row0mysql.c 59.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
/******************************************************
Interface between Innobase row operations and MySQL.
Contains also create table and other data dictionary operations.

(c) 2000 Innobase Oy

Created 9/17/2000 Heikki Tuuri
*******************************************************/

#include "row0mysql.h"

#ifdef UNIV_NONINL
#include "row0mysql.ic"
#endif

#include "row0ins.h"
#include "row0sel.h"
#include "row0upd.h"
#include "row0row.h"
#include "que0que.h"
#include "pars0pars.h"
#include "dict0dict.h"
#include "dict0crea.h"
24
#include "dict0load.h"
25 26 27
#include "trx0roll.h"
#include "trx0purge.h"
#include "lock0lock.h"
28
#include "rem0cmp.h"
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
29 30
#include "log0log.h"

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
31 32 33
/* A dummy variable used to fool the compiler */
ibool	row_mysql_identically_false	= FALSE;

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
34 35 36 37 38 39 40 41 42 43 44
/* List of tables we should drop in background. ALTER TABLE in MySQL requires
that the table handler can drop the table in background when there are no
queries to it any more. Protected by the kernel mutex. */
typedef struct row_mysql_drop_struct	row_mysql_drop_t;
struct row_mysql_drop_struct{
	char*				table_name;
	UT_LIST_NODE_T(row_mysql_drop_t) row_mysql_drop_list;
};

UT_LIST_BASE_NODE_T(row_mysql_drop_t)	row_mysql_drop_list;
ibool	row_mysql_drop_list_inited 	= FALSE;
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

/***********************************************************************
Reads a MySQL format variable-length field (like VARCHAR) length and
returns pointer to the field data. */

byte*
row_mysql_read_var_ref_noninline(
/*=============================*/
			/* out: field + 2 */
	ulint*	len,	/* out: variable-length field length */
	byte*	field)	/* in: field */
{
	return(row_mysql_read_var_ref(len, field));
}

/***********************************************************************
Stores a reference to a BLOB in the MySQL format. */

void
row_mysql_store_blob_ref(
/*=====================*/
	byte*	dest,		/* in: where to store */
	ulint	col_len,	/* in: dest buffer size: determines into
				how many bytes the BLOB length is stored,
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
69 70 71 72 73 74 75 76
				the space for the length may vary from 1
				to 4 bytes */
	byte*	data,		/* in: BLOB data; if the value to store
				is SQL NULL this should be NULL pointer */
	ulint	len)		/* in: BLOB length; if the value to store
				is SQL NULL this should be 0; remember
				also to set the NULL bit in the MySQL record
				header! */
77
{
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
78 79 80
	ulint	sum	= 0;
	ulint	i;

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
81 82 83 84 85
	/* MySQL might assume the field is set to zero except the length and
	the pointer fields */

	memset(dest, '\0', col_len);

86 87 88 89 90
	/* In dest there are 1 - 4 bytes reserved for the BLOB length,
	and after that 8 bytes reserved for the pointer to the data.
	In 32-bit architectures we only use the first 4 bytes of the pointer
	slot. */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
	ut_a(col_len - 8 > 1 || len < 256);
	ut_a(col_len - 8 > 2 || len < 256 * 256);
	ut_a(col_len - 8 > 3 || len < 256 * 256 * 256);

	/* We try to track an elusive bug which probably was fixed
	May 9, 2002, but better be sure: we probe the data buffer
	to make sure it is in valid allocated memory */

	for (i = 0; i < len; i++) {

		sum += (ulint)(data + i);
	}

	/* The variable below is identically false, we just fool the
	compiler to not optimize away our loop */
	if (row_mysql_identically_false) {

		printf("Sum %lu\n", sum);
	}

111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
	mach_write_to_n_little_endian(dest, col_len - 8, len);

	ut_memcpy(dest + col_len - 8, (byte*)&data, sizeof(byte*));	
}

/***********************************************************************
Reads a reference to a BLOB in the MySQL format. */

byte*
row_mysql_read_blob_ref(
/*====================*/
				/* out: pointer to BLOB data */
	ulint*	len,		/* out: BLOB length */
	byte*	ref,		/* in: BLOB reference in the MySQL format */
	ulint	col_len)	/* in: BLOB reference length (not BLOB
				length) */
{
	byte*	data;

	*len = mach_read_from_n_little_endian(ref, col_len - 8);

	ut_memcpy((byte*)&data, ref + col_len - 8, sizeof(byte*));

	return(data);
}

/******************************************************************
Convert a row in the MySQL format to a row in the Innobase format. */
static
void
row_mysql_convert_row_to_innobase(
/*==============================*/
	dtuple_t*	row,		/* in/out: Innobase row where the
					field type information is already
					copied there, or will be copied
					later */
	row_prebuilt_t*	prebuilt,	/* in: prebuilt struct where template
					must be of type ROW_MYSQL_WHOLE_ROW */
	byte*		mysql_rec)	/* in: row in the MySQL format;
					NOTE: do not discard as long as
					row is used, as row may contain
					pointers to this record! */
{
	mysql_row_templ_t*	templ;	
	dfield_t*		dfield;
	ulint			i;
	
	ut_ad(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);
	ut_ad(prebuilt->mysql_template);

	for (i = 0; i < prebuilt->n_template; i++) {

		templ = prebuilt->mysql_template + i;
		dfield = dtuple_get_nth_field(row, i);

		if (templ->mysql_null_bit_mask != 0) {
			/* Column may be SQL NULL */

			if (mysql_rec[templ->mysql_null_byte_offset] &
 					(byte) (templ->mysql_null_bit_mask)) {

				/* It is SQL NULL */

				dfield_set_data(dfield, NULL, UNIV_SQL_NULL);

				goto next_column;
			}
		}			
		
		row_mysql_store_col_in_innobase_format(dfield,
					prebuilt->ins_upd_rec_buff
						+ templ->mysql_col_offset,
					mysql_rec + templ->mysql_col_offset,
					templ->mysql_col_len,
					templ->type, templ->is_unsigned);
next_column:
		;
	} 
}

/********************************************************************
Handles user errors and lock waits detected by the database engine. */

ibool
row_mysql_handle_errors(
/*====================*/
				/* out: TRUE if it was a lock wait and
				we should continue running the query thread */
	ulint*		new_err,/* out: possible new error encountered in
				rollback, or the old error which was
				during the function entry */
	trx_t*		trx,	/* in: transaction */
	que_thr_t*	thr,	/* in: query thread */
204
	trx_savept_t*	savept)	/* in: savepoint or NULL */
205 206 207 208 209 210 211 212 213 214 215 216
{
	ibool	timeout_expired;
	ulint	err;

handle_new_error:
	err = trx->error_state;
	
	ut_a(err != DB_SUCCESS);
	
	trx->error_state = DB_SUCCESS;

	if (err == DB_DUPLICATE_KEY) {
217
           	if (savept) {
218 219 220 221
			/* Roll back the latest, possibly incomplete
			insertion or update */

			trx_general_rollback_for_mysql(trx, TRUE, savept);
222
		}
223
	} else if (err == DB_TOO_BIG_RECORD) {
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
224 225 226 227 228 229
           	if (savept) {
			/* Roll back the latest, possibly incomplete
			insertion or update */

			trx_general_rollback_for_mysql(trx, TRUE, savept);
		}
230
		/* MySQL will roll back the latest SQL statement */
231 232 233
	} else if (err == DB_ROW_IS_REFERENCED
		   || err == DB_NO_REFERENCED_ROW
		   || err == DB_CANNOT_ADD_CONSTRAINT) {
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
234 235 236 237 238 239
           	if (savept) {
			/* Roll back the latest, possibly incomplete
			insertion or update */

			trx_general_rollback_for_mysql(trx, TRUE, savept);
		}
240
		/* MySQL will roll back the latest SQL statement */
241 242 243 244 245
	} else if (err == DB_LOCK_WAIT) {

		timeout_expired = srv_suspend_mysql_thread(thr);

		if (timeout_expired) {
246
			trx->error_state = DB_LOCK_WAIT_TIMEOUT;
247 248 249 250 251 252 253 254 255 256

			que_thr_stop_for_mysql(thr);

			goto handle_new_error;
		}

		*new_err = err;

		return(TRUE);

257 258 259
	} else if (err == DB_DEADLOCK || err == DB_LOCK_WAIT_TIMEOUT) {
		/* Roll back the whole transaction; this resolution was added
		to version 3.23.43 */
260

261 262
		trx_general_rollback_for_mysql(trx, FALSE, NULL);
				
263
	} else if (err == DB_OUT_OF_FILE_SPACE) {
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
264 265 266 267 268 269
           	if (savept) {
			/* Roll back the latest, possibly incomplete
			insertion or update */

			trx_general_rollback_for_mysql(trx, TRUE, savept);
		}
270
		/* MySQL will roll back the latest SQL statement */
271 272 273

