ha_innobase.cc 85 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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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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/************************************************************************
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
standatd output. NOTE that mysql/innobase/trx/trx0trx.c must contain
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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	}

	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();

586
	if (ret == FALSE) {
587
	  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;
595
	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;
601

602
	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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609
	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) {

629
	  DBUG_RETURN(1);
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	}
	(void) hash_init(&innobase_open_tables,32,0,0,
			 (hash_get_key) innobase_get_key,0,0);
633
	pthread_mutex_init(&innobase_mutex,MY_MUTEX_INIT_FAST);
634
  	DBUG_RETURN(0);
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}

/***********************************************************************
638
Closes an InnoDB database. */
639

640
bool
641 642
innobase_end(void)
/*==============*/
643
				/* out: TRUE if error */
644 645 646 647 648 649
{
	int	err;

	DBUG_ENTER("innobase_end");

	err = innobase_shutdown_for_mysql();
650
	hash_free(&innobase_open_tables);
651 652 653

	if (err != DB_SUCCESS) {

654
	  DBUG_RETURN(1);
655
	}
656

657
  	DBUG_RETURN(0);
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}

/********************************************************************
661
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. */

664
bool
665 666
innobase_flush_logs(void)
/*=====================*/
667
				/* out: TRUE if error */
668
{
669
  	bool 	result = 0;
670 671 672

  	DBUG_ENTER("innobase_flush_logs");

673
	log_flush_up_to(ut_dulint_max, LOG_WAIT_ONE_GROUP);
674

675 676 677
  	DBUG_RETURN(result);
}

678
/*************************************************************************
679
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));
}

689
/*********************************************************************
690
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 */
698
	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;
703
	trx_t*	trx;
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  	DBUG_ENTER("innobase_commit");
  	DBUG_PRINT("trans", ("ending transaction"));

708
	trx = check_trx_exists(thd);
709

710
	if (trx_handle != (void*)&innodb_dummy_stmt_trx_handle) {
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		srv_conc_enter_innodb(trx);

713
		trx_commit_for_mysql(trx);
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		srv_conc_exit_innodb();
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	}
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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
725
	/* Tell InnoDB server that there might be work for
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	utility threads: */

	srv_active_wake_master_thread();

	DBUG_RETURN(error);
}

/*********************************************************************
734
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
741
			whose transaction should be rolled back */
742
	void*	trx_handle)/* in: InnoDB trx handle or a dummy stmt handle */
743 744
{
	int	error = 0;
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	trx_t*	trx;
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	DBUG_ENTER("innobase_rollback");
	DBUG_PRINT("trans", ("aborting transaction"));

750
	trx = check_trx_exists(thd);
751

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	srv_conc_enter_innodb(trx);

754
	if (trx_handle != (void*)&innodb_dummy_stmt_trx_handle) {
755
		error = trx_rollback_for_mysql(trx);
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	} else {
757
		error = trx_rollback_last_sql_stat_for_mysql(trx);
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	}
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	srv_conc_exit_innodb();
	
	trx_mark_sql_stat_end(trx);

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	DBUG_RETURN(convert_error_code_to_mysql(error));
}

/*********************************************************************
768
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));
781
		trx_free_for_mysql((trx_t*)
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				(thd->transaction.all.innobase_tid));
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	}

	return(0);
786
}
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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);
}


/*****************************************************************************
802
** InnoDB database tables
803 804 805
*****************************************************************************/

/********************************************************************
806 807 808
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
/*========================*/
813 814
				/* out: file extension strings, currently not
				used */
815
{
816
	static const char* ext[] = {".InnoDB", NullS};
817

818 819 820
	return(ext);
}

821 822 823
/*********************************************************************
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 */

840
	ptr = strend(name)-1;
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	while (ptr >= name && *ptr != '\\' && *ptr != '/') {
		ptr--;
	}

	name_ptr = ptr + 1;

848
	dbug_assert(ptr > name);
849 850

	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
872
}
873

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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 */
885
{
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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;

902 903 904
	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
911
							+ MAX_REF_PARTS * 3;
912
	if (!(mysql_byte*) my_multi_malloc(MYF(MY_WME),
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				     &upd_buff, buff_len,
				     &key_val_buff, buff_len,
915
				     NullS)) {
916
	  	free_share(share);
917
	  	DBUG_RETURN(1);
918 919
  	}

920
	/* Get pointer to a table object in InnoDB dictionary cache */
921

922
 	if (NULL == (ib_table = dict_table_get(norm_name, NULL))) {
923

924
	  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);

932
	        free_share(share);
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    		my_free((char*) upd_buff, MYF(0));
934 935 936 937
    		my_errno = ENOENT;
    		DBUG_RETURN(1);
  	}

938
	innobase_prebuilt = row_create_prebuilt(ib_table);
939

940
	((row_prebuilt_t*)innobase_prebuilt)->mysql_row_len = table->reclength;
941

942 943 944
  	primary_key = MAX_KEY;

  	if (!row_table_got_default_clust_index(ib_table)) {
945 946 947 948 949 950

		/* 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. */
951 952 953 954

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

955
		primary_key = 0;
956
		key_used_on_scan = 0;
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 		/* 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 */
965
	} else {
966 967 968
		((row_prebuilt_t*)innobase_prebuilt)
				->clust_index_was_generated = TRUE;

