ha_innobase.cc 88.1 KB
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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & InnoDB Oy
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
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   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.
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   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

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/* This file defines the InnoDB handler: the interface between MySQL and
InnoDB */
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/* TODO list for the InnoDB handler:
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  - Ask Monty if strings of different languages can exist in the same
    database. Answer: in near future yes, but not yet.
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*/
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#ifdef __GNUC__
#pragma implementation				// gcc: Class implementation
#endif

#include "mysql_priv.h"
#ifdef HAVE_INNOBASE_DB
#include <m_ctype.h>
#include <assert.h>
#include <hash.h>
#include <myisampack.h>

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

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#include "ha_innobase.h"

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/* We must declare this here because we undef SAFE_MUTEX below */
pthread_mutex_t innobase_mutex;

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/* Store MySQL definition of 'byte': in Linux it is char while InnoDB
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uses unsigned char */
typedef byte	mysql_byte;
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#ifdef SAFE_MUTEX
#undef pthread_mutex_t
#endif
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#define INSIDE_HA_INNOBASE_CC

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/* Include necessary InnoDB headers */
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extern "C" {
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#include "../innobase/include/univ.i"
#include "../innobase/include/srv0start.h"
#include "../innobase/include/srv0srv.h"
#include "../innobase/include/trx0roll.h"
#include "../innobase/include/trx0trx.h"
#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"
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#include "../innobase/include/lock0lock.h"
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#include "../innobase/include/dict0crea.h"
#include "../innobase/include/btr0cur.h"
#include "../innobase/include/btr0btr.h"
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#include "../innobase/include/fsp0fsp.h"
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}

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

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bool 	innodb_skip 		= 0;
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uint 	innobase_init_flags 	= 0;
ulong 	innobase_cache_size 	= 0;
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long innobase_mirrored_log_groups, innobase_log_files_in_group,
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     innobase_log_file_size, innobase_log_buffer_size,
     innobase_buffer_pool_size, innobase_additional_mem_pool_size,
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     innobase_file_io_threads, innobase_lock_wait_timeout,
  innobase_thread_concurrency, innobase_force_recovery;
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char *innobase_data_home_dir, *innobase_data_file_path;
char *innobase_log_group_home_dir, *innobase_log_arch_dir;
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char *innobase_unix_file_flush_method;
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my_bool innobase_flush_log_at_trx_commit, innobase_log_archive,
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  innobase_use_native_aio, innobase_fast_shutdown;
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/* innobase_data_file_path=ibdata:15,idata2:1,... */

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/* The following counter is used to convey information to InnoDB
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about server activity: in selects it is not sensible to call
srv_active_wake_master_thread after each fetch or search, we only do
it every INNOBASE_WAKE_INTERVAL'th step. */

#define INNOBASE_WAKE_INTERVAL	32
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ulong	innobase_active_counter	= 0;
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char*	innobase_home 	= NULL;

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char    innodb_dummy_stmt_trx_handle = 'D';

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static HASH 	innobase_open_tables;
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static mysql_byte* innobase_get_key(INNOBASE_SHARE *share,uint *length,
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			      my_bool not_used __attribute__((unused)));
static INNOBASE_SHARE *get_share(const char *table_name);
static void free_share(INNOBASE_SHARE *share);
static void innobase_print_error(const char* db_errpfx, char* buffer);

/* General functions */

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/**********************************************************************
Releases possible search latch, auto inc lock, and InnoDB thread FIFO ticket.
These should be released at each SQL statement end. */
static
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->auto_inc_lock) {
		  	
		/* If we had reserved the auto-inc lock for
		some table in this SQL statement, we release it now */
		  	
		srv_conc_enter_innodb(trx);
		row_unlock_table_autoinc_for_mysql(trx);
		srv_conc_exit_innodb(trx);
	}

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

		srv_conc_force_exit_innodb(trx);
	}
}

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

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/************************************************************************
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Converts an InnoDB error code to a MySQL error code. */
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static
int
convert_error_code_to_mysql(
/*========================*/
			/* out: MySQL error code */
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	int	error)	/* in: InnoDB error code */
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{
	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) {

    		return(HA_ERR_NO_ACTIVE_RECORD);

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

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    		return(HA_ERR_LOCK_DEADLOCK);

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

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    		return(HA_ERR_LOCK_WAIT_TIMEOUT);
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 	} else if (error == (int) DB_NO_REFERENCED_ROW) {

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    		return(HA_ERR_NO_REFERENCED_ROW);
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 	} else if (error == (int) DB_ROW_IS_REFERENCED) {

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    		return(HA_ERR_ROW_IS_REFERENCED);
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 	} else if (error == (int) DB_CANNOT_ADD_CONSTRAINT) {

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    		return(HA_ERR_CANNOT_ADD_FOREIGN);
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 	} 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);
    	} else {
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    		dbug_assert(0);
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    		return(-1);			// Unknown error
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    	}
}

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extern "C" {
/*****************************************************************
Prints info of a THD object (== user session thread) to the
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standard output. NOTE that mysql/innobase/trx/trx0trx.c must contain
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the prototype for this function! */

void
innobase_mysql_print_thd(
/*=====================*/
        void* input_thd)/* in: pointer to a MySQL THD object */
{
  	THD*  thd;

  	thd = (THD*) input_thd;

  	printf("MySQL thread id %lu, query id %lu",
	 			thd->thread_id, thd->query_id);
    	if (thd->host) {
    		printf(" %s", thd->host);
  	}

  	if (thd->ip) {
    		printf(" %s", thd->ip);
  	}

  	if (thd->user) {
    		printf(" %s", thd->user);
  	}

  	if (thd->proc_info) {
    		printf(" %s", thd->proc_info);
  	}

  	if (thd->query) {
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    		printf("\n%.100s", thd->query);
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  	}  

  	printf("\n");
}
}

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/*************************************************************************
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Gets the InnoDB transaction handle for a MySQL handler object, creates
an InnoDB transaction struct if the corresponding MySQL thread struct still
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lacks one. */
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static
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trx_t*
check_trx_exists(
/*=============*/
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			/* out: InnoDB transaction handle */
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	THD*	thd)	/* in: user thread handle */
{
	trx_t*	trx;

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	trx = (trx_t*) thd->transaction.all.innobase_tid;
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	if (trx == NULL) {
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	        dbug_assert(thd != NULL);
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		trx = trx_allocate_for_mysql();
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		trx->mysql_thd = thd;

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		thd->transaction.all.innobase_tid = trx;
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		/* The execution of a single SQL statement is denoted by
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		a 'transaction' handle which is a dummy pointer: InnoDB
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		remembers internally where the latest SQL statement
		started, and if error handling requires rolling back the
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		latest statement, InnoDB does a rollback to a savepoint. */
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		thd->transaction.stmt.innobase_tid =
		                  (void*)&innodb_dummy_stmt_trx_handle;
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	} else {
		ut_a(trx->magic_n == TRX_MAGIC_N);
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	}

	return(trx);
}

/*************************************************************************
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Updates the user_thd field in a handle and also allocates a new InnoDB
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transaction handle if needed, and updates the transaction fields in the
prebuilt struct. */
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inline
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int
ha_innobase::update_thd(
/*====================*/
			/* out: 0 or error code */
	THD*	thd)	/* in: thd to use the handle */
{
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	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	trx_t*		trx;
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	trx = check_trx_exists(thd);

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	if (prebuilt->trx != trx) {
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		row_update_prebuilt_trx(prebuilt, trx);
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	}

	user_thd = thd;
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	return(0);
}

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/*************************************************************************
Reads the data files and their sizes from a character string given in
the .cnf file. */
static
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bool
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innobase_parse_data_file_paths_and_sizes(void)
/*==========================================*/
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					/* out: TRUE if ok, FALSE if parsing
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					error */
{
	char*	str;
	char*	endp;
	char*	path;
	ulint	size;
	ulint	i	= 0;

	str = innobase_data_file_path;

	/* First calculate the number of data files and check syntax:
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	path:size[M];path:size[M]... . Note that a Windows path may
	contain a drive name and a ':'. */
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	while (*str != '\0') {
		path = str;

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		while ((*str != ':' && *str != '\0')
		       || (*str == ':'
			   && (*(str + 1) == '\\' || *(str + 1) == '/'))) {
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			str++;
		}

		if (*str == '\0') {
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			return(FALSE);
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		}

		str++;
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		size = strtoul(str, &endp, 10);

		str = endp;
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		if ((*str != 'M') && (*str != 'G')) {
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			size = size / (1024 * 1024);
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		} else if (*str == 'G') {
		        size = size * 1024;
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			str++;
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		} else {
		        str++;
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		}

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	        if (strlen(str) >= 6
			   && *str == 'n'
			   && *(str + 1) == 'e' 
		           && *(str + 2) == 'w') {
		  str += 3;
		}

	        if (strlen(str) >= 3
			   && *str == 'r'
			   && *(str + 1) == 'a' 
		           && *(str + 2) == 'w') {
		  str += 3;
		}

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		if (size == 0) {
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			return(FALSE);
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		}

		i++;

		if (*str == ';') {
			str++;
		} else if (*str != '\0') {

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			return(FALSE);
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		}
	}
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	srv_data_file_names = (char**)ut_malloc(i * sizeof(void*));
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	srv_data_file_sizes = (ulint*)ut_malloc(i * sizeof(ulint));
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	srv_data_file_is_raw_partition = (ulint*)ut_malloc(i * sizeof(ulint));
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	srv_n_data_files = i;

	/* Then store the actual values to our arrays */

	str = innobase_data_file_path;
	i = 0;
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	while (*str != '\0') {
		path = str;

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		/* Note that we must ignore the ':' in a Windows path */

		while ((*str != ':' && *str != '\0')
		       || (*str == ':'
			   && (*(str + 1) == '\\' || *(str + 1) == '/'))) {
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			str++;
		}
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		if (*str == ':') {
			/* Make path a null-terminated string */
			*str = '\0';
			str++;
		}
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		size = strtoul(str, &endp, 10);

		str = endp;
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		if ((*str != 'M') && (*str != 'G')) {
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			size = size / (1024 * 1024);
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		} else if (*str == 'G') {
		        size = size * 1024;
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			str++;
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		} else {
		        str++;
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		}

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		srv_data_file_is_raw_partition[i] = 0;

	        if (strlen(str) >= 6
			   && *str == 'n'
			   && *(str + 1) == 'e' 
		           && *(str + 2) == 'w') {
		  str += 3;
		  srv_data_file_is_raw_partition[i] = SRV_NEW_RAW;
		}

	        if (strlen(str) >= 3
			   && *str == 'r'
			   && *(str + 1) == 'a' 
		           && *(str + 2) == 'w') {
		  str += 3;
		  
		  if (srv_data_file_is_raw_partition[i] == 0) {
		    srv_data_file_is_raw_partition[i] = SRV_OLD_RAW;
		  }		  
		}