	} else if (err == DB_MUST_GET_MORE_FILE_SPACE) {

274 275 276 277 278 279
		fprintf(stderr,
		"InnoDB: The database cannot continue operation because of\n"
		"InnoDB: lack of space. You must add a new data file to\n"
		"InnoDB: my.cnf and restart the database.\n");
		
		exit(1);
280
	} else {
281
		fprintf(stderr, "InnoDB: unknown error code %lu\n", err);
282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
		ut_a(0);
	}		

	if (trx->error_state != DB_SUCCESS) {
		*new_err = trx->error_state;
	} else {
		*new_err = err;
	}
	
	trx->error_state = DB_SUCCESS;

	return(FALSE);
}

/************************************************************************
Create a prebuilt struct for a MySQL table handle. */

row_prebuilt_t*
row_create_prebuilt(
/*================*/
				/* out, own: a prebuilt struct */
	dict_table_t*	table)	/* in: Innobase table handle */
{
	row_prebuilt_t*	prebuilt;
	mem_heap_t*	heap;
	dict_index_t*	clust_index;
	dtuple_t*	ref;
	ulint		ref_len;
	ulint		i;
	
	heap = mem_heap_create(128);

	prebuilt = mem_heap_alloc(heap, sizeof(row_prebuilt_t));

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
316 317
	prebuilt->magic_n = ROW_PREBUILT_ALLOCATED;

318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365
	prebuilt->table = table;

	prebuilt->trx = NULL;

	prebuilt->sql_stat_start = TRUE;

	prebuilt->index = NULL;
	prebuilt->n_template = 0;
	prebuilt->mysql_template = NULL;

	prebuilt->heap = heap;
	prebuilt->ins_node = NULL;

	prebuilt->ins_upd_rec_buff = NULL;
	
	prebuilt->upd_node = NULL;
	prebuilt->ins_graph = NULL;
	prebuilt->upd_graph = NULL;

  	prebuilt->pcur = btr_pcur_create_for_mysql();
  	prebuilt->clust_pcur = btr_pcur_create_for_mysql();

	prebuilt->select_lock_type = LOCK_NONE;

	prebuilt->sel_graph = NULL;

	prebuilt->search_tuple = dtuple_create(heap,
						dict_table_get_n_cols(table));
	
	clust_index = dict_table_get_first_index(table);

	ref_len = dict_index_get_n_unique(clust_index);

	ref = dtuple_create(heap, ref_len);

	dict_index_copy_types(ref, clust_index, ref_len);

	prebuilt->clust_ref = ref;

	for (i = 0; i < MYSQL_FETCH_CACHE_SIZE; i++) {
		prebuilt->fetch_cache[i] = NULL;
	}

	prebuilt->n_fetch_cached = 0;

	prebuilt->blob_heap = NULL;

	prebuilt->old_vers_heap = NULL;
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
366

367 368 369 370 371 372 373 374 375 376 377 378 379
	return(prebuilt);
}

/************************************************************************
Free a prebuilt struct for a MySQL table handle. */

void
row_prebuilt_free(
/*==============*/
	row_prebuilt_t*	prebuilt)	/* in, own: prebuilt struct */
{
	ulint	i;

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
380 381 382 383 384 385 386 387 388 389 390 391 392
	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
		fprintf(stderr,
		"InnoDB: Error: trying to free a corrupt\n"
		"InnoDB: table handle. Magic n %lu, table name %s\n",
		prebuilt->magic_n, prebuilt->table->name);

		mem_analyze_corruption((byte*)prebuilt);

		ut_a(0);
	}

	prebuilt->magic_n = ROW_PREBUILT_FREED;

393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425
	btr_pcur_free_for_mysql(prebuilt->pcur);
	btr_pcur_free_for_mysql(prebuilt->clust_pcur);

	if (prebuilt->mysql_template) {
		mem_free(prebuilt->mysql_template);
	}

	if (prebuilt->ins_graph) {
		que_graph_free_recursive(prebuilt->ins_graph);
	}

	if (prebuilt->sel_graph) {
		que_graph_free_recursive(prebuilt->sel_graph);
	}
	
	if (prebuilt->upd_graph) {
		que_graph_free_recursive(prebuilt->upd_graph);
	}
	
	if (prebuilt->blob_heap) {
		mem_heap_free(prebuilt->blob_heap);
	}

	if (prebuilt->old_vers_heap) {
		mem_heap_free(prebuilt->old_vers_heap);
	}
	
	for (i = 0; i < MYSQL_FETCH_CACHE_SIZE; i++) {
		if (prebuilt->fetch_cache[i] != NULL) {
			mem_free(prebuilt->fetch_cache[i]);
		}
	}

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
426 427
	dict_table_decrement_handle_count(prebuilt->table);

428 429 430 431 432 433 434 435 436 437 438 439 440 441 442
	mem_heap_free(prebuilt->heap);
}

/*************************************************************************
Updates the transaction pointers in query graphs stored in the prebuilt
struct. */

void
row_update_prebuilt_trx(
/*====================*/
					/* out: prebuilt dtuple */
	row_prebuilt_t*	prebuilt,	/* in: prebuilt struct in MySQL
					handle */
	trx_t*		trx)		/* in: transaction handle */
{	
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
443
	if (trx->magic_n != TRX_MAGIC_N) {
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
444
		fprintf(stderr,
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
445 446 447
		"InnoDB: Error: trying to use a corrupt\n"
		"InnoDB: trx handle. Magic n %lu\n",
		trx->magic_n);
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
448

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
449
		mem_analyze_corruption((byte*)trx);
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
450 451 452 453 454 455 456 457 458 459 460 461 462 463 464

		ut_a(0);
	}

	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
		fprintf(stderr,
		"InnoDB: Error: trying to use a corrupt\n"
		"InnoDB: table handle. Magic n %lu, table name %s\n",
		prebuilt->magic_n, prebuilt->table->name);

		mem_analyze_corruption((byte*)prebuilt);

		ut_a(0);
	}

465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537
	prebuilt->trx = trx;

	if (prebuilt->ins_graph) {
		prebuilt->ins_graph->trx = trx;
	}

	if (prebuilt->upd_graph) {
		prebuilt->upd_graph->trx = trx;
	}

	if (prebuilt->sel_graph) {
		prebuilt->sel_graph->trx = trx;
	}	
}

/*************************************************************************
Gets pointer to a prebuilt dtuple used in insertions. If the insert graph
has not yet been built in the prebuilt struct, then this function first
builds it. */
static
dtuple_t*
row_get_prebuilt_insert_row(
/*========================*/
					/* out: prebuilt dtuple */
	row_prebuilt_t*	prebuilt)	/* in: prebuilt struct in MySQL
					handle */
{
	ins_node_t*	node;
	dtuple_t*	row;
	dict_table_t*	table	= prebuilt->table;

	ut_ad(prebuilt && table && prebuilt->trx);
	
	if (prebuilt->ins_node == NULL) {

		/* Not called before for this handle: create an insert node
		and query graph to the prebuilt struct */

		node = ins_node_create(INS_DIRECT, table, prebuilt->heap);
		
		prebuilt->ins_node = node;

		if (prebuilt->ins_upd_rec_buff == NULL) {
			prebuilt->ins_upd_rec_buff = mem_heap_alloc(
						prebuilt->heap,
						prebuilt->mysql_row_len);
		}
		
		row = dtuple_create(prebuilt->heap,
					dict_table_get_n_cols(table));

		dict_table_copy_types(row, table);

		ins_node_set_new_row(node, row);

		prebuilt->ins_graph =
			que_node_get_parent(
				pars_complete_graph_for_exec(node,
							prebuilt->trx,
							prebuilt->heap));
		prebuilt->ins_graph->state = QUE_FORK_ACTIVE;
	}

	return(prebuilt->ins_node->row);	
}

/*************************************************************************
Updates the table modification counter and calculates new estimates
for table and index statistics if necessary. */
UNIV_INLINE
void
row_update_statistics_if_needed(
/*============================*/
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
538
	dict_table_t*	table)	/* in: table */
539 540 541
{
	ulint	counter;
	
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
542
	counter = table->stat_modified_counter;
543

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
544
	table->stat_modified_counter = counter + 1;
545 546 547

	/* Calculate new statistics if 1 / 16 of table has been modified
	since the last time a statistics batch was run, or if
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
548 549 550
	stat_modified_counter > 2 000 000 000 (to avoid wrap-around).
	We calculate statistics at most every 16th round, since we may have
	a counter table which is very small and updated very often. */
551 552

	if (counter > 2000000000
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
553
	    || ((ib_longlong)counter > 16 + table->stat_n_rows / 16)) {
554

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
555
		dict_update_statistics(table);
556 557
	}	
}
558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641
		  	
/*************************************************************************
Unlocks an AUTO_INC type lock possibly reserved by trx. */

void		  	
row_unlock_table_autoinc_for_mysql(
/*===============================*/
	trx_t*	trx)	/* in: transaction */
{
	if (!trx->auto_inc_lock) {

		return;
	}

	lock_table_unlock_auto_inc(trx);
}

/*************************************************************************
Sets an AUTO_INC type lock on the table mentioned in prebuilt. The
AUTO_INC lock gives exclusive access to the auto-inc counter of the
table. The lock is reserved only for the duration of an SQL statement.
It is not compatible with another AUTO_INC or exclusive lock on the
table. */

int
row_lock_table_autoinc_for_mysql(
/*=============================*/
					/* out: error code or DB_SUCCESS */
	row_prebuilt_t*	prebuilt)	/* in: prebuilt struct in the MySQL
					table handle */
{
	trx_t*		trx 		= prebuilt->trx;
	ins_node_t*	node		= prebuilt->ins_node;
	que_thr_t*	thr;
	ulint		err;
	ibool		was_lock_wait;
	
	ut_ad(trx);
	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
	
	trx->op_info = "setting auto-inc lock";

	if (node == NULL) {
		row_get_prebuilt_insert_row(prebuilt);
		node = prebuilt->ins_node;
	}

