ha_innodb.cc 213 KB
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/* Copyright (C) 2000-2005 MySQL AB & Innobase 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
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
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   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
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   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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NOTE: You can only use noninlined InnoDB functions in this file, because we
have disables the InnoDB inlining in this file. */
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/* TODO list for the InnoDB handler in 5.0:
  - Remove the flag trx->active_trans and look at the InnoDB
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    trx struct state field
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  - fix savepoint functions to use savepoint storage area
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  - Find out what kind of problems the OS X case-insensitivity causes to
    table and database names; should we 'normalize' the names like we do
    in Windows?
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*/
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#ifdef USE_PRAGMA_IMPLEMENTATION
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#pragma implementation				// gcc: Class implementation
#endif

#include "mysql_priv.h"
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#include "slave.h"
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#include <m_ctype.h>
#include <hash.h>
#include <myisampack.h>
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#include <mysys_err.h>
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#include <my_sys.h>
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#define MAX_ULONG_BIT ((ulong) 1 << (sizeof(ulong)*8-1))

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#ifdef WITH_INNOBASE_STORAGE_ENGINE

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#include "ha_innodb.h"
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pthread_mutex_t innobase_share_mutex,	/* to protect innobase_open_files */
		prepare_commit_mutex;	/* to force correct commit order in
					binlog */
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ulong commit_threads= 0;
pthread_mutex_t commit_threads_m;
pthread_cond_t commit_cond;
pthread_mutex_t commit_cond_m;
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bool innodb_inited= 0;
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/*-----------------------------------------------------------------*/
/* These variables are used to implement (semi-)synchronous MySQL binlog
replication for InnoDB tables. */

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



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

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typedef byte	mysql_byte;
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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 "../storage/innobase/include/univ.i"
#include "../storage/innobase/include/os0file.h"
#include "../storage/innobase/include/os0thread.h"
#include "../storage/innobase/include/srv0start.h"
#include "../storage/innobase/include/srv0srv.h"
#include "../storage/innobase/include/trx0roll.h"
#include "../storage/innobase/include/trx0trx.h"
#include "../storage/innobase/include/trx0sys.h"
#include "../storage/innobase/include/mtr0mtr.h"
#include "../storage/innobase/include/row0ins.h"
#include "../storage/innobase/include/row0mysql.h"
#include "../storage/innobase/include/row0sel.h"
#include "../storage/innobase/include/row0upd.h"
#include "../storage/innobase/include/log0log.h"
#include "../storage/innobase/include/lock0lock.h"
#include "../storage/innobase/include/dict0crea.h"
#include "../storage/innobase/include/btr0cur.h"
#include "../storage/innobase/include/btr0btr.h"
#include "../storage/innobase/include/fsp0fsp.h"
#include "../storage/innobase/include/sync0sync.h"
#include "../storage/innobase/include/fil0fil.h"
#include "../storage/innobase/include/trx0xa.h"
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#include "../storage/innobase/include/thr0loc.h"
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#include "../storage/innobase/include/ha_prototypes.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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ulong	innobase_large_page_size = 0;
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/* The default values for the following, type long or longlong, start-up
parameters are declared in mysqld.cc: */
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long innobase_mirrored_log_groups, innobase_log_files_in_group,
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	innobase_log_buffer_size, innobase_buffer_pool_awe_mem_mb,
	innobase_additional_mem_pool_size, innobase_file_io_threads,
	innobase_lock_wait_timeout, innobase_force_recovery,
	innobase_open_files;
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longlong innobase_buffer_pool_size, innobase_log_file_size;
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/* The default values for the following char* start-up parameters
are determined in innobase_init below: */
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char*	innobase_data_home_dir			= NULL;
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char*	innobase_data_file_path			= NULL;
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char*	innobase_log_group_home_dir		= NULL;
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char*	innobase_log_arch_dir			= NULL;/* unused */
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/* The following has a misleading name: starting from 4.0.5, this also
affects Windows: */
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char*	innobase_unix_file_flush_method		= NULL;

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

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ulong	innobase_fast_shutdown			= 1;
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my_bool innobase_log_archive			= FALSE;/* unused */
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my_bool innobase_use_doublewrite		= TRUE;
my_bool innobase_use_checksums			= TRUE;
my_bool innobase_use_large_pages		= FALSE;
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my_bool	innobase_use_native_aio			= FALSE;
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my_bool	innobase_file_per_table			= FALSE;
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my_bool innobase_locks_unsafe_for_binlog	= FALSE;
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my_bool innobase_create_status_file		= FALSE;
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static char *internal_innobase_data_file_path	= NULL;
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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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static HASH	innobase_open_tables;
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#ifdef __NETWARE__	/* some special cleanup for NetWare */
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bool nw_panic = FALSE;
#endif

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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)));
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static INNOBASE_SHARE *get_share(const char *table_name);
static void free_share(INNOBASE_SHARE *share);
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static int innobase_close_connection(THD* thd);
static int innobase_commit(THD* thd, bool all);
static int innobase_rollback(THD* thd, bool all);
static int innobase_rollback_to_savepoint(THD* thd, void *savepoint);
static int innobase_savepoint(THD* thd, void *savepoint);
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static int innobase_release_savepoint(THD* thd, void *savepoint);
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static handler *innobase_create_handler(TABLE_SHARE *table,
                                        MEM_ROOT *mem_root);
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static const char innobase_hton_name[]= "InnoDB";
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handlerton innobase_hton;
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static handler *innobase_create_handler(TABLE_SHARE *table, MEM_ROOT *mem_root)
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{
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  return new (mem_root) ha_innobase(table);
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}


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

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

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SHOW_VAR innodb_status_variables[]= {
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  {"buffer_pool_pages_data",
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  (char*) &export_vars.innodb_buffer_pool_pages_data,	  SHOW_LONG},
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  {"buffer_pool_pages_dirty",
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  (char*) &export_vars.innodb_buffer_pool_pages_dirty,	  SHOW_LONG},
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  {"buffer_pool_pages_flushed",
  (char*) &export_vars.innodb_buffer_pool_pages_flushed,  SHOW_LONG},
  {"buffer_pool_pages_free",
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  (char*) &export_vars.innodb_buffer_pool_pages_free,	  SHOW_LONG},
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  {"buffer_pool_pages_latched",
  (char*) &export_vars.innodb_buffer_pool_pages_latched,  SHOW_LONG},
  {"buffer_pool_pages_misc",
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  (char*) &export_vars.innodb_buffer_pool_pages_misc,	  SHOW_LONG},
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  {"buffer_pool_pages_total",
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  (char*) &export_vars.innodb_buffer_pool_pages_total,	  SHOW_LONG},
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  {"buffer_pool_read_ahead_rnd",
  (char*) &export_vars.innodb_buffer_pool_read_ahead_rnd, SHOW_LONG},
  {"buffer_pool_read_ahead_seq",
  (char*) &export_vars.innodb_buffer_pool_read_ahead_seq, SHOW_LONG},
  {"buffer_pool_read_requests",
  (char*) &export_vars.innodb_buffer_pool_read_requests,  SHOW_LONG},
  {"buffer_pool_reads",
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  (char*) &export_vars.innodb_buffer_pool_reads,	  SHOW_LONG},
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  {"buffer_pool_wait_free",
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  (char*) &export_vars.innodb_buffer_pool_wait_free,	  SHOW_LONG},
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  {"buffer_pool_write_requests",
  (char*) &export_vars.innodb_buffer_pool_write_requests, SHOW_LONG},
  {"data_fsyncs",
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  (char*) &export_vars.innodb_data_fsyncs,		  SHOW_LONG},
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  {"data_pending_fsyncs",
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  (char*) &export_vars.innodb_data_pending_fsyncs,	  SHOW_LONG},
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  {"data_pending_reads",
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  (char*) &export_vars.innodb_data_pending_reads,	  SHOW_LONG},
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  {"data_pending_writes",
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  (char*) &export_vars.innodb_data_pending_writes,	  SHOW_LONG},
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  {"data_read",
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  (char*) &export_vars.innodb_data_read,		  SHOW_LONG},
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  {"data_reads",
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  (char*) &export_vars.innodb_data_reads,		  SHOW_LONG},
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  {"data_writes",
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  (char*) &export_vars.innodb_data_writes,		  SHOW_LONG},
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  {"data_written",
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  (char*) &export_vars.innodb_data_written,		  SHOW_LONG},
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  {"dblwr_pages_written",
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  (char*) &export_vars.innodb_dblwr_pages_written,	  SHOW_LONG},
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  {"dblwr_writes",
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  (char*) &export_vars.innodb_dblwr_writes,		  SHOW_LONG},
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  {"log_waits",
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  (char*) &export_vars.innodb_log_waits,		  SHOW_LONG},
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  {"log_write_requests",
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  (char*) &export_vars.innodb_log_write_requests,	  SHOW_LONG},
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  {"log_writes",
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  (char*) &export_vars.innodb_log_writes,		  SHOW_LONG},
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  {"os_log_fsyncs",
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  (char*) &export_vars.innodb_os_log_fsyncs,		  SHOW_LONG},
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  {"os_log_pending_fsyncs",
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  (char*) &export_vars.innodb_os_log_pending_fsyncs,	  SHOW_LONG},
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  {"os_log_pending_writes",
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  (char*) &export_vars.innodb_os_log_pending_writes,	  SHOW_LONG},
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  {"os_log_written",
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  (char*) &export_vars.innodb_os_log_written,		  SHOW_LONG},
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  {"page_size",
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  (char*) &export_vars.innodb_page_size,		  SHOW_LONG},
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  {"pages_created",
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  (char*) &export_vars.innodb_pages_created,		  SHOW_LONG},
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  {"pages_read",
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  (char*) &export_vars.innodb_pages_read,		  SHOW_LONG},
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  {"pages_written",
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  (char*) &export_vars.innodb_pages_written,		  SHOW_LONG},
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  {"row_lock_current_waits",
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  (char*) &export_vars.innodb_row_lock_current_waits,	  SHOW_LONG},
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  {"row_lock_time",
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  (char*) &export_vars.innodb_row_lock_time,		  SHOW_LONGLONG},
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  {"row_lock_time_avg",
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  (char*) &export_vars.innodb_row_lock_time_avg,	  SHOW_LONG},
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  {"row_lock_time_max",
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  (char*) &export_vars.innodb_row_lock_time_max,	  SHOW_LONG},
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  {"row_lock_waits",
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  (char*) &export_vars.innodb_row_lock_waits,		  SHOW_LONG},
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  {"rows_deleted",
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  (char*) &export_vars.innodb_rows_deleted,		  SHOW_LONG},
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  {"rows_inserted",
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  (char*) &export_vars.innodb_rows_inserted,		  SHOW_LONG},
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  {"rows_read",
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  (char*) &export_vars.innodb_rows_read,		  SHOW_LONG},
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  {"rows_updated",
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  (char*) &export_vars.innodb_rows_updated,		  SHOW_LONG},
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  {NullS, NullS, SHOW_LONG}};

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/* General functions */

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/**********************************************************************
Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
inline
void
innodb_srv_conc_enter_innodb(
/*=========================*/
	trx_t*	trx)	/* in: transaction handle */
{
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	if (UNIV_LIKELY(!srv_thread_concurrency)) {
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		return;
	}

	srv_conc_enter_innodb(trx);
}

/**********************************************************************
Save some CPU by testing the value of srv_thread_concurrency in inline
functions. */
inline
void
innodb_srv_conc_exit_innodb(
/*========================*/
	trx_t*	trx)	/* in: transaction handle */
{
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	if (UNIV_LIKELY(!srv_thread_concurrency)) {
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		return;
	}

	srv_conc_exit_innodb(trx);
}

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/**********************************************************************
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Releases possible search latch and InnoDB thread FIFO ticket. These should
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be released at each SQL statement end, and also when mysqld passes the
control to the client. It does no harm to release these also in the middle
of an SQL statement. */
inline
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void
innobase_release_stat_resources(
/*============================*/
	trx_t*	trx)	/* in: transaction object */
{
	if (trx->has_search_latch) {
		trx_search_latch_release_if_reserved(trx);
	}

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

		srv_conc_force_exit_innodb(trx);
	}
}

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/************************************************************************
Call this function when mysqld passes control to the client. That is to
avoid deadlocks on the adaptive hash S-latch possibly held by thd. For more
documentation, see handler.cc. */

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int
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innobase_release_temporary_latches(
/*===============================*/
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	THD *thd)
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{
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	trx_t*	trx;

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	if (!innodb_inited) {
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		return 0;
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	}

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

	if (trx) {
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		innobase_release_stat_resources(trx);
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	}
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	return 0;
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}

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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 and also tells to MySQL
about a possible transaction rollback inside InnoDB caused by a lock wait
timeout or a deadlock. */
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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 */
	THD*	thd)	/* in: user thread handle or NULL */
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{
	if (error == DB_SUCCESS) {

		return(0);

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	} else if (error == (int) DB_DUPLICATE_KEY) {
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		return(HA_ERR_FOUND_DUPP_KEY);
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	} else if (error == (int) DB_FOREIGN_DUPLICATE_KEY) {
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		return(HA_ERR_FOREIGN_DUPLICATE_KEY);

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	} else if (error == (int) DB_RECORD_NOT_FOUND) {
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		return(HA_ERR_NO_ACTIVE_RECORD);
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	} else if (error == (int) DB_ERROR) {
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		return(-1); /* unspecified error */
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	} else if (error == (int) DB_DEADLOCK) {
		/* Since we rolled back the whole transaction, we must
		tell it also to MySQL so that MySQL knows to empty the
		cached binlog for this transaction */
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		if (thd) {
			ha_rollback(thd);
		}
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		return(HA_ERR_LOCK_DEADLOCK);
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	} else if (error == (int) DB_LOCK_WAIT_TIMEOUT) {
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		/* Starting from 5.0.13, we let MySQL just roll back the
		latest SQL statement in a lock wait timeout. Previously, we
		rolled back the whole transaction. */
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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_CANNOT_DROP_CONSTRAINT) {
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		return(HA_ERR_ROW_IS_REFERENCED); /* TODO: This is a bit
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						misleading, a new MySQL error
						code should be introduced */
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	} else if (error == (int) DB_COL_APPEARS_TWICE_IN_INDEX) {
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		return(HA_ERR_CRASHED);
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	} else if (error == (int) DB_OUT_OF_FILE_SPACE) {
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		return(HA_ERR_RECORD_FILE_FULL);
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	} else if (error == (int) DB_TABLE_IS_BEING_USED) {
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		return(HA_ERR_WRONG_COMMAND);
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	} else if (error == (int) DB_TABLE_NOT_FOUND) {
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		return(HA_ERR_KEY_NOT_FOUND);
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	} else if (error == (int) DB_TOO_BIG_RECORD) {
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		return(HA_ERR_TO_BIG_ROW);
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	} else if (error == (int) DB_CORRUPTION) {
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		return(HA_ERR_CRASHED);
	} else if (error == (int) DB_NO_SAVEPOINT) {
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		return(HA_ERR_NO_SAVEPOINT);
	} else if (error == (int) DB_LOCK_TABLE_FULL) {
 		/* Since we rolled back the whole transaction, we must
 		tell it also to MySQL so that MySQL knows to empty the
 		cached binlog for this transaction */
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 		if (thd) {
 			ha_rollback(thd);
 		}
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    		return(HA_ERR_LOCK_TABLE_FULL);
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    	} else {
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    		return(-1);			// Unknown error
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    	}
}

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

/*****************************************************************
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Releases the mutex reserved by innobase_mysql_prepare_print_arbitrary_thd().
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NOTE that /mysql/innobase/lock/lock0lock.c must contain the prototype for this
function! */
extern "C"
void
innobase_mysql_end_print_arbitrary_thd(void)
/*========================================*/
{
	VOID(pthread_mutex_unlock(&LOCK_thread_count));
}

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/*****************************************************************
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Prints info of a THD object (== user session thread) to the given file.
NOTE that /mysql/innobase/trx/trx0trx.c must contain the prototype for
this function! */
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extern "C"
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void
innobase_mysql_print_thd(
/*=====================*/
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	FILE*	f,		/* in: output stream */
	void*	input_thd,	/* in: pointer to a MySQL THD object */
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	uint	max_query_len)	/* in: max query length to print, or 0 to
				   use the default max length */
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{
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	const THD*	thd;
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	const Security_context *sctx;
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	const char*	s;
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	thd = (const THD*) input_thd;
	/* We probably want to have original user as part of debug output. */
	sctx = &thd->main_security_ctx;
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	fprintf(f, "MySQL thread id %lu, query id %lu",
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		thd->thread_id, (ulong) thd->query_id);
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	if (sctx->host) {
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		putc(' ', f);
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		fputs(sctx->host, f);
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	}
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	if (sctx->ip) {
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		putc(' ', f);
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		fputs(sctx->ip, f);
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	}
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	if (sctx->user) {
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		putc(' ', f);
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		fputs(sctx->user, f);
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	}
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	if ((s = thd->proc_info)) {
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		putc(' ', f);
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		fputs(s, f);
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	}
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	if ((s = thd->query)) {
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		/* 3100 is chosen because currently 3000 is the maximum
		   max_query_len we ever give this. */
		char	buf[3100];
		uint	len;

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

		/* Points to buf or dyn_str. */
		char*	str = buf;
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		if (max_query_len == 0) {
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			/* ADDITIONAL SAFETY: the default is to print at
			   most 300 chars to reduce the probability of a
			   seg fault if there is a race in
			   thd->query_length in MySQL; after May 14, 2004
			   probably no race any more, but better be
			   safe */
			max_query_len = 300;
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		}
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		len = min(thd->query_length, max_query_len);
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		if (len > (sizeof(buf) - 1)) {
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			dyn_str = my_malloc(len + 1, MYF(0));
			str = dyn_str;
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		}
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		/* Use strmake to reduce the timeframe for a race,
		   compared to fwrite() */
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		len = (uint) (strmake(str, s, len) - str);
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		putc('\n', f);
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		fwrite(str, 1, len, f);

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		if (dyn_str) {
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			my_free(dyn_str, MYF(0));
		}
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	}
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	putc('\n', f);
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}

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/**********************************************************************
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Get the variable length bounds of the given character set.
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NOTE that the exact prototype of this function has to be in
/innobase/data/data0type.ic! */
extern "C"
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void
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innobase_get_cset_width(
/*====================*/
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	ulint	cset,		/* in: MySQL charset-collation code */
	ulint*	mbminlen,	/* out: minimum length of a char (in bytes) */
	ulint*	mbmaxlen)	/* out: maximum length of a char (in bytes) */
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{
	CHARSET_INFO*	cs;
	ut_ad(cset < 256);
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	ut_ad(mbminlen);
	ut_ad(mbmaxlen);
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	cs = all_charsets[cset];
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	if (cs) {
		*mbminlen = cs->mbminlen;
		*mbmaxlen = cs->mbmaxlen;
	} else {
		ut_a(cset == 0);
		*mbminlen = *mbmaxlen = 0;
	}
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}

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/**********************************************************************
Converts an identifier to a table name.