969 970
  		ref_length = DATA_ROW_ID_LEN + 10;
				
971
		dbug_assert(key_used_on_scan == MAX_KEY);
972
	}
973

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	auto_inc_counter_for_this_stat = 0;

	/* Init table lock structure */
977
	thr_lock_data_init(&share->lock,&lock,(void*) 0);
978 979

  	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
980

981 982 983 984 985 986 987 988 989 990
  	DBUG_RETURN(0);
}

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

void
ha_innobase::initialize(void)
/*=========================*/
{
991
}
992 993

/**********************************************************************
994
Closes a handle to an InnoDB table. */
995 996 997 998 999 1000 1001 1002 1003 1004

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

	row_prebuilt_free((row_prebuilt_t*) innobase_prebuilt);

1005
    	my_free((char*) upd_buff, MYF(0));
1006 1007
        free_share(share);

1008
	/* Tell InnoDB server that there might be work for
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
	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 */
1025
	TABLE*	table,	/* in: MySQL table object */
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
	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 */
1039
	TABLE*	table,	/* in: MySQL table object */
1040 1041 1042 1043 1044 1045 1046 1047 1048
	Field*	field,	/* in: MySQL field object */
	char*	record)	/* in: a row in MySQL format */
{
	int	null_offset;

	if (!field->null_ptr) {

		return(0);
	}
1049

1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
	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(
/*========================*/
1068
	TABLE*	table,	/* in: MySQL table object */
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
	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(
/*============*/
1086
	TABLE*	table,	/* in: MySQL table object */
1087 1088 1089 1090 1091 1092 1093
	char*	record)	/* in: a row in MySQL format */
{
	bzero(record, table->null_bytes);
}

extern "C" {
/*****************************************************************
1094
InnoDB uses this function is to compare two data fields for which the
1095
data type is such that we must use MySQL code to compare them. NOTE that the
1096
prototype of this function is in rem0cmp.c in InnoDB source code!
1097
If you change this function, remember to update the prototype there! */
1098 1099 1100

int
innobase_mysql_cmp(
1101
/*===============*/
1102 1103
					/* out: 1, 0, -1, if a is greater,
					equal, less than b, respectively */
1104
	int		mysql_type,	/* in: MySQL type */
1105 1106 1107 1108 1109 1110 1111 1112
	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;
1113
	int                     ret;
1114

1115 1116
	dbug_assert(a_length != UNIV_SQL_NULL);
	dbug_assert(b_length != UNIV_SQL_NULL);
1117 1118 1119 1120 1121 1122 1123

	mysql_tp = (enum_field_types) mysql_type;

	switch (mysql_tp) {

	case FIELD_TYPE_STRING:
	case FIELD_TYPE_VAR_STRING:
1124 1125 1126 1127 1128 1129 1130 1131 1132
  		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);
	        }
1133 1134 1135 1136 1137 1138 1139 1140 1141
	default:
		assert(0);
	}

	return(0);
}
}

/******************************************************************
1142
Converts a MySQL type to an InnoDB type. */
1143 1144
inline
ulint
1145 1146 1147
get_innobase_type_from_mysql_type(
/*==============================*/
			/* out: DATA_BINARY, DATA_VARCHAR, ... */
1148 1149 1150
	Field*	field)	/* in: MySQL field */
{
	/* The following asserts check that MySQL type code fits in
1151 1152
	8 bits: this is used in ibuf and also when DATA_NOT_NULL is
	ORed to the type */
1153

1154 1155 1156 1157 1158
	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);
1159 1160

	switch (field->type()) {
1161
		case FIELD_TYPE_VAR_STRING: if (field->flags & BINARY_FLAG) {
1162 1163 1164 1165 1166 1167

						return(DATA_BINARY);
					} else if (strcmp(
						   default_charset_info->name,
							"latin1") == 0) {
						return(DATA_VARCHAR);
1168 1169
					} else {
						return(DATA_VARMYSQL);
1170
					}
1171 1172 1173 1174 1175 1176 1177
		case FIELD_TYPE_STRING: if (field->flags & BINARY_FLAG) {

						return(DATA_FIXBINARY);
					} else if (strcmp(
						   default_charset_info->name,
							"latin1") == 0) {
						return(DATA_CHAR);
1178 1179
					} else {
						return(DATA_MYSQL);
1180
					}
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		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:
1192 1193 1194
		case FIELD_TYPE_TIME:
		case FIELD_TYPE_TIMESTAMP:
					return(DATA_INT);
1195
		case FIELD_TYPE_FLOAT:
1196
					return(DATA_FLOAT);
1197
		case FIELD_TYPE_DOUBLE:
1198
					return(DATA_DOUBLE);
1199
		case FIELD_TYPE_DECIMAL:
1200 1201 1202 1203 1204 1205
					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);
1206 1207 1208 1209 1210 1211
		default:
					assert(0);
	}

	return(0);
}
1212

1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
/***********************************************************************
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) */
1223
	const mysql_byte* record)/* in: row in MySQL format */
1224 1225 1226 1227 1228
{
	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;
1229

1230 1231 1232 1233 1234 1235 1236 1237 1238
  	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) {
1239
				*buff++ = 1;
1240 1241 1242
				continue;
      			}

1243
      			*buff++ = 0;
1244
    		}
1245

1246 1247 1248 1249 1250 1251 1252 1253
		memcpy(buff, record + key_part->offset, key_part->length);
		buff += key_part->length;
  	}