	/* We use the insert query graph as the dummy graph needed
	in the lock module call */

	thr = que_fork_get_first_thr(prebuilt->ins_graph);

	que_thr_move_to_run_state_for_mysql(thr, trx);

run_again:
	thr->run_node = node;
	thr->prev_node = node;

	/* It may be that the current session has not yet started
	its transaction, or it has been committed: */
		
	trx_start_if_not_started(trx);

	err = lock_table(0, prebuilt->table, LOCK_AUTO_INC, thr);

	trx->error_state = err;

	if (err != DB_SUCCESS) {
		que_thr_stop_for_mysql(thr);

		was_lock_wait = row_mysql_handle_errors(&err, trx, thr, NULL);

		if (was_lock_wait) {
			goto run_again;
		}

		trx->op_info = "";

		return(err);
	}

	que_thr_stop_for_mysql_no_error(thr, trx);
		
	trx->op_info = "";
642

643 644 645
	return((int) err);	
}
					
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
/*************************************************************************
Does an insert for MySQL. */

int
row_insert_for_mysql(
/*=================*/
					/* out: error code or DB_SUCCESS */
	byte*		mysql_rec,	/* in: row in the MySQL format */
	row_prebuilt_t*	prebuilt)	/* in: prebuilt struct in MySQL
					handle */
{
	trx_savept_t	savept;
	que_thr_t*	thr;
	ulint		err;
	ibool		was_lock_wait;
	trx_t*		trx 		= prebuilt->trx;
	ins_node_t*	node		= prebuilt->ins_node;
	
	ut_ad(trx);
	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
	
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
667 668 669 670 671 672 673 674 675 676 677
	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
		fprintf(stderr,
		"InnoDB: Error: trying to free a corrupt\n"
		"InnoDB: table handle. Magic n %lu, table name %s\n",
		prebuilt->magic_n, prebuilt->table->name);

		mem_analyze_corruption((byte*)prebuilt);

		ut_a(0);
	}

678 679 680 681 682 683 684 685 686 687 688
	if (srv_created_new_raw || srv_force_recovery) {
		fprintf(stderr,
		"InnoDB: A new raw disk partition was initialized or\n"
		"InnoDB: innodb_force_recovery is on: we do not allow\n"
		"InnoDB: database modifications by the user. Shut down\n"
		"InnoDB: mysqld and edit my.cnf so that newraw is replaced\n"
		"InnoDB: with raw, and innodb_force_... is removed.\n");

		return(DB_ERROR);
	}

689 690
	trx->op_info = "inserting";

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
691 692
	trx_start_if_not_started(trx);

693 694 695 696 697
	if (node == NULL) {
		row_get_prebuilt_insert_row(prebuilt);
		node = prebuilt->ins_node;
	}

698 699
	row_mysql_convert_row_to_innobase(node->row, prebuilt, mysql_rec);
	
700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729
	savept = trx_savept_take(trx);
	
	thr = que_fork_get_first_thr(prebuilt->ins_graph);

	if (prebuilt->sql_stat_start) {
		node->state = INS_NODE_SET_IX_LOCK;
		prebuilt->sql_stat_start = FALSE;
	} else {
		node->state = INS_NODE_ALLOC_ROW_ID;
	}
	
	que_thr_move_to_run_state_for_mysql(thr, trx);

run_again:
	thr->run_node = node;
	thr->prev_node = node;

	row_ins_step(thr);
	
	err = trx->error_state;

	if (err != DB_SUCCESS) {
		que_thr_stop_for_mysql(thr);

		was_lock_wait = row_mysql_handle_errors(&err, trx, thr,
								&savept);
		if (was_lock_wait) {
			goto run_again;
		}

730 731
		trx->op_info = "";

732 733 734 735 736 737 738
		return(err);
	}

	que_thr_stop_for_mysql_no_error(thr, trx);
	
	prebuilt->table->stat_n_rows++;

739 740
	srv_n_rows_inserted++;
	
741 742 743 744 745
	if (prebuilt->table->stat_n_rows == 0) {
		/* Avoid wrap-over */
		prebuilt->table->stat_n_rows--;
	}	

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
746
	row_update_statistics_if_needed(prebuilt->table);
747
	trx->op_info = "";
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778

	return((int) err);
}

/*************************************************************************
Builds a dummy query graph used in selects. */

void
row_prebuild_sel_graph(
/*===================*/
	row_prebuilt_t*	prebuilt)	/* in: prebuilt struct in MySQL
					handle */
{
	sel_node_t*	node;

	ut_ad(prebuilt && prebuilt->trx);
	
	if (prebuilt->sel_graph == NULL) {

		node = sel_node_create(prebuilt->heap);
				
		prebuilt->sel_graph =
			que_node_get_parent(
				pars_complete_graph_for_exec(node,
							prebuilt->trx,
							prebuilt->heap));

		prebuilt->sel_graph->state = QUE_FORK_ACTIVE;
	}
}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815
/*************************************************************************
Creates an query graph node of 'update' type to be used in the MySQL
interface. */

upd_node_t*
row_create_update_node_for_mysql(
/*=============================*/
				/* out, own: update node */
	dict_table_t*	table,	/* in: table to update */
	mem_heap_t*	heap)	/* in: mem heap from which allocated */
{
	upd_node_t*	node;

	node = upd_node_create(heap);
		
	node->in_mysql_interface = TRUE;
	node->is_delete = FALSE;
	node->searched_update = FALSE;
	node->select_will_do_update = FALSE;
	node->select = NULL;
	node->pcur = btr_pcur_create_for_mysql();
	node->table = table;

	node->update = upd_create(dict_table_get_n_cols(table), heap);

	node->update_n_fields = dict_table_get_n_cols(table);
	
	UT_LIST_INIT(node->columns);
	node->has_clust_rec_x_lock = TRUE;
	node->cmpl_info = 0;

	node->table_sym = NULL;
	node->col_assign_list = NULL;

	return(node);
}

816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837
/*************************************************************************
Gets pointer to a prebuilt update vector used in updates. If the update
graph has not yet been built in the prebuilt struct, then this function
first builds it. */

upd_t*
row_get_prebuilt_update_vector(
/*===========================*/
					/* out: prebuilt update vector */
	row_prebuilt_t*	prebuilt)	/* in: prebuilt struct in MySQL
					handle */
{
	dict_table_t*	table	= prebuilt->table;
	upd_node_t*	node;

	ut_ad(prebuilt && table && prebuilt->trx);
	
	if (prebuilt->upd_node == NULL) {

		/* Not called before for this handle: create an update node
		and query graph to the prebuilt struct */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
838
		node = row_create_update_node_for_mysql(table, prebuilt->heap);
839

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
840
		prebuilt->upd_node = node;
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869
		
		prebuilt->upd_graph =
			que_node_get_parent(
				pars_complete_graph_for_exec(node,
							prebuilt->trx,
							prebuilt->heap));
		prebuilt->upd_graph->state = QUE_FORK_ACTIVE;
	}

	return(prebuilt->upd_node->update);
}

/*************************************************************************
Does an update or delete of a row for MySQL. */

int
row_update_for_mysql(
/*=================*/
					/* out: error code or DB_SUCCESS */
	byte*		mysql_rec,	/* in: the row to be updated, in
					the MySQL format */
	row_prebuilt_t*	prebuilt)	/* in: prebuilt struct in MySQL
					handle */
{
	trx_savept_t	savept;
	ulint		err;
	que_thr_t*	thr;
	ibool		was_lock_wait;
	dict_index_t*	clust_index; 
870
/*	ulint		ref_len; */
871 872 873
	upd_node_t*	node;
	dict_table_t*	table		= prebuilt->table;
	trx_t*		trx		= prebuilt->trx;
874
/*	mem_heap_t*	heap;
875 876
	dtuple_t*	search_tuple;
	dtuple_t*	row_tuple;
877
	mtr_t		mtr; */
878 879 880
	
	ut_ad(prebuilt && trx);
	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
881 882
	UT_NOT_USED(mysql_rec);
	
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
883 884 885 886 887 888 889 890 891 892 893
	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
		fprintf(stderr,
		"InnoDB: Error: trying to free a corrupt\n"
		"InnoDB: table handle. Magic n %lu, table name %s\n",
		prebuilt->magic_n, prebuilt->table->name);

		mem_analyze_corruption((byte*)prebuilt);

		ut_a(0);
	}

894 895 896 897 898 899 900 901 902 903 904
	if (srv_created_new_raw || srv_force_recovery) {
		fprintf(stderr,
		"InnoDB: A new raw disk partition was initialized or\n"
		"InnoDB: innodb_force_recovery is on: we do not allow\n"
		"InnoDB: database modifications by the user. Shut down\n"
		"InnoDB: mysqld and edit my.cnf so that newraw is replaced\n"
		"InnoDB: with raw, and innodb_force_... is removed.\n");

		return(DB_ERROR);
	}

905 906
	trx->op_info = "updating or deleting";

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
907 908
	trx_start_if_not_started(trx);

909 910 911 912
	node = prebuilt->upd_node;

	clust_index = dict_table_get_first_index(table);

913
	if (prebuilt->pcur->btr_cur.index == clust_index) {
914
		btr_pcur_copy_stored_position(node->pcur, prebuilt->pcur);
915 916
	} else {
		btr_pcur_copy_stored_position(node->pcur, prebuilt->clust_pcur);
917
	}
918 919 920 921 922 923 924 925 926 927
		
	ut_a(node->pcur->rel_pos == BTR_PCUR_ON);
	 	