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		srv_data_file_names[i] = path;
		srv_data_file_sizes[i] = size;

		i++;

		if (*str == ';') {
			str++;
		}
	}

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	return(TRUE);
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}

/*************************************************************************
Reads log group home directories from a character string given in
the .cnf file. */
static
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bool
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innobase_parse_log_group_home_dirs(void)
/*====================================*/
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					/* out: TRUE if ok, FALSE if parsing
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					error */
{
	char*	str;
	char*	path;
	ulint	i	= 0;

	str = innobase_log_group_home_dir;

	/* First calculate the number of directories and check syntax:
	path;path;... */

	while (*str != '\0') {
		path = str;

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		while (*str != ';' && *str != '\0') {
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			str++;
		}

		i++;

		if (*str == ';') {
			str++;
		} else if (*str != '\0') {

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			return(FALSE);
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		}
	}
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	if (i != (ulint) innobase_mirrored_log_groups) {

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		return(FALSE);
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	}

	srv_log_group_home_dirs = (char**) ut_malloc(i * sizeof(void*));

	/* Then store the actual values to our array */

	str = innobase_log_group_home_dir;
	i = 0;
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	while (*str != '\0') {
		path = str;

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		while (*str != ';' && *str != '\0') {
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			str++;
		}
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		if (*str == ';') {
			*str = '\0';
			str++;
		}
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		srv_log_group_home_dirs[i] = path;

		i++;
	}

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	return(TRUE);
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}

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/*************************************************************************
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Opens an InnoDB database. */
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bool
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innobase_init(void)
/*===============*/
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			/* out: TRUE if error */
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{
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	static char 	current_dir[3];
	int		err;
	bool		ret;
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  	DBUG_ENTER("innobase_init");

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

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	/* Use current_dir if no paths are set */
	current_dir[0]=FN_CURLIB;
	current_dir[1]=FN_LIBCHAR;
	current_dir[2]=0;
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	/* Set InnoDB initialization parameters according to the values
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	read from MySQL .cnf file */
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	if (!innobase_data_file_path)
	{
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	  fprintf(stderr,
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       "Cannot initialize InnoDB as 'innodb_data_file_path' is not set.\n"
       "If you do not want to use transactional InnoDB tables, add a line\n"
       "skip-innodb\n"
       "to the [mysqld] section of init parameters in your my.cnf\n"
       "or my.ini. If you want to use InnoDB tables, add for example,\n"
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       "innodb_data_file_path = ibdata1:30M\n"
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       "But to get good performance you should adjust for your hardware\n"
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       "the InnoDB startup options listed in section 2 at\n"
       "http://www.innodb.com/ibman.html\n");
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	  innodb_skip=1;
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	  DBUG_RETURN(FALSE);			// Continue without innobase
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	}

	srv_data_home = (innobase_data_home_dir ? innobase_data_home_dir :
			 current_dir);
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	srv_logs_home = (char*) "";
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	srv_arch_dir =  (innobase_log_arch_dir ? innobase_log_arch_dir :
			 current_dir);
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	ret = innobase_parse_data_file_paths_and_sizes();

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	if (ret == FALSE) {
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	  fprintf(stderr, "InnoDB: syntax error in innodb_data_file_path\n");
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	  DBUG_RETURN(TRUE);
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	}
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	if (!innobase_log_group_home_dir)
	  innobase_log_group_home_dir= current_dir;
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	ret = innobase_parse_log_group_home_dirs();

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	if (ret == FALSE) {
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	  DBUG_RETURN(TRUE);
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	}

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	srv_unix_file_flush_method_str = (innobase_unix_file_flush_method ?
				      innobase_unix_file_flush_method :
				      (char*)"fdatasync");

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	srv_n_log_groups = (ulint) innobase_mirrored_log_groups;
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	srv_n_log_files = (ulint) innobase_log_files_in_group;
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	srv_log_file_size = (ulint) innobase_log_file_size;

	srv_log_archive_on = (ulint) innobase_log_archive;
	srv_log_buffer_size = (ulint) innobase_log_buffer_size;
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	srv_flush_log_at_trx_commit = (ibool) innobase_flush_log_at_trx_commit;
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	srv_use_native_aio = 0;
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	srv_pool_size = (ulint) innobase_buffer_pool_size;
	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;

	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
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	srv_lock_wait_timeout = (ulint) innobase_lock_wait_timeout;
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	srv_thread_concurrency = (ulint) innobase_thread_concurrency;
	srv_force_recovery = (ulint) innobase_force_recovery;

	srv_fast_shutdown = (ibool) innobase_fast_shutdown;
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	if (strcmp(default_charset_info->name, "latin1") == 0) {
		/* Store the character ordering table to InnoDB.
		For non-latin1 charsets we use the MySQL comparison
		functions, and consequently we do not need to know
		the ordering internally in InnoDB. */
		
		memcpy(srv_latin1_ordering,
				default_charset_info->sort_order, 256);
	}

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	err = innobase_start_or_create_for_mysql();
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	if (err != DB_SUCCESS) {

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	  DBUG_RETURN(1);
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	}
	(void) hash_init(&innobase_open_tables,32,0,0,
			 (hash_get_key) innobase_get_key,0,0);
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	pthread_mutex_init(&innobase_mutex,MY_MUTEX_INIT_FAST);
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  	DBUG_RETURN(0);
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}

/***********************************************************************
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Closes an InnoDB database. */
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bool
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innobase_end(void)
/*==============*/
675
				/* out: TRUE if error */
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{
	int	err;

	DBUG_ENTER("innobase_end");

	err = innobase_shutdown_for_mysql();
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	hash_free(&innobase_open_tables);
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	if (err != DB_SUCCESS) {

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	  DBUG_RETURN(1);
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	}
688

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  	DBUG_RETURN(0);
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}

/********************************************************************
693
Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit
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flushes logs, and the name of this function should be innobase_checkpoint. */

696
bool
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innobase_flush_logs(void)
/*=====================*/
699
				/* out: TRUE if error */
700
{
701
  	bool 	result = 0;
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  	DBUG_ENTER("innobase_flush_logs");

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	log_flush_up_to(ut_dulint_max, LOG_WAIT_ONE_GROUP);
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  	DBUG_RETURN(result);
}

710
/*************************************************************************
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Gets the free space in an InnoDB database: returned in units of kB. */
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uint
innobase_get_free_space(void)
/*=========================*/
			/* out: free space in kB */
{
	return((uint) fsp_get_available_space_in_free_extents(0));
}

721
/*********************************************************************
722
Commits a transaction in an InnoDB database. */
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int
innobase_commit(
/*============*/
			/* out: 0 or error number */
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	THD*	thd,	/* in: MySQL thread handle of the user for whom
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			the transaction should be committed */
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	void*	trx_handle)/* in: InnoDB trx handle or NULL: NULL means
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			that the current SQL statement ended, and we should
			mark the start of a new statement with a savepoint */
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{
	int	error	= 0;
735
	trx_t*	trx;
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  	DBUG_ENTER("innobase_commit");
  	DBUG_PRINT("trans", ("ending transaction"));

740
	trx = check_trx_exists(thd);
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742
	if (trx_handle != (void*)&innodb_dummy_stmt_trx_handle) {
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		trx_commit_for_mysql(trx);
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	}
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	/* Release possible statement level resources */
	innobase_release_stat_resources(trx);
	
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	trx_mark_sql_stat_end(trx);

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#ifndef DBUG_OFF
	if (error) {
    		DBUG_PRINT("error", ("error: %d", error));
    	}
#endif
757
	/* Tell InnoDB server that there might be work for
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	utility threads: */

	srv_active_wake_master_thread();

	DBUG_RETURN(error);
}

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

int
innobase_report_binlog_offset_and_commit(
/*=====================================*/
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                                /* out: 0 or error code */
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        THD*    thd,            /* in: user thread */
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        void*   trx_handle,     /* in: InnoDB trx handle */
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        char*   log_file_name,  /* in: latest binlog file name */
        my_off_t end_offset)    /* in: the offset in the binlog file
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                                   up to which we wrote */
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{
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	trx_t*	trx;

	trx = (trx_t*)trx_handle;
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	trx->mysql_log_file_name = log_file_name;  	
	trx->mysql_log_offset = (ib_longlong)end_offset;
	
  	return(innobase_commit(thd, trx_handle));
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}

791
/*********************************************************************
792
Rolls back a transaction in an InnoDB database. */
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int
innobase_rollback(
/*==============*/
			/* out: 0 or error number */
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	THD*	thd,	/* in: handle to the MySQL thread of the user
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			whose transaction should be rolled back */
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	void*	trx_handle)/* in: InnoDB trx handle or a dummy stmt handle */
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{
	int	error = 0;
803
	trx_t*	trx;
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	DBUG_ENTER("innobase_rollback");
	DBUG_PRINT("trans", ("aborting transaction"));

808
	trx = check_trx_exists(thd);
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	srv_conc_enter_innodb(trx);

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	if (trx_handle != (void*)&innodb_dummy_stmt_trx_handle) {
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		error = trx_rollback_for_mysql(trx);
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	} else {
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		error = trx_rollback_last_sql_stat_for_mysql(trx);
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	}
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	srv_conc_exit_innodb(trx);

	/* Release possible statement level resources */
	innobase_release_stat_resources(trx);

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	trx_mark_sql_stat_end(trx);

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	DBUG_RETURN(convert_error_code_to_mysql(error));
}

/*********************************************************************
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Frees a possible InnoDB trx object associated with the current
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THD. */

int
innobase_close_connection(
/*======================*/
			/* out: 0 or error number */
	THD*	thd)	/* in: handle to the MySQL thread of the user
			whose transaction should be rolled back */
{
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	if (NULL != thd->transaction.all.innobase_tid) {
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	        trx_rollback_for_mysql((trx_t*)
				(thd->transaction.all.innobase_tid));
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		trx_free_for_mysql((trx_t*)
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				(thd->transaction.all.innobase_tid));
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	}

	return(0);
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}
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/**********************************************************************
Prints an error message. */
static
void
innobase_print_error(
/*=================*/
	const char*	db_errpfx,	/* in: error prefix text */
	char*		buffer)		/* in: error text */
{
  	sql_print_error("%s:  %s", db_errpfx, buffer);
}


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

/********************************************************************
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This function is not relevant since we store the tables and indexes
into our own tablespace, not as files, whose extension this function would
give. */
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const char**
ha_innobase::bas_ext() const
/*========================*/
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				/* out: file extension strings, currently not
				used */
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{
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	static const char* ext[] = {".InnoDB", NullS};
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	return(ext);
}

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/*********************************************************************
Normalizes a table name string. A normalized name consists of the
database name catenated to '/' and table name. An example:
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test/mytable. On Windows normalization puts both the database name and the
table name always to lower case. */
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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 */