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

	strconvert(current_thd->charset(), from,
		   &my_charset_filename, to, len, &errors);
}

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

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

	strconvert(current_thd->charset(), from,
		   system_charset_info, to, len, &errors);
}

/**********************************************************************
Removes the filename encoding of a table or database name.

NOTE that the exact prototype of this function has to be in
/innobase/dict/dict0dict.c! */
extern "C"
void
innobase_convert_from_filename(
/*===========================*/
	char*		s)	/* in: identifier; out: decoded identifier */
{
	uint	errors;

	strconvert(&my_charset_filename, s,
		   system_charset_info, s, strlen(s), &errors);
}

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/**********************************************************************
Compares NUL-terminated UTF-8 strings case insensitively.

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

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

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

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/**************************************************************************
Determines the connection character set.

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

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/*************************************************************************
Creates a temporary file. */
extern "C"
int
innobase_mysql_tmpfile(void)
/*========================*/
			/* out: temporary file descriptor, or < 0 on error */
{
	char	filename[FN_REFLEN];
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	int	fd2 = -1;
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	File	fd = create_temp_file(filename, mysql_tmpdir, "ib",
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#ifdef __WIN__
				O_BINARY | O_TRUNC | O_SEQUENTIAL |
				O_TEMPORARY | O_SHORT_LIVED |
#endif /* __WIN__ */
				O_CREAT | O_EXCL | O_RDWR,
				MYF(MY_WME));
	if (fd >= 0) {
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#ifndef __WIN__
		/* On Windows, open files cannot be removed, but files can be
		created with the O_TEMPORARY flag to the same effect
		("delete on close"). */
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		unlink(filename);
#endif /* !__WIN__ */
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		/* Copy the file descriptor, so that the additional resources
		allocated by create_temp_file() can be freed by invoking
		my_close().

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

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/*************************************************************************
Wrapper around MySQL's copy_and_convert function, see it for
documentation. */
extern "C"
ulint
innobase_convert_string(
/*====================*/
	void*		to,
	ulint		to_length,
	CHARSET_INFO*	to_cs,
	const void*	from,
	ulint		from_length,
	CHARSET_INFO*	from_cs,
	uint*		errors)
{
	return(copy_and_convert((char*)to, to_length, to_cs,
		       (const char*)from, from_length, from_cs, errors));
}

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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(
/*=============*/
842
			/* out: InnoDB transaction handle */
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	THD*	thd)	/* in: user thread handle */
{
	trx_t*	trx;

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	ut_ad(thd == current_thd);
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	trx = (trx_t*) thd->ha_data[innobase_hton.slot];
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	if (trx == NULL) {
852
		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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		trx->mysql_query_str = &(thd->query);
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		trx->active_trans = 0;
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		/* Update the info whether we should skip XA steps that eat
		CPU time */
		trx->support_xa = (ibool)(thd->variables.innodb_support_xa);

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		thd->ha_data[innobase_hton.slot] = trx;
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	} else {
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		if (trx->magic_n != TRX_MAGIC_N) {
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			mem_analyze_corruption(trx);
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			ut_a(0);
		}
	}

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

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

	return(trx);
}

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

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ha_innobase::ha_innobase(TABLE_SHARE *table_arg)
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  :handler(&innobase_hton, table_arg),
  int_table_flags(HA_REC_NOT_IN_SEQ |
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		  HA_NULL_IN_KEY |
		  HA_CAN_INDEX_BLOBS |
		  HA_CAN_SQL_HANDLER |
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		  HA_PRIMARY_KEY_REQUIRED_FOR_POSITION |
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		  HA_PRIMARY_KEY_IN_READ_INDEX |
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		  HA_CAN_GEOMETRY | HA_PARTIAL_COLUMN_READ |
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		  HA_TABLE_SCAN_ON_INDEX),
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  start_of_scan(0),
  num_write_row(0)
{}

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/*************************************************************************
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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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/*************************************************************************
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Registers that InnoDB takes part in an SQL statement, so that MySQL knows to
roll back the statement if the statement results in an error. This MUST be
called for every SQL statement that may be rolled back by MySQL. Calling this
several times to register the same statement is allowed, too. */
inline
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void
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innobase_register_stmt(
/*===================*/
	THD*	thd)	/* in: MySQL thd (connection) object */
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{
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	/* Register the statement */
	trans_register_ha(thd, FALSE, &innobase_hton);
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}

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

	innobase_register_stmt(thd);
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	if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) {
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		/* No autocommit mode, register for a transaction */
		trans_register_ha(thd, TRUE, &innobase_hton);
	}
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}
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/*   BACKGROUND INFO: HOW THE MYSQL QUERY CACHE WORKS WITH INNODB
     ------------------------------------------------------------

1) The use of the query cache for TBL is disabled when there is an
uncommitted change to TBL.

2) When a change to TBL commits, InnoDB stores the current value of
its global trx id counter, let us denote it by INV_TRX_ID, to the table object
in the InnoDB data dictionary, and does only allow such transactions whose
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id <= INV_TRX_ID to use the query cache.
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3) When InnoDB does an INSERT/DELETE/UPDATE to a table TBL, or an implicit
modification because an ON DELETE CASCADE, we invalidate the MySQL query cache
of TBL immediately.

How this is implemented inside InnoDB:

1) Since every modification always sets an IX type table lock on the InnoDB
table, it is easy to check if there can be uncommitted modifications for a
table: just check if there are locks in the lock list of the table.

2) When a transaction inside InnoDB commits, it reads the global trx id
counter and stores the value INV_TRX_ID to the tables on which it had a lock.

3) If there is an implicit table change from ON DELETE CASCADE or SET NULL,
InnoDB calls an invalidate method for the MySQL query cache for that table.

How this is implemented inside sql_cache.cc:

1) The query cache for an InnoDB table TBL is invalidated immediately at an
INSERT/UPDATE/DELETE, just like in the case of MyISAM. No need to delay
invalidation to the transaction commit.

2) To store or retrieve a value from the query cache of an InnoDB table TBL,
any query must first ask InnoDB's permission. We must pass the thd as a
parameter because InnoDB will look at the trx id, if any, associated with
that thd.

3) Use of the query cache for InnoDB tables is now allowed also when
AUTOCOMMIT==0 or we are inside BEGIN ... COMMIT. Thus transactions no longer
put restrictions on the use of the query cache.
*/

/**********************************************************************
The MySQL query cache uses this to check from InnoDB if the query cache at
the moment is allowed to operate on an InnoDB table. The SQL query must
be a non-locking SELECT.

The query cache is allowed to operate on certain query only if this function
returns TRUE for all tables in the query.

If thd is not in the autocommit state, this function also starts a new
transaction for thd if there is no active trx yet, and assigns a consistent
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read view to it if there is no read view yet.

Why a deadlock of threads is not possible: the query cache calls this function
at the start of a SELECT processing. Then the calling thread cannot be
holding any InnoDB semaphores. The calling thread is holding the
query cache mutex, and this function will reserver the InnoDB kernel mutex.
Thus, the 'rank' in sync0sync.h of the MySQL query cache mutex is above
the InnoDB kernel mutex. */
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my_bool
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innobase_query_caching_of_table_permitted(
/*======================================*/
				/* out: TRUE if permitted, FALSE if not;
				note that the value FALSE does not mean
				we should invalidate the query cache:
				invalidation is called explicitly */
	THD*	thd,		/* in: thd of the user who is trying to
				store a result to the query cache or
				retrieve it */
	char*	full_name,	/* in: concatenation of database name,
				the null character '\0', and the table
				name */
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	uint	full_name_len,	/* in: length of the full name, i.e.
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				len(dbname) + len(tablename) + 1 */
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	ulonglong *unused)	/* unused for this engine */
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{
	ibool	is_autocommit;
	trx_t*	trx;
	char	norm_name[1000];

	ut_a(full_name_len < 999);

	if (thd->variables.tx_isolation == ISO_SERIALIZABLE) {
		/* In the SERIALIZABLE mode we add LOCK IN SHARE MODE to every
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		plain SELECT if AUTOCOMMIT is not on. */
1059

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		return((my_bool)FALSE);
	}

1063
	trx = check_trx_exists(thd);
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	if (trx->has_search_latch) {
		ut_print_timestamp(stderr);
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		sql_print_error("The calling thread is holding the adaptive "
				"search, latch though calling "
				"innobase_query_caching_of_table_permitted.");
1069 1070 1071 1072

		mutex_enter_noninline(&kernel_mutex);
		trx_print(stderr, trx, 1024);
		mutex_exit_noninline(&kernel_mutex);
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	}

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	innobase_release_stat_resources(trx);

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

		is_autocommit = TRUE;
	} else {
		is_autocommit = FALSE;

	}

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	if (is_autocommit && trx->n_mysql_tables_in_use == 0) {
		/* We are going to retrieve the query result from the query
		cache. This cannot be a store operation to the query cache
		because then MySQL would have locks on tables already.

		TODO: if the user has used LOCK TABLES to lock the table,
		then we open a transaction in the call of row_.. below.
		That trx can stay open until UNLOCK TABLES. The same problem
		exists even if we do not use the query cache. MySQL should be
		modified so that it ALWAYS calls some cleanup function when
		the processing of a query ends!

		We can imagine we instantaneously serialize this consistent
		read trx to the current trx id counter. If trx2 would have
		changed the tables of a query result stored in the cache, and
		trx2 would have already committed, making the result obsolete,
		then trx2 would have already invalidated the cache. Thus we
		can trust the result in the cache is ok for this query. */
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		return((my_bool)TRUE);
	}
1106

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	/* Normalize the table name to InnoDB format */

	memcpy(norm_name, full_name, full_name_len);

	norm_name[strlen(norm_name)] = '/'; /* InnoDB uses '/' as the
					    separator between db and table */
	norm_name[full_name_len] = '\0';
#ifdef __WIN__
1115
	innobase_casedn_str(norm_name);
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#endif
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	/* The call of row_search_.. will start a new transaction if it is
	not yet started */

1120
	if (trx->active_trans == 0) {
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		innobase_register_trx_and_stmt(thd);
		trx->active_trans = 1;
	}
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	if (row_search_check_if_query_cache_permitted(trx, norm_name)) {

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		/* printf("Query cache for %s permitted\n", norm_name); */
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		return((my_bool)TRUE);
	}

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	/* printf("Query cache for %s NOT permitted\n", norm_name); */
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	return((my_bool)FALSE);
}

/*********************************************************************
Invalidates the MySQL query cache for the table.
NOTE that the exact prototype of this function has to be in
/innobase/row/row0ins.c! */
1142
extern "C"
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void
innobase_invalidate_query_cache(
/*============================*/
	trx_t*	trx,		/* in: transaction which modifies the table */
	char*	full_name,	/* in: concatenation of database name, null
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				char '\0', table name, null char'\0';
				NOTE that in Windows this is always
				in LOWER CASE! */
	ulint	full_name_len)	/* in: full name length where also the null
				chars count */
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{
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	/* Note that the sync0sync.h rank of the query cache mutex is just
	above the InnoDB kernel mutex. The caller of this function must not
	have latches of a lower rank. */

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1158
	/* Argument TRUE below means we are using transactions */
1159
#ifdef HAVE_QUERY_CACHE
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	query_cache.invalidate((THD*)(trx->mysql_thd),
					(const char*)full_name,
					(uint32)full_name_len,
					TRUE);
1164
#endif
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}
1166 1167

/*********************************************************************
1168
Display an SQL identifier.
1169
This definition must match the one in innobase/ut/ut0ut.c! */
1170
extern "C"
1171 1172 1173 1174
void
innobase_print_identifier(
/*======================*/
	FILE*		f,	/* in: output stream */
1175
	trx_t*		trx,	/* in: transaction */
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	ibool		table_id,/* in: TRUE=print a table name,
				FALSE=print other identifier */
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	const char*	name,	/* in: name to print */
	ulint		namelen)/* in: length of name */
{
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	const char*	s	= name;
	char*		qname	= NULL;
	int		q;

	if (table_id) {
		/* Decode the table name.  The filename_to_tablename()
		function expects a NUL-terminated string.  The input and
		output strings buffers must not be shared.  The function
		only produces more output when the name contains other
		characters than [0-9A-Z_a-z]. */
		char*	temp_name = my_malloc(namelen + 1, MYF(MY_WME));
		uint	qnamelen = namelen
				+ (1 + sizeof srv_mysql50_table_name_prefix);

		if (temp_name) {
			qname = my_malloc(qnamelen, MYF(MY_WME));
			if (qname) {
				memcpy(temp_name, name, namelen);
				temp_name[namelen] = 0;
				s = qname;
				namelen = filename_to_tablename(temp_name,
						qname, qnamelen);
			}
			my_free(temp_name, MYF(0));
		}
	}

1208
	if (!trx || !trx->mysql_thd) {
1209 1210 1211 1212 1213

		q = '"';
	} else {
		q = get_quote_char_for_identifier((THD*) trx->mysql_thd,
						s, (int) namelen);
1214
	}
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231

	if (q == EOF) {
		fwrite(s, 1, namelen, f);
	} else {
		const char*	e = s + namelen;
		putc(q, f);
		while (s < e) {
			int	c = *s++;
			if (c == q) {
				putc(c, f);
			}
			putc(c, f);
		}
		putc(q, f);
	}

	my_free(qname, MYF(MY_ALLOW_ZERO_PTR));
1232 1233
}

1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
/**************************************************************************
Determines if the currently running transaction has been interrupted. */
extern "C"
ibool
trx_is_interrupted(
/*===============*/
			/* out: TRUE if interrupted */
	trx_t*	trx)	/* in: transaction */
{
	return(trx && trx->mysql_thd && ((THD*) trx->mysql_thd)->killed);
}

1246
/**************************************************************************
1247
Obtain a pointer to the MySQL THD object, as in current_thd().	This
1248 1249 1250 1251 1252 1253
definition must match the one in sql/ha_innodb.cc! */
extern "C"
void*
innobase_current_thd(void)
/*======================*/
			/* out: MySQL THD object */
1254
{
1255
	return(current_thd);
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}

1258 1259 1260 1261
/*********************************************************************
Call this when you have opened a new table handle in HANDLER, before you
call index_read_idx() etc. Actually, we can let the cursor stay open even
over a transaction commit! Then you should call this before every operation,
1262
fetch next etc. This function inits the necessary things even after a
1263 1264 1265 1266 1267 1268
transaction commit. */

void
ha_innobase::init_table_handle_for_HANDLER(void)
/*============================================*/
{
1269
	row_prebuilt_t* prebuilt;
1270

1271 1272 1273 1274
	/* If current thd does not yet have a trx struct, create one.
	If the current handle does not yet have a prebuilt struct, create
	one. Update the trx pointers in the prebuilt struct. Normally
	this operation is done in external_lock. */
1275