	/* MySQL seems to call rnd_pos before updating each row it
	has cached: we can get the correct cursor position from
	prebuilt->pcur; NOTE that we cannot build the row reference
	from mysql_rec if the clustered index was automatically
	generated for the table: MySQL does not know anything about
	the row id used as the clustered index key */

928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
	savept = trx_savept_take(trx);
	
	thr = que_fork_get_first_thr(prebuilt->upd_graph);

	node->state = UPD_NODE_UPDATE_CLUSTERED;

	ut_ad(!prebuilt->sql_stat_start);

	que_thr_move_to_run_state_for_mysql(thr, trx);
run_again:
	thr->run_node = node;
	thr->prev_node = node;

	row_upd_step(thr);

	err = trx->error_state;

	if (err != DB_SUCCESS) {
		que_thr_stop_for_mysql(thr);
		
		if (err == DB_RECORD_NOT_FOUND) {
			trx->error_state = DB_SUCCESS;
950
			trx->op_info = "";
951 952 953 954 955 956 957 958 959 960

			return((int) err);
		}
	
		was_lock_wait = row_mysql_handle_errors(&err, trx, thr,
								&savept);
		if (was_lock_wait) {
			goto run_again;
		}

961 962
		trx->op_info = "";

963 964 965 966 967
		return(err);
	}

	que_thr_stop_for_mysql_no_error(thr, trx);

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
968
	if (node->is_delete) {
969 970 971
		if (prebuilt->table->stat_n_rows > 0) {
			prebuilt->table->stat_n_rows--;
		}
972 973 974 975 976

		srv_n_rows_deleted++;
	} else {
		srv_n_rows_updated++;
	}
977

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
978
	row_update_statistics_if_needed(prebuilt->table);
979

980 981
	trx->op_info = "";

982 983 984
	return((int) err);
}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037
/**************************************************************************
Does a cascaded delete or set null in a foreign key operation. */

ulint
row_update_cascade_for_mysql(
/*=========================*/
				/* out: error code or DB_SUCCESS */
	que_thr_t*	thr,	/* in: query thread */
	upd_node_t*	node,	/* in: update node used in the cascade
				or set null operation */
	dict_table_t*	table)	/* in: table where we do the operation */
{
	ulint		err;
	trx_t*		trx;

	trx = thr_get_trx(thr);

run_again:
	thr->run_node = node;
	thr->prev_node = node;

	row_upd_step(thr);

	err = trx->error_state;

	if (err == DB_LOCK_WAIT) {
		que_thr_stop_for_mysql(thr);
	
		row_mysql_handle_errors(&err, trx, thr, NULL);

		goto run_again;
	}

	if (err != DB_SUCCESS) {

		return(err);
	}

	if (node->is_delete) {
		if (table->stat_n_rows > 0) {
			table->stat_n_rows--;
		}

		srv_n_rows_deleted++;
	} else {
		srv_n_rows_updated++;
	}

	row_update_statistics_if_needed(table);

	return(err);
}

1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058
/*************************************************************************
Checks if a table is such that we automatically created a clustered
index on it (on row id). */

ibool
row_table_got_default_clust_index(
/*==============================*/
	dict_table_t*	table)
{
	dict_index_t*	clust_index;

	clust_index = dict_table_get_first_index(table);

	if (dtype_get_mtype(dict_index_get_nth_type(clust_index, 0))
	 							== DATA_SYS) {
	 	return(TRUE);
	}

	return(FALSE);
}

1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
/*************************************************************************
Calculates the key number used inside MySQL for an Innobase index. We have
to take into account if we generated a default clustered index for the table */

ulint
row_get_mysql_key_number_for_index(
/*===============================*/
	dict_index_t*	index)
{
	dict_index_t*	ind;
	ulint		i;

	ut_a(index);

	i = 0;
	ind = dict_table_get_first_index(index->table);

	while (index != ind) {
		ind = dict_table_get_next_index(ind);
		i++;
	}

	if (row_table_got_default_clust_index(index->table)) {
		ut_a(i > 0);
		i--;
	}

	return(i);
}

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
/*************************************************************************
Recovers an orphaned tmp table inside InnoDB by renaming it. In the table
name #sql becomes rsql, and "_recover_innodb_tmp_table" is catenated to
the end of name. table->name should be of the form
"dbname/rsql..._recover_innodb_tmp_table". This renames a table whose
name is "#sql..." */
static
int
row_mysql_recover_tmp_table(
/*========================*/
				/* out: error code or DB_SUCCESS */
	dict_table_t*	table,	/* in: table definition */
	trx_t*		trx)	/* in: transaction handle */
{
	char*	ptr;
	char	old_name[1000];

	ut_memcpy(old_name, table->name, ut_strlen(table->name) + 1);

	ptr = old_name;

	for (;;) {
		if (ptr >= old_name + ut_strlen(table->name) - 6) {
			trx_commit_for_mysql(trx);

			return(DB_ERROR);
		}

		if (0 == ut_memcmp(ptr, "/rsql", 5)) {
			ptr++;
			*ptr = '#';

			break;
		}

		ptr++;
	}

	old_name[ut_strlen(table->name)
			- ut_strlen("_recover_innodb_tmp_table")] = '\0';

	return(row_rename_table_for_mysql(old_name, table->name, trx));
}

1133
/*************************************************************************
1134 1135 1136
Does a table creation operation for MySQL. If the name of the created
table ends to characters INNODB_MONITOR, then this also starts
printing of monitor output by the master thread. */
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147

int
row_create_table_for_mysql(
/*=======================*/
				/* out: error code or DB_SUCCESS */
	dict_table_t*	table,	/* in: table definition */
	trx_t*		trx)	/* in: transaction handle */
{
	tab_node_t*	node;
	mem_heap_t*	heap;
	que_thr_t*	thr;
1148 1149
	ulint		namelen;
	ulint		keywordlen;
1150 1151 1152 1153
	ulint		err;

	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
	
1154 1155 1156 1157 1158 1159 1160 1161
	if (srv_created_new_raw || srv_force_recovery) {
		fprintf(stderr,
		"InnoDB: A new raw disk partition was initialized or\n"
		"InnoDB: innodb_force_recovery is on: we do not allow\n"
		"InnoDB: database modifications by the user. Shut down\n"
		"InnoDB: mysqld and edit my.cnf so that newraw is replaced\n"
		"InnoDB: with raw, and innodb_force_... is removed.\n");

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1162 1163
		trx_commit_for_mysql(trx);

1164 1165 1166
		return(DB_ERROR);
	}

1167 1168
	trx->op_info = "creating table";

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
	if (0 == ut_strcmp(table->name, "mysql/host")
	    || 0 == ut_strcmp(table->name, "mysql/user")
	    || 0 == ut_strcmp(table->name, "mysql/db")) {
	    	
		fprintf(stderr,
    "InnoDB: Error: trying to create a MySQL system table %s of type InnoDB.\n"
    "InnoDB: MySQL system tables must be of the MyISAM type!\n",
		table->name);

		trx_commit_for_mysql(trx);

		return(DB_ERROR);
	}

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
1183 1184
	trx_start_if_not_started(trx);

1185 1186
	namelen = ut_strlen(table->name);

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
	keywordlen = ut_strlen("_recover_innodb_tmp_table");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(table->name + namelen - keywordlen,
 				"_recover_innodb_tmp_table", keywordlen)) {

		/* MySQL prevents accessing of tables whose name begins
		with #sql, that is temporary tables. If mysqld crashes in
		the middle of an ALTER TABLE, we may get an orphaned
		#sql-table in the tablespace. We have here a special
		mechanism to recover such tables by renaming them to
		rsql... */
 				
		return(row_mysql_recover_tmp_table(table, trx));
	}

	namelen = ut_strlen(table->name);

1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
	keywordlen = ut_strlen("innodb_monitor");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(table->name + namelen - keywordlen,
 				"innodb_monitor", keywordlen)) {

		/* Table name ends to characters innodb_monitor:
		start monitor prints */
 				
		srv_print_innodb_monitor = TRUE;

		/* The lock timeout monitor thread also takes care
		of InnoDB monitor prints */

		os_event_set(srv_lock_timeout_thread_event);
	}

	keywordlen = ut_strlen("innodb_lock_monitor");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(table->name + namelen - keywordlen,
 				"innodb_lock_monitor", keywordlen)) {

		srv_print_innodb_monitor = TRUE;
		srv_print_innodb_lock_monitor = TRUE;
		os_event_set(srv_lock_timeout_thread_event);
	}

	keywordlen = ut_strlen("innodb_tablespace_monitor");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(table->name + namelen - keywordlen,
 				"innodb_tablespace_monitor", keywordlen)) {

		srv_print_innodb_tablespace_monitor = TRUE;
		os_event_set(srv_lock_timeout_thread_event);
	}

	keywordlen = ut_strlen("innodb_table_monitor");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(table->name + namelen - keywordlen,
 				"innodb_table_monitor", keywordlen)) {

		srv_print_innodb_table_monitor = TRUE;
		os_event_set(srv_lock_timeout_thread_event);
	}

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272
	keywordlen = ut_strlen("innodb_mem_validate");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(table->name + namelen - keywordlen,
 				"innodb_mem_validate", keywordlen)) {