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	ptr = strend(name)-1;
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	while (ptr >= name && *ptr != '\\' && *ptr != '/') {
		ptr--;
	}

	name_ptr = ptr + 1;

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	dbug_assert(ptr > name);
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	ptr--;
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	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] = '/';
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#ifdef __WIN__
	/* Put to lower case */

	ptr = norm_name;

	while (*ptr != '\0') {
	        *ptr = tolower(*ptr);
	        ptr++;
	}
#endif
934
}
935

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/*********************************************************************
Creates and opens a handle to a table which already exists in an Innnobase
database. */

int
ha_innobase::open(
/*==============*/
					/* out: 1 if error, 0 if success */
	const char*	name,		/* in: table name */
	int 		mode,		/* in: not used */
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	uint 		test_if_locked)	/* in: not used */
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{
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	dict_table_t*	ib_table;
  	int 		error	= 0;
  	uint		buff_len;
  	char		norm_name[1000];
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	DBUG_ENTER("ha_innobase::open");

	UT_NOT_USED(mode);
	UT_NOT_USED(test_if_locked);

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	normalize_table_name(norm_name, name);

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	user_thd = NULL;

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	last_query_id = (ulong)-1;

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	if (!(share=get_share(name)))
	  DBUG_RETURN(1);

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	/* 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. */
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	buff_len = table->reclength + table->max_key_length
973
							+ MAX_REF_PARTS * 3;
974
	if (!(mysql_byte*) my_multi_malloc(MYF(MY_WME),
975 976
				     &upd_buff, buff_len,
				     &key_val_buff, buff_len,
977
				     NullS)) {
978
	  	free_share(share);
979
	  	DBUG_RETURN(1);
980 981
  	}

982
	/* Get pointer to a table object in InnoDB dictionary cache */
983

984 985 986 987
	ib_table = dict_table_get_and_increment_handle_count(
				      		     norm_name, NULL);

 	if (NULL == ib_table) {
988

989
	  fprintf(stderr,
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"InnoDB: Error: cannot find table %s from the internal data dictionary\n"
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"InnoDB: of InnoDB though the .frm file for the table exists. Maybe you\n"
"InnoDB: have deleted and recreated InnoDB data files but have forgotten\n"
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"InnoDB: to delete the corresponding .frm files of InnoDB tables, or you\n"
"InnoDB: have moved .frm files to another database?\n",
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		  norm_name);

997
	        free_share(share);
998
    		my_free((char*) upd_buff, MYF(0));
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    		my_errno = ENOENT;
    		DBUG_RETURN(1);
  	}

1003
	innobase_prebuilt = row_create_prebuilt(ib_table);
1004

1005
	((row_prebuilt_t*)innobase_prebuilt)->mysql_row_len = table->reclength;
1006

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  	primary_key = MAX_KEY;

  	if (!row_table_got_default_clust_index(ib_table)) {
1010 1011 1012 1013 1014 1015

		/* If we automatically created the clustered index,
		then MySQL does not know about it and it must not be aware
		of the index used on scan, to avoid checking if we update
		the column of the index. The column is the row id in
		the automatical case, and it will not be updated. */
1016 1017 1018 1019

		((row_prebuilt_t*)innobase_prebuilt)
				->clust_index_was_generated = FALSE;

1020
		primary_key = 0;
1021
		key_used_on_scan = 0;
1022 1023 1024 1025 1026 1027 1028 1029

 		/* MySQL allocates the buffer for ref */

  		ref_length = table->key_info->key_length
  				+ table->key_info->key_parts + 10;

  		/* One byte per key field is consumed to the SQL NULL
		info of the field; we add also 10 bytes of safety margin */
1030
	} else {
1031 1032 1033
		((row_prebuilt_t*)innobase_prebuilt)
				->clust_index_was_generated = TRUE;

1034 1035
  		ref_length = DATA_ROW_ID_LEN + 10;
				
1036
		dbug_assert(key_used_on_scan == MAX_KEY);
1037
	}
1038

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	auto_inc_counter_for_this_stat = 0;

	/* Init table lock structure */
1042
	thr_lock_data_init(&share->lock,&lock,(void*) 0);
1043 1044

  	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
1045

1046 1047 1048 1049 1050 1051 1052 1053 1054 1055
  	DBUG_RETURN(0);
}

/*********************************************************************
Does nothing. */

void
ha_innobase::initialize(void)
/*=========================*/
{
1056
}
1057 1058

/**********************************************************************
1059
Closes a handle to an InnoDB table. */
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069

int
ha_innobase::close(void)
/*====================*/
				/* out: error number */
{
  	DBUG_ENTER("ha_innobase::close");

	row_prebuilt_free((row_prebuilt_t*) innobase_prebuilt);

1070
    	my_free((char*) upd_buff, MYF(0));
1071 1072
        free_share(share);

1073
	/* Tell InnoDB server that there might be work for
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
	utility threads: */

	srv_active_wake_master_thread();

  	DBUG_RETURN(0);
}

/* 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 */
1090
	TABLE*	table,	/* in: MySQL table object */
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
	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 */
1104
	TABLE*	table,	/* in: MySQL table object */
1105 1106 1107 1108 1109 1110 1111 1112 1113
	Field*	field,	/* in: MySQL field object */
	char*	record)	/* in: a row in MySQL format */
{
	int	null_offset;

	if (!field->null_ptr) {

		return(0);
	}
1114

1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
	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(
/*========================*/
1133
	TABLE*	table,	/* in: MySQL table object */
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150
	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;
}

/******************************************************************
Resets SQL NULL bits in a record to zero. */
inline
void
reset_null_bits(
/*============*/
1151
	TABLE*	table,	/* in: MySQL table object */
1152 1153 1154 1155 1156 1157 1158
	char*	record)	/* in: a row in MySQL format */
{
	bzero(record, table->null_bytes);
}

extern "C" {
/*****************************************************************
1159
InnoDB uses this function is to compare two data fields for which the
1160
data type is such that we must use MySQL code to compare them. NOTE that the
1161
prototype of this function is in rem0cmp.c in InnoDB source code!
1162
If you change this function, remember to update the prototype there! */
1163 1164 1165

int
innobase_mysql_cmp(
1166
/*===============*/
1167 1168
					/* out: 1, 0, -1, if a is greater,
					equal, less than b, respectively */
1169
	int		mysql_type,	/* in: MySQL type */
1170 1171 1172 1173 1174 1175 1176 1177
	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 */
{
	enum_field_types	mysql_tp;
1178
	int                     ret;
1179

1180 1181
	dbug_assert(a_length != UNIV_SQL_NULL);
	dbug_assert(b_length != UNIV_SQL_NULL);
1182 1183 1184 1185 1186 1187 1188

	mysql_tp = (enum_field_types) mysql_type;

	switch (mysql_tp) {

	case FIELD_TYPE_STRING:
	case FIELD_TYPE_VAR_STRING:
1189 1190 1191 1192 1193 1194 1195 1196 1197
  		ret = my_sortncmp((const char*) a, a_length,
				  (const char*) b, b_length);
		if (ret < 0) {
		  return(-1);
		} else if (ret > 0) {
		  return(1);
		} else {
		  return(0);
	        }
1198 1199 1200 1201 1202 1203 1204 1205 1206
	default:
		assert(0);
	}

	return(0);
}
}

/******************************************************************
1207
Converts a MySQL type to an InnoDB type. */
1208 1209
inline
ulint
1210 1211 1212
get_innobase_type_from_mysql_type(
/*==============================*/
			/* out: DATA_BINARY, DATA_VARCHAR, ... */
1213 1214 1215
	Field*	field)	/* in: MySQL field */
{
	/* The following asserts check that MySQL type code fits in
1216 1217
	8 bits: this is used in ibuf and also when DATA_NOT_NULL is
	ORed to the type */
1218

1219 1220 1221 1222 1223
	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);
1224 1225

	switch (field->type()) {
1226
		case FIELD_TYPE_VAR_STRING: if (field->flags & BINARY_FLAG) {
1227 1228 1229 1230 1231 1232

						return(DATA_BINARY);
					} else if (strcmp(
						   default_charset_info->name,
							"latin1") == 0) {
						return(DATA_VARCHAR);
1233 1234
					} else {
						return(DATA_VARMYSQL);
1235
					}
1236 1237 1238 1239 1240 1241 1242
		case FIELD_TYPE_STRING: if (field->flags & BINARY_FLAG) {

						return(DATA_FIXBINARY);
					} else if (strcmp(
						   default_charset_info->name,
							"latin1") == 0) {
						return(DATA_CHAR);
1243 1244
					} else {
						return(DATA_MYSQL);
1245
					}
1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256
		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:
		case FIELD_TYPE_ENUM:
		case FIELD_TYPE_SET:
1257 1258 1259
		case FIELD_TYPE_TIME:
		case FIELD_TYPE_TIMESTAMP:
					return(DATA_INT);
1260
		case FIELD_TYPE_FLOAT:
1261
					return(DATA_FLOAT);
1262
		case FIELD_TYPE_DOUBLE:
1263
					return(DATA_DOUBLE);
1264
		case FIELD_TYPE_DECIMAL:
1265 1266 1267 1268 1269 1270
					return(DATA_DECIMAL);
		case FIELD_TYPE_TINY_BLOB:
		case FIELD_TYPE_MEDIUM_BLOB:
		case FIELD_TYPE_BLOB:
		case FIELD_TYPE_LONG_BLOB:
					return(DATA_BLOB);
1271 1272 1273 1274 1275 1276
		default:
					assert(0);
	}

	return(0);
}
1277

1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
/***********************************************************************
Stores a key value for a row to a buffer. */

uint
ha_innobase::store_key_val_for_row(
/*===============================*/
				/* out: key value length as stored in buff */
	uint 		keynr,	/* in: key number */
	char*		buff,	/* in/out: buffer for the key value (in MySQL
				format) */
1288
	const mysql_byte* record)/* in: row in MySQL format */
1289 1290 1291 1292 1293
{
	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;
1294

1295 1296 1297 1298 1299 1300 1301 1302 1303
  	DBUG_ENTER("store_key_val_for_row");

  	for (; key_part != end; key_part++) {

    		if (key_part->null_bit) {
      			/* Store 0 if the key part is a NULL part */

      			if (record[key_part->null_offset]
						& key_part->null_bit) {
1304
				*buff++ = 1;
1305 1306 1307
				continue;
      			}

1308
      			*buff++ = 0;
1309
    		}
1310

1311 1312 1313 1314 1315 1316 1317 1318
		memcpy(buff, record + key_part->offset, key_part->length);
		buff += key_part->length;
  	}

