
6632 6633 6634 6635
		} else {
			prebuilt->select_lock_type = LOCK_S;
			prebuilt->stored_select_lock_type = LOCK_S;
		}
unknown's avatar
unknown committed
6636

unknown's avatar
unknown committed
6637 6638
	} else if (lock_type != TL_IGNORE) {

6639
		/* We set possible LOCK_X value in external_lock, not yet
6640
		here even if this would be SELECT ... FOR UPDATE */
unknown's avatar
unknown committed
6641

6642
		prebuilt->select_lock_type = LOCK_NONE;
unknown's avatar
unknown committed
6643
		prebuilt->stored_select_lock_type = LOCK_NONE;
6644 6645 6646 6647
	}

	if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK) {

6648
		/* Starting from 5.0.7, we weaken also the table locks
unknown's avatar
unknown committed
6649 6650 6651 6652 6653 6654 6655
		set at the start of a MySQL stored procedure call, just like
		we weaken the locks set at the start of an SQL statement.
		MySQL does set thd->in_lock_tables TRUE there, but in reality
		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). */

unknown's avatar
unknown committed
6656 6657
		if (lock_type == TL_READ
		    && thd->lex->sql_command == SQLCOM_LOCK_TABLES) {
unknown's avatar
unknown committed
6658 6659 6660 6661 6662 6663 6664
			/* 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
unknown's avatar
unknown committed
6665 6666 6667
			equivalent to READ. This will change the InnoDB
			behavior in mysqldump, so that dumps of InnoDB tables
			are consistent with dumps of MyISAM tables. */
unknown's avatar
unknown committed
6668 6669 6670 6671

			lock_type = TL_READ_NO_INSERT;
		}

6672
		/* If we are not doing a LOCK TABLE, DISCARD/IMPORT
unknown's avatar
foo1  
unknown committed
6673
		TABLESPACE or TRUNCATE TABLE then allow multiple
6674 6675
		writers. Note that ALTER TABLE uses a TL_WRITE_ALLOW_READ
		< TL_WRITE_CONCURRENT_INSERT.
6676

unknown's avatar
unknown committed
6677 6678 6679 6680
		We especially allow multiple writers if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL) or a
		stored function call (MySQL does have thd->in_lock_tables
		TRUE there). */
6681

unknown's avatar
foo1  
unknown committed
6682
    		if ((lock_type >= TL_WRITE_CONCURRENT_INSERT
6683
		    && lock_type <= TL_WRITE)
unknown's avatar
unknown committed
6684
		    && !(thd->in_lock_tables
unknown's avatar
unknown committed
6685
			    && thd->lex->sql_command == SQLCOM_LOCK_TABLES)
6686
		    && !thd->tablespace_op
unknown's avatar
unknown committed
6687
		    && thd->lex->sql_command != SQLCOM_TRUNCATE
6688
		    && thd->lex->sql_command != SQLCOM_OPTIMIZE
unknown's avatar
unknown committed
6689

unknown's avatar
unknown committed
6690
#ifdef __WIN__
unknown's avatar
unknown committed
6691 6692 6693 6694 6695 6696 6697
                /* For alter table on win32 for succesful operation
                completion it is used TL_WRITE(=10) lock instead of
                TL_WRITE_ALLOW_READ(=6), however here in innodb handler
                TL_WRITE is lifted to TL_WRITE_ALLOW_WRITE, which causes
                race condition when several clients do alter table
                simultaneously (bug #17264). This fix avoids the problem. */
		    && thd->lex->sql_command != SQLCOM_ALTER_TABLE
unknown's avatar
unknown committed
6698
#endif
unknown's avatar
unknown committed
6699