	        /* We define here a debugging feature intended for
		developers */

	        printf("Validating InnoDB memory:\n"
		 "to use this feature you must compile InnoDB with\n"
		 "UNIV_MEM_DEBUG defined in univ.i and the server must be\n"
		 "quiet because allocation from a mem heap is not protected\n"
		       "by any semaphore.\n");

		ut_a(mem_validate());
		      
		printf("Memory validated\n");
	}

1273 1274 1275
	/* Serialize data dictionary operations with dictionary mutex:
	no deadlocks can occur then in these operations */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1276
	rw_lock_x_lock(&(dict_foreign_key_check_lock));
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294
	mutex_enter(&(dict_sys->mutex));

	heap = mem_heap_create(512);

	trx->dict_operation = TRUE;
	
	node = tab_create_graph_create(table, heap);

	thr = pars_complete_graph_for_exec(node, trx, heap);

	ut_a(thr == que_fork_start_command(que_node_get_parent(thr),
						SESS_COMM_EXECUTE, 0));
	que_run_threads(thr);

	err = trx->error_state;

	if (err != DB_SUCCESS) {
		/* We have special error handling here */
1295
		
1296 1297 1298 1299
		trx->error_state = DB_SUCCESS;
		
		trx_general_rollback_for_mysql(trx, FALSE, NULL);

1300
		if (err == DB_OUT_OF_FILE_SPACE) {
1301 1302 1303
			fprintf(stderr, 
     "InnoDB: Warning: cannot create table %s because tablespace full\n",
				 table->name);
1304
		     	row_drop_table_for_mysql(table->name, trx, TRUE);
1305
		} else {
1306
		       	ut_a(err == DB_DUPLICATE_KEY);
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1307 1308 1309

	    		ut_print_timestamp(stderr);

1310
			fprintf(stderr, 
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1311
     "  InnoDB: Error: table %s already exists in InnoDB internal\n"
1312 1313
     "InnoDB: data dictionary. Have you deleted the .frm file\n"
     "InnoDB: and not used DROP TABLE? Have you used DROP DATABASE\n"
1314
     "InnoDB: for InnoDB tables in MySQL version <= 3.23.43?\n"
1315
     "InnoDB: See the Restrictions section of the InnoDB manual.\n",
1316
				 table->name);
1317 1318 1319 1320 1321 1322
			fprintf(stderr,
     "InnoDB: You can drop the orphaned table inside InnoDB by\n"
     "InnoDB: creating an InnoDB table with the same name in another\n"
     "InnoDB: database and moving the .frm file to the current database.\n"
     "InnoDB: Then MySQL thinks the table exists, and DROP TABLE will\n"
     "InnoDB: succeed.\n");
1323
		}
1324 1325 1326 1327 1328

		trx->error_state = DB_SUCCESS;
	}

	mutex_exit(&(dict_sys->mutex));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1329 1330
	rw_lock_x_unlock(&(dict_foreign_key_check_lock));

1331
	que_graph_free((que_t*) que_node_get_parent(thr));
1332 1333 1334

	trx->op_info = "";

1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
	return((int) err);
}

/*************************************************************************
Does an index creation operation for MySQL. TODO: currently failure
to create an index results in dropping the whole table! This is no problem
currently as all indexes must be created at the same time as the table. */

int
row_create_index_for_mysql(
/*=======================*/
					/* out: error number or DB_SUCCESS */
	dict_index_t*	index,		/* in: index defintion */
	trx_t*		trx)		/* in: transaction handle */
{
	ind_node_t*	node;
	mem_heap_t*	heap;
	que_thr_t*	thr;
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1353 1354
	ulint		namelen;
	ulint		keywordlen;
1355 1356 1357 1358
	ulint		err;
	
	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
	
1359 1360
	trx->op_info = "creating index";

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
1361 1362
	trx_start_if_not_started(trx);

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374
	namelen = ut_strlen(index->table_name);

	keywordlen = ut_strlen("_recover_innodb_tmp_table");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(
				index->table_name + namelen - keywordlen,
 				"_recover_innodb_tmp_table", keywordlen)) {

		return(DB_SUCCESS);
	}

1375 1376 1377
	/* Serialize data dictionary operations with dictionary mutex:
	no deadlocks can occur then in these operations */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1378
	rw_lock_x_lock(&(dict_foreign_key_check_lock));
1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408
	mutex_enter(&(dict_sys->mutex));

	heap = mem_heap_create(512);

	trx->dict_operation = TRUE;

	node = ind_create_graph_create(index, heap);

	thr = pars_complete_graph_for_exec(node, trx, heap);

	ut_a(thr == que_fork_start_command(que_node_get_parent(thr),
						SESS_COMM_EXECUTE, 0));
	que_run_threads(thr);

	err = trx->error_state;

	if (err != DB_SUCCESS) {
		/* We have special error handling here */
		ut_a(err == DB_OUT_OF_FILE_SPACE);
		
		trx->error_state = DB_SUCCESS;

		trx_general_rollback_for_mysql(trx, FALSE, NULL);

		row_drop_table_for_mysql(index->table_name, trx, TRUE);

		trx->error_state = DB_SUCCESS;
	}

	mutex_exit(&(dict_sys->mutex));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1409
	rw_lock_x_unlock(&(dict_foreign_key_check_lock));
1410 1411 1412

	que_graph_free((que_t*) que_node_get_parent(thr));
	
1413 1414
	trx->op_info = "";

1415 1416 1417
	return((int) err);
}

1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439
/*************************************************************************
Scans a table create SQL string and adds to the data dictionary
the foreign key constraints declared in the string. This function
should be called after the indexes for a table have been created.
Each foreign key constraint must be accompanied with indexes in
bot participating tables. The indexes are allowed to contain more
fields than mentioned in the constraint. Check also that foreign key
constraints which reference this table are ok. */

int
row_table_add_foreign_constraints(
/*==============================*/
				/* out: error code or DB_SUCCESS */
	trx_t*	trx,		/* in: transaction */
	char*	sql_string,	/* in: table create statement where
				foreign keys are declared like:
				FOREIGN KEY (a, b) REFERENCES table2(c, d),
				table2 can be written also with the database
				name before it: test.table2 */
	char*	name)		/* in: table full name in the normalized form
				database_name/table_name */
{
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1440 1441
	ulint	namelen;
	ulint	keywordlen;
1442 1443 1444 1445 1446 1447
	ulint	err;

	ut_a(sql_string);
	
	trx->op_info = "adding foreign keys";

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
1448 1449
	trx_start_if_not_started(trx);

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461
	namelen = ut_strlen(name);

	keywordlen = ut_strlen("_recover_innodb_tmp_table");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(
				name + namelen - keywordlen,
 				"_recover_innodb_tmp_table", keywordlen)) {

		return(DB_SUCCESS);
	}

1462 1463 1464
	/* Serialize data dictionary operations with dictionary mutex:
	no deadlocks can occur then in these operations */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1465
	rw_lock_x_lock(&(dict_foreign_key_check_lock));
1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
	mutex_enter(&(dict_sys->mutex));

	trx->dict_operation = TRUE;

	err = dict_create_foreign_constraints(trx, sql_string, name);

	if (err == DB_SUCCESS) {
		/* Check that also referencing constraints are ok */
		err = dict_load_foreigns(name);
	}

	if (err != DB_SUCCESS) {
		/* We have special error handling here */
		
		trx->error_state = DB_SUCCESS;

		trx_general_rollback_for_mysql(trx, FALSE, NULL);

		row_drop_table_for_mysql(name, trx, TRUE);

		trx->error_state = DB_SUCCESS;
	}

	mutex_exit(&(dict_sys->mutex));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1490
	rw_lock_x_unlock(&(dict_foreign_key_check_lock));
1491 1492 1493 1494

	return((int) err);
}

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577
/*************************************************************************
Drops a table for MySQL as a background operation. MySQL relies on Unix
in ALTER TABLE to the fact that the table handler does not remove the
table before all handles to it has been removed. Furhermore, the MySQL's
call to drop table must be non-blocking. Therefore we do the drop table
as a background operation, which is taken care of by the master thread
in srv0srv.c. */
static
int
row_drop_table_for_mysql_in_background(
/*===================================*/
			/* out: error code or DB_SUCCESS */
	char*	name)	/* in: table name */
{
	ulint	error;
	trx_t*	trx;

	trx = trx_allocate_for_background();

/*	fprintf(stderr, "InnoDB: Dropping table %s in background drop list\n",
							name); */
  	/* Drop the table in InnoDB */

  	error = row_drop_table_for_mysql(name, trx, FALSE);

	if (error != DB_SUCCESS) {
		fprintf(stderr,
	"InnoDB: Error: Dropping table %s in background drop list failed\n",
								name);
	}
  	