	DBUG_RETURN(buff - buff_start);
}

/******************************************************************
1319
Builds a template to the prebuilt struct. */
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1320
static
1321
void
1322 1323 1324 1325 1326 1327 1328 1329 1330
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 */
1331
{
1332 1333
	dict_index_t*	index;
	dict_index_t*	clust_index;
1334
	mysql_row_templ_t* templ;
1335
	Field*		field;
1336 1337
	ulint		n_fields;
	ulint		n_requested_fields	= 0;
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1338
	ibool		fetch_all_in_key	= FALSE;
1339
	ulint		i;
1340

1341
	clust_index = dict_table_get_first_index_noninline(prebuilt->table);
1342

1343
	if (!prebuilt->in_update_remember_pos) {
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1344 1345 1346 1347 1348 1349 1350 1351
		if (prebuilt->read_just_key) {
			fetch_all_in_key = TRUE;
		} else {
			/* We are building a temporary table: fetch all
			columns */
		
			templ_type = ROW_MYSQL_WHOLE_ROW;
		}
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	}

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	if (prebuilt->select_lock_type == LOCK_X) {
	  /* TODO: should fix the code in sql_update so that we could do
	     with fetching only the needed columns */

	        templ_type = ROW_MYSQL_WHOLE_ROW;
	}

1361
	if (templ_type == ROW_MYSQL_REC_FIELDS) {
1362

1363 1364 1365 1366
		if (prebuilt->select_lock_type != LOCK_NONE) {
			/* Let index be the clustered index */

			index = clust_index;
1367
		} else {
1368
			index = prebuilt->index;
1369
		}
1370 1371
	} else {
		index = clust_index;
1372
	}
1373

1374 1375 1376 1377 1378 1379 1380
	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 */
	}
1381

1382 1383 1384 1385 1386 1387 1388
	n_fields = (ulint)table->fields;

	if (!prebuilt->mysql_template) {
		prebuilt->mysql_template = (mysql_row_templ_t*)
						mem_alloc_noninline(
					n_fields * sizeof(mysql_row_templ_t));
	}
1389

1390 1391
	prebuilt->template_type = templ_type;
	prebuilt->null_bitmap_len = table->null_bytes;
1392

1393 1394
	prebuilt->templ_contains_blob = FALSE;

1395
	for (i = 0; i < n_fields; i++) {
1396
		templ = prebuilt->mysql_template + n_requested_fields;
1397 1398
		field = table->field[i];

1399
		if (templ_type == ROW_MYSQL_REC_FIELDS
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			&& !(fetch_all_in_key &&
				ULINT_UNDEFINED != dict_index_get_nth_col_pos(
								index, i))
1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
			&& thd->query_id != field->query_id
			&& thd->query_id != (field->query_id ^ MAX_ULONG_BIT)
			&& thd->query_id !=
				(field->query_id ^ (MAX_ULONG_BIT >> 1))) {

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

			goto skip_field;
		}

		n_requested_fields++;
1414

1415
		templ->col_no = i;
1416

1417 1418 1419
		if (index == clust_index) {
			templ->rec_field_no = (index->table->cols + i)
								->clust_pos;
1420
		} else {
1421 1422
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
1423 1424
		}

1425 1426 1427 1428 1429 1430 1431 1432
		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]);
1433

1434 1435 1436 1437
			templ->mysql_null_bit_mask = (ulint) field->null_bit;
		} else {
			templ->mysql_null_bit_mask = 0;
		}
1438

1439 1440
		templ->mysql_col_offset = (ulint)
					get_field_offset(table, field);
1441

1442 1443 1444
		templ->mysql_col_len = (ulint) field->pack_length();
		templ->type = get_innobase_type_from_mysql_type(field);
		templ->is_unsigned = (ulint) (field->flags & UNSIGNED_FLAG);
1445

1446 1447
		if (templ->type == DATA_BLOB) {
			prebuilt->templ_contains_blob = TRUE;
1448
		}
1449 1450 1451
skip_field:
		;
	}
1452

1453
	prebuilt->n_template = n_requested_fields;
1454

1455 1456 1457 1458 1459
	if (prebuilt->need_to_access_clustered) {
		/* Change rec_field_no's to correspond to the clustered index
		record */
		for (i = 0; i < n_requested_fields; i++) {
			templ = prebuilt->mysql_template + i;
1460

1461 1462 1463
			templ->rec_field_no =
			    (index->table->cols + templ->col_no)->clust_pos;
		}
1464
	}
1465

1466 1467 1468 1469 1470
	if (templ_type == ROW_MYSQL_REC_FIELDS
				&& prebuilt->select_lock_type != LOCK_NONE) {

		prebuilt->need_to_access_clustered = TRUE;
	}
1471 1472 1473
}

/************************************************************************
1474
Stores a row in an InnoDB database, to the table specified in this
1475 1476 1477 1478 1479
handle. */

int
ha_innobase::write_row(
/*===================*/
1480 1481
				/* out: error code */
	mysql_byte* 	record)	/* in: a row in MySQL format */
1482
{
1483
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
1484
  	int 		error;
1485 1486
	longlong	auto_inc;
	
1487
  	DBUG_ENTER("ha_innobase::write_row");
1488 1489 1490 1491 1492 1493

  	statistic_increment(ha_write_count, &LOCK_status);

  	if (table->time_stamp) {
    		update_timestamp(record + table->time_stamp - 1);
    	}
1494

1495 1496 1497
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
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		innobase_release_stat_resources(prebuilt->trx);
1500 1501
	}

1502
  	if (table->next_number_field && record == table->record[0]) {
1503

1504 1505 1506 1507
	        /* Fetch the value the user possibly has set in the
	        autoincrement field */
	        
	        auto_inc = table->next_number_field->val_int();
1508 1509 1510 1511

		/* In replication and also otherwise the auto-inc column 
		can be set with SET INSERT_ID. Then we must look at
		user_thd->next_insert_id. If it is nonzero and the user
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1512 1513 1514
		has not supplied a value, we must use it, and use values
		incremented by 1 in all subsequent inserts within the
		same SQL statement! */
1515 1516 1517

		if (auto_inc == 0 && user_thd->next_insert_id != 0) {
		        auto_inc = user_thd->next_insert_id;
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		        auto_inc_counter_for_this_stat = auto_inc;
1519
		}
1520

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		if (auto_inc == 0 && auto_inc_counter_for_this_stat) {
			/* The user set the auto-inc counter for
			this SQL statement with SET INSERT_ID. We must
			assign sequential values from the counter. */

			auto_inc_counter_for_this_stat++;

			auto_inc = auto_inc_counter_for_this_stat;

			/* We give MySQL a new value to place in the
			auto-inc column */
			user_thd->next_insert_id = auto_inc;
		}
		
1535 1536 1537 1538 1539
		if (auto_inc != 0) {
			/* This call will calculate the max of the
			current value and the value supplied by the user, if
			the auto_inc counter is already initialized
			for the table */
1540 1541 1542 1543 1544 1545 1546 1547

			/* 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. */

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			srv_conc_enter_innodb(prebuilt->trx);
1549
			error = row_lock_table_autoinc_for_mysql(prebuilt);
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			srv_conc_exit_innodb(prebuilt->trx);
1551 1552 1553 1554 1555 1556 1557

			if (error != DB_SUCCESS) {
			
				error = convert_error_code_to_mysql(error);
				goto func_exit;
			}	
			
1558 1559
			dict_table_autoinc_update(prebuilt->table, auto_inc);
		} else {
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			srv_conc_enter_innodb(prebuilt->trx);

1562 1563 1564 1565 1566
			if (!prebuilt->trx->auto_inc_lock) {

				error = row_lock_table_autoinc_for_mysql(
								prebuilt);
				if (error != DB_SUCCESS) {
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					srv_conc_exit_innodb(prebuilt->trx);
1568 1569 1570 1571 1572 1573 1574
			
					error = convert_error_code_to_mysql(
								error);
					goto func_exit;
				}
			}	

1575
			auto_inc = dict_table_autoinc_get(prebuilt->table);
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			srv_conc_exit_innodb(prebuilt->trx);
1577

1578 1579 1580 1581 1582 1583 1584 1585 1586
			/* If auto_inc is now != 0 the autoinc counter
			was already initialized for the table: we can give
			the new value for MySQL to place in the field */

			if (auto_inc != 0) {
				user_thd->next_insert_id = auto_inc;
			}
		}
	        
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	        /* Set the 'in_update_remember_pos' flag to FALSE to
	        make sure all columns are fetched in the select done by
	        update_auto_increment */

1591 1592
	        prebuilt->in_update_remember_pos = FALSE;
	        
1593
    		update_auto_increment();
1594

1595 1596 1597 1598 1599 1600
		if (auto_inc == 0) {
			/* The autoinc counter for our table was not yet
			initialized, initialize it now */

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

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			srv_conc_enter_innodb(prebuilt->trx);
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			error = row_lock_table_autoinc_for_mysql(prebuilt);
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			srv_conc_exit_innodb(prebuilt->trx);
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1604 1605 1606 1607 1608 1609 1610

			if (error != DB_SUCCESS) {
			
				error = convert_error_code_to_mysql(error);
				goto func_exit;
			}	
			
1611 1612 1613 1614
			dict_table_autoinc_initialize(prebuilt->table,
								auto_inc);
		}
    		
1615 1616 1617 1618 1619 1620 1621
		/* We have to set sql_stat_start to TRUE because
		update_auto_increment 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;
1622
    	}
1623

1624 1625 1626 1627
	if (prebuilt->mysql_template == NULL
			|| prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) {
		/* Build the template used in converting quickly between
		the two database formats */
1628

1629 1630
		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
	}
1631

1632 1633 1634 1635 1636 1637 1638
	if (user_thd->lex.sql_command == SQLCOM_INSERT
	    && user_thd->lex.duplicates == DUP_IGNORE) {
	        prebuilt->trx->ignore_duplicates_in_insert = TRUE;
        } else {
	        prebuilt->trx->ignore_duplicates_in_insert = FALSE;
	}

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	srv_conc_enter_innodb(prebuilt->trx);

1641
	error = row_insert_for_mysql((byte*) record, prebuilt);
1642

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1643
	srv_conc_exit_innodb(prebuilt->trx);
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1644

1645 1646
	prebuilt->trx->ignore_duplicates_in_insert = FALSE;

1647
	error = convert_error_code_to_mysql(error);
1648

1649
	/* Tell InnoDB server that there might be work for
1650
	utility threads: */
1651
func_exit:
1652
	innobase_active_small();
1653 1654 1655 1656