	DBUG_RETURN(buff - buff_start);
}

/******************************************************************
1254
Builds a template to the prebuilt struct. */
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static
1256
void
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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 */
1266
{
1267 1268
	dict_index_t*	index;
	dict_index_t*	clust_index;
1269
	mysql_row_templ_t* templ;
1270
	Field*		field;
1271 1272
	ulint		n_fields;
	ulint		n_requested_fields	= 0;
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	ibool		fetch_all_in_key	= FALSE;
1274
	ulint		i;
1275

1276
	clust_index = dict_table_get_first_index_noninline(prebuilt->table);
1277

1278
	if (!prebuilt->in_update_remember_pos) {
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		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;
		}
1287 1288
	}

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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;
	}

1296
	if (templ_type == ROW_MYSQL_REC_FIELDS) {
1297

1298 1299 1300 1301
		if (prebuilt->select_lock_type != LOCK_NONE) {
			/* Let index be the clustered index */

			index = clust_index;
1302
		} else {
1303
			index = prebuilt->index;
1304
		}
1305 1306
	} else {
		index = clust_index;
1307
	}
1308

1309 1310 1311 1312 1313 1314 1315
	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 */
	}
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	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));
	}
1324

1325 1326
	prebuilt->template_type = templ_type;
	prebuilt->null_bitmap_len = table->null_bytes;
1327

1328 1329
	prebuilt->templ_contains_blob = FALSE;

1330
	for (i = 0; i < n_fields; i++) {
1331
		templ = prebuilt->mysql_template + n_requested_fields;
1332 1333
		field = table->field[i];

1334
		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))
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			&& 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++;
1349

1350
		templ->col_no = i;
1351

1352 1353 1354
		if (index == clust_index) {
			templ->rec_field_no = (index->table->cols + i)
								->clust_pos;
1355
		} else {
1356 1357
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
1358 1359
		}

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		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]);
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			templ->mysql_null_bit_mask = (ulint) field->null_bit;
		} else {
			templ->mysql_null_bit_mask = 0;
		}
1373

1374 1375
		templ->mysql_col_offset = (ulint)
					get_field_offset(table, field);
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		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);
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1381 1382
		if (templ->type == DATA_BLOB) {
			prebuilt->templ_contains_blob = TRUE;
1383
		}
1384 1385 1386
skip_field:
		;
	}
1387

1388
	prebuilt->n_template = n_requested_fields;
1389

1390 1391 1392 1393 1394
	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;
1395

1396 1397 1398
			templ->rec_field_no =
			    (index->table->cols + templ->col_no)->clust_pos;
		}
1399
	}
1400

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	if (templ_type == ROW_MYSQL_REC_FIELDS
				&& prebuilt->select_lock_type != LOCK_NONE) {

		prebuilt->need_to_access_clustered = TRUE;
	}
1406 1407 1408
}

/************************************************************************
1409
Stores a row in an InnoDB database, to the table specified in this
1410 1411 1412 1413 1414
handle. */

int
ha_innobase::write_row(
/*===================*/
1415 1416
				/* out: error code */
	mysql_byte* 	record)	/* in: a row in MySQL format */
1417
{
1418
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
1419
  	int 		error;
1420 1421
	longlong	auto_inc;
	
1422
  	DBUG_ENTER("ha_innobase::write_row");
1423 1424 1425 1426 1427 1428

  	statistic_increment(ha_write_count, &LOCK_status);

  	if (table->time_stamp) {
    		update_timestamp(record + table->time_stamp - 1);
    	}
1429

1430 1431 1432 1433 1434
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
	}

1435
  	if (table->next_number_field && record == table->record[0]) {
1436

1437 1438 1439 1440
	        /* Fetch the value the user possibly has set in the
	        autoincrement field */
	        
	        auto_inc = table->next_number_field->val_int();
1441 1442 1443 1444

		/* 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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		has not supplied a value, we must use it, and use values
		incremented by 1 in all subsequent inserts within the
		same SQL statement! */
1448 1449 1450

		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;
1452
		}
1453

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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;
		}
		
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		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 */
1473 1474 1475 1476 1477 1478 1479 1480

			/* 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);
1482
			error = row_lock_table_autoinc_for_mysql(prebuilt);
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			srv_conc_exit_innodb();
1484 1485 1486 1487 1488 1489 1490

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

1495 1496 1497 1498 1499
			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();
1501 1502 1503 1504 1505 1506 1507
			
					error = convert_error_code_to_mysql(
								error);
					goto func_exit;
				}
			}	

1508
			auto_inc = dict_table_autoinc_get(prebuilt->table);
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			srv_conc_exit_innodb();
1510

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			/* 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 */

1524 1525
	        prebuilt->in_update_remember_pos = FALSE;
	        
1526
    		update_auto_increment();
1527

1528 1529 1530 1531 1532 1533
		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();
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			if (error != DB_SUCCESS) {
			
				error = convert_error_code_to_mysql(error);
				goto func_exit;
			}	
			
1544 1545 1546 1547
			dict_table_autoinc_initialize(prebuilt->table,
								auto_inc);
		}
    		
1548 1549 1550 1551 1552 1553 1554
		/* 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;
1555
    	}
1556

1557 1558 1559 1560
	if (prebuilt->mysql_template == NULL
			|| prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) {
		/* Build the template used in converting quickly between
		the two database formats */
1561