6700
		    && thd->lex->sql_command != SQLCOM_CREATE_TABLE) {
6701

6702
			lock_type = TL_WRITE_ALLOW_WRITE;
6703 6704
      		}

unknown's avatar
unknown committed
6705 6706 6707 6708
		/* 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
unknown's avatar
foo1  
unknown committed
6709
		concurrent inserts to t2.
6710

unknown's avatar
foo1  
unknown committed
6711 6712
		We especially allow concurrent inserts if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL)
6713
		(MySQL does have thd->in_lock_tables TRUE there). */
unknown's avatar
foo1  
unknown committed
6714

unknown's avatar
unknown committed
6715
		if (lock_type == TL_READ_NO_INSERT
unknown's avatar
unknown committed
6716
		    && thd->lex->sql_command != SQLCOM_LOCK_TABLES) {
unknown's avatar
unknown committed
6717

unknown's avatar
unknown committed
6718 6719
			lock_type = TL_READ;
		}
unknown's avatar
foo1  
unknown committed
6720

6721 6722
		lock.type = lock_type;
	}
6723

6724
	*to++= &lock;
6725

6726 6727 6728
	return(to);
}

6729
/***********************************************************************
unknown's avatar
unknown committed
6730 6731
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
unknown's avatar
unknown committed
6732
counter if it already has been initialized. In parameter ret returns
unknown's avatar
unknown committed
6733
the value of the auto-inc counter. */
6734

unknown's avatar
unknown committed
6735 6736 6737
int
ha_innobase::innobase_read_and_init_auto_inc(
/*=========================================*/
unknown's avatar
unknown committed
6738 6739
				/* out: 0 or error code: deadlock or lock wait
				timeout */
unknown's avatar
unknown committed
6740
	longlong*	ret)	/* out: auto-inc value */
6741
{
unknown's avatar
unknown committed
6742
  	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
unknown's avatar
unknown committed
6743
    	longlong        auto_inc;
unknown's avatar
unknown committed
6744 6745
	ulint		old_select_lock_type;
	ibool		trx_was_not_started	= FALSE;
unknown's avatar
unknown committed
6746
  	int     	error;
6747

unknown's avatar
unknown committed
6748
  	ut_a(prebuilt);
unknown's avatar
unknown committed
6749
	ut_a(prebuilt->trx ==
6750
                (trx_t*) current_thd->ha_data[innobase_hton.slot]);
unknown's avatar
unknown committed
6751
	ut_a(prebuilt->table);
unknown's avatar
foo1  
unknown committed
6752

unknown's avatar
unknown committed
6753 6754 6755 6756
	if (prebuilt->trx->conc_state == TRX_NOT_STARTED) {
		trx_was_not_started = TRUE;
	}

unknown's avatar
unknown committed
6757 6758 6759 6760 6761
	/* 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);

unknown's avatar
unknown committed
6762
	auto_inc = dict_table_autoinc_read(prebuilt->table);
unknown's avatar
unknown committed
6763

unknown's avatar
unknown committed
6764 6765 6766
	if (auto_inc != 0) {
		/* Already initialized */
		*ret = auto_inc;
unknown's avatar
foo1  
unknown committed
6767

unknown's avatar
unknown committed
6768 6769 6770
		error = 0;

		goto func_exit_early;
unknown's avatar
unknown committed
6771
	}
6772

unknown's avatar
unknown committed
6773
	error = row_lock_table_autoinc_for_mysql(prebuilt);
unknown's avatar
unknown committed
6774

unknown's avatar
unknown committed
6775 6776
	if (error != DB_SUCCESS) {
		error = convert_error_code_to_mysql(error, user_thd);
6777

unknown's avatar
unknown committed
6778
		goto func_exit_early;
unknown's avatar
foo1  
unknown committed
6779
	}
unknown's avatar
unknown committed
6780

unknown's avatar
unknown committed
6781 6782
	/* Check again if someone has initialized the counter meanwhile */
	auto_inc = dict_table_autoinc_read(prebuilt->table);
unknown's avatar
unknown committed
6783

unknown's avatar
unknown committed
6784 6785
	if (auto_inc != 0) {
		*ret = auto_inc;
unknown's avatar
foo1  
unknown committed
6786

unknown's avatar
unknown committed
6787 6788 6789
		error = 0;