  	DBUG_RETURN(error);
}

1657
/******************************************************************
1658
Converts field data for storage in an InnoDB update vector. */
1659 1660 1661 1662 1663 1664 1665 1666 1667 1668
inline
mysql_byte*
innobase_convert_and_store_changed_col(
/*===================================*/
				/* out: pointer to the end of the converted
				data in the buffer */
	upd_field_t*	ufield,	/* in/out: field in the update vector */
	mysql_byte*	buf,	/* in: buffer we can use in conversion */
	mysql_byte*	data,	/* in: column data to store */
	ulint		len,	/* in: data len */
1669
	ulint		col_type,/* in: data type in InnoDB type numbers */
1670
	ulint		is_unsigned)/* in: != 0 if an unsigned integer type */
1671
{
1672 1673 1674 1675
	uint	i;

	if (len == UNIV_SQL_NULL) {
		data = NULL;
1676 1677
	} else if (col_type == DATA_VARCHAR || col_type == DATA_BINARY
		   || col_type == DATA_VARMYSQL) {
1678 1679 1680 1681 1682
	        /* Remove trailing spaces */
        	while (len > 0 && data[len - 1] == ' ') {
	                len--;
	        }

1683
	} else if (col_type == DATA_INT) {
1684
		/* Store integer data in InnoDB in a big-endian
1685
		format, sign bit negated, if signed */
1686

1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697
		for (i = 0; i < len; i++) {
			buf[len - 1 - i] = data[i];
		}

		if (!is_unsigned) {
			buf[0] = buf[0] ^ 128;
		}

		data = buf;

		buf += len;
1698
	}
1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718

	ufield->new_val.data = data;
	ufield->new_val.len = len;

	return(buf);
}

/**************************************************************************
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 */
	struct st_table* table,		/* in: table in MySQL data dictionary */
	mysql_byte*	upd_buff,	/* in: buffer to use */
1719
	row_prebuilt_t*	prebuilt,	/* in: InnoDB prebuilt struct */
1720 1721 1722
	THD*		thd)		/* in: user thread */
{
	Field*		field;
1723 1724 1725
	uint		n_fields;
	ulint		o_len;
	ulint		n_len;
1726 1727 1728
	byte*	        o_ptr;
        byte*	        n_ptr;
        byte*	        buf;
1729
	upd_field_t*	ufield;
1730 1731
	ulint		col_type;
	ulint		is_unsigned;
1732
	ulint		n_changed = 0;
1733
	uint		i;
1734 1735 1736

	n_fields = table->fields;

1737
	/* We use upd_buff to convert changed fields */
1738
	buf = (byte*) upd_buff;
1739

1740 1741 1742
	for (i = 0; i < n_fields; i++) {
		field = table->field[i];

1743
		/* if (thd->query_id != field->query_id) { */
1744 1745
			/* TODO: check that these fields cannot have
			changed! */
1746

1747 1748
		/*	goto skip_field;
		}*/
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1750 1751
		o_ptr = (byte*) old_row + get_field_offset(table, field);
		n_ptr = (byte*) new_row + get_field_offset(table, field);
1752 1753 1754
		o_len = field->pack_length();
		n_len = field->pack_length();

1755
		col_type = get_innobase_type_from_mysql_type(field);
1756
		is_unsigned = (ulint) (field->flags & UNSIGNED_FLAG);
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		switch (col_type) {

		case DATA_BLOB:
			o_ptr = row_mysql_read_blob_ref(&o_len, o_ptr, o_len);
			n_ptr = row_mysql_read_blob_ref(&n_len, n_ptr, n_len);
			break;
		case DATA_VARCHAR:
		case DATA_BINARY:
		case DATA_VARMYSQL:
			o_ptr = row_mysql_read_var_ref_noninline(&o_len, o_ptr);
			n_ptr = row_mysql_read_var_ref_noninline(&n_len, n_ptr);
		default:
			;
		}
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		if (field->null_ptr) {
			if (field_in_record_is_null(table, field,
							(char*) old_row)) {
				o_len = UNIV_SQL_NULL;
			}
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			if (field_in_record_is_null(table, field,
							(char*) new_row)) {
				n_len = UNIV_SQL_NULL;
			}
		}

		if (o_len != n_len || (o_len != UNIV_SQL_NULL &&
					0 != memcmp(o_ptr, n_ptr, o_len))) {
			/* The field has changed */

			ufield = uvect->fields + n_changed;

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			buf = (byte*)
                          innobase_convert_and_store_changed_col(ufield,
					  (mysql_byte*)buf,
					  (mysql_byte*)n_ptr, n_len, col_type,
1795
						is_unsigned);
1796
			ufield->exp = NULL;
1797 1798
			ufield->field_no =
					(prebuilt->table->cols + i)->clust_pos;
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			n_changed++;
		}
1801
		;
1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813
	}

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

	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.
1814
TODO: currently InnoDB does not prevent the 'Halloween problem':
1815 1816
in a searched update a single row can get updated several times
if its index columns are updated! */
1817

1818 1819 1820 1821
int
ha_innobase::update_row(
/*====================*/
					/* out: error number or 0 */
1822 1823
	const mysql_byte* 	old_row,/* in: old row in MySQL format */
	mysql_byte* 		new_row)/* in: new row in MySQL format */
1824 1825 1826 1827 1828
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	upd_t*		uvect;
	int		error = 0;

1829
	DBUG_ENTER("ha_innobase::update_row");
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1831 1832 1833 1834
        if (table->time_stamp) {
                update_timestamp(new_row + table->time_stamp - 1);
	}

1835 1836 1837
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
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		innobase_release_stat_resources(prebuilt->trx);
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	}

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	if (prebuilt->upd_node) {
		uvect = prebuilt->upd_node->update;
	} else {
		uvect = row_get_prebuilt_update_vector(prebuilt);
	}
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	/* Build an update vector from the modified fields in the rows
	(uses upd_buff of the handle) */

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	calc_row_difference(uvect, (mysql_byte*) old_row, new_row, table,
						upd_buff, prebuilt, user_thd);
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	/* This is not a delete */
	prebuilt->upd_node->is_delete = FALSE;

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	if (!prebuilt->in_update_remember_pos) {
		assert(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);
	}

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	srv_conc_enter_innodb(prebuilt->trx);

1862
	error = row_update_for_mysql((byte*) old_row, prebuilt);
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	srv_conc_exit_innodb(prebuilt->trx);
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1866 1867
	error = convert_error_code_to_mysql(error);

1868
	/* Tell InnoDB server that there might be work for
1869 1870
	utility threads: */

1871
	innobase_active_small();
1872 1873 1874 1875 1876 1877 1878 1879 1880 1881

	DBUG_RETURN(error);
}

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

int
ha_innobase::delete_row(
/*====================*/
1882 1883
					/* out: error number or 0 */
	const mysql_byte* record)	/* in: a row in MySQL format */
1884 1885 1886 1887
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error = 0;

1888
	DBUG_ENTER("ha_innobase::delete_row");
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1890 1891 1892
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
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1893 1894

		innobase_release_stat_resources(prebuilt->trx);
1895 1896
	}

1897 1898 1899
	if (!prebuilt->upd_node) {
		row_get_prebuilt_update_vector(prebuilt);
	}
1900 1901

	/* This is a delete */
1902

1903
	prebuilt->upd_node->is_delete = TRUE;
1904
	prebuilt->in_update_remember_pos = TRUE;
1905

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	srv_conc_enter_innodb(prebuilt->trx);

1908
	error = row_update_for_mysql((byte*) record, prebuilt);
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	srv_conc_exit_innodb(prebuilt->trx);
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1912 1913
	error = convert_error_code_to_mysql(error);

1914
	/* Tell the InnoDB server that there might be work for
1915 1916
	utility threads: */

1917
	innobase_active_small();
1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933

	DBUG_RETURN(error);
}

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

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	error = change_active_index(keynr);
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  	DBUG_RETURN(error);
}

/**********************************************************************
1940
Currently does nothing. */
1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953

int
ha_innobase::index_end(void)
/*========================*/
{
	int 	error	= 0;
  	DBUG_ENTER("index_end");

  	DBUG_RETURN(error);
}

/*************************************************************************
Converts a search mode flag understood by MySQL to a flag understood
1954
by InnoDB. */
1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977
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);
		case HA_READ_PREFIX_LAST:	return(PAGE_CUR_LE);
			/* the above PREFIX flags mean that the last
			field in the key value may just be a prefix
			of the complete fixed length field */
		default:			assert(0);
	}

	return(0);
}
1978

1979 1980 1981 1982 1983 1984 1985 1986 1987
/**************************************************************************
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 */
1988
	mysql_byte*		buf,	/* in/out: buffer for the returned
1989
					row */
1990
	const mysql_byte* 	key_ptr,/* in: key value; if this is NULL
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					we position the cursor at the
					start or end of index */
1993
	uint			key_len,/* in: key value length */
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
	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");
  	statistic_increment(ha_read_key_count, &LOCK_status);
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2006 2007 2008
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
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		innobase_release_stat_resources(prebuilt->trx);
2011 2012
	}

2013
	index = prebuilt->index;
2014

2015 2016 2017 2018
	/* Note that if the select is used for an update, we always
	fetch the clustered index record: therefore the index for which the
	template is built is not necessarily prebuilt->index, but can also
	be the clustered index */
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2020 2021 2022 2023
	if (prebuilt->sql_stat_start) {
		build_template(prebuilt, user_thd, table,
							ROW_MYSQL_REC_FIELDS);
	}
2024 2025

	if (key_ptr) {
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		row_sel_convert_mysql_key_to_innobase(prebuilt->search_tuple,
							(byte*) key_val_buff,
							index,
							(byte*) key_ptr,
							(ulint) key_len);
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	} else {
		/* We position the cursor to the last or the first entry
		in the index */

 		dtuple_set_n_fields(prebuilt->search_tuple, 0);
	}
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2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051
	mode = convert_search_mode_to_innobase(find_flag);

	match_mode = 0;

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

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

	last_match_mode = match_mode;

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	srv_conc_enter_innodb(prebuilt->trx);

2054
	ret = row_search_for_mysql((byte*) buf, mode, prebuilt, match_mode, 0);
2055

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

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

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

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

int
ha_innobase::change_active_index(
/*=============================*/
2083 2084 2085
			/* out: 0 or error code */
	uint 	keynr)	/* in: use this index; MAX_KEY means always clustered
			index, even if it was internally generated by
2086
			InnoDB */
2087 2088 2089 2090 2091 2092
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	KEY*		key;

  	statistic_increment(ha_read_key_count, &LOCK_status);

2093
  	DBUG_ENTER("index_read_idx");
2094

2095 2096
	active_index = keynr;

2097
	if (keynr != MAX_KEY && table->keys > 0) {
2098
		key = table->key_info + active_index;
2099

2100
		prebuilt->index = dict_table_get_index_noninline(
2101
						prebuilt->table, key->name);
2102 2103
	} else {
		prebuilt->index = dict_table_get_first_index_noninline(
2104
							prebuilt->table);
2105 2106
	}

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	if (!prebuilt->index) {
		fprintf(stderr,
	"InnoDB: Could not find key n:o %u with name %s from dict cache\n"
	"InnoDB: for table %s\n", keynr, key->name, prebuilt->table->name);

		return(1);
	}
	
	assert(prebuilt->search_tuple);