1562 1563
		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
	}
1564

1565 1566 1567 1568 1569 1570 1571
	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);

1574
	error = row_insert_for_mysql((byte*) record, prebuilt);
1575

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	srv_conc_exit_innodb();

1578 1579
	prebuilt->trx->ignore_duplicates_in_insert = FALSE;

1580
	error = convert_error_code_to_mysql(error);
1581

1582
	/* Tell InnoDB server that there might be work for
1583
	utility threads: */
1584
func_exit:
1585
	innobase_active_small();
1586 1587 1588 1589

  	DBUG_RETURN(error);
}

1590
/******************************************************************
1591
Converts field data for storage in an InnoDB update vector. */
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601
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 */
1602
	ulint		col_type,/* in: data type in InnoDB type numbers */
1603
	ulint		is_unsigned)/* in: != 0 if an unsigned integer type */
1604
{
1605 1606 1607 1608
	uint	i;

	if (len == UNIV_SQL_NULL) {
		data = NULL;
1609 1610
	} else if (col_type == DATA_VARCHAR || col_type == DATA_BINARY
		   || col_type == DATA_VARMYSQL) {
1611 1612 1613 1614 1615
	        /* Remove trailing spaces */
        	while (len > 0 && data[len - 1] == ' ') {
	                len--;
	        }

1616
	} else if (col_type == DATA_INT) {
1617
		/* Store integer data in InnoDB in a big-endian
1618
		format, sign bit negated, if signed */
1619

1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630
		for (i = 0; i < len; i++) {
			buf[len - 1 - i] = data[i];
		}

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

		data = buf;

		buf += len;
1631
	}
1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651

	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 */
1652
	row_prebuilt_t*	prebuilt,	/* in: InnoDB prebuilt struct */
1653 1654 1655
	THD*		thd)		/* in: user thread */
{
	Field*		field;
1656 1657 1658
	uint		n_fields;
	ulint		o_len;
	ulint		n_len;
1659 1660 1661
	byte*	        o_ptr;
        byte*	        n_ptr;
        byte*	        buf;
1662
	upd_field_t*	ufield;
1663 1664
	ulint		col_type;
	ulint		is_unsigned;
1665
	ulint		n_changed = 0;
1666
	uint		i;
1667 1668 1669

	n_fields = table->fields;

1670
	/* We use upd_buff to convert changed fields */
1671
	buf = (byte*) upd_buff;
1672

1673 1674 1675
	for (i = 0; i < n_fields; i++) {
		field = table->field[i];

1676
		/* if (thd->query_id != field->query_id) { */
1677 1678
			/* TODO: check that these fields cannot have
			changed! */
1679

1680 1681
		/*	goto skip_field;
		}*/
1682

1683 1684
		o_ptr = (byte*) old_row + get_field_offset(table, field);
		n_ptr = (byte*) new_row + get_field_offset(table, field);
1685 1686 1687
		o_len = field->pack_length();
		n_len = field->pack_length();

1688
		col_type = get_innobase_type_from_mysql_type(field);
1689
		is_unsigned = (ulint) (field->flags & UNSIGNED_FLAG);
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704

		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:
			;
		}
1705

1706 1707 1708 1709 1710
		if (field->null_ptr) {
			if (field_in_record_is_null(table, field,
							(char*) old_row)) {
				o_len = UNIV_SQL_NULL;
			}
1711

1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723
			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;

1724 1725 1726 1727
			buf = (byte*)
                          innobase_convert_and_store_changed_col(ufield,
					  (mysql_byte*)buf,
					  (mysql_byte*)n_ptr, n_len, col_type,
1728
						is_unsigned);
1729
			ufield->exp = NULL;
1730 1731
			ufield->field_no =
					(prebuilt->table->cols + i)->clust_pos;
1732 1733
			n_changed++;
		}
1734
		;
1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
	}

	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.
1747
TODO: currently InnoDB does not prevent the 'Halloween problem':
1748 1749
in a searched update a single row can get updated several times
if its index columns are updated! */
1750

1751 1752 1753 1754
int
ha_innobase::update_row(
/*====================*/
					/* out: error number or 0 */
1755 1756
	const mysql_byte* 	old_row,/* in: old row in MySQL format */
	mysql_byte* 		new_row)/* in: new row in MySQL format */
1757 1758 1759 1760 1761
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	upd_t*		uvect;
	int		error = 0;

1762
	DBUG_ENTER("ha_innobase::update_row");
1763

1764 1765 1766 1767
        if (table->time_stamp) {
                update_timestamp(new_row + table->time_stamp - 1);
	}

1768 1769 1770 1771 1772
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
	}

1773 1774 1775 1776 1777
	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) */

1782 1783
	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);

1793
	error = row_update_for_mysql((byte*) old_row, prebuilt);
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	srv_conc_exit_innodb();

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	error = convert_error_code_to_mysql(error);

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

1802
	innobase_active_small();
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812

	DBUG_RETURN(error);
}

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

int
ha_innobase::delete_row(
/*====================*/
1813 1814
					/* out: error number or 0 */
	const mysql_byte* record)	/* in: a row in MySQL format */
1815 1816 1817 1818
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error = 0;

1819
	DBUG_ENTER("ha_innobase::delete_row");
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	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
	}