		goto func_exit_early;
unknown's avatar
unknown committed
6790
	}
6791

unknown's avatar
unknown committed
6792
  	(void) extra(HA_EXTRA_KEYREAD);
6793
  	index_init(table->s->next_number_index);
unknown's avatar
unknown committed
6794

unknown's avatar
unknown committed
6795 6796 6797 6798 6799 6800
	/* Starting from 5.0.9, we use a consistent read to read the auto-inc
	column maximum value. This eliminates the spurious deadlocks caused
	by the row X-lock that we previously used. Note the following flaw
	in our algorithm: if some other user meanwhile UPDATEs the auto-inc
	column, our consistent read will not return the largest value. We
	accept this flaw, since the deadlocks were a bigger trouble. */
6801

unknown's avatar
unknown committed
6802
  	/* Fetch all the columns in the key */
unknown's avatar
foo1  
unknown committed
6803

unknown's avatar
unknown committed
6804
	prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
6805

unknown's avatar
unknown committed
6806 6807 6808 6809 6810 6811 6812
	old_select_lock_type = prebuilt->select_lock_type;
  	prebuilt->select_lock_type = LOCK_NONE;

	/* Eliminate an InnoDB error print that happens when we try to SELECT
	from a table when no table has been locked in ::external_lock(). */
	prebuilt->trx->n_mysql_tables_in_use++;

unknown's avatar
unknown committed
6813
	error = index_last(table->record[1]);
6814

unknown's avatar
unknown committed
6815 6816 6817
	prebuilt->trx->n_mysql_tables_in_use--;
  	prebuilt->select_lock_type = old_select_lock_type;

unknown's avatar
unknown committed
6818
  	if (error) {
unknown's avatar
unknown committed
6819 6820 6821 6822 6823 6824
		if (error == HA_ERR_END_OF_FILE) {
			/* The table was empty, initialize to 1 */
			auto_inc = 1;

			error = 0;
		} else {
unknown's avatar
unknown committed
6825
			/* This should not happen in a consistent read */
6826 6827
		  sql_print_error("Consistent read of auto-inc column "
				  "returned %lu", (ulong) error);
unknown's avatar
unknown committed
6828 6829 6830 6831
  			auto_inc = -1;

  			goto func_exit;
  		}
unknown's avatar
unknown committed
6832
  	} else {
unknown's avatar
unknown committed
6833 6834 6835 6836 6837 6838 6839
		/* Initialize to max(col) + 1; we use
		'found_next_number_field' below because MySQL in SHOW TABLE
		STATUS does not seem to set 'next_number_field'. The comment
		in table.h says that 'next_number_field' is set when it is
		'active'. */

    		auto_inc = (longlong) table->found_next_number_field->
6840
                        	val_int_offset(table->s->rec_buff_length) + 1;
unknown's avatar
unknown committed
6841
  	}
6842

unknown's avatar
unknown committed
6843 6844 6845
	dict_table_autoinc_initialize(prebuilt->table, auto_inc);

func_exit:
unknown's avatar
unknown committed
6846
  	(void) extra(HA_EXTRA_NO_KEYREAD);
6847

unknown's avatar
unknown committed
6848 6849 6850 6851
	index_end();

	*ret = auto_inc;

unknown's avatar
unknown committed
6852 6853
func_exit_early:
	/* Since MySQL does not seem to call autocommit after SHOW TABLE
unknown's avatar
unknown committed
6854
	STATUS (even if we would register the trx here), we commit our
unknown's avatar
unknown committed
6855
	transaction here if it was started here. This is to eliminate a
unknown's avatar
unknown committed
6856 6857 6858
	dangling transaction. If the user had AUTOCOMMIT=0, then SHOW
	TABLE STATUS does leave a dangling transaction if the user does not
	himself call COMMIT. */
unknown's avatar
unknown committed
6859 6860 6861 6862 6863 6864 6865

	if (trx_was_not_started) {

		innobase_commit_low(prebuilt->trx);
	}

 	return(error);
unknown's avatar
unknown committed
6866 6867 6868 6869 6870 6871 6872 6873
}