2117
	dtuple_set_n_fields(prebuilt->search_tuple, prebuilt->index->n_fields);
2118

2119 2120 2121 2122 2123 2124
 	dict_index_copy_types(prebuilt->search_tuple, prebuilt->index,
						prebuilt->index->n_fields);

	/* Maybe MySQL changes the active index for a handle also
	during some queries, we do not know: then it is safest to build
	the template such that all columns will be fetched */
2125

2126 2127
	build_template(prebuilt, user_thd, table, ROW_MYSQL_WHOLE_ROW);

2128
	return(0);
2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139
}

/**************************************************************************
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 */
2140
	mysql_byte*	buf,		/* in/out: buffer for the returned
2141 2142
					row */
	uint 		keynr,		/* in: use this index */
2143
	const mysql_byte* key,		/* in: key value; if this is NULL
2144 2145 2146 2147 2148
					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 */
{
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	if (change_active_index(keynr)) {

		return(1);
	}
2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165

	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 */
2166
	mysql_byte* 	buf,	/* in/out: buffer for next row in MySQL
2167 2168 2169 2170 2171 2172 2173 2174
				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;
2175

2176
	DBUG_ENTER("general_fetch");
2177

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	srv_conc_enter_innodb(prebuilt->trx);
	
	ret = row_search_for_mysql((byte*)buf, 0, prebuilt, match_mode,
								direction);
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	srv_conc_exit_innodb(prebuilt->trx);
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	if (ret == DB_SUCCESS) {
		error = 0;
		table->status = 0;

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

	} else if (ret == DB_END_OF_INDEX) {
		error = HA_ERR_END_OF_FILE;
		table->status = STATUS_NOT_FOUND;
	} else {
		error = convert_error_code_to_mysql(ret);
		table->status = STATUS_NOT_FOUND;
	}
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2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211
	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 */
2212
	mysql_byte* 	buf)	/* in/out: buffer for next row in MySQL
2213 2214
				format */
{
2215 2216
  	statistic_increment(ha_read_next_count, &LOCK_status);

2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227
	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 */
2228 2229
	mysql_byte* 	buf,	/* in/out: buffer for the row */
	const mysql_byte* key,	/* in: key value */
2230 2231
	uint 		keylen)	/* in: key value length */
{
2232
  	statistic_increment(ha_read_next_count, &LOCK_status);
2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245

	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 */
2246
	mysql_byte* 	buf)	/* in/out: buffer for previous row in MySQL
2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258
				format */
{
	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(
/*=====================*/
2259
				/* out: 0, HA_ERR_END_OF_FILE,
2260 2261
				or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
2262 2263 2264 2265 2266 2267 2268 2269
{
	int	error;

  	DBUG_ENTER("index_first");
  	statistic_increment(ha_read_first_count, &LOCK_status);

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

2270 2271 2272 2273 2274 2275
        /* 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;
  	}

2276 2277 2278 2279 2280 2281 2282 2283 2284 2285
  	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(
/*====================*/
2286 2287
				/* out: 0, HA_ERR_END_OF_FILE, or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
2288 2289 2290 2291
{
	int	error;

  	DBUG_ENTER("index_first");
2292
  	statistic_increment(ha_read_last_count, &LOCK_status);
2293 2294 2295

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

2296
        /* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311

  	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 */
2312
	bool	scan)	/* in: ???????? */
2313
{
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	int	err;
	
2316
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
2317

2318
	if (prebuilt->clust_index_was_generated) {
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		err = change_active_index(MAX_KEY);
2320
	} else {
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		err = change_active_index(primary_key);
2322
	}
2323

2324
  	start_of_scan = 1;
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 	return(err);
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}

/*********************************************************************
Ends a table scan ???????????????? */

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

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

int
ha_innobase::rnd_next(
/*==================*/
			/* out: 0, HA_ERR_END_OF_FILE, or error number */
2348
	mysql_byte* buf)/* in/out: returns the row in this buffer,
2349 2350
			in MySQL format */
{
2351
	int	error;
2352 2353 2354 2355

  	DBUG_ENTER("rnd_next");
  	statistic_increment(ha_read_rnd_next_count, &LOCK_status);

2356
  	if (start_of_scan) {
2357 2358 2359 2360
		error = index_first(buf);
		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
2361
		start_of_scan = 0;
2362
	} else {
2363
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
2364
	}
2365

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  	DBUG_RETURN(error);
}

/**************************************************************************
Fetches a row from the table based on a reference. TODO: currently we use
'ref_stored_len' of the handle as the key length. This may change. */
2372

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int
ha_innobase::rnd_pos(
/*=================*/
2376 2377 2378 2379
				/* out: 0, HA_ERR_KEY_NOT_FOUND,
				or error code */
	mysql_byte* 	buf,	/* in/out: buffer for the row */
	mysql_byte*	pos)	/* in: primary key value in MySQL format */
2380
{
2381 2382 2383
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error;
	uint		keynr	= active_index;
2384

2385 2386
	DBUG_ENTER("rnd_pos");
	statistic_increment(ha_read_rnd_count, &LOCK_status);
2387

2388 2389 2390 2391 2392
	if (prebuilt->clust_index_was_generated) {
		/* No primary key was defined for the table and we
		generated the clustered index from the row id: the
		row reference is the row id, not any key value
		that MySQL knows */
2393

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		error = change_active_index(MAX_KEY);
2395
	} else {
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		error = change_active_index(primary_key);
2397
	}
2398

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	if (error) {
		DBUG_RETURN(error);
	}
	
2403 2404
	error = index_read(buf, pos, ref_stored_len, HA_READ_KEY_EXACT);

2405
	change_active_index(keynr);
2406

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  	DBUG_RETURN(error);
}

/*************************************************************************
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Stores a reference to the current row to 'ref' field of the handle. Note
that the function parameter is illogical: we must assume that 'record'
is the current 'position' of the handle, because if row ref is actually
2414
the row id internally generated in InnoDB, then 'record' does not contain
2415 2416
it. We just guess that the row id must be for the record where the handle
was positioned the last time. */
2417 2418 2419 2420

void
ha_innobase::position(
/*==================*/
2421
	const mysql_byte*	record)	/* in: row in MySQL format */
2422
{
2423 2424
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	uint		len;
2425

2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
	if (prebuilt->clust_index_was_generated) {
		/* No primary key was defined for the table and we
		generated the clustered index from row id: the
		row reference will be the row id, not any key value
		that MySQL knows */

		len = DATA_ROW_ID_LEN;

		memcpy(ref, prebuilt->row_id, len);
	} else {
		len = store_key_val_for_row(primary_key, (char*) ref, record);
	}
2438

2439
	dbug_assert(len <= ref_length);
2440 2441 2442 2443 2444

	ref_stored_len = len;
}

/*********************************************************************
2445
Creates a table definition to an InnoDB database. */
2446 2447 2448 2449
static
int
create_table_def(
/*=============*/
2450
	trx_t*		trx,		/* in: InnoDB transaction handle */
2451 2452 2453 2454 2455 2456 2457 2458 2459
	TABLE*		form,		/* in: information on table
					columns and indexes */
	const char*	table_name)	/* in: table name */
{
	Field*		field;
	dict_table_t*	table;
	ulint		n_cols;
  	int 		error;
  	ulint		col_type;
2460 2461
  	ulint		nulls_allowed;
	ulint		unsigned_type;
2462
  	ulint		i;
2463

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

	n_cols = form->fields;

	/* The '0' below specifies that everything is currently
	created in tablespace 0 */

	table = dict_mem_table_create((char*) table_name, 0, n_cols);
2473

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

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		col_type = get_innobase_type_from_mysql_type(field);
		if (field->null_ptr) {
			nulls_allowed = 0;
		} else {
			nulls_allowed = DATA_NOT_NULL;
		}

		if (field->flags & UNSIGNED_FLAG) {
			unsigned_type = DATA_UNSIGNED;
		} else {
			unsigned_type = 0;
		}
2489 2490

		dict_mem_table_add_col(table, (char*) field->field_name,
2491 2492
					col_type, (ulint)field->type()
					| nulls_allowed | unsigned_type,
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					field->pack_length(), 0);
	}

	error = row_create_table_for_mysql(table, trx);

	error = convert_error_code_to_mysql(error);

	DBUG_RETURN(error);
}

/*********************************************************************
2504
Creates an index in an InnoDB database. */
2505 2506
static
int
2507 2508
create_index(
/*=========*/
2509
	trx_t*		trx,		/* in: InnoDB transaction handle */
2510 2511 2512 2513 2514 2515
	TABLE*		form,		/* in: information on table
					columns and indexes */
	const char*	table_name,	/* in: table name */
	uint		key_num)	/* in: index number */
{
	dict_index_t*	index;
2516
  	int 		error;
2517 2518 2519 2520 2521 2522
	ulint		n_fields;
	KEY*		key;
	KEY_PART_INFO*	key_part;
	ulint		ind_type;
  	ulint		i;

2523
  	DBUG_ENTER("create_index");
2524

2525 2526 2527
	key = form->key_info + key_num;

    	n_fields = key->key_parts;
2528

2529 2530
    	ind_type = 0;

2531
    	if (strcmp(key->name, "PRIMARY") == 0) {
2532 2533
		ind_type = ind_type | DICT_CLUSTERED;
	}
2534

2535 2536 2537 2538
	if (key->flags & HA_NOSAME ) {
		ind_type = ind_type | DICT_UNIQUE;
	}

2539
	/* The '0' below specifies that everything in InnoDB is currently
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	created in tablespace 0 */

	index = dict_mem_index_create((char*) table_name, key->name, 0,
						ind_type, n_fields);
	for (i = 0; i < n_fields; i++) {
		key_part = key->key_part + i;

		/* We assume all fields should be sorted in ascending
		order, hence the '0': */
		dict_mem_index_add_field(index,
				(char*) key_part->field->field_name, 0);
	}

	error = row_create_index_for_mysql(index, trx);

	error = convert_error_code_to_mysql(error);

	DBUG_RETURN(error);
}

/*********************************************************************
2561
Creates an index to an InnoDB table when the user has defined no
2562
primary index. */
2563 2564
static
int
2565 2566
create_clustered_index_when_no_primary(
/*===================================*/
2567
	trx_t*		trx,		/* in: InnoDB transaction handle */
2568 2569 2570
	const char*	table_name)	/* in: table name */
{
	dict_index_t*	index;
2571 2572
  	int 		error;

2573
	/* The first '0' below specifies that everything in InnoDB is
2574 2575
	currently created in file space 0 */

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	index = dict_mem_index_create((char*) table_name,
				      (char*) "GEN_CLUST_INDEX",
				      0, DICT_CLUSTERED, 0);
2579 2580 2581 2582
	error = row_create_index_for_mysql(index, trx);

	error = convert_error_code_to_mysql(error);