1826 1827 1828
	if (!prebuilt->upd_node) {
		row_get_prebuilt_update_vector(prebuilt);
	}
1829 1830

	/* This is a delete */
1831

1832
	prebuilt->upd_node->is_delete = TRUE;
1833
	prebuilt->in_update_remember_pos = TRUE;
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	srv_conc_enter_innodb(prebuilt->trx);

1837
	error = row_update_for_mysql((byte*) record, prebuilt);
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	srv_conc_exit_innodb();

1841 1842
	error = convert_error_code_to_mysql(error);

1843
	/* Tell the InnoDB server that there might be work for
1844 1845
	utility threads: */

1846
	innobase_active_small();
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862

	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);
1864 1865 1866 1867 1868

  	DBUG_RETURN(error);
}

/**********************************************************************
1869
Currently does nothing. */
1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882

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
1883
by InnoDB. */
1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906
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);
}
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1908 1909 1910 1911 1912 1913 1914 1915 1916
/**************************************************************************
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 */
1917
	mysql_byte*		buf,	/* in/out: buffer for the returned
1918
					row */
1919
	const mysql_byte* 	key_ptr,/* in: key value; if this is NULL
1920 1921
					we position the cursor at the
					start or end of index */
1922
	uint			key_len,/* in: key value length */
1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933
	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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1935 1936 1937 1938 1939
	if (last_query_id != user_thd->query_id) {
	        prebuilt->sql_stat_start = TRUE;
                last_query_id = user_thd->query_id;
	}

1940
	index = prebuilt->index;
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1942 1943 1944 1945
	/* 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 */
1946

1947 1948 1949 1950
	if (prebuilt->sql_stat_start) {
		build_template(prebuilt, user_thd, table,
							ROW_MYSQL_REC_FIELDS);
	}
1951 1952

	if (key_ptr) {
1953 1954 1955 1956 1957
		row_sel_convert_mysql_key_to_innobase(prebuilt->search_tuple,
							(byte*) key_val_buff,
							index,
							(byte*) key_ptr,
							(ulint) key_len);
1958 1959 1960 1961 1962 1963
	} else {
		/* We position the cursor to the last or the first entry
		in the index */

 		dtuple_set_n_fields(prebuilt->search_tuple, 0);
	}
1964

1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978
	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);

1981
	ret = row_search_for_mysql((byte*) buf, mode, prebuilt, match_mode, 0);
1982

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	srv_conc_exit_innodb();

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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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2001 2002 2003 2004 2005 2006 2007 2008 2009
	DBUG_RETURN(error);
}

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

int
ha_innobase::change_active_index(
/*=============================*/
2010 2011 2012
			/* out: 0 or error code */
	uint 	keynr)	/* in: use this index; MAX_KEY means always clustered
			index, even if it was internally generated by
2013
			InnoDB */
2014 2015 2016 2017 2018 2019
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	KEY*		key;

  	statistic_increment(ha_read_key_count, &LOCK_status);

2020
  	DBUG_ENTER("index_read_idx");
2021

2022 2023
	active_index = keynr;

2024
	if (keynr != MAX_KEY && table->keys > 0) {
2025
		key = table->key_info + active_index;
2026

2027
		prebuilt->index = dict_table_get_index_noninline(
2028
						prebuilt->table, key->name);
2029 2030
	} else {
		prebuilt->index = dict_table_get_first_index_noninline(
2031
							prebuilt->table);
2032 2033
	}

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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);

2044
	dtuple_set_n_fields(prebuilt->search_tuple, prebuilt->index->n_fields);
2045

2046 2047 2048 2049 2050 2051
 	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 */
2052

2053 2054
	build_template(prebuilt, user_thd, table, ROW_MYSQL_WHOLE_ROW);

2055
	return(0);
2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066
}

/**************************************************************************
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 */
2067
	mysql_byte*	buf,		/* in/out: buffer for the returned
2068 2069
					row */
	uint 		keynr,		/* in: use this index */
2070
	const mysql_byte* key,		/* in: key value; if this is NULL
2071 2072 2073 2074 2075
					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);
	}
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	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 */
2093
	mysql_byte* 	buf,	/* in/out: buffer for next row in MySQL
2094 2095 2096 2097 2098 2099 2100 2101
				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;
2102

2103
	DBUG_ENTER("general_fetch");
2104

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	srv_conc_enter_innodb(prebuilt->trx);
	
	ret = row_search_for_mysql((byte*)buf, 0, prebuilt, match_mode,
								direction);
	srv_conc_exit_innodb();
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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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	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 */
2139
	mysql_byte* 	buf)	/* in/out: buffer for next row in MySQL
2140 2141
				format */
{
2142 2143
  	statistic_increment(ha_read_next_count, &LOCK_status);

2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154
	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 */
2155 2156
	mysql_byte* 	buf,	/* in/out: buffer for the row */
	const mysql_byte* key,	/* in: key value */
2157 2158
	uint 		keylen)	/* in: key value length */
{
2159
  	statistic_increment(ha_read_next_count, &LOCK_status);
2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172

	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 */
2173
	mysql_byte* 	buf)	/* in/out: buffer for previous row in MySQL
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185
				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(
/*=====================*/
2186
				/* out: 0, HA_ERR_END_OF_FILE,
2187 2188
				or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
2189 2190 2191 2192 2193 2194 2195 2196
{
	int	error;