	/* Flush the log to reduce probability that the .frm files and
	the InnoDB data dictionary get out-of-sync if the user runs
	with innodb_flush_log_at_trx_commit = 0 */
	
	log_flush_up_to(ut_dulint_max, LOG_WAIT_ONE_GROUP);

  	trx_commit_for_mysql(trx);

  	trx_free_for_background(trx);

	return(DB_SUCCESS);
}

/*************************************************************************
The master thread in srv0srv.c calls this regularly to drop tables which
we must drop in background after queries to them have ended. Such lazy
dropping of tables is needed in ALTER TABLE on Unix. */

ulint
row_drop_tables_for_mysql_in_background(void)
/*=========================================*/
					/* out: how many tables dropped
					+ remaining tables in list */
{
	row_mysql_drop_t*	drop;
	dict_table_t*		table;
	ulint			n_tables;
	ulint			n_tables_dropped = 0;
loop:	
	mutex_enter(&kernel_mutex);

	if (!row_mysql_drop_list_inited) {

		UT_LIST_INIT(row_mysql_drop_list);
		row_mysql_drop_list_inited = TRUE;
	}

	drop = UT_LIST_GET_FIRST(row_mysql_drop_list);
	
	n_tables = UT_LIST_GET_LEN(row_mysql_drop_list);

	mutex_exit(&kernel_mutex);

	if (drop == NULL) {

		return(n_tables + n_tables_dropped);
	}

	mutex_enter(&(dict_sys->mutex));
	table = dict_table_get_low(drop->table_name);
	mutex_exit(&(dict_sys->mutex));

1578 1579 1580 1581 1582 1583 1584
	if (table == NULL) {
	        /* If for some reason the table has already been dropped
		through some other mechanism, do not try to drop it */

	        goto already_dropped;
	}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1585 1586
	if (table->n_mysql_handles_opened > 0
				|| table->n_foreign_key_checks_running > 0) {
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1587 1588 1589 1590 1591 1592 1593 1594

		return(n_tables + n_tables_dropped);
	}

	n_tables_dropped++;
							
	row_drop_table_for_mysql_in_background(drop->table_name);

1595
already_dropped:
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1596 1597 1598 1599
	mutex_enter(&kernel_mutex);

	UT_LIST_REMOVE(row_mysql_drop_list, row_mysql_drop_list, drop);

1600 1601 1602 1603 1604
        ut_print_timestamp(stderr);
        fprintf(stderr,
		"  InnoDB: Dropped table %s in background drop queue.\n",
		drop->table_name);

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666
	mem_free(drop->table_name);

	mem_free(drop);

	mutex_exit(&kernel_mutex);

	goto loop;
}

/*************************************************************************
Get the background drop list length. NOTE: the caller must own the kernel
mutex! */

ulint
row_get_background_drop_list_len_low(void)
/*======================================*/
					/* out: how many tables in list */
{
	ut_ad(mutex_own(&kernel_mutex));

	if (!row_mysql_drop_list_inited) {

		UT_LIST_INIT(row_mysql_drop_list);
		row_mysql_drop_list_inited = TRUE;
	}
	
	return(UT_LIST_GET_LEN(row_mysql_drop_list));
}

/*************************************************************************
Adds a table to the list of tables which the master thread drops in
background. We need this on Unix because in ALTER TABLE MySQL may call
drop table even if the table has running queries on it. */
static
void
row_add_table_to_background_drop_list(
/*==================================*/
	dict_table_t*	table)	/* in: table */
{
	row_mysql_drop_t*	drop;
	
	drop = mem_alloc(sizeof(row_mysql_drop_t));

	drop->table_name = mem_alloc(1 + ut_strlen(table->name));

	ut_memcpy(drop->table_name, table->name, 1 + ut_strlen(table->name));

	mutex_enter(&kernel_mutex);

	if (!row_mysql_drop_list_inited) {

		UT_LIST_INIT(row_mysql_drop_list);
		row_mysql_drop_list_inited = TRUE;
	}

	UT_LIST_ADD_LAST(row_mysql_drop_list, row_mysql_drop_list, drop);
	
/*	fprintf(stderr, "InnoDB: Adding table %s to background drop list\n",
							drop->table_name); */
	mutex_exit(&kernel_mutex);
}

1667
/*************************************************************************
1668 1669 1670
Drops a table for MySQL. If the name of the dropped table ends to
characters INNODB_MONITOR, then this also stops printing of monitor
output by the master thread. */
1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687

int
row_drop_table_for_mysql(
/*=====================*/
				/* out: error code or DB_SUCCESS */
	char*	name,		/* in: table name */
	trx_t*	trx,		/* in: transaction handle */
	ibool	has_dict_mutex)	/* in: TRUE if the caller already owns the
				dictionary system mutex */
{
	dict_table_t*	table;
	que_thr_t*	thr;
	que_t*		graph;
	ulint		err;
	char*		str1;
	char*		str2;
	ulint		len;
1688 1689
	ulint		namelen;
	ulint		keywordlen;
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1690
	ulint		rounds	= 0;
1691
	char		buf[10000];
1692

1693 1694
	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
	ut_a(name != NULL);
1695

1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706
	if (srv_created_new_raw || srv_force_recovery) {
		fprintf(stderr,
		"InnoDB: A new raw disk partition was initialized or\n"
		"InnoDB: innodb_force_recovery is on: we do not allow\n"
		"InnoDB: database modifications by the user. Shut down\n"
		"InnoDB: mysqld and edit my.cnf so that newraw is replaced\n"
		"InnoDB: with raw, and innodb_force_... is removed.\n");

		return(DB_ERROR);
	}

1707 1708
	trx->op_info = "dropping table";

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
1709 1710
	trx_start_if_not_started(trx);

1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721
	namelen = ut_strlen(name);
	keywordlen = ut_strlen("innodb_monitor");

	if (namelen >= keywordlen
	    && 0 == ut_memcmp(name + namelen - keywordlen,
 					"innodb_monitor", keywordlen)) {

		/* Table name ends to characters innodb_monitor:
		stop monitor prints */
 				
		srv_print_innodb_monitor = FALSE;
1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741
		srv_print_innodb_lock_monitor = FALSE;
	}

	keywordlen = ut_strlen("innodb_lock_monitor");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(name + namelen - keywordlen,
 				"innodb_lock_monitor", keywordlen)) {

		srv_print_innodb_monitor = FALSE;
		srv_print_innodb_lock_monitor = FALSE;
	}

	keywordlen = ut_strlen("innodb_tablespace_monitor");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(name + namelen - keywordlen,
 				"innodb_tablespace_monitor", keywordlen)) {

		srv_print_innodb_tablespace_monitor = FALSE;
1742 1743
	}

1744 1745 1746 1747 1748 1749 1750 1751 1752
	keywordlen = ut_strlen("innodb_table_monitor");

	if (namelen >= keywordlen
		    && 0 == ut_memcmp(name + namelen - keywordlen,
 				"innodb_table_monitor", keywordlen)) {

		srv_print_innodb_table_monitor = FALSE;
	}

1753 1754 1755 1756 1757 1758 1759
	/* We use the private SQL parser of Innobase to generate the
	query graphs needed in deleting the dictionary data from system
	tables in Innobase. Deleting a row from SYS_INDEXES table also
	frees the file segments of the B-tree associated with the index. */

	str1 =
	"PROCEDURE DROP_TABLE_PROC () IS\n"
1760 1761
	"table_name CHAR;\n"
	"sys_foreign_id CHAR;\n"
1762 1763
	"table_id CHAR;\n"
	"index_id CHAR;\n"
1764
	"foreign_id CHAR;\n"
1765 1766
	"found INT;\n"
	"BEGIN\n"
1767 1768
	"table_name := '";
	
1769 1770
	str2 = 
	"';\n"
1771 1772 1773
	"SELECT ID INTO table_id\n"
	"FROM SYS_TABLES\n"
	"WHERE NAME = table_name;\n"
1774 1775 1776 1777 1778
	"IF (SQL % NOTFOUND) THEN\n"
	"	COMMIT WORK;\n"
	"	RETURN;\n"
	"END IF;\n"
	"found := 1;\n"
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802
	"SELECT ID INTO sys_foreign_id\n"
	"FROM SYS_TABLES\n"
	"WHERE NAME = 'SYS_FOREIGN';\n"
	"IF (SQL % NOTFOUND) THEN\n"
	"	found := 0;\n"
	"END IF;\n"
	"IF (table_name = 'SYS_FOREIGN') THEN\n"
	"	found := 0;\n"
	"END IF;\n"
	"IF (table_name = 'SYS_FOREIGN_COLS') THEN\n"
	"	found := 0;\n"
	"END IF;\n"
	"WHILE found = 1 LOOP\n"
	"	SELECT ID INTO foreign_id\n"
	"	FROM SYS_FOREIGN\n"
	"	WHERE FOR_NAME = table_name;\n"	
	"	IF (SQL % NOTFOUND) THEN\n"
	"		found := 0;\n"
	"	ELSE"
	"		DELETE FROM SYS_FOREIGN_COLS WHERE ID = foreign_id;\n"
	"		DELETE FROM SYS_FOREIGN WHERE ID = foreign_id;\n"
	"	END IF;\n"
	"END LOOP;\n"
	"found := 1;\n"
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831
	"WHILE found = 1 LOOP\n"
	"	SELECT ID INTO index_id\n"
	"	FROM SYS_INDEXES\n"
	"	WHERE TABLE_ID = table_id;\n"	
	"	IF (SQL % NOTFOUND) THEN\n"
	"		found := 0;\n"
	"	ELSE"
	"		DELETE FROM SYS_FIELDS WHERE INDEX_ID = index_id;\n"
	"		DELETE FROM SYS_INDEXES WHERE ID = index_id;\n"
	"	END IF;\n"
	"END LOOP;\n"
	"DELETE FROM SYS_COLUMNS WHERE TABLE_ID = table_id;\n"
	"DELETE FROM SYS_TABLES WHERE ID = table_id;\n"
	"COMMIT WORK;\n"
	"END;\n";

	len = ut_strlen(str1);

	ut_memcpy(buf, str1, len);
	ut_memcpy(buf + len, name, ut_strlen(name));

	len += ut_strlen(name);

	ut_memcpy(buf + len, str2, ut_strlen(str2) + 1);