2583
	return(error);
2584 2585 2586
}

/*********************************************************************
2587
Creates a new table to an InnoDB database. */
2588 2589 2590 2591 2592 2593 2594 2595

int
ha_innobase::create(
/*================*/
					/* out: error number */
	const char*	name,		/* in: table name */
	TABLE*		form,		/* in: information on table
					columns and indexes */
2596 2597 2598
	HA_CREATE_INFO*	create_info)	/* in: more information of the
					created table, contains also the
					create statement string */
2599 2600 2601 2602
{
	int		error;
	dict_table_t*	innobase_table;
	trx_t*		trx;
2603 2604 2605
	int		primary_key_no	= -1;
	KEY*		key;
	uint		i;
2606 2607
	char		name2[FN_REFLEN];
	char		norm_name[FN_REFLEN];
2608

2609 2610 2611 2612
  	DBUG_ENTER("ha_innobase::create");

	trx = trx_allocate_for_mysql();

2613
	fn_format(name2, name, "", "",2);	// Remove the .frm extension
2614 2615

	normalize_table_name(norm_name, name2);
2616

2617
  	/* Create the table definition in InnoDB */
2618

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2619
  	if (error = create_table_def(trx, form, norm_name)) {
2620 2621 2622 2623 2624 2625 2626 2627

		trx_commit_for_mysql(trx);

  		trx_free_for_mysql(trx);

 		DBUG_RETURN(error);
 	}

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	/* Look for a primary key */

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

    		if (strcmp(key->name, "PRIMARY") == 0) {
    			primary_key_no = (int) i;
2635 2636 2637
    		}
	}

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

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

2643 2644
	/* Create the keys */

2645 2646 2647
	if (form->keys == 0 || primary_key_no == -1) {
		/* Create an index which is used as the clustered index;
		order the rows by their row id which is internally generated
2648
		by InnoDB */
2649

2650
		error = create_clustered_index_when_no_primary(trx,
2651
							norm_name);
2652 2653
  		if (error) {
			trx_commit_for_mysql(trx);
2654

2655 2656 2657 2658
			trx_free_for_mysql(trx);

			DBUG_RETURN(error);
      		}
2659 2660 2661
	}

	if (primary_key_no != -1) {
2662
		/* In InnoDB the clustered index must always be created
2663
		first */
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	    	if ((error = create_index(trx, form, norm_name,
					  (uint) primary_key_no))) {
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			trx_commit_for_mysql(trx);

  			trx_free_for_mysql(trx);

			DBUG_RETURN(error);
      		}
      	}

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

		if (i != (uint) primary_key_no) {

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2678
    			if ((error = create_index(trx, form, norm_name, i))) {
2679 2680 2681 2682 2683 2684 2685

				trx_commit_for_mysql(trx);

  				trx_free_for_mysql(trx);

				DBUG_RETURN(error);
      			}
2686
      		}
2687
  	}
2688

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	error = row_table_add_foreign_constraints(trx,
				create_info->create_statement, norm_name);

	error = convert_error_code_to_mysql(error);

	if (error) {
		trx_commit_for_mysql(trx);

  		trx_free_for_mysql(trx);

		DBUG_RETURN(error);
	}

2702 2703
  	trx_commit_for_mysql(trx);

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	/* 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);

2710
	innobase_table = dict_table_get(norm_name, NULL);
2711 2712

	assert(innobase_table);
2713

2714
	/* Tell the InnoDB server that there might be work for
2715 2716 2717 2718 2719 2720 2721 2722 2723 2724
	utility threads: */

	srv_active_wake_master_thread();

  	trx_free_for_mysql(trx);

	DBUG_RETURN(0);
}

/*********************************************************************
2725
Drops a table from an InnoDB database. Before calling this function,
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2726 2727
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
2728 2729
operation inside InnoDB will remove all locks any user has on the table
inside InnoDB. */
2730 2731 2732 2733

int
ha_innobase::delete_table(
/*======================*/
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				/* out: error number */
	const char*	name)	/* in: table name */
2736 2737 2738 2739
{
	ulint	name_len;
	int	error;
	trx_t*	trx;
2740
	char	norm_name[1000];
2741

2742 2743 2744 2745 2746 2747 2748
  	DBUG_ENTER("ha_innobase::delete_table");

	trx = trx_allocate_for_mysql();

	name_len = strlen(name);

	assert(name_len < 1000);
2749

2750 2751
	/* Strangely, MySQL passes the table name without the '.frm'
	extension, in contrast to ::create */
2752

2753 2754
	normalize_table_name(norm_name, name);

2755
  	/* Drop the table in InnoDB */
2756

2757
  	error = row_drop_table_for_mysql(norm_name, trx, FALSE);
2758

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	/* 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);

2765
	/* Tell the InnoDB server that there might be work for
2766 2767 2768 2769
	utility threads: */

	srv_active_wake_master_thread();

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  	trx_commit_for_mysql(trx);

2772 2773 2774 2775 2776 2777 2778
  	trx_free_for_mysql(trx);

	error = convert_error_code_to_mysql(error);

	DBUG_RETURN(error);
}

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/*********************************************************************
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;
	trx_t*	trx;
	char*	ptr;
	int	error;
	char	namebuf[10000];
	
	ptr = strend(path) - 2;
	
	while (ptr >= path && *ptr != '\\' && *ptr != '/') {
		ptr--;
		len++;
	}

	ptr++;

	memcpy(namebuf, ptr, len);
	namebuf[len] = '/';
	namebuf[len + 1] = '\0';
	
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2810 2811 2812 2813 2814 2815 2816 2817 2818 2819
#ifdef __WIN__
	/* Put to lower case */

	ptr = namebuf;

	while (*ptr != '\0') {
	        *ptr = tolower(*ptr);
	        ptr++;
	}
#endif
2820 2821 2822 2823
	trx = trx_allocate_for_mysql();

  	error = row_drop_database_for_mysql(namebuf, trx);

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	/* 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);

2830 2831 2832 2833 2834
	/* Tell the InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

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  	trx_commit_for_mysql(trx);
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  	trx_free_for_mysql(trx);

	error = convert_error_code_to_mysql(error);

	return(error);
}

2843
/*************************************************************************
2844
Renames an InnoDB table. */
2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856

int
ha_innobase::rename_table(
/*======================*/
				/* out: 0 or error code */
	const char*	from,	/* in: old name of the table */
	const char*	to)	/* in: new name of the table */
{
	ulint	name_len1;
	ulint	name_len2;
	int	error;
	trx_t*	trx;
2857 2858
	char	norm_from[1000];
	char	norm_to[1000];
2859

2860 2861 2862 2863 2864 2865 2866 2867 2868
  	DBUG_ENTER("ha_innobase::rename_table");

	trx = trx_allocate_for_mysql();

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

	assert(name_len1 < 1000);
	assert(name_len2 < 1000);
2869

2870 2871 2872
	normalize_table_name(norm_from, from);
	normalize_table_name(norm_to, to);

2873
  	/* Rename the table in InnoDB */
2874

2875
  	error = row_rename_table_for_mysql(norm_from, norm_to, trx);
2876

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	/* 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);

2883
	/* Tell the InnoDB server that there might be work for
2884 2885 2886 2887
	utility threads: */

	srv_active_wake_master_thread();

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  	trx_commit_for_mysql(trx);
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  	trx_free_for_mysql(trx);

	error = convert_error_code_to_mysql(error);

	DBUG_RETURN(error);
}

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

ha_rows
ha_innobase::records_in_range(
/*==========================*/
						/* out: estimated number of rows,
						currently 32-bit int or uint */
	int 			keynr,		/* in: index number */
2905
	const mysql_byte*	start_key,	/* in: start key value of the
2906 2907 2908 2909 2910
						range, may also be empty */
	uint 			start_key_len,	/* in: start key val len, may
						also be 0 */
	enum ha_rkey_function 	start_search_flag,/* in: start search condition
						e.g., 'greater than' */
2911
	const mysql_byte*	end_key,	/* in: range end key val, may
2912 2913 2914 2915 2916 2917 2918 2919
						also be empty */
	uint 			end_key_len,	/* in: range end key val len,
						may also be 0 */
	enum ha_rkey_function 	end_search_flag)/* in: range end search cond */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	KEY*		key;
	dict_index_t*	index;
2920
	mysql_byte*	key_val_buff2 	= (mysql_byte*) my_malloc(
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						  table->reclength
      						+ table->max_key_length + 100,
2923
								MYF(MY_WME));
2924
	dtuple_t*	range_start;
2925 2926 2927 2928
	dtuple_t*	range_end;
	ulint		n_rows;
	ulint		mode1;
	ulint		mode2;
2929 2930
	void*           heap1;
	void*           heap2;
2931

2932
   	DBUG_ENTER("records_in_range");
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	/* Warning: since it is not sure that MySQL calls external_lock
	before calling this function, the trx field in prebuilt can be
	obsolete! */
2937
   	
2938 2939 2940
	active_index = keynr;

	key = table->key_info + active_index;
2941

2942
	index = dict_table_get_index_noninline(prebuilt->table, key->name);
2943

2944
	range_start = dtuple_create_for_mysql(&heap1, key->key_parts);
2945
 	dict_index_copy_types(range_start, index, key->key_parts);
2946

2947
	range_end = dtuple_create_for_mysql(&heap2, key->key_parts);
2948
 	dict_index_copy_types(range_end, index, key->key_parts);
2949

2950 2951 2952 2953
	row_sel_convert_mysql_key_to_innobase(
				range_start, (byte*) key_val_buff, index,
				(byte*) start_key,
				(ulint) start_key_len);
2954

2955 2956 2957 2958 2959
	row_sel_convert_mysql_key_to_innobase(
				range_end, (byte*) key_val_buff2, index,
				(byte*) end_key,
				(ulint) end_key_len);

2960 2961 2962
	mode1 = convert_search_mode_to_innobase(start_search_flag);
	mode2 = convert_search_mode_to_innobase(end_search_flag);

2963
	n_rows = btr_estimate_n_rows_in_range(index, range_start,
2964
						mode1, range_end, mode2);
2965 2966
	dtuple_free_for_mysql(heap1);
	dtuple_free_for_mysql(heap2);
2967

2968
    	my_free((char*) key_val_buff2, MYF(0));
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	DBUG_RETURN((ha_rows) n_rows);
}

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/*************************************************************************
Gives an UPPER BOUND to the number of rows in a table. This is used in
filesort.cc and the upper bound must hold. TODO: Since the number of
rows in a table may change after this function is called, we still may
get a 'Sort aborted' error in filesort.cc of MySQL. The ultimate fix is to
improve the algorithm of filesort.cc. */

ha_rows
ha_innobase::estimate_number_of_rows(void)
/*======================================*/
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			/* out: upper bound of rows */
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{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
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	dict_index_t*	index;
	ulonglong	estimate;
	ulonglong	data_file_length;
	