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

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

2197 2198 2199 2200 2201 2202
        /* 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;
  	}

2203 2204 2205 2206 2207 2208 2209 2210 2211 2212
  	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(
/*====================*/
2213 2214
				/* out: 0, HA_ERR_END_OF_FILE, or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
2215 2216 2217 2218
{
	int	error;

  	DBUG_ENTER("index_first");
2219
  	statistic_increment(ha_read_last_count, &LOCK_status);
2220 2221 2222

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

2223
        /* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238

  	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 */
2239
	bool	scan)	/* in: ???????? */
2240
{
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	int	err;
	
2243
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
2244

2245
	if (prebuilt->clust_index_was_generated) {
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		err = change_active_index(MAX_KEY);
2247
	} else {
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		err = change_active_index(primary_key);
2249
	}
2250

2251
  	start_of_scan = 1;
2252

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2253
 	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 */
2275
	mysql_byte* buf)/* in/out: returns the row in this buffer,
2276 2277
			in MySQL format */
{
2278
	int	error;
2279 2280 2281 2282

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

2283
  	if (start_of_scan) {
2284 2285 2286 2287
		error = index_first(buf);
		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
2288
		start_of_scan = 0;
2289
	} else {
2290
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
2291
	}
2292

2293 2294 2295 2296 2297 2298
  	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. */
2299

2300 2301 2302
int
ha_innobase::rnd_pos(
/*=================*/
2303 2304 2305 2306
				/* 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 */
2307
{
2308 2309 2310
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error;
	uint		keynr	= active_index;
2311

2312 2313
	DBUG_ENTER("rnd_pos");
	statistic_increment(ha_read_rnd_count, &LOCK_status);
2314

2315 2316 2317 2318 2319
	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 */
2320

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		error = change_active_index(MAX_KEY);
2322
	} else {
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		error = change_active_index(primary_key);
2324
	}
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	if (error) {
		DBUG_RETURN(error);
	}
	
2330 2331
	error = index_read(buf, pos, ref_stored_len, HA_READ_KEY_EXACT);

2332
	change_active_index(keynr);
2333

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  	DBUG_RETURN(error);
}

/*************************************************************************
2338 2339 2340
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
2341
the row id internally generated in InnoDB, then 'record' does not contain
2342 2343
it. We just guess that the row id must be for the record where the handle
was positioned the last time. */
2344 2345 2346 2347

void
ha_innobase::position(
/*==================*/
2348
	const mysql_byte*	record)	/* in: row in MySQL format */
2349
{
2350 2351
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	uint		len;
2352

2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364
	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);
	}
2365

2366
	dbug_assert(len <= ref_length);
2367 2368 2369 2370

	ref_stored_len = len;
}

2371 2372
/***********************************************************************
Tells something additional to the handler about how to do things. */
2373

2374 2375 2376 2377
int
ha_innobase::extra(
/*===============*/
			   /* out: 0 or error number */
2378
	enum ha_extra_function operation)
2379
                           /* in: HA_EXTRA_DONT_USE_CURSOR_TO_UPDATE */
2380
{
2381
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
2382

2383
	switch (operation) {
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 		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;
2391
	        case HA_EXTRA_DONT_USE_CURSOR_TO_UPDATE:
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			prebuilt->in_update_remember_pos = FALSE;
			break;
	        case HA_EXTRA_KEYREAD:
	        	prebuilt->read_just_key = 1;
	        	break;
		default:/* Do nothing */
			;
2399
	}
2400

2401
	return(0);
2402 2403 2404 2405
}

int ha_innobase::reset(void)
{
2406
  	return(0);
2407 2408 2409
}

/**********************************************************************
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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
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to InnoDB that a new SQL statement has started and that we must store a
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savepoint to our transaction handle, so that we are able to roll back
the SQL statement in case of an error. */
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int
ha_innobase::external_lock(
/*=======================*/
	THD*	thd,		/* in: handle to the user thread */
	int 	lock_type)	/* in: lock type */
{
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	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int 		error = 0;
	trx_t*		trx;
2426 2427 2428 2429

  	DBUG_ENTER("ha_innobase::external_lock");

	update_thd(thd);
2430 2431

	trx = prebuilt->trx;
2432

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	prebuilt->sql_stat_start = TRUE;
2434
	prebuilt->in_update_remember_pos = TRUE;
2435

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	prebuilt->read_just_key = 0;

2438
	if (lock_type == F_WRLCK) {
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		/* If this is a SELECT, then it is in UPDATE TABLE ...
		or SELECT ... FOR UPDATE */
		prebuilt->select_lock_type = LOCK_X;
	}
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	if (lock_type != F_UNLCK) {
		if (trx->n_mysql_tables_in_use == 0) {
			trx_mark_sql_stat_end(trx);
		}
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2450
		thd->transaction.all.innodb_active_trans = 1;
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		trx->n_mysql_tables_in_use++;
2452 2453 2454

		if (prebuilt->select_lock_type != LOCK_NONE) {

2455
		  	trx->mysql_n_tables_locked++;
2456
		}
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	} else {
		trx->n_mysql_tables_in_use--;
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		auto_inc_counter_for_this_stat = 0;
2460

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		if (trx->n_mysql_tables_in_use == 0) {