/***********************************************************************
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
auto-inc counter. */

6874
ulonglong
unknown's avatar
unknown committed
6875 6876 6877 6878 6879 6880 6881
ha_innobase::get_auto_increment()
/*=============================*/
                         /* out: auto-increment column value, -1 if error
                         (deadlock or lock wait timeout) */
{
  	longlong        nr;
  	int     	error;
unknown's avatar
foo1  
unknown committed
6882

unknown's avatar
unknown committed
6883 6884 6885
	error = innobase_read_and_init_auto_inc(&nr);

	if (error) {
unknown's avatar
unknown committed
6886 6887 6888
		/* This should never happen in the current (5.0.6) code, since
		we call this function only after the counter has been
		initialized. */
unknown's avatar
foo1  
unknown committed
6889

unknown's avatar
unknown committed
6890
		ut_print_timestamp(stderr);
6891 6892
		sql_print_error("Error %lu in ::get_auto_increment()",
				(ulong) error);
unknown's avatar
unknown committed
6893
          	return(~(ulonglong) 0);
unknown's avatar
unknown committed
6894
	}
6895

6896
	return((ulonglong) nr);
6897 6898
}

6899 6900
/* See comment in handler.h */
int
unknown's avatar
unknown committed
6901
ha_innobase::reset_auto_increment(ulonglong value)
6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913
{
	DBUG_ENTER("ha_innobase::reset_auto_increment");

	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
  	int     	error;

	error = row_lock_table_autoinc_for_mysql(prebuilt);

	if (error != DB_SUCCESS) {
		error = convert_error_code_to_mysql(error, user_thd);

		DBUG_RETURN(error);
unknown's avatar
foo1  
unknown committed
6914
	}
6915

unknown's avatar
unknown committed
6916
	dict_table_autoinc_initialize(prebuilt->table, value);
6917 6918 6919 6920

	DBUG_RETURN(0);
}

6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932
/* See comment in handler.cc */
bool
ha_innobase::get_error_message(int error, String *buf)
{
	trx_t*	    trx = check_trx_exists(current_thd);

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

	return FALSE;
}

unknown's avatar
unknown committed
6933 6934 6935 6936
/***********************************************************************
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. */
unknown's avatar
unknown committed
6937

6938 6939
int
ha_innobase::cmp_ref(
unknown's avatar
unknown committed
6940 6941 6942 6943 6944 6945 6946
/*=================*/
				/* out: < 0 if ref1 < ref2, 0 if equal, else
				> 0 */
	const mysql_byte* ref1,	/* in: an (internal) primary key value in the
				MySQL key value format */
	const mysql_byte* ref2)	/* in: an (internal) primary key value in the
				MySQL key value format */
6947
{
unknown's avatar
unknown committed
6948
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
6949
	enum_field_types mysql_type;
unknown's avatar
unknown committed
6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970
	Field*		field;
	KEY_PART_INFO*	key_part;
	KEY_PART_INFO*	key_part_end;
	uint		len1;
	uint		len2;
	int 		result;

	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;

6971 6972 6973
	for (; key_part != key_part_end; ++key_part) {
		field = key_part->field;
		mysql_type = field->type();
unknown's avatar
unknown committed
6974

6975 6976 6977 6978
		if (mysql_type == FIELD_TYPE_TINY_BLOB
		    || mysql_type == FIELD_TYPE_MEDIUM_BLOB
		    || mysql_type == FIELD_TYPE_BLOB
		    || mysql_type == FIELD_TYPE_LONG_BLOB) {
unknown's avatar
foo1  
unknown committed
6979

unknown's avatar
unknown committed
6980 6981 6982 6983 6984 6985
			/* 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);