1276
	update_thd(current_thd);
1277

1278 1279
	/* Initialize the prebuilt struct much like it would be inited in
	external_lock */
1280

1281
	prebuilt = (row_prebuilt_t*)innobase_prebuilt;
1282

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	innobase_release_stat_resources(prebuilt->trx);

1285
	/* If the transaction is not started yet, start it */
1286

1287
	trx_start_if_not_started_noninline(prebuilt->trx);
1288

1289
	/* Assign a read view if the transaction does not have it yet */
1290

1291
	trx_assign_read_view(prebuilt->trx);
1292

1293 1294
	/* Set the MySQL flag to mark that there is an active transaction */

1295
	if (prebuilt->trx->active_trans == 0) {
1296

1297
		innobase_register_trx_and_stmt(current_thd);
1298

1299 1300
		prebuilt->trx->active_trans = 1;
	}
1301

1302 1303
	/* We did the necessary inits in this function, no need to repeat them
	in row_search_for_mysql */
1304

1305
	prebuilt->sql_stat_start = FALSE;
1306

1307 1308
	/* We let HANDLER always to do the reads as consistent reads, even
	if the trx isolation level would have been specified as SERIALIZABLE */
1309

1310 1311
	prebuilt->select_lock_type = LOCK_NONE;
	prebuilt->stored_select_lock_type = LOCK_NONE;
1312

1313
	/* Always fetch all columns in the index record */
1314

1315
	prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
1316

1317
	/* We want always to fetch all columns in the whole row? Or do
1318 1319
	we???? */

1320
	prebuilt->read_just_key = FALSE;
1321 1322

	prebuilt->used_in_HANDLER = TRUE;
1323 1324

	prebuilt->keep_other_fields_on_keyread = FALSE;
1325 1326
}

1327
/*************************************************************************
1328
Opens an InnoDB database. */
1329

1330
int
1331 1332 1333
innobase_init(void)
/*===============*/
{
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1334
	static char	current_dir[3];		/* Set if using current lib */
1335 1336
	int		err;
	bool		ret;
1337
	char		*default_path;
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merge  
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1338

1339
	DBUG_ENTER("innobase_init");
1340

1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365
        innobase_hton.state=have_innodb;
        innobase_hton.db_type= DB_TYPE_INNODB;
        innobase_hton.savepoint_offset=sizeof(trx_named_savept_t);
        innobase_hton.close_connection=innobase_close_connection;
        innobase_hton.savepoint_set=innobase_savepoint;
        innobase_hton.savepoint_rollback=innobase_rollback_to_savepoint;
        innobase_hton.savepoint_release=innobase_release_savepoint;
        innobase_hton.commit=innobase_commit;
        innobase_hton.rollback=innobase_rollback;
        innobase_hton.prepare=innobase_xa_prepare;
        innobase_hton.recover=innobase_xa_recover;
        innobase_hton.commit_by_xid=innobase_commit_by_xid;
        innobase_hton.rollback_by_xid=innobase_rollback_by_xid;
        innobase_hton.create_cursor_read_view=innobase_create_cursor_view;
        innobase_hton.set_cursor_read_view=innobase_set_cursor_view;
        innobase_hton.close_cursor_read_view=innobase_close_cursor_view;
        innobase_hton.create=innobase_create_handler;
        innobase_hton.drop_database=innobase_drop_database;
        innobase_hton.panic=innobase_end;
        innobase_hton.start_consistent_snapshot=innobase_start_trx_and_assign_read_view;
        innobase_hton.flush_logs=innobase_flush_logs;
        innobase_hton.show_status=innobase_show_status;
        innobase_hton.flags=HTON_NO_FLAGS;
        innobase_hton.release_temporary_latches=innobase_release_temporary_latches;

1366
	 if (have_innodb != SHOW_OPTION_YES)
1367
	   DBUG_RETURN(0); // nothing else to do
1368

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1369 1370
	ut_a(DATA_MYSQL_TRUE_VARCHAR == (ulint)MYSQL_TYPE_VARCHAR);

1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
#ifdef UNIV_DEBUG
	static const char	test_filename[] = "-@";
	char			test_tablename[sizeof test_filename
				+ sizeof srv_mysql50_table_name_prefix];
	if ((sizeof test_tablename) - 1
			!= filename_to_tablename(test_filename, test_tablename,
			sizeof test_tablename)
			|| strncmp(test_tablename,
			srv_mysql50_table_name_prefix,
			sizeof srv_mysql50_table_name_prefix)
			|| strcmp(test_tablename
			+ sizeof srv_mysql50_table_name_prefix,
			test_filename)) {
		sql_print_error("tablename encoding has been changed");
		goto error;
	}
#endif /* UNIV_DEBUG */

1389 1390 1391 1392 1393 1394 1395
	/* Check that values don't overflow on 32-bit systems. */
	if (sizeof(ulint) == 4) {
		if (innobase_buffer_pool_size > UINT_MAX32) {
			sql_print_error(
				"innobase_buffer_pool_size can't be over 4GB"
				" on 32-bit systems");

1396
			goto error;
1397 1398 1399 1400 1401 1402 1403
		}

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

1404
			goto error;
1405 1406 1407
		}
	}

1408
	os_innodb_umask = (ulint)my_umask;
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1409

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	/* First calculate the default path for innodb_data_home_dir etc.,
	in case the user has not given any value.

	Note that when using the embedded server, the datadirectory is not
	necessarily the current directory of this program. */

1416
	if (mysqld_embedded) {
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1417
		default_path = mysql_real_data_home;
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1418
		fil_path_to_mysql_datadir = mysql_real_data_home;
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1419
	} else {
1420 1421 1422 1423 1424
		/* It's better to use current lib, to keep paths short */
		current_dir[0] = FN_CURLIB;
		current_dir[1] = FN_LIBCHAR;
		current_dir[2] = 0;
		default_path = current_dir;
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1425 1426
	}

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1427 1428
	ut_a(default_path);

1429
	if (specialflag & SPECIAL_NO_PRIOR) {
1430
		srv_set_thread_priorities = FALSE;
1431
	} else {
1432 1433
		srv_set_thread_priorities = TRUE;
		srv_query_thread_priority = QUERY_PRIOR;
1434
	}
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1435

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1436 1437
	/* Set InnoDB initialization parameters according to the values
	read from MySQL .cnf file */
1438

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1439
	/*--------------- Data files -------------------------*/
1440

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1441
	/* The default dir for data files is the datadir of MySQL */
1442 1443

	srv_data_home = (innobase_data_home_dir ? innobase_data_home_dir :
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1444
			 default_path);
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1445

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1446
	/* Set default InnoDB data file size to 10 MB and let it be
1447
	auto-extending. Thus users can use InnoDB in >= 4.0 without having
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1448 1449 1450
	to specify any startup options. */

	if (!innobase_data_file_path) {
1451
		innobase_data_file_path = (char*) "ibdata1:10M:autoextend";
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1452 1453 1454 1455 1456 1457
	}

	/* Since InnoDB edits the argument in the next call, we make another
	copy of it: */

	internal_innobase_data_file_path = my_strdup(innobase_data_file_path,
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1458
						   MYF(MY_FAE));
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1459 1460 1461

	ret = (bool) srv_parse_data_file_paths_and_sizes(
				internal_innobase_data_file_path,
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1462 1463 1464 1465 1466 1467
				&srv_data_file_names,
				&srv_data_file_sizes,
				&srv_data_file_is_raw_partition,
				&srv_n_data_files,
				&srv_auto_extend_last_data_file,
				&srv_last_file_size_max);
1468
	if (ret == FALSE) {
1469
		sql_print_error(
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1470
			"InnoDB: syntax error in innodb_data_file_path");
1471
		my_free(internal_innobase_data_file_path,
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1472
						MYF(MY_ALLOW_ZERO_PTR));
1473
		goto error;
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1474
	}
1475

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

	/* The default dir for log files is the datadir of MySQL */
1479

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1480
	if (!innobase_log_group_home_dir) {
1481
		innobase_log_group_home_dir = default_path;
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	}
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1483

1484
#ifdef UNIV_LOG_ARCHIVE
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	/* Since innodb_log_arch_dir has no relevance under MySQL,
	starting from 4.0.6 we always set it the same as
	innodb_log_group_home_dir: */

	innobase_log_arch_dir = innobase_log_group_home_dir;

	srv_arch_dir = innobase_log_arch_dir;
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#endif /* UNIG_LOG_ARCHIVE */
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	ret = (bool)
		srv_parse_log_group_home_dirs(innobase_log_group_home_dir,
						&srv_log_group_home_dirs);
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1498
	if (ret == FALSE || innobase_mirrored_log_groups != 1) {
1499 1500
	  sql_print_error("syntax error in innodb_log_group_home_dir, or a "
			  "wrong number of mirrored log groups");
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1501

1502
		my_free(internal_innobase_data_file_path,
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1503
						MYF(MY_ALLOW_ZERO_PTR));
1504
		goto error;
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1505
	}
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	/* --------------------------------------------------*/

	srv_file_flush_method_str = innobase_unix_file_flush_method;
1510

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1511
	srv_n_log_groups = (ulint) innobase_mirrored_log_groups;
1512
	srv_n_log_files = (ulint) innobase_log_files_in_group;
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	srv_log_file_size = (ulint) innobase_log_file_size;

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1515
#ifdef UNIV_LOG_ARCHIVE
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	srv_log_archive_on = (ulint) innobase_log_archive;
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#endif /* UNIV_LOG_ARCHIVE */
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	srv_log_buffer_size = (ulint) innobase_log_buffer_size;
1519

1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538
	/* We set srv_pool_size here in units of 1 kB. InnoDB internally
	changes the value so that it becomes the number of database pages. */

	if (innobase_buffer_pool_awe_mem_mb == 0) {
		/* Careful here: we first convert the signed long int to ulint
		and only after that divide */

		srv_pool_size = ((ulint) innobase_buffer_pool_size) / 1024;
	} else {
		srv_use_awe = TRUE;
		srv_pool_size = (ulint)
				(1024 * innobase_buffer_pool_awe_mem_mb);
		srv_awe_window_size = (ulint) innobase_buffer_pool_size;

		/* Note that what the user specified as
		innodb_buffer_pool_size is actually the AWE memory window
		size in this case, and the real buffer pool size is
		determined by .._awe_mem_mb. */
	}
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1539

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	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;

	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
1543

1544
	srv_lock_wait_timeout = (ulint) innobase_lock_wait_timeout;
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1545 1546
	srv_force_recovery = (ulint) innobase_force_recovery;

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	srv_use_doublewrite_buf = (ibool) innobase_use_doublewrite;
	srv_use_checksums = (ibool) innobase_use_checksums;
1549

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	os_use_large_pages = (ibool) innobase_use_large_pages;
	os_large_page_size = (ulint) innobase_large_page_size;
1552

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	srv_file_per_table = (ibool) innobase_file_per_table;
1554
	srv_locks_unsafe_for_binlog = (ibool) innobase_locks_unsafe_for_binlog;
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	srv_max_n_open_files = (ulint) innobase_open_files;
1557
	srv_innodb_status = (ibool) innobase_create_status_file;
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1559
	srv_print_verbose_log = mysqld_embedded ? 0 : 1;
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	/* Store the default charset-collation number of this MySQL
1562
	installation */
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1564
	data_mysql_default_charset_coll = (ulint)default_charset_info->number;
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1566 1567
	ut_a(DATA_MYSQL_LATIN1_SWEDISH_CHARSET_COLL ==
					my_charset_latin1.number);
1568
	ut_a(DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number);
1569

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	/* Store the latin1_swedish_ci character ordering table to InnoDB. For
	non-latin1_swedish_ci charsets we use the MySQL comparison functions,
	and consequently we do not need to know the ordering internally in
	InnoDB. */
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1574

1575
	ut_a(0 == strcmp((char*)my_charset_latin1.name,
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1576 1577
						(char*)"latin1_swedish_ci"));
	memcpy(srv_latin1_ordering, my_charset_latin1.sort_order, 256);
1578

1579
	/* Since we in this module access directly the fields of a trx
1580
	struct, and due to different headers and flags it might happen that
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	mutex_t has a different size in this module and in InnoDB
	modules, we check at run time that the size is the same in
	these compilation modules. */

	srv_sizeof_trx_t_in_ha_innodb_cc = sizeof(trx_t);

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1587
	err = innobase_start_or_create_for_mysql();
1588 1589

	if (err != DB_SUCCESS) {
1590
		my_free(internal_innobase_data_file_path,
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						MYF(MY_ALLOW_ZERO_PTR));
1592
		goto error;
1593
	}
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	(void) hash_init(&innobase_open_tables,system_charset_info, 32, 0, 0,
1596 1597 1598 1599 1600 1601
					(hash_get_key) innobase_get_key, 0, 0);
	pthread_mutex_init(&innobase_share_mutex, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&prepare_commit_mutex, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&commit_threads_m, MY_MUTEX_INIT_FAST);
	pthread_mutex_init(&commit_cond_m, MY_MUTEX_INIT_FAST);
	pthread_cond_init(&commit_cond, NULL);
1602
	innodb_inited= 1;
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	/* If this is a replication slave and we needed to do a crash recovery,
	set the master binlog position to what InnoDB internally knew about
	how far we got transactions durable inside InnoDB. There is a
	problem here: if the user used also MyISAM tables, InnoDB might not
	know the right position for them.

	THIS DOES NOT WORK CURRENTLY because replication seems to initialize
	glob_mi also after innobase_init. */
1612

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1613 1614 1615 1616 1617 1618
/*	if (trx_sys_mysql_master_log_pos != -1) {
		ut_memcpy(glob_mi.log_file_name, trx_sys_mysql_master_log_name,
				1 + ut_strlen(trx_sys_mysql_master_log_name));
		glob_mi.pos = trx_sys_mysql_master_log_pos;
	}
*/
1619 1620
	DBUG_RETURN(FALSE);
error:
1621 1622
	have_innodb= SHOW_OPTION_DISABLED;	// If we couldn't use handler
	DBUG_RETURN(TRUE);
1623 1624 1625
}

/***********************************************************************
1626
Closes an InnoDB database. */
1627

1628 1629
int
innobase_end(ha_panic_function type)
1630
/*==============*/
1631
				/* out: TRUE if error */
1632
{
1633
	int	err= 0;
1634 1635 1636

	DBUG_ENTER("innobase_end");

1637
#ifdef __NETWARE__	/* some special cleanup for NetWare */
1638 1639 1640 1641
	if (nw_panic) {
		set_panic_flag_for_netware();
	}
#endif
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	if (innodb_inited) {
1643

1644 1645 1646 1647
		srv_fast_shutdown = (ulint) innobase_fast_shutdown;
		innodb_inited = 0;
		if (innobase_shutdown_for_mysql() != DB_SUCCESS) {
			err = 1;
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		}
1649 1650
		hash_free(&innobase_open_tables);
		my_free(internal_innobase_data_file_path,
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						MYF(MY_ALLOW_ZERO_PTR));
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		pthread_mutex_destroy(&innobase_share_mutex);
		pthread_mutex_destroy(&prepare_commit_mutex);
		pthread_mutex_destroy(&commit_threads_m);
		pthread_mutex_destroy(&commit_cond_m);
		pthread_cond_destroy(&commit_cond);
1657
	}
1658

1659
	DBUG_RETURN(err);
1660 1661 1662
}

/********************************************************************
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Flushes InnoDB logs to disk and makes a checkpoint. Really, a commit flushes
the logs, and the name of this function should be innobase_checkpoint. */
1665

1666
bool
1667 1668
innobase_flush_logs(void)
/*=====================*/
1669
				/* out: TRUE if error */
1670
{
1671
	bool	result = 0;
1672

1673
	DBUG_ENTER("innobase_flush_logs");
1674

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	log_buffer_flush_to_disk();
1676

1677
	DBUG_RETURN(result);
1678 1679 1680
}

/*********************************************************************
1681
Commits a transaction in an InnoDB database. */
1682

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void
innobase_commit_low(
/*================*/
	trx_t*	trx)	/* in: transaction handle */
{
1688
	if (trx->conc_state == TRX_NOT_STARTED) {
1689

1690 1691
		return;
	}
1692

1693
#ifdef HAVE_REPLICATION
1694
	THD *thd=current_thd;
1695

1696 1697
	if (thd && thd->slave_thread) {
		/* Update the replication position info inside InnoDB */
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1699 1700 1701 1702 1703
		trx->mysql_master_log_file_name
					= active_mi->rli.group_master_log_name;
		trx->mysql_master_log_pos = ((ib_longlong)
				active_mi->rli.future_group_master_log_pos);
	}
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#endif /* HAVE_REPLICATION */
1705

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	trx_commit_for_mysql(trx);
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}