2463
		  	trx->mysql_n_tables_locked = 0;
2464

2465
		  	if (trx->has_search_latch) {
2466

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		    		trx_search_latch_release_if_reserved(trx);
		  	}
2469

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		  	if (trx->auto_inc_lock) {
		  	
		  		/* If we had reserved the auto-inc lock for
				some table in this SQL statement, we release
				it now */
		  	
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				srv_conc_enter_innodb(trx);
2477
				row_unlock_table_autoinc_for_mysql(trx);
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				srv_conc_exit_innodb();
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			}

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		  	if (!(thd->options
				 & (OPTION_NOT_AUTO_COMMIT | OPTION_BEGIN))) {
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		    		innobase_commit(thd, trx);
		  	}
2486
		}
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	}

2489
	DBUG_RETURN(error);
2490
}
2491 2492

/*********************************************************************
2493
Creates a table definition to an InnoDB database. */
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static
int
create_table_def(
/*=============*/
2498
	trx_t*		trx,		/* in: InnoDB transaction handle */
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	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;
2508 2509
  	ulint		nulls_allowed;
	ulint		unsigned_type;
2510
  	ulint		i;
2511

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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);
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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;
		}
2537 2538

		dict_mem_table_add_col(table, (char*) field->field_name,
2539 2540
					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);
}

/*********************************************************************
2552
Creates an index in an InnoDB database. */
2553 2554
static
int
2555 2556
create_index(
/*=========*/
2557
	trx_t*		trx,		/* in: InnoDB transaction handle */
2558 2559 2560 2561 2562 2563
	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;
2564
  	int 		error;
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	ulint		n_fields;
	KEY*		key;
	KEY_PART_INFO*	key_part;
	ulint		ind_type;
  	ulint		i;

2571
  	DBUG_ENTER("create_index");
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	key = form->key_info + key_num;

    	n_fields = key->key_parts;
2576

2577 2578
    	ind_type = 0;

2579
    	if (strcmp(key->name, "PRIMARY") == 0) {
2580 2581
		ind_type = ind_type | DICT_CLUSTERED;
	}
2582

2583 2584 2585 2586
	if (key->flags & HA_NOSAME ) {
		ind_type = ind_type | DICT_UNIQUE;
	}

2587
	/* 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);
}

/*********************************************************************
2609
Creates an index to an InnoDB table when the user has defined no
2610
primary index. */
2611 2612
static
int
2613 2614
create_clustered_index_when_no_primary(
/*===================================*/
2615
	trx_t*		trx,		/* in: InnoDB transaction handle */
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	const char*	table_name)	/* in: table name */
{
	dict_index_t*	index;
2619 2620
  	int 		error;

2621
	/* The first '0' below specifies that everything in InnoDB is
2622 2623
	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);
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	error = row_create_index_for_mysql(index, trx);

	error = convert_error_code_to_mysql(error);

2631
	return(error);
2632 2633 2634
}

/*********************************************************************
2635
Creates a new table to an InnoDB database. */
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int
ha_innobase::create(
/*================*/
					/* out: error number */
	const char*	name,		/* in: table name */
	TABLE*		form,		/* in: information on table
					columns and indexes */
2644 2645 2646
	HA_CREATE_INFO*	create_info)	/* in: more information of the
					created table, contains also the
					create statement string */
2647 2648 2649 2650
{
	int		error;
	dict_table_t*	innobase_table;
	trx_t*		trx;
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	int		primary_key_no	= -1;
	KEY*		key;
	uint		i;
2654 2655
	char		name2[FN_REFLEN];
	char		norm_name[FN_REFLEN];
2656

2657 2658 2659 2660
  	DBUG_ENTER("ha_innobase::create");

	trx = trx_allocate_for_mysql();

2661
	fn_format(name2, name, "", "",2);	// Remove the .frm extension
2662 2663

	normalize_table_name(norm_name, name2);
2664

2665
  	/* Create the table definition in InnoDB */
2666

2667
  	if ((error = create_table_def(trx, form, norm_name))) {
2668 2669 2670 2671 2672 2673 2674 2675

		trx_commit_for_mysql(trx);

  		trx_free_for_mysql(trx);

 		DBUG_RETURN(error);
 	}

2676 2677 2678 2679 2680 2681 2682
	/* 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;
2683 2684 2685
    		}
	}

2686 2687 2688 2689 2690
	/* 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);

2691 2692
	/* Create the keys */

2693 2694 2695
	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
2696
		by InnoDB */
2697

2698
		error = create_clustered_index_when_no_primary(trx,
2699
							norm_name);
2700 2701
  		if (error) {
			trx_commit_for_mysql(trx);
2702

2703 2704 2705 2706
			trx_free_for_mysql(trx);

			DBUG_RETURN(error);
      		}
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	}

	if (primary_key_no != -1) {
2710
		/* In InnoDB the clustered index must always be created
2711
		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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    			if ((error = create_index(trx, form, norm_name, i))) {
2727 2728 2729 2730 2731 2732 2733

				trx_commit_for_mysql(trx);

  				trx_free_for_mysql(trx);

				DBUG_RETURN(error);
      			}
2734
      		}
2735
  	}
2736

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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);
	}

2750 2751
  	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);

2758
	innobase_table = dict_table_get(norm_name, NULL);
2759 2760

	assert(innobase_table);
2761

2762
	/* Tell the InnoDB server that there might be work for
2763 2764 2765 2766 2767 2768 2769 2770 2771 2772
	utility threads: */

	srv_active_wake_master_thread();

  	trx_free_for_mysql(trx);