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

	if (!has_dict_mutex) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1832 1833 1834
		/* Prevent foreign key checks while we are dropping the table */
		rw_lock_x_lock(&(dict_foreign_key_check_lock));

1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853
		mutex_enter(&(dict_sys->mutex));
	}

	graph = pars_sql(buf);

	ut_a(graph);

	graph->trx = trx;
	trx->graph = NULL;

	graph->fork_type = QUE_FORK_MYSQL_INTERFACE;

	/* Prevent purge from running while we are dropping the table */
	rw_lock_s_lock(&(purge_sys->purge_is_running));

	table = dict_table_get_low(name);

	if (!table) {
		err = DB_TABLE_NOT_FOUND;
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1854
	    	ut_print_timestamp(stderr);
1855

1856
		fprintf(stderr, 
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1857
     	"  InnoDB: Error: table %s does not exist in the InnoDB internal\n"
1858 1859 1860 1861
     	"InnoDB: data dictionary though MySQL is trying to drop it.\n"
     	"InnoDB: Have you copied the .frm file of the table to the\n"
	"InnoDB: MySQL database directory from another database?\n",
				 name);
1862 1863 1864
		goto funct_exit;
	}

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1865 1866
	if (table->n_mysql_handles_opened > 0) {
		
1867 1868 1869 1870 1871 1872 1873
	        ut_print_timestamp(stderr);
	        fprintf(stderr,
		  "  InnoDB: Warning: MySQL is trying to drop table %s\n"
		  "InnoDB: though there are still open handles to it.\n"
		  "InnoDB: Adding the table to the background drop queue.\n",
		  table->name);

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1874
		row_add_table_to_background_drop_list(table);
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1875

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1876
		err = DB_SUCCESS;
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1877

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1878
		goto funct_exit;
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1879
	}
1880

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896
	if (table->n_foreign_key_checks_running > 0) {
		
	        ut_print_timestamp(stderr);
	        fprintf(stderr,
		  "  InnoDB: You are trying to drop table %s\n"
		  "InnoDB: though there are foreign key check running on it.\n"
		  "InnoDB: Adding the table to the background drop queue.\n",
		  table->name);

		row_add_table_to_background_drop_list(table);

		err = DB_SUCCESS;

		goto funct_exit;
	}
	
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1897 1898 1899 1900
	/* Remove any locks there are on the table or its records */
	
	lock_reset_all_on_table(table);

1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
	trx->dict_operation = TRUE;
	trx->table_id = table->id;

	ut_a(thr = que_fork_start_command(graph, SESS_COMM_EXECUTE, 0));

	que_run_threads(thr);

	err = trx->error_state;

	if (err != DB_SUCCESS) {
		ut_a(err == DB_OUT_OF_FILE_SPACE);

		err = DB_MUST_GET_MORE_FILE_SPACE;
		
		row_mysql_handle_errors(&err, trx, thr, NULL);

		ut_a(0);
	} else {
		dict_table_remove_from_cache(table);
	}
funct_exit:	
	rw_lock_s_unlock(&(purge_sys->purge_is_running));

	if (!has_dict_mutex) {
		mutex_exit(&(dict_sys->mutex));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1926
		rw_lock_x_unlock(&(dict_foreign_key_check_lock));
1927 1928 1929 1930
	}

	que_graph_free(graph);
	
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1931 1932
  	trx_commit_for_mysql(trx);

1933 1934
	trx->op_info = "";

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
1935 1936
	srv_wake_master_thread();

1937 1938 1939
	return((int) err);
}

1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
/*************************************************************************
Drops a database for MySQL. */

int
row_drop_database_for_mysql(
/*========================*/
			/* out: error code or DB_SUCCESS */
	char*	name,	/* in: database name which ends to '/' */
	trx_t*	trx)	/* in: transaction handle */
{
1950
        dict_table_t* table;
1951 1952 1953 1954 1955 1956 1957 1958 1959
	char*	table_name;
	int	err	= DB_SUCCESS;
	
	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
	ut_a(name != NULL);
	ut_a(name[strlen(name) - 1] == '/');
	
	trx->op_info = "dropping database";
	
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
1960
	trx_start_if_not_started(trx);
1961
loop:
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1962
	rw_lock_x_lock(&(dict_foreign_key_check_lock));
1963 1964 1965 1966 1967
	mutex_enter(&(dict_sys->mutex));

	while (table_name = dict_get_first_table_name_in_db(name)) {
		ut_a(memcmp(table_name, name, strlen(name)) == 0);

1968 1969 1970 1971 1972 1973 1974 1975 1976 1977
		table = dict_table_get_low(table_name);

		ut_a(table);

		/* Wait until MySQL does not have any queries running on
		the table */

		if (table->n_mysql_handles_opened > 0) {
		        mutex_exit(&(dict_sys->mutex));

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
1978 1979 1980 1981 1982 1983 1984 1985 1986
			ut_print_timestamp(stderr);
			fprintf(stderr,
		"  InnoDB: Warning: MySQL is trying to drop database %s\n"
	    	"InnoDB: though there are still open handles to table %s.\n",
				name, table_name);

		        os_thread_sleep(1000000);

		        mem_free(table_name);
1987 1988 1989 1990

		        goto loop;
		}

1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
		err = row_drop_table_for_mysql(table_name, trx, TRUE);

		mem_free(table_name);

		if (err != DB_SUCCESS) {
			fprintf(stderr,
	"InnoDB: DROP DATABASE %s failed with error %lu for table %s\n",
				name, (ulint)err, table_name);
			break;
		}
	}

	mutex_exit(&(dict_sys->mutex));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2004
	rw_lock_x_unlock(&(dict_foreign_key_check_lock));
2005
	
2006 2007
	trx_commit_for_mysql(trx);

2008 2009 2010 2011 2012
	trx->op_info = "";

	return(err);
}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034
/*************************************************************************
Checks if a table name contains the string "/#sql" which denotes temporary
tables in MySQL. */
static
ibool
row_is_mysql_tmp_table_name(
/*========================*/
			/* out: TRUE if temporary table */
	char*	name)	/* in: table name in the form 'database/tablename' */
{
	ulint	i;

	for (i = 0; i <= ut_strlen(name) - 5; i++) {
		if (ut_memcmp(name + i, "/#sql", 5) == 0) {

			return(TRUE);
		}
	}

	return(FALSE);
}

2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059
/*************************************************************************
Renames a table for MySQL. */

int
row_rename_table_for_mysql(
/*=======================*/
				/* out: error code or DB_SUCCESS */
	char*	old_name,	/* in: old table name */
	char*	new_name,	/* in: new table name */
	trx_t*	trx)		/* in: transaction handle */
{
	dict_table_t*	table;
	que_thr_t*	thr;
	que_t*		graph;
	ulint		err;
	char*		str1;
	char*		str2;
	char*		str3;
	ulint		len;
	char		buf[10000];

	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
	ut_a(old_name != NULL);
	ut_a(new_name != NULL);

2060 2061 2062 2063 2064 2065 2066 2067
	if (srv_created_new_raw || srv_force_recovery) {
		fprintf(stderr,
		"InnoDB: A new raw disk partition was initialized or\n"
		"InnoDB: innodb_force_recovery is on: we do not allow\n"
		"InnoDB: database modifications by the user. Shut down\n"
		"InnoDB: mysqld and edit my.cnf so that newraw is replaced\n"
		"InnoDB: with raw, and innodb_force_... is removed.\n");

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
  		trx_commit_for_mysql(trx);
		return(DB_ERROR);
	}

	if (0 == ut_strcmp(new_name, "mysql/host")
	    || 0 == ut_strcmp(new_name, "mysql/user")
	    || 0 == ut_strcmp(new_name, "mysql/db")) {
	    	
		fprintf(stderr,
    "InnoDB: Error: trying to create a MySQL system table %s of type InnoDB.\n"
    "InnoDB: MySQL system tables must be of the MyISAM type!\n",
		new_name);

  		trx_commit_for_mysql(trx);
2082 2083 2084
		return(DB_ERROR);
	}

2085
	trx->op_info = "renaming table";
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
2086
	trx_start_if_not_started(trx);
2087

2088 2089
	str1 =
	"PROCEDURE RENAME_TABLE_PROC () IS\n"
2090 2091
	"new_table_name CHAR;\n"
	"old_table_name CHAR;\n"
2092
	"BEGIN\n"
2093
	"new_table_name :='";
2094 2095

	str2 = 
2096
	"';\nold_table_name := '";
2097

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118
	if (row_is_mysql_tmp_table_name(new_name)) {

		/* We want to preserve the original foreign key
		constraint definitions despite the name change */

		str3 =
		"';\n"
		"UPDATE SYS_TABLES SET NAME = new_table_name\n"
		"WHERE NAME = old_table_name;\n"
		"END;\n";
	} else {
		str3 =
		"';\n"
		"UPDATE SYS_TABLES SET NAME = new_table_name\n"
		"WHERE NAME = old_table_name;\n"
		"UPDATE SYS_FOREIGN SET FOR_NAME = new_table_name\n"
		"WHERE FOR_NAME = old_table_name;\n"
		"UPDATE SYS_FOREIGN SET REF_NAME = new_table_name\n"
		"WHERE REF_NAME = old_table_name;\n"
		"END;\n";
	}
2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140

	len = ut_strlen(str1);

	ut_memcpy(buf, str1, len);

	ut_memcpy(buf + len, new_name, ut_strlen(new_name));

	len += ut_strlen(new_name);

	ut_memcpy(buf + len, str2, ut_strlen(str2));

	len += ut_strlen(str2);

	ut_memcpy(buf + len, old_name, ut_strlen(old_name));

	len += ut_strlen(old_name);

	ut_memcpy(buf + len, str3, ut_strlen(str3) + 1);
	