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/*********************************************************************
Creates an InnoDB transaction struct for the thd if it does not yet have one.
Starts a new InnoDB transaction if a transaction is not yet started. And
assigns a new snapshot for a consistent read if the transaction does not yet
have one. */

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

1724
	DBUG_ENTER("innobase_start_trx_and_assign_read_view");
1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745

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

	trx = check_trx_exists(thd);

	/* This is just to play safe: release a possible FIFO ticket and
	search latch. Since we will reserve the kernel mutex, we have to
	release the search system latch first to obey the latching order. */

	innobase_release_stat_resources(trx);

	/* If the transaction is not started yet, start it */

	trx_start_if_not_started_noninline(trx);

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

	trx_assign_read_view(trx);

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

1746
	if (trx->active_trans == 0) {
1747

1748
		innobase_register_trx_and_stmt(current_thd);
1749

1750 1751
		trx->active_trans = 1;
	}
1752 1753 1754 1755

	DBUG_RETURN(0);
}

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/*********************************************************************
1757 1758
Commits a transaction in an InnoDB database or marks an SQL statement
ended. */
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static
int
1761 1762
innobase_commit(
/*============*/
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			/* out: 0 */
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	THD*	thd,	/* in: MySQL thread handle of the user for whom
1765
			the transaction should be committed */
1766 1767
	bool	all)	/* in:	TRUE - commit transaction
				FALSE - the current SQL statement ended */
1768
{
1769
	trx_t*		trx;
1770

1771 1772
	DBUG_ENTER("innobase_commit");
	DBUG_PRINT("trans", ("ending transaction"));
1773

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	trx = check_trx_exists(thd);
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1776 1777 1778
	/* Update the info whether we should skip XA steps that eat CPU time */
	trx->support_xa = (ibool)(thd->variables.innodb_support_xa);

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	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */
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1783 1784 1785 1786 1787
	if (trx->has_search_latch) {
			  trx_search_latch_release_if_reserved(trx);
	}

	/* The flag trx->active_trans is set to 1 in
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	1. ::external_lock(),
	2. ::start_stmt(),
1791
	3. innobase_query_caching_of_table_permitted(),
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	4. innobase_savepoint(),
1793
	5. ::init_table_handle_for_HANDLER(),
1794 1795
	6. innobase_start_trx_and_assign_read_view(),
	7. ::transactional_table_lock()
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	and it is only set to 0 in a commit or a rollback. If it is 0 we know
	there cannot be resources to be freed and we could return immediately.
	For the time being, we play safe and do the cleanup though there should
	be nothing to clean up. */
1801

1802 1803 1804 1805 1806
	if (trx->active_trans == 0
		&& trx->conc_state != TRX_NOT_STARTED) {

		sql_print_error("trx->active_trans == 0, but"
			" trx->conc_state != TRX_NOT_STARTED");
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1807
	}
1808 1809 1810 1811
	if (all
		|| (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {

		/* We were instructed to commit the whole transaction, or
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1812 1813
		this is an SQL statement end and autocommit is on */

1814 1815 1816
		/* We need current binlog position for ibbackup to work.
		Note, the position is current because of
		prepare_commit_mutex */
1817
retry:
1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
		if (srv_commit_concurrency > 0) {
			pthread_mutex_lock(&commit_cond_m);
			commit_threads++;

			if (commit_threads > srv_commit_concurrency) {
				commit_threads--;
				pthread_cond_wait(&commit_cond,
					&commit_cond_m);
				pthread_mutex_unlock(&commit_cond_m);
				goto retry;
			}
			else {
				pthread_mutex_unlock(&commit_cond_m);
			}
		}

		trx->mysql_log_file_name = mysql_bin_log.get_log_fname();
		trx->mysql_log_offset =
			(ib_longlong)mysql_bin_log.get_log_file()->pos_in_file;
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1837

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		innobase_commit_low(trx);
1839

1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853
		if (srv_commit_concurrency > 0) {
			pthread_mutex_lock(&commit_cond_m);
			commit_threads--;
			pthread_cond_signal(&commit_cond);
			pthread_mutex_unlock(&commit_cond_m);
		}

		if (trx->active_trans == 2) {

			pthread_mutex_unlock(&prepare_commit_mutex);
		}

		trx->active_trans = 0;

1854
	} else {
1855
		/* We just mark the SQL statement ended and do not do a
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1856 1857
		transaction commit */

1858 1859 1860
		if (trx->auto_inc_lock) {
			/* If we had reserved the auto-inc lock for some
			table in this SQL statement we release it now */
1861

1862 1863 1864 1865 1866 1867 1868
			row_unlock_table_autoinc_for_mysql(trx);
		}
		/* Store the current undo_no of the transaction so that we
		know where to roll back if we have to roll back the next
		SQL statement */

		trx_mark_sql_stat_end(trx);
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1869
	}
1870

1871 1872
	/* Tell the InnoDB server that there might be work for utility
	threads: */
1873 1874
	if (trx->declared_to_be_inside_innodb) {
			  /* Release our possible ticket in the FIFO */
1875

1876 1877
			  srv_conc_force_exit_innodb(trx);
	}
1878 1879
	srv_active_wake_master_thread();

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1880
	DBUG_RETURN(0);
1881 1882
}

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1883
/* TODO: put the
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1884 1885
MySQL-4.1 functionality back to 5.0. This is needed to get InnoDB Hot Backup
to work. */
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1887 1888 1889 1890
/*********************************************************************
This is called when MySQL writes the binlog entry for the current
transaction. Writes to the InnoDB tablespace info which tells where the
MySQL binlog entry for the current transaction ended. Also commits the
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1891
transaction inside InnoDB but does NOT flush InnoDB log files to disk.
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To flush you have to call innobase_commit_complete(). We have separated
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1893 1894
flushing to eliminate the bottleneck of LOCK_log in log.cc which disabled
InnoDB's group commit capability. */
1895 1896 1897 1898

int
innobase_report_binlog_offset_and_commit(
/*=====================================*/
1899 1900 1901 1902 1903 1904
				/* out: 0 */
	THD*	thd,		/* in: user thread */
	void*	trx_handle,	/* in: InnoDB trx handle */
	char*	log_file_name,	/* in: latest binlog file name */
	my_off_t end_offset)	/* in: the offset in the binlog file
				   up to which we wrote */
1905
{
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1906 1907 1908
	trx_t*	trx;

	trx = (trx_t*)trx_handle;
1909

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	ut_a(trx != NULL);

1912
	trx->mysql_log_file_name = log_file_name;
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	trx->mysql_log_offset = (ib_longlong)end_offset;
1914

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	trx->flush_log_later = TRUE;

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1917
	innobase_commit(thd, TRUE);
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	trx->flush_log_later = FALSE;

	return(0);
}

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#if 0
1925 1926 1927
/***********************************************************************
This function stores the binlog offset and flushes logs. */

1928
void
1929 1930
innobase_store_binlog_offset_and_flush_log(
/*=======================================*/
1931 1932
	char*		binlog_name,	/* in: binlog name */
	longlong	offset)		/* in: binlog offset */
1933 1934
{
	mtr_t mtr;
1935

1936 1937 1938
	assert(binlog_name != NULL);

	/* Start a mini-transaction */
1939
	mtr_start_noninline(&mtr);
1940 1941

	/* Update the latest MySQL binlog name and offset info
1942
	in trx sys header */
1943

1944 1945 1946 1947
	trx_sys_update_mysql_binlog_offset(
		binlog_name,
		offset,
		TRX_SYS_MYSQL_LOG_INFO, &mtr);
1948

1949 1950
	/* Commits the mini-transaction */
	mtr_commit(&mtr);
1951

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	/* Synchronous flush of the log buffer to disk */
1953 1954 1955 1956
	log_buffer_flush_to_disk();
}
#endif

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/*********************************************************************
This is called after MySQL has written the binlog entry for the current
transaction. Flushes the InnoDB log files to disk if required. */

int
innobase_commit_complete(
/*=====================*/
1964 1965
				/* out: 0 */
	THD*	thd)		/* in: user thread */
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{
	trx_t*	trx;

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	trx = (trx_t*) thd->ha_data[innobase_hton.slot];
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1971
	if (trx && trx->active_trans) {
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		trx->active_trans = 0;
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		if (UNIV_UNLIKELY(srv_flush_log_at_trx_commit == 0)) {
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1977 1978
			return(0);
		}
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		trx_commit_complete_for_mysql(trx);
	}
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	return(0);
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}

1986
/*********************************************************************
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1987
Rolls back a transaction or the latest SQL statement. */
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static int
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innobase_rollback(
/*==============*/
			/* out: 0 or error number */
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	THD*	thd,	/* in: handle to the MySQL thread of the user
1994
			whose transaction should be rolled back */
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	bool	all)	/* in:	TRUE - commit transaction
				FALSE - the current SQL statement ended */
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{
	int	error = 0;
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	trx_t*	trx;
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	DBUG_ENTER("innobase_rollback");
	DBUG_PRINT("trans", ("aborting transaction"));

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

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	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

2015
	if (trx->auto_inc_lock) {
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2016 2017 2018
		/* If we had reserved the auto-inc lock for some table (if
		we come here to roll back the latest SQL statement) we
		release it now before a possibly lengthy rollback */
2019

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		row_unlock_table_autoinc_for_mysql(trx);
	}

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	if (all
		|| (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {
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		error = trx_rollback_for_mysql(trx);
2027
		trx->active_trans = 0;
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	} else {
2029
		error = trx_rollback_last_sql_stat_for_mysql(trx);
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	}
2031

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	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

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/*********************************************************************
Rolls back a transaction */

int
innobase_rollback_trx(
/*==================*/
			/* out: 0 or error number */
	trx_t*	trx)	/*  in: transaction */
{
	int	error = 0;

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

	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

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	if (trx->auto_inc_lock) {
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		/* If we had reserved the auto-inc lock for some table (if
		we come here to roll back the latest SQL statement) we
		release it now before a possibly lengthy rollback */
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		row_unlock_table_autoinc_for_mysql(trx);
	}

	error = trx_rollback_for_mysql(trx);

	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

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/*********************************************************************
Rolls back a transaction to a savepoint. */

2071
static int
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innobase_rollback_to_savepoint(
/*===========================*/
				/* out: 0 if success, HA_ERR_NO_SAVEPOINT if
				no savepoint with the given name */
	THD*	thd,		/* in: handle to the MySQL thread of the user
				whose transaction should be rolled back */
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	void*	savepoint)	/* in: savepoint data */
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{
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	ib_longlong	mysql_binlog_cache_pos;
	int		error = 0;
	trx_t*		trx;
	char		name[64];
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	DBUG_ENTER("innobase_rollback_to_savepoint");

	trx = check_trx_exists(thd);

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	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */
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	innobase_release_stat_resources(trx);
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	/* TODO: use provided savepoint data area to store savepoint data */
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	longlong2str((ulint)savepoint, name, 36);
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	error = (int) trx_rollback_to_savepoint_for_mysql(trx, name,
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2100
						&mysql_binlog_cache_pos);
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	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
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}

2104 2105
/*********************************************************************
Release transaction savepoint name. */
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static
int
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innobase_release_savepoint(
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/*=======================*/
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				/* out: 0 if success, HA_ERR_NO_SAVEPOINT if
				no savepoint with the given name */
	THD*	thd,		/* in: handle to the MySQL thread of the user
				whose transaction should be rolled back */
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	void*	savepoint)	/* in: savepoint data */
2115
{
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	int		error = 0;
	trx_t*		trx;
	char		name[64];
2119

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2120
	DBUG_ENTER("innobase_release_savepoint");
2121 2122 2123

	trx = check_trx_exists(thd);

2124
	/* TODO: use provided savepoint data area to store savepoint data */
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2125

2126
	longlong2str((ulint)savepoint, name, 36);
2127

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	error = (int) trx_release_savepoint_for_mysql(trx, name);
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	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

2133
/*********************************************************************
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2134
Sets a transaction savepoint. */
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static
int
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innobase_savepoint(
/*===============*/
				/* out: always 0, that is, always succeeds */
	THD*	thd,		/* in: handle to the MySQL thread */
2141
	void*	savepoint)	/* in: savepoint data */
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{
	int	error = 0;
	trx_t*	trx;

	DBUG_ENTER("innobase_savepoint");

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	/*
	  In the autocommit mode there is no sense to set a savepoint
	  (unless we are in sub-statement), so SQL layer ensures that
	  this method is never called in such situation.
	*/
	DBUG_ASSERT(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) ||
		thd->in_sub_stmt);
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	trx = check_trx_exists(thd);

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	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

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	/* cannot happen outside of transaction */
	DBUG_ASSERT(trx->active_trans);
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	/* TODO: use provided savepoint data area to store savepoint data */
	char name[64];
	longlong2str((ulint)savepoint,name,36);
2170

2171
	error = (int) trx_savepoint_for_mysql(trx, name, (ib_longlong)0);
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	DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}

2176
/*********************************************************************
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Frees a possible InnoDB trx object associated with the current THD. */
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static
int
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innobase_close_connection(
/*======================*/
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			/* out: 0 or error number */
	THD*	thd)	/* in: handle to the MySQL thread of the user
2184
			whose resources should be free'd */
2185
{
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	trx_t*	trx;

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

	ut_a(trx);

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	if (trx->active_trans == 0
		&& trx->conc_state != TRX_NOT_STARTED) {

		sql_print_error("trx->active_trans == 0, but"
			" trx->conc_state != TRX_NOT_STARTED");
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	}

2199

2200
	if (trx->conc_state != TRX_NOT_STARTED &&
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		global_system_variables.log_warnings) {
		sql_print_warning(
			"MySQL is closing a connection that has an active "
			"InnoDB transaction.  %lu row modifications will "
			"roll back.",
			(ulong) trx->undo_no.low);
	}
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	innobase_rollback_trx(trx);

2211
	thr_local_free(trx->mysql_thread_id);
2212
	trx_free_for_mysql(trx);
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	return(0);
2215
}
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/*****************************************************************************
2219
** InnoDB database tables
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*****************************************************************************/

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/********************************************************************
Get the record format from the data dictionary. */
enum row_type
ha_innobase::get_row_type() const
/*=============================*/
			/* out: ROW_TYPE_REDUNDANT or ROW_TYPE_COMPACT */
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;

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

2242
/********************************************************************
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2243
Gives the file extension of an InnoDB single-table tablespace. */
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static const char* ha_innobase_exts[] = {
  ".ibd",
  NullS
};
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const char**
ha_innobase::bas_ext() const
/*========================*/
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				/* out: file extension string */
2253
{
2254
  return ha_innobase_exts;
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}

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/*********************************************************************
Normalizes a table name string. A normalized name consists of the
database name catenated to '/' and table name. An example:
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2261 2262
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 */

2277
	ptr = strend(name)-1;
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	while (ptr >= name && *ptr != '\\' && *ptr != '/') {
		ptr--;
	}

	name_ptr = ptr + 1;

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	DBUG_ASSERT(ptr > name);
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	ptr--;
2288

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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__
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	innobase_casedn_str(norm_name);
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#endif
2302
}
2303

2304
/*********************************************************************
2305
Creates and opens a handle to a table which already exists in an InnoDB
2306 2307 2308 2309 2310 2311 2312
database. */

int
ha_innobase::open(
/*==============*/
					/* out: 1 if error, 0 if success */
	const char*	name,		/* in: table name */
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	int		mode,		/* in: not used */
	uint		test_if_locked)	/* in: not used */
2315
{
2316
	dict_table_t*	ib_table;
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	char		norm_name[1000];
2318
	THD*		thd;
2319 2320 2321 2322 2323 2324

	DBUG_ENTER("ha_innobase::open");

	UT_NOT_USED(mode);
	UT_NOT_USED(test_if_locked);

2325
	thd = current_thd;
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	normalize_table_name(norm_name, name);

2328 2329
	user_thd = NULL;

2330 2331
	last_query_id = (ulong)-1;

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	if (!(share=get_share(name))) {

		DBUG_RETURN(1);
	}
2336

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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. */
2341

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	upd_and_key_val_buff_len =
				table->s->reclength + table->s->max_key_length
2344
							+ MAX_REF_PARTS * 3;
2345
	if (!(mysql_byte*) my_multi_malloc(MYF(MY_WME),
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			&upd_buff, upd_and_key_val_buff_len,
			&key_val_buff, upd_and_key_val_buff_len,
			NullS)) {
		free_share(share);
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		DBUG_RETURN(1);
	}
2353

2354
	/* Get pointer to a table object in InnoDB dictionary cache */
2355

2356
	ib_table = dict_table_get_and_increment_handle_count(norm_name);
2357 2358 2359

	if (NULL == ib_table) {
		ut_print_timestamp(stderr);
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		sql_print_error("Cannot find table %s from the internal data "
				"dictionary\nof InnoDB though the .frm file "
				"for the table exists. Maybe you\nhave "
				"deleted and recreated InnoDB data files but "
				"have forgotten\nto delete the corresponding "
				".frm files of InnoDB tables, or you\n"
				"have moved .frm files to another database?\n"
				"Look from section 15.1 of "
				"http://www.innodb.com/ibman.html\n"
				"how you can resolve the problem.\n",
				norm_name);
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		free_share(share);
		my_free((gptr) upd_buff, MYF(0));
		my_errno = ENOENT;
2374