	DBUG_RETURN(0);
}

/*********************************************************************
2773
Drops a table from an InnoDB database. Before calling this function,
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2774 2775
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
2776 2777
operation inside InnoDB will remove all locks any user has on the table
inside InnoDB. */
2778 2779 2780 2781

int
ha_innobase::delete_table(
/*======================*/
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				/* out: error number */
	const char*	name)	/* in: table name */
2784 2785 2786 2787
{
	ulint	name_len;
	int	error;
	trx_t*	trx;
2788
	char	norm_name[1000];
2789

2790 2791 2792 2793 2794 2795 2796
  	DBUG_ENTER("ha_innobase::delete_table");

	trx = trx_allocate_for_mysql();

	name_len = strlen(name);

	assert(name_len < 1000);
2797

2798 2799
	/* Strangely, MySQL passes the table name without the '.frm'
	extension, in contrast to ::create */
2800

2801 2802
	normalize_table_name(norm_name, name);

2803
  	/* Drop the table in InnoDB */
2804

2805
  	error = row_drop_table_for_mysql(norm_name, trx, FALSE);
2806

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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);

2813
	/* Tell the InnoDB server that there might be work for
2814 2815 2816 2817
	utility threads: */

	srv_active_wake_master_thread();

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  	trx_commit_for_mysql(trx);

2820 2821 2822 2823 2824 2825 2826
  	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';
	
	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);

2868 2869 2870 2871 2872
	/* 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);
}

2881
/*************************************************************************
2882
Renames an InnoDB table. */
2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894

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;
2895 2896
	char	norm_from[1000];
	char	norm_to[1000];
2897

2898 2899 2900 2901 2902 2903 2904 2905 2906
  	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);
2907

2908 2909 2910
	normalize_table_name(norm_from, from);
	normalize_table_name(norm_to, to);

2911
  	/* Rename the table in InnoDB */
2912

2913
  	error = row_rename_table_for_mysql(norm_from, norm_to, trx);
2914

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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);

2921
	/* Tell the InnoDB server that there might be work for
2922 2923 2924 2925
	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 */
2943
	const mysql_byte*	start_key,	/* in: start key value of the
2944 2945 2946 2947 2948
						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' */
2949
	const mysql_byte*	end_key,	/* in: range end key val, may
2950 2951 2952 2953 2954 2955 2956 2957
						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;
2958 2959
	mysql_byte*	key_val_buff2 	= (mysql_byte*) my_malloc(
							table->reclength,
2960
								MYF(MY_WME));
2961
	dtuple_t*	range_start;
2962 2963 2964 2965
	dtuple_t*	range_end;
	ulint		n_rows;
	ulint		mode1;
	ulint		mode2;
2966 2967
	void*           heap1;
	void*           heap2;
2968

2969
   	DBUG_ENTER("records_in_range");
2970

2971 2972 2973 2974
	if (prebuilt->trx) {
		prebuilt->trx->op_info = "estimating range size";
	}
   	
2975 2976 2977
	active_index = keynr;

	key = table->key_info + active_index;
2978

2979
	index = dict_table_get_index_noninline(prebuilt->table, key->name);
2980

2981
	range_start = dtuple_create_for_mysql(&heap1, key->key_parts);
2982
 	dict_index_copy_types(range_start, index, key->key_parts);
2983

2984
	range_end = dtuple_create_for_mysql(&heap2, key->key_parts);
2985
 	dict_index_copy_types(range_end, index, key->key_parts);
2986

2987 2988 2989 2990
	row_sel_convert_mysql_key_to_innobase(
				range_start, (byte*) key_val_buff, index,
				(byte*) start_key,
				(ulint) start_key_len);
2991

2992 2993 2994 2995 2996
	row_sel_convert_mysql_key_to_innobase(
				range_end, (byte*) key_val_buff2, index,
				(byte*) end_key,
				(ulint) end_key_len);

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	mode1 = convert_search_mode_to_innobase(start_search_flag);
	mode2 = convert_search_mode_to_innobase(end_search_flag);

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	n_rows = btr_estimate_n_rows_in_range(index, range_start,
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						mode1, range_end, mode2);
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	dtuple_free_for_mysql(heap1);
	dtuple_free_for_mysql(heap2);
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    	my_free((char*) key_val_buff2, MYF(0));

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	if (prebuilt->trx) {
		prebuilt->trx->op_info = "";
	}
   	
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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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	if (prebuilt->trx) {
		prebuilt->trx->op_info =
				"estimating upper bound of table size";
	}   	

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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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	if (prebuilt->trx) {
		prebuilt->trx->op_info = "";
	}
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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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	/* In the following formula we assume that scanning 10 pages
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	takes the same time as a disk seek: */
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	return((double) (prebuilt->table->stat_clustered_index_size / 10));
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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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	if (prebuilt->trx) {
		prebuilt->trx->op_info = "calculating table stats";
	}
   	
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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]);
				}

				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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		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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	if (prebuilt->trx) {
		prebuilt->trx->op_info = "";
	}
   	
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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;
	
	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);
  	char*		str 	= my_malloc(length + 200, MYF(0));
  	char*		pos;
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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, 150, prebuilt->table);
  
  	return(str);
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}

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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 */
3331

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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 */