6986 6987
			ref1 += 2;
			ref2 += 2;
unknown's avatar
unknown committed
6988 6989
			result = ((Field_blob*)field)->cmp(
						    (const char*)ref1, len1,
6990 6991
			                            (const char*)ref2, len2);
		} else {
6992
			result = field->key_cmp(ref1, ref2);
unknown's avatar
unknown committed
6993 6994 6995 6996 6997
		}

		if (result) {

			return(result);
6998 6999
		}

7000 7001
		ref1 += key_part->store_length;
		ref2 += key_part->store_length;
7002
	}
unknown's avatar
unknown committed
7003 7004

	return(0);
7005 7006
}

unknown's avatar
unknown committed
7007 7008
char*
ha_innobase::get_mysql_bin_log_name()
unknown's avatar
unknown committed
7009
{
unknown's avatar
unknown committed
7010
	return(trx_sys_mysql_bin_log_name);
unknown's avatar
unknown committed
7011 7012
}

unknown's avatar
unknown committed
7013 7014
ulonglong
ha_innobase::get_mysql_bin_log_pos()
unknown's avatar
unknown committed
7015
{
unknown's avatar
unknown committed
7016 7017 7018 7019
  	/* trx... is ib_longlong, which is a typedef for a 64-bit integer
	(__int64 or longlong) so it's ok to cast it to ulonglong. */

  	return(trx_sys_mysql_bin_log_pos);
unknown's avatar
unknown committed
7020 7021
}

7022
extern "C" {
7023
/**********************************************************************
unknown's avatar
unknown committed
7024 7025 7026 7027 7028 7029 7030
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! */
7031

unknown's avatar
unknown committed
7032 7033 7034 7035 7036
ulint
innobase_get_at_most_n_mbchars(
/*===========================*/
				/* out: number of bytes occupied by the first
				n characters */
7037
	ulint charset_id,	/* in: character set id */
unknown's avatar
unknown committed
7038 7039 7040 7041 7042
	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) */
	ulint data_len,         /* in: length of the string in bytes */
	const char* str)	/* in: character string */
7043
{
7044
	ulint char_length;	/* character length in bytes */
unknown's avatar
unknown committed
7045
	ulint n_chars;		/* number of characters in prefix */
7046
	CHARSET_INFO* charset;	/* charset used in the field */
7047

unknown's avatar
unknown committed
7048
	charset = get_charset((uint) charset_id, MYF(MY_WME));
7049

7050 7051
	ut_ad(charset);
	ut_ad(charset->mbmaxlen);
7052

unknown's avatar
unknown committed
7053
	/* Calculate how many characters at most the prefix index contains */
7054

unknown's avatar
unknown committed
7055
	n_chars = prefix_len / charset->mbmaxlen;
7056

unknown's avatar
unknown committed
7057 7058 7059
	/* 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
unknown's avatar
unknown committed
7060
	character. */
7061

unknown's avatar
unknown committed
7062 7063
	if (charset->mbmaxlen > 1) {
		/* my_charpos() returns the byte length of the first n_chars
unknown's avatar
unknown committed
7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079
		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. */
unknown's avatar
unknown committed
7080

unknown's avatar
unknown committed
7081
		char_length = my_charpos(charset, str,
unknown's avatar
unknown committed
7082
						str + data_len, (int) n_chars);
unknown's avatar
unknown committed
7083 7084
		if (char_length > data_len) {
			char_length = data_len;
unknown's avatar
foo1  
unknown committed
7085
		}
unknown's avatar
unknown committed
7086
	} else {
unknown's avatar
unknown committed
7087 7088 7089 7090 7091
		if (data_len < prefix_len) {
			char_length = data_len;
		} else {
			char_length = prefix_len;
		}
7092
	}
7093

unknown's avatar
unknown committed
7094
	return(char_length);
7095 7096 7097
}
}

7098 7099
extern "C" {
/**********************************************************************
unknown's avatar
foo1  
unknown committed
7100
This function returns true if
7101 7102

1) SQL-query in the current thread
unknown's avatar
foo1  
unknown committed
7103
is either REPLACE or LOAD DATA INFILE REPLACE.
7104 7105 7106 7107