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		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
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	if (ib_table->ibd_file_missing && !thd->tablespace_op) {
		ut_print_timestamp(stderr);
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		sql_print_error("MySQL is trying to open a table handle but "
				"the .ibd file for\ntable %s does not exist.\n"
				"Have you deleted the .ibd file from the "
				"database directory under\nthe MySQL datadir, "
				"or have you used DISCARD TABLESPACE?\n"
				"Look from section 15.1 of "
				"http://www.innodb.com/ibman.html\n"
				"how you can resolve the problem.\n",
				norm_name);
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		free_share(share);
		my_free((gptr) upd_buff, MYF(0));
		my_errno = ENOENT;
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		dict_table_decrement_handle_count(ib_table);
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		DBUG_RETURN(HA_ERR_NO_SUCH_TABLE);
	}
2396

2397
	innobase_prebuilt = row_create_prebuilt(ib_table);
2398

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	((row_prebuilt_t*)innobase_prebuilt)->mysql_row_len =
							table->s->reclength;
2401

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

2404
	primary_key = table->s->primary_key;
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	key_used_on_scan = primary_key;
2406

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	/* Allocate a buffer for a 'row reference'. A row reference is
	a string of bytes of length ref_length which uniquely specifies
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	a row in our table. Note that MySQL may also compare two row
	references for equality by doing a simple memcmp on the strings
	of length ref_length! */
2412

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	if (!row_table_got_default_clust_index(ib_table)) {
		if (primary_key >= MAX_KEY) {
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		  sql_print_error("Table %s has a primary key in InnoDB data "
				  "dictionary, but not in MySQL!", name);
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2417
		}
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		((row_prebuilt_t*)innobase_prebuilt)
				->clust_index_was_generated = FALSE;
2421
		/* MySQL allocates the buffer for ref. key_info->key_length
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		includes space for all key columns + one byte for each column
		that may be NULL. ref_length must be as exact as possible to
		save space, because all row reference buffers are allocated
		based on ref_length. */
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		ref_length = table->key_info[primary_key].key_length;
2428
	} else {
2429
		if (primary_key != MAX_KEY) {
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		  sql_print_error("Table %s has no primary key in InnoDB data "
				  "dictionary, but has one in MySQL! If you "
				  "created the table with a MySQL version < "
				  "3.23.54 and did not define a primary key, "
				  "but defined a unique key with all non-NULL "
				  "columns, then MySQL internally treats that "
				  "key as the primary key. You can fix this "
				  "error by dump + DROP + CREATE + reimport "
				  "of the table.", name);
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		}

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

2444
		ref_length = DATA_ROW_ID_LEN;
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		/* If we automatically created the clustered index, then
		MySQL does not know about it, and MySQL must NOT be aware
		of the index used on scan, to make it avoid checking if we
		update the column of the index. That is why we assert below
		that key_used_on_scan is the undefined value MAX_KEY.
		The column is the row id in the automatical generation case,
		and it will never be updated anyway. */
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		if (key_used_on_scan != MAX_KEY) {
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			sql_print_warning(
				"Table %s key_used_on_scan is %lu even "
				"though there is no primary key inside "
				"InnoDB.", name, (ulong) key_used_on_scan);
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		}
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	}
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	stats.block_size = 16 * 1024;	/* Index block size in InnoDB: used by MySQL
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				in query optimization */

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	/* Init table lock structure */
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	thr_lock_data_init(&share->lock,&lock,(void*) 0);
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	info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
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	DBUG_RETURN(0);
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}

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uint
ha_innobase::max_supported_key_part_length() const
{
	return(DICT_MAX_INDEX_COL_LEN - 1);
}

2479
/**********************************************************************
2480
Closes a handle to an InnoDB table. */
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int
ha_innobase::close(void)
/*====================*/
2485
				/* out: 0 */
2486
{
2487
	DBUG_ENTER("ha_innobase::close");
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	row_prebuilt_free((row_prebuilt_t*) innobase_prebuilt);

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	my_free((gptr) upd_buff, MYF(0));
	free_share(share);
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	/* Tell InnoDB server that there might be work for
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	utility threads: */

	srv_active_wake_master_thread();

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	DBUG_RETURN(0);
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}

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

/******************************************************************
Gets field offset for a field in a table. */
inline
uint
get_field_offset(
/*=============*/
			/* out: offset */
	TABLE*	table,	/* in: MySQL table object */
	Field*	field)	/* in: MySQL field object */
{
	return((uint) (field->ptr - (char*) table->record[0]));
}

/******************************************************************
Checks if a field in a record is SQL NULL. Uses the record format
information in table to track the null bit in record. */
inline
uint
field_in_record_is_null(
/*====================*/
			/* out: 1 if NULL, 0 otherwise */
	TABLE*	table,	/* in: MySQL table object */
	Field*	field,	/* in: MySQL field object */
	char*	record)	/* in: a row in MySQL format */
{
	int	null_offset;

	if (!field->null_ptr) {

		return(0);
	}

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

	if (record[null_offset] & field->null_bit) {

		return(1);
	}

	return(0);
}

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

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

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

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extern "C" {
/*****************************************************************
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InnoDB uses this function to compare two data fields for which the data type
is such that we must use MySQL code to compare them. NOTE that the prototype
of this function is in rem0cmp.c in InnoDB source code! If you change this
function, remember to update the prototype there! */
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int
innobase_mysql_cmp(
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/*===============*/
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					/* out: 1, 0, -1, if a is greater,
					equal, less than b, respectively */
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	int		mysql_type,	/* in: MySQL type */
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	uint		charset_number,	/* in: number of the charset */
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	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 */
{
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	CHARSET_INFO*		charset;
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	enum_field_types	mysql_tp;
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	int			ret;
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	DBUG_ASSERT(a_length != UNIV_SQL_NULL);
	DBUG_ASSERT(b_length != UNIV_SQL_NULL);
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	mysql_tp = (enum_field_types) mysql_type;

	switch (mysql_tp) {

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	case MYSQL_TYPE_BIT:
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	case MYSQL_TYPE_STRING:
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	case MYSQL_TYPE_VAR_STRING:
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	case FIELD_TYPE_TINY_BLOB:
	case FIELD_TYPE_MEDIUM_BLOB:
	case FIELD_TYPE_BLOB:
	case FIELD_TYPE_LONG_BLOB:
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	case MYSQL_TYPE_VARCHAR:
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		/* Use the charset number to pick the right charset struct for
		the comparison. Since the MySQL function get_charset may be
		slow before Bar removes the mutex operation there, we first
		look at 2 common charsets directly. */

		if (charset_number == default_charset_info->number) {
			charset = default_charset_info;
		} else if (charset_number == my_charset_latin1.number) {
			charset = &my_charset_latin1;
		} else {
			charset = get_charset(charset_number, MYF(MY_WME));

			if (charset == NULL) {
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			  sql_print_error("InnoDB needs charset %lu for doing "
					  "a comparison, but MySQL cannot "
					  "find that charset.",
					  (ulong) charset_number);
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				ut_a(0);
			}
		}

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		/* Starting from 4.1.3, we use strnncollsp() in comparisons of
		non-latin1_swedish_ci strings. NOTE that the collation order
		changes then: 'b\0\0...' is ordered BEFORE 'b  ...'. Users
		having indexes on such data need to rebuild their tables! */
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		ret = charset->coll->strnncollsp(charset,
				  a, a_length,
						 b, b_length, 0);
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		if (ret < 0) {
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			return(-1);
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		} else if (ret > 0) {
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			return(1);
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		} else {
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			return(0);
		}
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	default:
		assert(0);
	}

	return(0);
}
}

/******************************************************************
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Converts a MySQL type to an InnoDB type. Note that this function returns
the 'mtype' of InnoDB. InnoDB differentiates between MySQL's old <= 4.1
VARCHAR and the new true VARCHAR in >= 5.0.3 by the 'prtype'. */
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inline
ulint
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get_innobase_type_from_mysql_type(
/*==============================*/
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				/* out: DATA_BINARY, DATA_VARCHAR, ... */
	ulint*	unsigned_flag,	/* out: DATA_UNSIGNED if an 'unsigned type';
				at least ENUM and SET, and unsigned integer
				types are 'unsigned types' */
	Field*	field)		/* in: MySQL field */
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{
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	/* The following asserts try to check that the MySQL type code fits in
	8 bits: this is used in ibuf and also when DATA_NOT_NULL is ORed to
	the type */
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	DBUG_ASSERT((ulint)FIELD_TYPE_STRING < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_VAR_STRING < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_DOUBLE < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_FLOAT < 256);
	DBUG_ASSERT((ulint)FIELD_TYPE_DECIMAL < 256);

	if (field->flags & UNSIGNED_FLAG) {

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

	if (field->real_type() == FIELD_TYPE_ENUM
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		|| field->real_type() == FIELD_TYPE_SET) {
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		/* MySQL has field->type() a string type for these, but the
		data is actually internally stored as an unsigned integer
		code! */

		*unsigned_flag = DATA_UNSIGNED; /* MySQL has its own unsigned
						flag set to zero, even though
						internally this is an unsigned
						integer type */
		return(DATA_INT);
	}

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	switch (field->type()) {
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		/* NOTE that we only allow string types in DATA_MYSQL and
		DATA_VARMYSQL */
	case MYSQL_TYPE_VAR_STRING: /* old <= 4.1 VARCHAR */
	case MYSQL_TYPE_VARCHAR:    /* new >= 5.0.3 true VARCHAR */
		if (field->binary()) {
			return(DATA_BINARY);
		} else if (strcmp(
				   field->charset()->name,
				   "latin1_swedish_ci") == 0) {
			return(DATA_VARCHAR);
		} else {
			return(DATA_VARMYSQL);
		}
	case MYSQL_TYPE_BIT:
	case MYSQL_TYPE_STRING: if (field->binary()) {

			return(DATA_FIXBINARY);
		} else if (strcmp(
				   field->charset()->name,
				   "latin1_swedish_ci") == 0) {
			return(DATA_CHAR);
		} else {
			return(DATA_MYSQL);
		}
	case FIELD_TYPE_NEWDECIMAL:
		return(DATA_FIXBINARY);
	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_TIME:
	case FIELD_TYPE_TIMESTAMP:
		return(DATA_INT);
	case FIELD_TYPE_FLOAT:
		return(DATA_FLOAT);
	case FIELD_TYPE_DOUBLE:
		return(DATA_DOUBLE);
	case FIELD_TYPE_DECIMAL:
		return(DATA_DECIMAL);
	case FIELD_TYPE_GEOMETRY:
	case FIELD_TYPE_TINY_BLOB:
	case FIELD_TYPE_MEDIUM_BLOB:
	case FIELD_TYPE_BLOB:
	case FIELD_TYPE_LONG_BLOB:
		return(DATA_BLOB);
	default:
		assert(0);
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	}

	return(0);
}
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/***********************************************************************
Writes an unsigned integer value < 64k to 2 bytes, in the little-endian
storage format. */
inline
void
innobase_write_to_2_little_endian(
/*==============================*/
	byte*	buf,	/* in: where to store */
	ulint	val)	/* in: value to write, must be < 64k */
{
	ut_a(val < 256 * 256);

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

/***********************************************************************
Reads an unsigned integer value < 64k from 2 bytes, in the little-endian
storage format. */
inline
uint
innobase_read_from_2_little_endian(
/*===============================*/
			/* out: value */
	const mysql_byte*	buf)	/* in: from where to read */
{
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	return (uint) ((ulint)(buf[0]) + 256 * ((ulint)(buf[1])));
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}

2782
/***********************************************************************
2783
Stores a key value for a row to a buffer. */
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uint
ha_innobase::store_key_val_for_row(
/*===============================*/
				/* out: key value length as stored in buff */
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	uint		keynr,	/* in: key number */
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	char*		buff,	/* in/out: buffer for the key value (in MySQL
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				format) */
	uint		buff_len,/* in: buffer length */
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	const mysql_byte* record)/* in: row in MySQL format */
2794
{
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	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;
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	char*		buff_start	= buff;
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	enum_field_types mysql_type;
	Field*		field;
	ibool		is_null;
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	DBUG_ENTER("store_key_val_for_row");
2804

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	/* The format for storing a key field in MySQL is the following:

	1. If the column can be NULL, then in the first byte we put 1 if the
	field value is NULL, 0 otherwise.

	2. If the column is of a BLOB type (it must be a column prefix field
	in this case), then we put the length of the data in the field to the
	next 2 bytes, in the little-endian format. If the field is SQL NULL,
	then these 2 bytes are set to 0. Note that the length of data in the
	field is <= column prefix length.

	3. In a column prefix field, prefix_len next bytes are reserved for
	data. In a normal field the max field length next bytes are reserved
	for data. For a VARCHAR(n) the max field length is n. If the stored
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	value is the SQL NULL then these data bytes are set to 0.
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	4. We always use a 2 byte length for a true >= 5.0.3 VARCHAR. Note that
	in the MySQL row format, the length is stored in 1 or 2 bytes,
	depending on the maximum allowed length. But in the MySQL key value
	format, the length always takes 2 bytes.

	We have to zero-fill the buffer so that MySQL is able to use a
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	simple memcmp to compare two key values to determine if they are
	equal. MySQL does this to compare contents of two 'ref' values. */
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	bzero(buff, buff_len);
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	for (; key_part != end; key_part++) {
		is_null = FALSE;
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		if (key_part->null_bit) {
			if (record[key_part->null_offset]
2837
						& key_part->null_bit) {
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				*buff = 1;
				is_null = TRUE;
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			} else {
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				*buff = 0;
			}
			buff++;
2844
		}
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		field = key_part->field;
		mysql_type = field->type();

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		if (mysql_type == MYSQL_TYPE_VARCHAR) {
						/* >= 5.0.3 true VARCHAR */
			ulint	lenlen;
			ulint	len;
			byte*	data;
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			ulint	key_len;
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			ulint	true_len;
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			CHARSET_INFO*	cs;
			int	error=0;
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			key_len = key_part->length;

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			if (is_null) {
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				buff += key_len + 2;

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				continue;
			}
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			cs = field->charset();
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			lenlen = (ulint)
				(((Field_varstring*)field)->length_bytes);

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			data = row_mysql_read_true_varchar(&len,
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				(byte*) (record
				+ (ulint)get_field_offset(table, field)),
				lenlen);
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			true_len = len;

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

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

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			/* In a column prefix index, we may need to truncate
			the stored value: */
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			if (true_len > key_len) {
				true_len = key_len;
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			}

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

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			row_mysql_store_true_var_len((byte*)buff, true_len, 2);
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			buff += 2;

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			memcpy(buff, data, true_len);
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			/* Note that we always reserve the maximum possible
			length of the true VARCHAR in the key value, though
			only len first bytes after the 2 length bytes contain
			actual data. The rest of the space was reset to zero
			in the bzero() call above. */

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			buff += key_len;
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		} else if (mysql_type == FIELD_TYPE_TINY_BLOB
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			|| mysql_type == FIELD_TYPE_MEDIUM_BLOB
			|| mysql_type == FIELD_TYPE_BLOB
			|| mysql_type == FIELD_TYPE_LONG_BLOB) {
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			CHARSET_INFO*	cs;
			ulint		key_len;
			ulint		len;
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			ulint		true_len;
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			int		error=0;
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			ulint		blob_len;
			byte*		blob_data;
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			ut_a(key_part->key_part_flag & HA_PART_KEY_SEG);
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			key_len = key_part->length;

			if (is_null) {
				buff += key_len + 2;

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				continue;
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			}
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			cs = field->charset();

			blob_data = row_mysql_read_blob_ref(&blob_len,
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				(byte*) (record
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				+ (ulint)get_field_offset(table, field)),
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					(ulint) field->pack_length());

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			true_len = blob_len;

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			ut_a(get_field_offset(table, field)
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				== key_part->offset);

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

			if (blob_len > 0 && cs->mbmaxlen > 1) {
				true_len = (ulint) cs->cset->well_formed_len(cs,
						(const char *) blob_data,
						(const char *) blob_data
							+ blob_len,
						key_len / cs->mbmaxlen,
						&error);
			}
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			/* All indexes on BLOB and TEXT are column prefix
			indexes, and we may need to truncate the data to be
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			stored in the key value: */
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2962

2963 2964
			if (true_len > key_len) {
				true_len = key_len;
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2965 2966 2967 2968 2969
			}

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

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2970
			innobase_write_to_2_little_endian(
2971
					(byte*)buff, true_len);
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2972 2973
			buff += 2;