	/* Serialize data dictionary operations with dictionary mutex:
	no deadlocks can occur then in these operations */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2141
	rw_lock_x_lock(&(dict_foreign_key_check_lock));
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167
	mutex_enter(&(dict_sys->mutex));

	table = dict_table_get_low(old_name);

	graph = pars_sql(buf);

	ut_a(graph);

	graph->trx = trx;
	trx->graph = NULL;

	graph->fork_type = QUE_FORK_MYSQL_INTERFACE;

	if (!table) {
		err = DB_TABLE_NOT_FOUND;

		goto funct_exit;
	}

	ut_a(thr = que_fork_start_command(graph, SESS_COMM_EXECUTE, 0));

	que_run_threads(thr);

	err = trx->error_state;

	if (err != DB_SUCCESS) {
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192
		if (err == DB_DUPLICATE_KEY) {
	    		ut_print_timestamp(stderr);

			fprintf(stderr,
     "  InnoDB: Error: table %s exists in the InnoDB internal data\n"
     "InnoDB: dictionary though MySQL is trying rename table %s to it.\n"
     "InnoDB: Have you deleted the .frm file and not used DROP TABLE?\n",
			new_name, old_name);

			fprintf(stderr,
     "InnoDB: If table %s is a temporary table #sql..., then it can be that\n"
     "InnoDB: there are still queries running on the table, and it will be\n"
     "InnoDB: dropped automatically when the queries end.\n", new_name);
			
			fprintf(stderr,
     "InnoDB: You can drop the orphaned table inside InnoDB by\n"
     "InnoDB: creating an InnoDB table with the same name in another\n"
     "InnoDB: database and moving the .frm file to the current database.\n"
     "InnoDB: Then MySQL thinks the table exists, and DROP TABLE will\n"
     "InnoDB: succeed.\n");
		}

		trx->error_state = DB_SUCCESS;
		trx_general_rollback_for_mysql(trx, FALSE, NULL);
		trx->error_state = DB_SUCCESS;
2193
	} else {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219
		ut_a(dict_table_rename_in_cache(table, new_name,
				!row_is_mysql_tmp_table_name(new_name)));

		if (row_is_mysql_tmp_table_name(old_name)) {

			err = dict_load_foreigns(new_name);

			if (err != DB_SUCCESS) {

	    			ut_print_timestamp(stderr);

				fprintf(stderr,
     "  InnoDB: Error: in ALTER TABLE table %s\n"
     "InnoDB: has or is referenced in foreign key constraints\n"
     "InnoDB: which are not compatible with the new table definition.\n",
     new_name);
     
				ut_a(dict_table_rename_in_cache(table,
							old_name, FALSE));
						
				trx->error_state = DB_SUCCESS;
				trx_general_rollback_for_mysql(trx, FALSE,
									NULL);
				trx->error_state = DB_SUCCESS;
			}
		}
2220 2221 2222
	}
funct_exit:	
	mutex_exit(&(dict_sys->mutex));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2223
	rw_lock_x_unlock(&(dict_foreign_key_check_lock));
2224 2225 2226

	que_graph_free(graph);
	
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
2227 2228
  	trx_commit_for_mysql(trx);

2229 2230
	trx->op_info = "";

2231 2232
	return((int) err);
}
2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256

/*************************************************************************
Checks that the index contains entries in an ascending order, unique
constraint is not broken, and calculates the number of index entries
in the read view of the current transaction. */
static
ibool
row_scan_and_check_index(
/*=====================*/
					/* out: TRUE if ok */
	row_prebuilt_t*	prebuilt,	/* in: prebuilt struct in MySQL */
	dict_index_t*	index,		/* in: index */
	ulint*		n_rows)		/* out: number of entries seen in the
					current consistent read */
{
	mem_heap_t*	heap;
	dtuple_t*	prev_entry = NULL;
	ulint		matched_fields;
	ulint		matched_bytes;
	byte*		buf;
	ulint		ret;
	rec_t*		rec;
	ibool		is_ok	= TRUE;
	int		cmp;
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
2257 2258
	ibool		contains_null;
	ulint		i;
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
2259
	char           	err_buf[1000];
2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
	
	*n_rows = 0;
	
	buf = mem_alloc(UNIV_PAGE_SIZE);
	heap = mem_heap_create(100);
	
	/* Make a dummy template in prebuilt, which we will use
	in scanning the index entries */

	prebuilt->index = index;
	prebuilt->sql_stat_start = TRUE;
	prebuilt->template_type = ROW_MYSQL_DUMMY_TEMPLATE;
	prebuilt->n_template = 0;
	prebuilt->need_to_access_clustered = FALSE;

 	dtuple_set_n_fields(prebuilt->search_tuple, 0);

	prebuilt->select_lock_type = LOCK_NONE;

	ret = row_search_for_mysql(buf, PAGE_CUR_G, prebuilt, 0, 0);
loop:
	if (ret != DB_SUCCESS) {

		mem_free(buf);
		mem_heap_free(heap);

		return(is_ok);
	}

	*n_rows = *n_rows + 1;
	
	/* row_search... returns the index record in buf, record origin offset
	within buf stored in the first 4 bytes, because we have built a dummy
	template */
	
	rec = buf + mach_read_from_4(buf);
	
	if (prev_entry != NULL) {
		matched_fields = 0;
		matched_bytes = 0;
	
		cmp = cmp_dtuple_rec_with_match(prev_entry, rec,
						&matched_fields,
						&matched_bytes);
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318
		contains_null = FALSE;

		/* In a unique secondary index we allow equal key values if
		they contain SQL NULLs */

	        for (i = 0;
                     i < dict_index_get_n_ordering_defined_by_user(index);
		     i++) {
	                if (UNIV_SQL_NULL == dfield_get_len(
                                      dtuple_get_nth_field(prev_entry, i))) {

                        	contains_null = TRUE;
	                }
	        }

2319 2320 2321
		if (cmp > 0) {
			fprintf(stderr,
			"Error: index records in a wrong order in index %s\n",
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
2322 2323 2324 2325 2326 2327 2328
								index->name);

	  		dtuple_sprintf(err_buf, 900, prev_entry);
	  		fprintf(stderr, "InnoDB: prev record %s\n", err_buf);

	  		rec_sprintf(err_buf, 900, rec);
	  		fprintf(stderr, "InnoDB: record %s\n", err_buf);
2329 2330 2331

			is_ok = FALSE;
		} else if ((index->type & DICT_UNIQUE)
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
2332
			   && !contains_null
2333 2334
			   && matched_fields >=
			   dict_index_get_n_ordering_defined_by_user(index)) {
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
2335 2336 2337 2338 2339 2340 2341 2342 2343

			fprintf(stderr, "Error: duplicate key in index %s\n",
								index->name);

	  		dtuple_sprintf(err_buf, 900, prev_entry);
	  		fprintf(stderr, "InnoDB: prev record %s\n", err_buf);

	  		rec_sprintf(err_buf, 900, rec);
	  		fprintf(stderr, "InnoDB: record %s\n", err_buf);
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

			is_ok = FALSE;			   	
		}
	}

	mem_heap_empty(heap);
	
	prev_entry = row_rec_to_index_entry(ROW_COPY_DATA, index, rec, heap);

	ret = row_search_for_mysql(buf, PAGE_CUR_G, prebuilt, 0, ROW_SEL_NEXT);	

	goto loop;	
}

/*************************************************************************
Checks a table for corruption. */

ulint
row_check_table_for_mysql(
/*======================*/
					/* out: DB_ERROR or DB_SUCCESS */
	row_prebuilt_t*	prebuilt)	/* in: prebuilt struct in MySQL
					handle */
{
	dict_table_t*	table	= prebuilt->table;
	dict_index_t*	index;
	ulint		n_rows;
2371
	ulint		n_rows_in_table	= ULINT_UNDEFINED;
2372
	ulint		ret 	= DB_SUCCESS;
2373 2374

	prebuilt->trx->op_info = "checking table";
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
2375

2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406
	index = dict_table_get_first_index(table);

	while (index != NULL) {
      /*        fprintf(stderr, "Validating index %s\n", index->name); */
	
		if (!btr_validate_tree(index->tree)) {
			ret = DB_ERROR;
		} else {
			if (!row_scan_and_check_index(prebuilt,
							index, &n_rows)) {
				ret = DB_ERROR;
			}

			/* fprintf(stderr, "%lu entries in index %s\n", n_rows,
			  index->name); */

			if (index == dict_table_get_first_index(table)) {
				n_rows_in_table = n_rows;
			} else if (n_rows != n_rows_in_table) {

				ret = DB_ERROR;
 
				fprintf(stderr,
		"Error: index %s contains %lu entries, should be %lu\n",
					index->name, n_rows, n_rows_in_table);
			}
		}

		index = dict_table_get_next_index(index);
	}

2407 2408
	prebuilt->trx->op_info = "";

2409 2410
	return(ret);
}