2) SQL-query in the current thread
is INSERT ON DUPLICATE KEY UPDATE.

unknown's avatar
foo1  
unknown committed
7108
NOTE that /mysql/innobase/row/row0ins.c must contain the
7109 7110 7111
prototype for this function ! */

ibool
7112
innobase_query_is_update(void)
unknown's avatar
unknown committed
7113
/*==========================*/
7114 7115
{
	THD*	thd;
unknown's avatar
foo1  
unknown committed
7116

7117
	thd = (THD *)innobase_current_thd();
unknown's avatar
foo1  
unknown committed
7118

unknown's avatar
unknown committed
7119 7120 7121 7122 7123 7124
	if (thd->lex->sql_command == SQLCOM_REPLACE ||
	    thd->lex->sql_command == SQLCOM_REPLACE_SELECT ||
	    (thd->lex->sql_command == SQLCOM_LOAD &&
	     thd->lex->duplicates == DUP_REPLACE)) {

		return(1);
7125
	}
7126

unknown's avatar
unknown committed
7127 7128 7129 7130
	if (thd->lex->sql_command == SQLCOM_INSERT &&
	    thd->lex->duplicates  == DUP_UPDATE) {

		return(1);
7131 7132
	}

unknown's avatar
unknown committed
7133
	return(0);
7134
}
unknown's avatar
unknown committed
7135 7136
}

7137 7138 7139
/***********************************************************************
This function is used to prepare X/Open XA distributed transaction   */

unknown's avatar
foo1  
unknown committed
7140
int
7141 7142
innobase_xa_prepare(
/*================*/
7143 7144 7145 7146 7147 7148 7149
			/* out: 0 or error number */
	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;
unknown's avatar
unknown committed
7150 7151 7152 7153
        trx_t* trx = check_trx_exists(thd);

        if (thd->lex->sql_command != SQLCOM_XA_PREPARE) {

unknown's avatar
unknown committed
7154 7155 7156 7157 7158 7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169 7170 7171 7172
                /* For ibbackup to work the order of transactions in binlog
                and InnoDB must be the same. Consider the situation

                  thread1> prepare; write to binlog; ...
                          <context switch>
                  thread2> prepare; write to binlog; commit
                  thread1>                           ... commit

                To ensure this will not happen we're taking the mutex on
                prepare, and releasing it on commit.

                Note: only do it for normal commits, done via ha_commit_trans.
                If 2pc protocol is executed by external transaction
                coordinator, it will be just a regular MySQL client
                executing XA PREPARE and XA COMMIT commands.
                In this case we cannot know how many minutes or hours
                will be between XA PREPARE and XA COMMIT, and we don't want
                to block for undefined period of time.
                */
unknown's avatar
unknown committed
7173 7174 7175
                pthread_mutex_lock(&prepare_commit_mutex);
                trx->active_trans = 2;
        }
7176

7177 7178 7179 7180 7181
	if (!thd->variables.innodb_support_xa) {

		return(0);
	}

7182
        trx->xid=thd->transaction.xid_state.xid;
7183 7184 7185 7186 7187 7188 7189 7190 7191

	/* 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) {

7192 7193
	  sql_print_error("trx->active_trans == 0, but trx->conc_state != "
			  "TRX_NOT_STARTED");
7194 7195
	}

unknown's avatar
unknown committed
7196 7197
	if (all
	    || (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {
unknown's avatar
unknown committed
7198 7199 7200

                /* We were instructed to prepare the whole transaction, or
                this is an SQL statement end and autocommit is on */
7201

unknown's avatar
unknown committed
7202
                ut_ad(trx->active_trans);
unknown's avatar
unknown committed
7203

unknown's avatar
unknown committed
7204
		error = (int) trx_prepare_for_mysql(trx);
7205 7206 7207 7208 7209 7210 7211
	} else {
	        /* We just mark the SQL statement ended and do not do a
		transaction prepare */

		if (trx->auto_inc_lock) {
			/* If we had reserved the auto-inc lock for some
			table in this SQL statement we release it now */
unknown's avatar
unknown committed
7212