2974
			memcpy(buff, blob_data, true_len);
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2975

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2976 2977 2978
			/* Note that we always reserve the maximum possible
			length of the BLOB prefix in the key value. */

2979
			buff += key_len;
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2980
		} else {
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2981 2982 2983 2984 2985
			/* Here we handle all other data types except the
			true VARCHAR, BLOB and TEXT. Note that the column
			value we store may be also in a column prefix
			index. */

2986
			CHARSET_INFO*		cs;
2987 2988
			ulint			true_len;
			ulint			key_len;
2989 2990
			const mysql_byte*	src_start;
			int			error=0;
2991 2992 2993 2994 2995 2996
			enum_field_types	real_type;

			key_len = key_part->length;

			if (is_null) {
				 buff += key_len;
2997

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2998 2999
				 continue;
			}
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3000

3001
			src_start = record + key_part->offset;
3002 3003
			real_type = field->real_type();
			true_len = key_len;
3004

3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029
			/* Character set for the field is defined only
			to fields whose type is string and real field
			type is not enum or set. For these fields check
			if character set is multi byte. */

			if (real_type != FIELD_TYPE_ENUM
				&& real_type != FIELD_TYPE_SET
				&& ( mysql_type == MYSQL_TYPE_VAR_STRING
					|| mysql_type == MYSQL_TYPE_STRING)) {

				cs = field->charset();

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

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

					true_len = (ulint)
						cs->cset->well_formed_len(cs,
							(const char *)src_start,
							(const char *)src_start
								+ key_len,
							key_len / cs->mbmaxlen,
							&error);
				}
3030 3031
			}

3032 3033
			memcpy(buff, src_start, true_len);
			buff += true_len;
3034

3035 3036 3037
			/* Pad the unused space with spaces. Note that no
			padding is ever needed for UCS-2 because in MySQL,
			all UCS2 characters are 2 bytes, as MySQL does not
3038 3039
			support surrogate pairs, which are needed to represent
			characters in the range U+10000 to U+10FFFF. */
3040

3041 3042 3043 3044
			if (true_len < key_len) {
				ulint pad_len = key_len - true_len;
				memset(buff, ' ', pad_len);
				buff += pad_len;
3045
			}
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3046
		}
3047
	}
3048

3049
	ut_a(buff <= buff_start + buff_len);
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3050 3051

	DBUG_RETURN((uint)(buff - buff_start));
3052 3053 3054
}

/******************************************************************
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3055 3056
Builds a 'template' to the prebuilt struct. The template is used in fast
retrieval of just those column values MySQL needs in its processing. */
3057
void
3058
ha_innobase::build_template(
3059 3060 3061 3062 3063 3064
/*===========*/
	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 */
3065
	uint		templ_type)	/* in: ROW_MYSQL_WHOLE_ROW or
3066
					ROW_MYSQL_REC_FIELDS */
3067
{
3068 3069
	dict_index_t*	index;
	dict_index_t*	clust_index;
3070
	mysql_row_templ_t* templ;
3071
	Field*		field;
3072 3073
	ulint		n_fields;
	ulint		n_requested_fields	= 0;
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3074
	ibool		fetch_all_in_key	= FALSE;
3075
	ibool		fetch_primary_key_cols	= FALSE;
3076
	ulint		i;
3077 3078
	/* byte offset of the end of last requested column */
	ulint		mysql_prefix_len	= 0;
3079

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3080 3081 3082 3083
	if (prebuilt->select_lock_type == LOCK_X) {
		/* We always retrieve the whole clustered index record if we
		use exclusive row level locks, for example, if the read is
		done in an UPDATE statement. */
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3084

3085
		templ_type = ROW_MYSQL_WHOLE_ROW;
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3086 3087
	}

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3088
	if (templ_type == ROW_MYSQL_REC_FIELDS) {
3089 3090
		if (prebuilt->hint_need_to_fetch_extra_cols
			== ROW_RETRIEVE_ALL_COLS) {
3091

3092 3093
			/* We know we must at least fetch all columns in the
			key, or all columns in the table */
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3094

3095 3096 3097 3098 3099 3100 3101
			if (prebuilt->read_just_key) {
				/* MySQL has instructed us that it is enough
				to fetch the columns in the key; looks like
				MySQL can set this flag also when there is
				only a prefix of the column in the key: in
				that case we retrieve the whole column from
				the clustered index */
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3102

3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116
				fetch_all_in_key = TRUE;
			} else {
				templ_type = ROW_MYSQL_WHOLE_ROW;
			}
		} else if (prebuilt->hint_need_to_fetch_extra_cols
			== ROW_RETRIEVE_PRIMARY_KEY) {
			/* We must at least fetch all primary key cols. Note
			   that if the clustered index was internally generated
			   by InnoDB on the row id (no primary key was
			   defined), then row_search_for_mysql() will always
			   retrieve the row id to a special buffer in the
			   prebuilt struct. */

			fetch_primary_key_cols = TRUE;
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3117
		}
3118 3119
	}

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3120
	clust_index = dict_table_get_first_index_noninline(prebuilt->table);
3121

3122
	if (templ_type == ROW_MYSQL_REC_FIELDS) {
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3123
		index = prebuilt->index;
3124 3125
	} else {
		index = clust_index;
3126
	}
3127

3128 3129 3130 3131 3132 3133 3134
	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 */
	}
3135

3136
	n_fields = (ulint)table->s->fields; /* number of columns */
3137 3138 3139 3140 3141 3142

	if (!prebuilt->mysql_template) {
		prebuilt->mysql_template = (mysql_row_templ_t*)
						mem_alloc_noninline(
					n_fields * sizeof(mysql_row_templ_t));
	}
3143

3144
	prebuilt->template_type = templ_type;
3145
	prebuilt->null_bitmap_len = table->s->null_bytes;
3146

3147 3148
	prebuilt->templ_contains_blob = FALSE;

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3149 3150
	/* Note that in InnoDB, i is the column number. MySQL calls columns
	'fields'. */
3151
	for (i = 0; i < n_fields; i++) {
3152
		templ = prebuilt->mysql_template + n_requested_fields;
3153 3154
		field = table->field[i];

3155 3156 3157 3158 3159
		if (UNIV_LIKELY(templ_type == ROW_MYSQL_REC_FIELDS)) {
			/* Decide which columns we should fetch
			and which we can skip. */
			register const ibool	index_contains_field =
				dict_index_contains_col_or_prefix(index, i);
3160

3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173
			if (!index_contains_field && prebuilt->read_just_key) {
				/* If this is a 'key read', we do not need
				columns that are not in the key */

				goto skip_field;
			}

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

				goto include_field;
			}

3174 3175
                        if (bitmap_is_set(table->read_set, i) ||
                            bitmap_is_set(table->write_set, i)) {
3176 3177 3178 3179
				/* This field is needed in the query */

				goto include_field;
			}
3180

3181
			if (fetch_primary_key_cols
3182 3183
				&& dict_table_col_in_clustered_key(
					index->table, i)) {
3184 3185 3186 3187
				/* This field is needed in the query */

				goto include_field;
			}
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3188 3189

			/* This field is not needed in the query, skip it */
3190 3191 3192

			goto skip_field;
		}
3193
include_field:
3194
		n_requested_fields++;
3195

3196
		templ->col_no = i;
3197

3198 3199 3200
		if (index == clust_index) {
			templ->rec_field_no = (index->table->cols + i)
								->clust_pos;
3201
		} else {
3202 3203
			templ->rec_field_no = dict_index_get_nth_col_pos(
								index, i);
3204 3205
		}

3206 3207 3208 3209 3210 3211 3212 3213
		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]);
3214

3215 3216 3217 3218
			templ->mysql_null_bit_mask = (ulint) field->null_bit;
		} else {
			templ->mysql_null_bit_mask = 0;
		}
3219

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3220 3221 3222
		templ->mysql_col_offset = (ulint)
					get_field_offset(table, field);

3223
		templ->mysql_col_len = (ulint) field->pack_length();
3224 3225 3226 3227 3228
		if (mysql_prefix_len < templ->mysql_col_offset
				+ templ->mysql_col_len) {
			mysql_prefix_len = templ->mysql_col_offset
				+ templ->mysql_col_len;
		}
3229
		templ->type = index->table->cols[i].type.mtype;
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3230 3231 3232 3233
		templ->mysql_type = (ulint)field->type();

		if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR) {
			templ->mysql_length_bytes = (ulint)
3234
				(((Field_varstring*)field)->length_bytes);
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3235
		}
3236

3237 3238
		templ->charset = dtype_get_charset_coll_noninline(
				index->table->cols[i].type.prtype);
3239 3240
		templ->mbminlen = index->table->cols[i].type.mbminlen;
		templ->mbmaxlen = index->table->cols[i].type.mbmaxlen;
3241 3242
		templ->is_unsigned = index->table->cols[i].type.prtype
							& DATA_UNSIGNED;
3243 3244
		if (templ->type == DATA_BLOB) {
			prebuilt->templ_contains_blob = TRUE;
3245
		}
3246 3247 3248
skip_field:
		;
	}
3249

3250
	prebuilt->n_template = n_requested_fields;
3251
	prebuilt->mysql_prefix_len = mysql_prefix_len;
3252

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3253
	if (index != clust_index && prebuilt->need_to_access_clustered) {
3254 3255 3256 3257
		/* 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;
3258

3259
			templ->rec_field_no =
3260
				(index->table->cols + templ->col_no)->clust_pos;
3261
		}
3262
	}
3263 3264 3265
}

/************************************************************************
3266
Stores a row in an InnoDB database, to the table specified in this
3267 3268 3269 3270 3271
handle. */

int
ha_innobase::write_row(
/*===================*/
3272
				/* out: error code */
3273
	mysql_byte*	record)	/* in: a row in MySQL format */
3274
{
3275
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
3276
	int		error;
3277
	longlong	auto_inc;
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3278
	longlong	dummy;
3279
	ibool		auto_inc_used= FALSE;
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monty@hundin.mysql.fi committed
3280

3281
	DBUG_ENTER("ha_innobase::write_row");
3282

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heikki@hundin.mysql.fi committed
3283
	if (prebuilt->trx !=
3284
			(trx_t*) current_thd->ha_data[innobase_hton.slot]) {
3285 3286 3287 3288
	  sql_print_error("The transaction object for the table handle is at "
			  "%p, but for the current thread it is at %p",
			  prebuilt->trx,
			  (trx_t*) current_thd->ha_data[innobase_hton.slot]);
3289

3290 3291 3292 3293 3294 3295
		fputs("InnoDB: Dump of 200 bytes around prebuilt: ", stderr);
		ut_print_buf(stderr, ((const byte*)prebuilt) - 100, 200);
		fputs("\n"
			"InnoDB: Dump of 200 bytes around transaction.all: ",
			stderr);
		ut_print_buf(stderr,
3296
		 ((byte*)(&(current_thd->ha_data[innobase_hton.slot]))) - 100,
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heikki@hundin.mysql.fi committed
3297
								200);
3298 3299
		putc('\n', stderr);
		ut_error;
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3300
	}
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heikki@hundin.mysql.fi committed
3301

3302 3303
	statistic_increment(current_thd->status_var.ha_write_count,
		&LOCK_status);
3304

3305 3306
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
		table->timestamp_field->set_time();
3307

3308
	if ((user_thd->lex->sql_command == SQLCOM_ALTER_TABLE
3309 3310 3311 3312
			|| user_thd->lex->sql_command == SQLCOM_OPTIMIZE
			|| user_thd->lex->sql_command == SQLCOM_CREATE_INDEX
			|| user_thd->lex->sql_command == SQLCOM_DROP_INDEX)
		&& num_write_row >= 10000) {
3313 3314 3315 3316 3317 3318 3319 3320
		/* ALTER TABLE is COMMITted at every 10000 copied rows.
		The IX table lock for the original table has to be re-issued.
		As this method will be called on a temporary table where the
		contents of the original table is being copied to, it is
		a bit tricky to determine the source table.  The cursor
		position in the source table need not be adjusted after the
		intermediate COMMIT, since writes by other transactions are
		being blocked by a MySQL table lock TL_WRITE_ALLOW_READ. */
3321

3322
		dict_table_t*	src_table;
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marko@hundin.mysql.fi committed
3323
		ulint		mode;
3324

3325
		num_write_row = 0;
3326

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marko@hundin.mysql.fi committed
3327 3328
		/* Commit the transaction.  This will release the table
		locks, so they have to be acquired again. */
3329 3330 3331 3332 3333 3334

		/* Altering an InnoDB table */
		/* Get the source table. */
		src_table = lock_get_src_table(
				prebuilt->trx, prebuilt->table, &mode);
		if (!src_table) {
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heikki@hundin.mysql.fi committed
3335
no_commit:
3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348
			/* Unknown situation: do not commit */
			/*
			ut_print_timestamp(stderr);
			fprintf(stderr,
				"  InnoDB error: ALTER TABLE is holding lock"
				" on %lu tables!\n",
				prebuilt->trx->mysql_n_tables_locked);
			*/
			;
		} else if (src_table == prebuilt->table) {
			/* Source table is not in InnoDB format:
			no need to re-acquire locks on it. */

3349
			/* Altering to InnoDB format */
3350
			innobase_commit(user_thd, 1);
3351
			/* Note that this transaction is still active. */
3352
			prebuilt->trx->active_trans = 1;
3353
			/* We will need an IX lock on the destination table. */
3354
			prebuilt->sql_stat_start = TRUE;
3355 3356 3357
		} else {
			/* Ensure that there are no other table locks than
			LOCK_IX and LOCK_AUTO_INC on the destination table. */
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heikki@hundin.mysql.fi committed
3358

3359 3360
			if (!lock_is_table_exclusive(prebuilt->table,
							prebuilt->trx)) {
3361 3362 3363 3364 3365
				goto no_commit;
			}

			/* Commit the transaction.  This will release the table
			locks, so they have to be acquired again. */
3366
			innobase_commit(user_thd, 1);
3367
			/* Note that this transaction is still active. */
3368
			prebuilt->trx->active_trans = 1;
3369
			/* Re-acquire the table lock on the source table. */
3370
			row_lock_table_for_mysql(prebuilt, src_table, mode);
3371
			/* We will need an IX lock on the destination table. */
3372
			prebuilt->sql_stat_start = TRUE;
3373
		}
3374 3375
	}

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3376 3377
	num_write_row++;

3378
	if (last_query_id != user_thd->query_id) {
3379 3380
		prebuilt->sql_stat_start = TRUE;
		last_query_id = user_thd->query_id;
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heikki@donna.mysql.fi committed
3381 3382

		innobase_release_stat_resources(prebuilt->trx);
3383 3384
	}

3385
	if (table->next_number_field && record == table->record[0]) {
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3386 3387
		/* This is the case where the table has an
		auto-increment column */
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3388 3389 3390 3391 3392 3393 3394

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

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

			/* This call initializes the counter */
3395
			error = innobase_read_and_init_auto_inc(&dummy);
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3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412

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

				goto func_exit;
			}

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

			prebuilt->sql_stat_start = TRUE;
		}

3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430
		/* We have to use the transactional lock mechanism on the
		auto-inc counter of the table to ensure that replication and
		roll-forward of the binlog exactly imitates also the given
		auto-inc values. The lock is released at each SQL statement's
		end. This lock also prevents a race where two threads would
		call ::get_auto_increment() simultaneously. */

		error = row_lock_table_autoinc_for_mysql(prebuilt);

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

			error = convert_error_code_to_mysql(error, user_thd);

			goto func_exit;
		}

		/* We must use the handler code to update the auto-increment
3431
		value to be sure that we increment it correctly. */
3432

3433 3434
		update_auto_increment();
		auto_inc_used = 1;
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monty@hundin.mysql.fi committed
3435

3436
	}
3437

3438 3439 3440 3441
	if (prebuilt->mysql_template == NULL
			|| prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) {
		/* Build the template used in converting quickly between
		the two database formats */
3442

3443 3444
		build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
	}
3445

3446
	innodb_srv_conc_enter_innodb(prebuilt->trx);
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Merge  
monty@donna.mysql.fi committed
3447

3448
	error = row_insert_for_mysql((byte*) record, prebuilt);
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Merge  
monty@donna.mysql.fi committed
3449

3450
	if (error == DB_SUCCESS && auto_inc_used) {
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
3451

3452
		/* Fetch the value that was set in the autoincrement field */
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monty@hundin.mysql.fi committed
3453

3454
		auto_inc = table->next_number_field->val_int();
3455

3456
		if (auto_inc != 0) {
3457 3458
			/* This call will update the counter according to the
			value that was inserted in the table */
3459

3460 3461 3462
			dict_table_autoinc_update(prebuilt->table, auto_inc);
		}
	}
3463

3464 3465 3466
	/* A REPLACE command and LOAD DATA INFILE REPLACE handle a duplicate
	key error themselves, and we must update the autoinc counter if we are
	performing those statements. */
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heikki@hundin.mysql.fi committed
3467