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	/* Warning: since it is not sure that MySQL calls external_lock
	before calling this function, the trx field in prebuilt can be
	obsolete! */

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 	DBUG_ENTER("info");

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	index = dict_table_get_first_index_noninline(prebuilt->table);
 	
	data_file_length = ((ulonglong) index->stat_n_leaf_pages)
    							* UNIV_PAGE_SIZE;
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	/* Calculate a minimum length for a clustered index record and from
	that an upper bound for the number of rows. Since we only calculate
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	new statistics in row0mysql.c when a tablehas grown
        by a threshold factor, we must add a safety factor 2 in front
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	of the formula below. */

	estimate = 2 * data_file_length / dict_index_calc_min_rec_len(index);
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	return((ha_rows) estimate);
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}

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/*************************************************************************
How many seeks it will take to read through the table. This is to be
comparable to the number returned by records_in_range so that we can
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;

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	/* 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. */
	
	return((double) (prebuilt->table->stat_clustered_index_size));
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}

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

void
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;
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	ulong		rec_per_key;
	ulong		j;
	ulong		i;
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 	DBUG_ENTER("info");
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	/* Warning: since it is not sure that MySQL calls external_lock
	before calling this function, the trx field in prebuilt can be
	obsolete! */
   	   	
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 	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 */

 		dict_update_statistics(ib_table);
 	}

	if (flag & HA_STATUS_VARIABLE) {
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    		records = (ha_rows)ib_table->stat_n_rows;
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    		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 {
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    			mean_rec_length = (ulong) (data_file_length / records);
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    		}
    	}

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

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

					rec_per_key = records;
				} else {
					rec_per_key = (ulong)(records /
   				         index->stat_n_diff_key_vals[j + 1]);
				}

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				/* Since MySQL seems to favor table scans
				too much over index searches, we pretend
				index selectivity is 2 times better than
				our estimate: */

				rec_per_key = rec_per_key / 2;

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				if (rec_per_key == 0) {
					rec_per_key = 1;
				}
			
				table->key_info[i].rec_per_key[j]
								= rec_per_key;
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			}
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			index = dict_table_get_next_index_noninline(index);
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		}
	}
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	/* The trx struct in InnoDB contains a pthread mutex embedded:
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	in the debug version of MySQL that it replaced by a 'safe mutex'
	which is of a different size. We have to use a function to access
	trx fields. Otherwise trx->error_info will be a random
	pointer and cause a seg fault. */

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  	if (flag & HA_STATUS_ERRKEY) {
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		ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);

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		errkey = (unsigned int) row_get_mysql_key_number_for_index(
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				       (dict_index_t*)
				       trx_get_error_info(prebuilt->trx));
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  	}
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  	DBUG_VOID_RETURN;
}

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/***********************************************************************
Tries to check that an InnoDB table is not corrupted. If corruption is
noticed, prints to stderr information about it. In case of corruption
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;
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	ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);

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	if (prebuilt->mysql_template == NULL) {
		/* Build the template; we will use a dummy template
		in index scans done in checking */

		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
	}

	ret = row_check_table_for_mysql(prebuilt);

	if (ret == DB_SUCCESS) {
		return(HA_ADMIN_OK);
	}
	
  	return(HA_ADMIN_CORRUPT); 
}

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/*****************************************************************
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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. */
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char*
ha_innobase::update_table_comment(
/*==============================*/
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				/* out: table comment + InnoDB free space +
				info on foreign keys */
        const char*	comment)/* in: table comment defined by user */
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{
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	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
  	uint 		length 	= strlen(comment);
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  	char*		str 	= my_malloc(length + 550, MYF(0));
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  	char*		pos;
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	/* Warning: since it is not sure that MySQL calls external_lock
	before calling this function, the trx field in prebuilt can be
	obsolete! */
   	
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	if (!str) {
    		return((char*)comment);
	}

	pos = str;
  	if (length) {
    		pos=strmov(str, comment);
    		*pos++=';';
    		*pos++=' ';
  	}
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  	pos += sprintf(pos, "InnoDB free: %lu kB",
					(ulong) innobase_get_free_space());
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	/* We assume 150 bytes of space to print info */
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  	dict_print_info_on_foreign_keys(pos, 500, prebuilt->table);
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  	return(str);
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}

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/***********************************************************************
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)
                           /* in: HA_EXTRA_DONT_USE_CURSOR_TO_UPDATE */
{
	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) {
 		case HA_EXTRA_RESET:
  		case HA_EXTRA_RESET_STATE:
	        	prebuilt->read_just_key = 0;
	        	break;
		case HA_EXTRA_NO_KEYREAD:
    			prebuilt->read_just_key = 0;
    			break;
	        case HA_EXTRA_DONT_USE_CURSOR_TO_UPDATE:
			prebuilt->in_update_remember_pos = FALSE;
			break;
	        case HA_EXTRA_KEYREAD:
	        	prebuilt->read_just_key = 1;
	        	break;
		default:/* Do nothing */
			;
	}

	return(0);
}

/**********************************************************************
????????????? */

int
ha_innobase::reset(void)
/*====================*/
{
  	return(0);
}

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/**********************************************************************
As MySQL will execute an external lock for every new table it uses when it
starts to process an SQL statement, we can use this function to store the
pointer to the THD in the handle. We will also use this function to communicate
to InnoDB that a new SQL statement has started and that we must store a
savepoint to our transaction handle, so that we are able to roll back
the SQL statement in case of an error. */

int
ha_innobase::external_lock(
/*=======================*/
	THD*	thd,		/* in: handle to the user thread */
	int 	lock_type)	/* in: lock type */
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int 		error = 0;
	trx_t*		trx;

  	DBUG_ENTER("ha_innobase::external_lock");

	update_thd(thd);

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->in_update_remember_pos = TRUE;

	prebuilt->read_just_key = 0;

	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;
	}

	if (lock_type != F_UNLCK) {
		if (trx->n_mysql_tables_in_use == 0) {
			trx_mark_sql_stat_end(trx);
		}

		thd->transaction.all.innodb_active_trans = 1;
		trx->n_mysql_tables_in_use++;

		if (prebuilt->select_lock_type != LOCK_NONE) {

		  	trx->mysql_n_tables_locked++;
		}
	} else {
		trx->n_mysql_tables_in_use--;
		auto_inc_counter_for_this_stat = 0;

		if (trx->n_mysql_tables_in_use == 0) {

		  	trx->mysql_n_tables_locked = 0;

			/* Here we release the search latch, auto_inc_lock,
			and InnoDB thread FIFO ticket if they were reserved. */

			innobase_release_stat_resources(trx);

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

		    		innobase_commit(thd, trx);
		  	}
		}
	}

	DBUG_RETURN(error);
}

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/****************************************************************************
 Handling the shared INNOBASE_SHARE structure that is needed to provide table
 locking.
****************************************************************************/

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static mysql_byte* innobase_get_key(INNOBASE_SHARE *share,uint *length,
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			      my_bool not_used __attribute__((unused)))
{
  *length=share->table_name_length;
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  return (mysql_byte*) share->table_name;
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}

static INNOBASE_SHARE *get_share(const char *table_name)
{
  INNOBASE_SHARE *share;
  pthread_mutex_lock(&innobase_mutex);
  uint length=(uint) strlen(table_name);
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  if (!(share=(INNOBASE_SHARE*) hash_search(&innobase_open_tables,
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					(mysql_byte*) table_name,
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					    length)))
  {
    if ((share=(INNOBASE_SHARE *) my_malloc(sizeof(*share)+length+1,
				       MYF(MY_WME | MY_ZEROFILL))))
    {
      share->table_name_length=length;
      share->table_name=(char*) (share+1);
      strmov(share->table_name,table_name);
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      if (hash_insert(&innobase_open_tables, (mysql_byte*) share))
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      {
	pthread_mutex_unlock(&innobase_mutex);
	my_free((gptr) share,0);
	return 0;
      }
      thr_lock_init(&share->lock);
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      pthread_mutex_init(&share->mutex,MY_MUTEX_INIT_FAST);
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    }
  }
  share->use_count++;
  pthread_mutex_unlock(&innobase_mutex);
  return share;
}

static void free_share(INNOBASE_SHARE *share)
{
  pthread_mutex_lock(&innobase_mutex);
  if (!--share->use_count)
  {
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    hash_delete(&innobase_open_tables, (mysql_byte*) share);
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    thr_lock_delete(&share->lock);
    pthread_mutex_destroy(&share->mutex);
    my_free((gptr) share, MYF(0));
  }
  pthread_mutex_unlock(&innobase_mutex);
}
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/*********************************************************************
Stores a MySQL lock into a 'lock' field in a handle. */

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
						'lock' */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;

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	if (lock_type == TL_READ_WITH_SHARED_LOCKS ||
	    lock_type == TL_READ_NO_INSERT) {
		/* This is a SELECT ... IN SHARE MODE, or
		we are doing a complex SQL statement like
		INSERT INTO ... SELECT ... and the logical logging
		requires the use of a locking read */

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		prebuilt->select_lock_type = LOCK_S;
	} else {
		/* We set possible LOCK_X value in external_lock, not yet
		here even if this would be SELECT ... FOR UPDATE */
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		prebuilt->select_lock_type = LOCK_NONE;
	}

	if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK) {

    		/* If we are not doing a LOCK TABLE, then allow multiple
		writers */

    		if ((lock_type >= TL_WRITE_CONCURRENT_INSERT &&
	 	    lock_type <= TL_WRITE) && !thd->in_lock_tables) {

      			lock_type = TL_WRITE_ALLOW_WRITE;
      		}

 		lock.type=lock_type;
  	}

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

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/***********************************************************************
Returns the next auto-increment column value for the table. write_row
normally fetches the value from the cache in the data dictionary. This
function in used by SHOW TABLE STATUS and when the first insert to the table
is done after database startup. */

longlong
ha_innobase::get_auto_increment()
/*=============================*/
                         /* out: the next auto-increment column value */
{
  row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
  longlong        nr;
  int             error;

  (void) extra(HA_EXTRA_KEYREAD);
  index_init(table->next_number_index);

  /* We use an exclusive lock when we read the max key value from the
  auto-increment column index. This is because then build_template will
  advise InnoDB to fetch all columns. In SHOW TABLE STATUS the query
  id of the auto-increment column is not changed, and previously InnoDB
  did not fetch it, causing SHOW TABLE STATUS to show wrong values
  for the autoinc column. */

  prebuilt->select_lock_type = LOCK_X;
  prebuilt->trx->mysql_n_tables_locked += 1;
  
  error=index_last(table->record[1]);

  if (error) {
    nr = 1;
  } else {
    nr = (longlong) table->next_number_field->
                        val_int_offset(table->rec_buff_length) + 1;
  }

  (void) extra(HA_EXTRA_NO_KEYREAD);

  index_end();

  return(nr);
}

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#endif /* HAVE_INNOBASE_DB */