7213 7214 7215 7216 7217 7218 7219 7220 7221 7222 7223 7224 7225 7226 7227 7228 7229 7230 7231 7232
			row_unlock_table_autoinc_for_mysql(trx);
		}
		/* 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();

        return error;
}

/***********************************************************************
This function is used to recover X/Open XA distributed transactions   */

unknown's avatar
foo1  
unknown committed
7233
int
7234 7235
innobase_xa_recover(
/*================*/
unknown's avatar
foo1  
unknown committed
7236
				/* out: number of prepared transactions
7237 7238 7239 7240 7241
				stored in xid_list */
	XID*    xid_list, 	/* in/out: prepared transactions */
	uint	len)		/* in: number of slots in xid_list */
{
	if (len == 0 || xid_list == NULL) {
unknown's avatar
unknown committed
7242 7243

		return(0);
7244 7245
	}

unknown's avatar
unknown committed
7246
	return(trx_recover_for_mysql(xid_list, len));
7247 7248 7249 7250 7251 7252
}

/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */

unknown's avatar
foo1  
unknown committed
7253
int
7254 7255
innobase_commit_by_xid(
/*===================*/
7256
			/* out: 0 or error number */
unknown's avatar
unknown committed
7257
	XID*	xid)	/* in: X/Open XA transaction identification */
7258 7259 7260 7261 7262 7263 7264
{
	trx_t*	trx;

	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		innobase_commit_low(trx);
unknown's avatar
foo1  
unknown committed
7265

7266 7267 7268 7269 7270 7271 7272 7273 7274 7275
		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 */

unknown's avatar
foo1  
unknown committed
7276
int
7277 7278
innobase_rollback_by_xid(
/*=====================*/
7279
			/* out: 0 or error number */
unknown's avatar
unknown committed
7280
	XID	*xid)	/* in: X/Open XA transaction identification */
7281 7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292
{
	trx_t*	trx;

	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		return(innobase_rollback_trx(trx));
	} else {
		return(XAER_NOTA);
	}
}

7293
/***********************************************************************
unknown's avatar
unknown committed
7294 7295
Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
unknown's avatar
foo1  
unknown committed
7296
This consistent view is then used inside of MySQL when accessing records
unknown's avatar
unknown committed
7297
using a cursor. */
7298 7299 7300 7301 7302 7303 7304 7305 7306 7307 7308

void*
innobase_create_cursor_view(void)
/*=============================*/
			/* out: Pointer to cursor view or NULL */
{
	return(read_cursor_view_create_for_mysql(
					check_trx_exists(current_thd)));
}

/***********************************************************************
unknown's avatar
unknown committed
7309
Close the given consistent cursor view of a transaction and restore
unknown's avatar
foo1  
unknown committed
7310
global read view to a transaction read view. Transaction is created if the
unknown's avatar
unknown committed
7311
corresponding MySQL thread still lacks one. */
7312 7313 7314 7315 7316 7317 7318 7319 7320 7321 7322

void
innobase_close_cursor_view(
/*=======================*/
	void*	curview)/* in: Consistent read view to be closed */
{
	read_cursor_view_close_for_mysql(check_trx_exists(current_thd),
						(cursor_view_t*) curview);
}

/***********************************************************************
unknown's avatar
foo1  
unknown committed
7323 7324
Set the given consistent cursor view to a transaction which is created
if the corresponding MySQL thread still lacks one. If the given
unknown's avatar
unknown committed
7325 7326
consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
7327 7328 7329 7330

void
innobase_set_cursor_view(
/*=====================*/
unknown's avatar
unknown committed
7331
	void*	curview)/* in: Consistent cursor view to be set */
7332
{
unknown's avatar
foo1  
unknown committed
7333
	read_cursor_set_for_mysql(check_trx_exists(current_thd),
7334 7335 7336
						(cursor_view_t*) curview);
}

7337
#endif /* HAVE_INNOBASE_DB */