3468 3469 3470 3471 3472
	if (error == DB_DUPLICATE_KEY && auto_inc_used
		&& (user_thd->lex->sql_command == SQLCOM_REPLACE
			|| user_thd->lex->sql_command == SQLCOM_REPLACE_SELECT
			|| (user_thd->lex->sql_command == SQLCOM_LOAD
				&& user_thd->lex->duplicates == DUP_REPLACE))) {
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3473

3474
		auto_inc = table->next_number_field->val_int();
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3475

3476 3477 3478 3479
		if (auto_inc != 0) {
			dict_table_autoinc_update(prebuilt->table, auto_inc);
		}
	}
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heikki@hundin.mysql.fi committed
3480

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heikki@hundin.mysql.fi committed
3481
	innodb_srv_conc_exit_innodb(prebuilt->trx);
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
3482

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3483
	error = convert_error_code_to_mysql(error, user_thd);
3484

3485
	/* Tell InnoDB server that there might be work for
3486
	utility threads: */
3487
func_exit:
3488
	innobase_active_small();
3489

3490
	DBUG_RETURN(error);
3491 3492
}

3493 3494 3495 3496 3497 3498 3499 3500 3501
/**************************************************************************
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 */
3502 3503
	mysql_byte*	old_row,	/* in: old row in MySQL format */
	mysql_byte*	new_row,	/* in: new row in MySQL format */
3504 3505
	struct st_table* table,		/* in: table in MySQL data
					dictionary */
3506
	mysql_byte*	upd_buff,	/* in: buffer to use */
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3507
	ulint		buff_len,	/* in: buffer length */
3508
	row_prebuilt_t*	prebuilt,	/* in: InnoDB prebuilt struct */
3509 3510
	THD*		thd)		/* in: user thread */
{
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3511
	mysql_byte*	original_upd_buff = upd_buff;
3512
	Field*		field;
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3513
	enum_field_types field_mysql_type;
3514 3515 3516
	uint		n_fields;
	ulint		o_len;
	ulint		n_len;
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3517
	ulint		col_pack_len;
3518
	byte*		new_mysql_row_col;
3519 3520 3521
	byte*		o_ptr;
	byte*		n_ptr;
	byte*		buf;
3522
	upd_field_t*	ufield;
3523
	ulint		col_type;
3524
	ulint		n_changed = 0;
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3525
	dfield_t	dfield;
3526
	uint		i;
3527

3528
	n_fields = table->s->fields;
3529

3530
	/* We use upd_buff to convert changed fields */
3531
	buf = (byte*) upd_buff;
3532

3533 3534 3535
	for (i = 0; i < n_fields; i++) {
		field = table->field[i];

3536
		/* if (thd->query_id != field->query_id) { */
3537 3538
			/* TODO: check that these fields cannot have
			changed! */
3539

3540 3541
		/*	goto skip_field;
		}*/
3542

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3543 3544
		o_ptr = (byte*) old_row + get_field_offset(table, field);
		n_ptr = (byte*) new_row + get_field_offset(table, field);
3545

3546 3547 3548
		/* Use new_mysql_row_col and col_pack_len save the values */

		new_mysql_row_col = n_ptr;
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3549
		col_pack_len = field->pack_length();
3550

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3551 3552
		o_len = col_pack_len;
		n_len = col_pack_len;
3553

3554
		/* We use o_ptr and n_ptr to dig up the actual data for
3555
		comparison. */
3556

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3557
		field_mysql_type = field->type();
3558

3559
		col_type = prebuilt->table->cols[i].type.mtype;
3560 3561 3562 3563 3564 3565

		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);
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heikki@hundin.mysql.fi committed
3566

3567
			break;
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heikki@hundin.mysql.fi committed
3568

3569 3570 3571
		case DATA_VARCHAR:
		case DATA_BINARY:
		case DATA_VARMYSQL:
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heikki@hundin.mysql.fi committed
3572 3573 3574 3575
			if (field_mysql_type == MYSQL_TYPE_VARCHAR) {
				/* This is a >= 5.0.3 type true VARCHAR where
				the real payload data length is stored in
				1 or 2 bytes */
3576

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3577
				o_ptr = row_mysql_read_true_varchar(
3578 3579 3580 3581
					&o_len, o_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));

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3582
				n_ptr = row_mysql_read_true_varchar(
3583 3584 3585
					&n_len, n_ptr,
					(ulint)
					(((Field_varstring*)field)->length_bytes));
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heikki@hundin.mysql.fi committed
3586 3587 3588
			}

			break;
3589 3590 3591
		default:
			;
		}
3592

3593
		if (field->null_ptr) {
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heikki@hundin.mysql.fi committed
3594 3595
			if (field_in_record_is_null(table, field,
							(char*) old_row)) {
3596 3597
				o_len = UNIV_SQL_NULL;
			}
3598

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heikki@hundin.mysql.fi committed
3599 3600
			if (field_in_record_is_null(table, field,
							(char*) new_row)) {
3601 3602 3603 3604 3605 3606 3607 3608 3609
				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;
3610

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heikki@hundin.mysql.fi committed
3611 3612 3613 3614 3615 3616 3617
			/* Let us use a dummy dfield to make the conversion
			from the MySQL column format to the InnoDB format */

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

			if (n_len != UNIV_SQL_NULL) {
				buf = row_mysql_store_col_in_innobase_format(
3618 3619 3620 3621 3622
					&dfield,
					(byte*)buf,
					TRUE,
					new_mysql_row_col,
					col_pack_len,
3623 3624
					dict_table_is_comp_noninline(
							prebuilt->table));
3625 3626
				ufield->new_val.data = dfield.data;
				ufield->new_val.len = dfield.len;
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3627 3628 3629 3630
			} else {
				ufield->new_val.data = NULL;
				ufield->new_val.len = UNIV_SQL_NULL;
			}
3631 3632

			ufield->exp = NULL;
3633
			ufield->field_no = prebuilt->table->cols[i].clust_pos;
3634 3635 3636 3637 3638 3639 3640
			n_changed++;
		}
	}

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

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heikki@hundin.mysql.fi committed
3641 3642
	ut_a(buf <= (byte*)original_upd_buff + buff_len);

3643 3644 3645 3646 3647 3648 3649
	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.
3650
TODO: currently InnoDB does not prevent the 'Halloween problem':
3651 3652
in a searched update a single row can get updated several times
if its index columns are updated! */
3653

3654 3655 3656 3657
int
ha_innobase::update_row(
/*====================*/
					/* out: error number or 0 */
3658 3659
	const mysql_byte*	old_row,/* in: old row in MySQL format */
	mysql_byte*		new_row)/* in: new row in MySQL format */
3660 3661 3662 3663 3664
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	upd_t*		uvect;
	int		error = 0;

3665
	DBUG_ENTER("ha_innobase::update_row");
3666

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3667
	ut_ad(prebuilt->trx ==
3668
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
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3669

3670 3671
	if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
		table->timestamp_field->set_time();
3672

3673
	if (last_query_id != user_thd->query_id) {
3674 3675
		prebuilt->sql_stat_start = TRUE;
		last_query_id = user_thd->query_id;
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3676 3677

		innobase_release_stat_resources(prebuilt->trx);
3678 3679
	}

3680 3681 3682 3683 3684
	if (prebuilt->upd_node) {
		uvect = prebuilt->upd_node->update;
	} else {
		uvect = row_get_prebuilt_update_vector(prebuilt);
	}
3685 3686 3687 3688

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

3689
	calc_row_difference(uvect, (mysql_byte*) old_row, new_row, table,
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3690 3691 3692
			upd_buff, (ulint)upd_and_key_val_buff_len,
			prebuilt, user_thd);

3693 3694 3695
	/* This is not a delete */
	prebuilt->upd_node->is_delete = FALSE;

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3696
	assert(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW);
3697

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heikki@hundin.mysql.fi committed
3698
	innodb_srv_conc_enter_innodb(prebuilt->trx);
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Merge  
monty@donna.mysql.fi committed
3699

3700
	error = row_update_for_mysql((byte*) old_row, prebuilt);
3701

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3702
	innodb_srv_conc_exit_innodb(prebuilt->trx);
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Merge  
monty@donna.mysql.fi committed
3703

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3704
	error = convert_error_code_to_mysql(error, user_thd);
3705

3706
	/* Tell InnoDB server that there might be work for
3707 3708
	utility threads: */

3709
	innobase_active_small();
3710 3711 3712 3713 3714 3715 3716 3717 3718 3719

	DBUG_RETURN(error);
}

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

int
ha_innobase::delete_row(
/*====================*/
3720 3721
					/* out: error number or 0 */
	const mysql_byte* record)	/* in: a row in MySQL format */
3722 3723 3724 3725
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error = 0;

3726
	DBUG_ENTER("ha_innobase::delete_row");
3727

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3728
	ut_ad(prebuilt->trx ==
3729
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
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heikki@hundin.mysql.fi committed
3730

3731
	if (last_query_id != user_thd->query_id) {
3732 3733
		prebuilt->sql_stat_start = TRUE;
		last_query_id = user_thd->query_id;
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heikki@donna.mysql.fi committed
3734 3735

		innobase_release_stat_resources(prebuilt->trx);
3736 3737
	}

3738 3739 3740
	if (!prebuilt->upd_node) {
		row_get_prebuilt_update_vector(prebuilt);
	}
3741 3742

	/* This is a delete */
3743

3744
	prebuilt->upd_node->is_delete = TRUE;
3745

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3746
	innodb_srv_conc_enter_innodb(prebuilt->trx);
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Merge  
monty@donna.mysql.fi committed
3747

3748
	error = row_update_for_mysql((byte*) record, prebuilt);
3749

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3750
	innodb_srv_conc_exit_innodb(prebuilt->trx);
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Merge  
monty@donna.mysql.fi committed
3751

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3752
	error = convert_error_code_to_mysql(error, user_thd);
3753

3754
	/* Tell the InnoDB server that there might be work for
3755 3756
	utility threads: */

3757
	innobase_active_small();
3758 3759 3760 3761

	DBUG_RETURN(error);
}

3762
/**************************************************************************
3763
Removes a new lock set on a row, if it was not read optimistically. This can
3764 3765
be called after a row has been read in the processing of an UPDATE or a DELETE
query, if the option innodb_locks_unsafe_for_binlog is set. */
3766 3767 3768 3769 3770 3771 3772 3773 3774

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

	DBUG_ENTER("ha_innobase::unlock_row");

3775
	if (UNIV_UNLIKELY(last_query_id != user_thd->query_id)) {
3776
		ut_print_timestamp(stderr);
3777 3778 3779
		sql_print_error("last_query_id is %lu != user_thd_query_id is "
				"%lu", (ulong) last_query_id,
				(ulong) user_thd->query_id);
3780 3781 3782
		mem_analyze_corruption((byte *) prebuilt->trx);
		ut_error;
	}
3783

3784 3785 3786 3787 3788 3789 3790
	/* Consistent read does not take any locks, thus there is
	nothing to unlock. */

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

3791 3792
	switch (prebuilt->row_read_type) {
	case ROW_READ_WITH_LOCKS:
3793 3794
		if (!srv_locks_unsafe_for_binlog
		|| prebuilt->trx->isolation_level == TRX_ISO_READ_COMMITTED) {
3795 3796 3797 3798
			break;
		}
		/* fall through */
	case ROW_READ_TRY_SEMI_CONSISTENT:
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3799
		row_unlock_for_mysql(prebuilt, FALSE);
3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825
		break;
	case ROW_READ_DID_SEMI_CONSISTENT:
		prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT;
		break;
	}

	DBUG_VOID_RETURN;
}

/* See handler.h and row0mysql.h for docs on this function. */
bool
ha_innobase::was_semi_consistent_read(void)
/*=======================================*/
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;

	return(prebuilt->row_read_type == ROW_READ_DID_SEMI_CONSISTENT);
}

/* See handler.h and row0mysql.h for docs on this function. */
void
ha_innobase::try_semi_consistent_read(bool yes)
/*===========================================*/
{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;

3826 3827 3828 3829 3830 3831 3832
	/* Row read type is set to semi consistent read if this was
	requested by the MySQL and either innodb_locks_unsafe_for_binlog
	option is used or this session is using READ COMMITTED isolation
	level. */

	if (yes &&  (srv_locks_unsafe_for_binlog
		|| prebuilt->trx->isolation_level == TRX_ISO_READ_COMMITTED)) {
3833 3834 3835
		prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT;
	} else {
		prebuilt->row_read_type = ROW_READ_WITH_LOCKS;
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3836
	}
3837 3838
}

3839 3840 3841 3842 3843 3844 3845
/**********************************************************************
Initializes a handle to use an index. */

int
ha_innobase::index_init(
/*====================*/
			/* out: 0 or error number */
3846 3847
	uint	keynr,	/* in: key (index) number */
	bool sorted)	/* in: 1 if result MUST be sorted according to index */
3848
{
3849 3850
	int	error	= 0;
	DBUG_ENTER("index_init");
3851

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Merge  
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3852
	error = change_active_index(keynr);
3853

3854
	DBUG_RETURN(error);
3855 3856 3857
}

/**********************************************************************
3858
Currently does nothing. */
3859 3860 3861 3862 3863

int
ha_innobase::index_end(void)
/*========================*/
{
3864 3865 3866 3867
	int	error	= 0;
	DBUG_ENTER("index_end");
	active_index=MAX_KEY;
	DBUG_RETURN(error);
3868 3869 3870 3871
}

/*************************************************************************
Converts a search mode flag understood by MySQL to a flag understood
3872
by InnoDB. */
3873 3874 3875 3876 3877 3878 3879
inline
ulint
convert_search_mode_to_innobase(
/*============================*/
	enum ha_rkey_function	find_flag)
{
	switch (find_flag) {
3880 3881 3882
		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);
3883 3884 3885 3886
		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);
3887 3888
		case HA_READ_PREFIX_LAST:	return(PAGE_CUR_LE);
		case HA_READ_PREFIX_LAST_OR_PREV:return(PAGE_CUR_LE);
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3889 3890
		  /* In MySQL-4.0 HA_READ_PREFIX and HA_READ_PREFIX_LAST always
		  pass a complete-field prefix of a key value as the search
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3891 3892 3893 3894 3895
		  tuple. I.e., it is not allowed that the last field would
		  just contain n first bytes of the full field value.
		  MySQL uses a 'padding' trick to convert LIKE 'abc%'
		  type queries so that it can use as a search tuple
		  a complete-field-prefix of a key value. Thus, the InnoDB
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		  search mode PAGE_CUR_LE_OR_EXTENDS is never used.
		  TODO: when/if MySQL starts to use also partial-field
		  prefixes, we have to deal with stripping of spaces
		  and comparison of non-latin1 char type fields in
		  innobase_mysql_cmp() to get PAGE_CUR_LE_OR_EXTENDS to
		  work correctly. */

3903 3904 3905 3906 3907
		default:			assert(0);
	}

	return(0);
}
3908

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3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957
/*
   BACKGROUND INFO: HOW A SELECT SQL QUERY IS EXECUTED
   ---------------------------------------------------
The following does not cover all the details, but explains how we determine
the start of a new SQL statement, and what is associated with it.

For each table in the database the MySQL interpreter may have several
table handle instances in use, also in a single SQL query. For each table
handle instance there is an InnoDB  'prebuilt' struct which contains most
of the InnoDB data associated with this table handle instance.

  A) if the user has not explicitly set any MySQL table level locks:

  1) MySQL calls ::external_lock to set an 'intention' table level lock on
the table of the handle instance. There we set
prebuilt->sql_stat_start = TRUE. The flag sql_stat_start should be set
true if we are taking this table handle instance to use in a new SQL
statement issued by the user. We also increment trx->n_mysql_tables_in_use.

  2) If prebuilt->sql_stat_start == TRUE we 'pre-compile' the MySQL search
instructions to prebuilt->template of the table handle instance in
::index_read. The template is used to save CPU time in large joins.

  3) In row_search_for_mysql, if prebuilt->sql_stat_start is true, we
allocate a new consistent read view for the trx if it does not yet have one,
or in the case of a locking read, set an InnoDB 'intention' table level
lock on the table.

  4) We do the SELECT. MySQL may repeatedly call ::index_read for the
same table handle instance, if it is a join.

  5) When the SELECT ends, MySQL removes its intention table level locks
in ::external_lock. When trx->n_mysql_tables_in_use drops to zero,
 (a) we execute a COMMIT there if the autocommit is on,
 (b) we also release possible 'SQL statement level resources' InnoDB may
have for this SQL statement. The MySQL interpreter does NOT execute
autocommit for pure read transactions, though it should. That is why the
table handler in that case has to execute the COMMIT in ::external_lock.

  B) If the user has explicitly set MySQL table level locks, then MySQL
does NOT call ::external_lock at the start of the statement. To determine
when we are at the start of a new SQL statement we at the start of
::index_read also compare the query id to the latest query id where the
table handle instance was used. If it has changed, we know we are at the
start of a new SQL statement. Since the query id can theoretically
overwrap, we use this test only as a secondary way of determining the
start of a new SQL statement. */


3958 3959 3960 3961 3962 3963 3964 3965 3966
/**************************************************************************
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 */
3967
	mysql_byte*		buf,	/* in/out: buffer for the returned
3968
					row */
3969
	const mysql_byte*	key_ptr,/* in: key value; if this is NULL
3970
					we position the cursor at the
3971 3972 3973
					start or end of index; this can
					also contain an InnoDB row id, in
					which case key_len is the InnoDB
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3974 3975 3976 3977
					row id length; the key value can
					also be a prefix of a full key value,
					and the last column can be a prefix
					of a full column */
3978
	uint			key_len,/* in: key value length */
3979 3980 3981 3982 3983
	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;
3984 3985
	ulint		match_mode	= 0;
	int		error;
3986 3987
	ulint		ret;

3988
	DBUG_ENTER("index_read");
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3989

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3990
	ut_ad(prebuilt->trx ==
3991
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
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3992

3993 3994
	statistic_increment(current_thd->status_var.ha_read_key_count,
		&LOCK_status);
3995

3996
	if (last_query_id != user_thd->query_id) {
3997 3998
		prebuilt->sql_stat_start = TRUE;
		last_query_id = user_thd->query_id;
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3999 4000

		innobase_release_stat_resources(prebuilt->trx);
4001 4002
	}

4003
	index = prebuilt->index;
4004

4005
	/* Note that if the index for which the search template is built is not
4006
	necessarily prebuilt->index, but can also be the clustered index */
4007

4008 4009 4010 4011
	if (prebuilt->sql_stat_start) {
		build_template(prebuilt, user_thd, table,
							ROW_MYSQL_REC_FIELDS);
	}
4012 4013

	if (key_ptr) {
4014
		/* Convert the search key value to InnoDB format into
4015 4016
		prebuilt->search_tuple */

4017
		row_sel_convert_mysql_key_to_innobase(prebuilt->search_tuple,
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4018 4019 4020 4021
					(byte*) key_val_buff,
					(ulint)upd_and_key_val_buff_len,
					index,
					(byte*) key_ptr,
4022
					(ulint) key_len, prebuilt->trx);
4023 4024 4025 4026
	} else {
		/* We position the cursor to the last or the first entry
		in the index */

4027
		dtuple_set_n_fields(prebuilt->search_tuple, 0);
4028
	}
4029

4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041
	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;
	}

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4042
	last_match_mode = (uint) match_mode;
4043

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4044
	innodb_srv_conc_enter_innodb(prebuilt->trx);
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4045

4046
	ret = row_search_for_mysql((byte*) buf, mode, prebuilt, match_mode, 0);
4047

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4048
	innodb_srv_conc_exit_innodb(prebuilt->trx);
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4049

4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061
	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 {
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4062
		error = convert_error_code_to_mysql((int) ret, user_thd);
4063 4064
		table->status = STATUS_NOT_FOUND;
	}
4065

4066 4067 4068
	DBUG_RETURN(error);
}

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4069 4070 4071
/***********************************************************************
The following functions works like index_read, but it find the last
row with the current key value or prefix. */
4072 4073

int
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4074 4075
ha_innobase::index_read_last(
/*=========================*/
4076
				   /* out: 0, HA_ERR_KEY_NOT_FOUND, or an
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4077
				   error code */
4078 4079
	mysql_byte*	  buf,	   /* out: fetched row */
	const mysql_byte* key_ptr, /* in: key value, or a prefix of a full
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4080
				   key value */
4081
	uint		  key_len) /* in: length of the key val or prefix
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4082
				   in bytes */
4083
{
4084
	return(index_read(buf, key_ptr, key_len, HA_READ_PREFIX_LAST));
4085 4086
}

4087
/************************************************************************
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4088
Changes the active index of a handle. */
4089 4090 4091 4092

int
ha_innobase::change_active_index(
/*=============================*/
4093
			/* out: 0 or error code */
4094
	uint	keynr)	/* in: use this index; MAX_KEY means always clustered
4095
			index, even if it was internally generated by
4096
			InnoDB */
4097
{
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4098 4099
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	KEY*		key=0;
4100
	statistic_increment(current_thd->status_var.ha_read_key_count,
4101
		&LOCK_status);
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4102
	DBUG_ENTER("change_active_index");
4103

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4104 4105
	ut_ad(user_thd == current_thd);
	ut_ad(prebuilt->trx ==
4106
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
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4107

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4108
	active_index = keynr;
4109

4110
	if (keynr != MAX_KEY && table->s->keys > 0) {
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4111
		key = table->key_info + active_index;
4112

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4113
		prebuilt->index = dict_table_get_index_noninline(
4114 4115
			prebuilt->table, key->name);
	} else {
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4116
		prebuilt->index = dict_table_get_first_index_noninline(
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4117
							   prebuilt->table);
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4118
	}
4119

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4120
	if (!prebuilt->index) {
4121 4122 4123 4124 4125 4126 4127
		sql_print_error(
			"Innodb could not find key n:o %u with name %s "
			"from dict cache for table %s",
			keynr, key ? key->name : "NULL",
			prebuilt->table->name);

		DBUG_RETURN(1);
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4128
	}
4129

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4130
	assert(prebuilt->search_tuple != 0);
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4131

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4132
	dtuple_set_n_fields(prebuilt->search_tuple, prebuilt->index->n_fields);
4133

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4134
	dict_index_copy_types(prebuilt->search_tuple, prebuilt->index,
4135
			prebuilt->index->n_fields);
4136

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4137 4138 4139 4140 4141
	/* MySQL changes the active index for a handle also during some
	queries, for example SELECT MAX(a), SUM(a) first retrieves the MAX()
	and then calculates the sum. Previously we played safe and used
	the flag ROW_MYSQL_WHOLE_ROW below, but that caused unnecessary
	copying. Starting from MySQL-4.1 we use a more efficient flag here. */
4142

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4143
	build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS);
4144

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4145
	DBUG_RETURN(0);
4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156
}

/**************************************************************************
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 */
4157
	mysql_byte*	buf,		/* in/out: buffer for the returned
4158
					row */
4159
	uint		keynr,		/* in: use this index */
4160
	const mysql_byte* key,		/* in: key value; if this is NULL
4161 4162 4163 4164 4165
					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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4166 4167 4168 4169
	if (change_active_index(keynr)) {

		return(1);
	}
4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182

	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 */
4183
	mysql_byte*	buf,	/* in/out: buffer for next row in MySQL
4184
				format */
4185
	uint	direction,	/* in: ROW_SEL_NEXT or ROW_SEL_PREV */
4186 4187 4188 4189 4190 4191
	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;
4192

4193
	DBUG_ENTER("general_fetch");
4194

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4195
	ut_ad(prebuilt->trx ==
4196
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
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4197

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4198
	innodb_srv_conc_enter_innodb(prebuilt->trx);
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4199

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4200 4201
	ret = row_search_for_mysql((byte*)buf, 0, prebuilt, match_mode,
								direction);
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4202
	innodb_srv_conc_exit_innodb(prebuilt->trx);
4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215

	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 {
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4216
		error = convert_error_code_to_mysql((int) ret, user_thd);
4217 4218
		table->status = STATUS_NOT_FOUND;
	}
4219

4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231
	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 */
4232
	mysql_byte*	buf)	/* in/out: buffer for next row in MySQL
4233 4234
				format */
{
4235 4236
	statistic_increment(current_thd->status_var.ha_read_next_count,
		&LOCK_status);
4237

4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248
	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 */
4249
	mysql_byte*	buf,	/* in/out: buffer for the row */
4250
	const mysql_byte* key,	/* in: key value */
4251
	uint		keylen)	/* in: key value length */
4252
{
4253 4254
	statistic_increment(current_thd->status_var.ha_read_next_count,
		&LOCK_status);
4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267

	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 */
4268
	mysql_byte*	buf)	/* in/out: buffer for previous row in MySQL
4269 4270
				format */
{
4271 4272 4273
	statistic_increment(current_thd->status_var.ha_read_prev_count,
		&LOCK_status);

4274 4275 4276 4277 4278 4279 4280 4281 4282 4283
	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(
/*=====================*/
4284
				/* out: 0, HA_ERR_END_OF_FILE,
4285 4286
				or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
4287 4288 4289
{
	int	error;

4290 4291 4292
	DBUG_ENTER("index_first");
	statistic_increment(current_thd->status_var.ha_read_first_count,
		&LOCK_status);
4293

4294
	error = index_read(buf, NULL, 0, HA_READ_AFTER_KEY);
4295

4296
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
4297

4298 4299 4300
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
4301

4302
	DBUG_RETURN(error);
4303 4304 4305 4306 4307 4308 4309 4310 4311
}

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

int
ha_innobase::index_last(
/*====================*/
4312 4313
				/* out: 0, HA_ERR_END_OF_FILE, or error code */
	mysql_byte*	buf)	/* in/out: buffer for the row */
4314 4315 4316
{
	int	error;

4317 4318 4319
	DBUG_ENTER("index_last");
	statistic_increment(current_thd->status_var.ha_read_last_count,
		&LOCK_status);
4320

4321
	error = index_read(buf, NULL, 0, HA_READ_BEFORE_KEY);
4322

4323
	/* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */
4324

4325 4326 4327
	if (error == HA_ERR_KEY_NOT_FOUND) {
		error = HA_ERR_END_OF_FILE;
	}
4328

4329
	DBUG_RETURN(error);
4330 4331 4332 4333 4334 4335 4336 4337 4338
}

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

int
ha_innobase::rnd_init(
/*==================*/
			/* out: 0 or error number */
4339
	bool	scan)	/* in: ???????? */
4340
{
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4341
	int	err;
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4342

4343
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
4344

4345 4346 4347
	/* Store the active index value so that we can restore the original
	value after a scan */

4348
	if (prebuilt->clust_index_was_generated) {
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4349
		err = change_active_index(MAX_KEY);
4350
	} else {
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4351
		err = change_active_index(primary_key);
4352
	}
4353

4354 4355 4356 4357 4358 4359 4360
	/* Don't use semi-consistent read in random row reads (by position).
	This means we must disable semi_consistent_read if scan is false */

	if (!scan) {
		try_semi_consistent_read(0);
	}

4361
	start_of_scan = 1;
4362

4363
	return(err);
4364 4365 4366
}

/*********************************************************************
4367
Ends a table scan. */
4368 4369 4370 4371 4372 4373

int
ha_innobase::rnd_end(void)
/*======================*/
				/* out: 0 or error number */
{
4374
	return(index_end());
4375 4376 4377 4378 4379 4380 4381 4382 4383 4384
}

/*********************************************************************
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 */
4385
	mysql_byte* buf)/* in/out: returns the row in this buffer,
4386 4387
			in MySQL format */
{
4388
	int	error;
4389

4390 4391 4392
	DBUG_ENTER("rnd_next");
	statistic_increment(current_thd->status_var.ha_read_rnd_next_count,
		&LOCK_status);
4393

4394
	if (start_of_scan) {
4395 4396 4397 4398
		error = index_first(buf);
		if (error == HA_ERR_KEY_NOT_FOUND) {
			error = HA_ERR_END_OF_FILE;
		}
4399
		start_of_scan = 0;
4400
	} else {
4401
		error = general_fetch(buf, ROW_SEL_NEXT, 0);
4402
	}
4403

4404
	DBUG_RETURN(error);
4405 4406 4407
}

/**************************************************************************
4408
Fetches a row from the table based on a row reference. */
4409

4410 4411 4412
int
ha_innobase::rnd_pos(
/*=================*/
4413 4414
				/* out: 0, HA_ERR_KEY_NOT_FOUND,
				or error code */
4415
	mysql_byte*	buf,	/* in/out: buffer for the row */
4416 4417 4418 4419 4420
	mysql_byte*	pos)	/* in: primary key value of the row in the
				MySQL format, or the row id if the clustered
				index was internally generated by InnoDB;
				the length of data in pos has to be
				ref_length */
4421
{
4422 4423 4424
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	int		error;
	uint		keynr	= active_index;
4425
	DBUG_ENTER("rnd_pos");
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4426
	DBUG_DUMP("key", (char*) pos, ref_length);
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4427

4428
	statistic_increment(current_thd->status_var.ha_read_rnd_count,
4429
		&LOCK_status);
4430

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4431
	ut_ad(prebuilt->trx ==
4432
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4433

4434 4435 4436 4437
	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
4438
		that MySQL knows of */
4439

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
4440
		error = change_active_index(MAX_KEY);
4441
	} else {
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
4442
		error = change_active_index(primary_key);
4443
	}
4444

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
4445
	if (error) {
4446
		DBUG_PRINT("error", ("Got error: %ld", error));
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
4447 4448
		DBUG_RETURN(error);
	}
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4449

4450
	/* Note that we assume the length of the row reference is fixed
4451
	for the table, and it is == ref_length */
4452 4453

	error = index_read(buf, pos, ref_length, HA_READ_KEY_EXACT);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4454 4455 4456

	if (error) {
		DBUG_PRINT("error", ("Got error: %ld", error));
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4457
	}
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4458

4459
	change_active_index(keynr);
4460

4461
	DBUG_RETURN(error);
4462 4463 4464
}

/*************************************************************************
4465
Stores a reference to the current row to 'ref' field of the handle. Note
4466 4467
that in the case where we have generated the clustered index for the
table, the function parameter is illogical: we MUST ASSUME that 'record'
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4468
is the current 'position' of the handle, because if row ref is actually
4469
the row id internally generated in InnoDB, then 'record' does not contain
4470 4471
it. We just guess that the row id must be for the record where the handle
was positioned the last time. */
4472 4473 4474 4475

void
ha_innobase::position(
/*==================*/
4476
	const mysql_byte*	record)	/* in: row in MySQL format */
4477
{
4478 4479
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	uint		len;
4480

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4481
	ut_ad(prebuilt->trx ==
4482
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4483

4484 4485 4486 4487
	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
4488
		that MySQL knows of */
4489 4490 4491 4492 4493

		len = DATA_ROW_ID_LEN;

		memcpy(ref, prebuilt->row_id, len);
	} else {
4494 4495
		len = store_key_val_for_row(primary_key, (char*)ref,
							 ref_length, record);
4496
	}
4497

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4498 4499
	/* We assume that the 'ref' value len is always fixed for the same
	table. */
4500

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heikki@hundin.mysql.fi committed
4501
	if (len != ref_length) {
4502
	  sql_print_error("Stored ref len is %lu, but table ref len is %lu",
4503
			  (ulong) len, (ulong) ref_length);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4504
	}
4505 4506 4507
}

/*********************************************************************
4508
Creates a table definition to an InnoDB database. */
4509 4510 4511 4512
static
int
create_table_def(
/*=============*/
4513
	trx_t*		trx,		/* in: InnoDB transaction handle */
4514 4515
	TABLE*		form,		/* in: information on table
					columns and indexes */
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heikki@hundin.mysql.fi committed
4516
	const char*	table_name,	/* in: table name */
marko@hundin.mysql.fi's avatar
marko@hundin.mysql.fi committed
4517
	const char*	path_of_temp_table,/* in: if this is a table explicitly
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heikki@hundin.mysql.fi committed
4518 4519 4520 4521 4522 4523 4524
					created by the user with the
					TEMPORARY keyword, then this
					parameter is the dir path where the
					table should be placed if we create
					an .ibd file for it (no .ibd extension
					in the path, though); otherwise this
					is NULL */
4525
	ulint		flags)		/* in: table flags */
4526 4527 4528 4529
{
	Field*		field;
	dict_table_t*	table;
	ulint		n_cols;
4530 4531
	int		error;
	ulint		col_type;
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heikki@hundin.mysql.fi committed
4532
	ulint		col_len;
4533
	ulint		nulls_allowed;
4534
	ulint		unsigned_type;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4535
	ulint		binary_type;
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heikki@hundin.mysql.fi committed
4536
	ulint		long_true_varchar;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4537
	ulint		charset_no;
4538
	ulint		i;
4539

4540 4541
	DBUG_ENTER("create_table_def");
	DBUG_PRINT("enter", ("table_name: %s", table_name));
4542

4543
	n_cols = form->s->fields;
4544

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4545 4546
	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
4547

4548
	table = dict_mem_table_create(table_name, 0, n_cols, flags);
4549

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heikki@hundin.mysql.fi committed
4550 4551 4552 4553 4554
	if (path_of_temp_table) {
		table->dir_path_of_temp_table =
			mem_heap_strdup(table->heap, path_of_temp_table);
	}

4555 4556 4557
	for (i = 0; i < n_cols; i++) {
		field = form->field[i];

4558 4559
		col_type = get_innobase_type_from_mysql_type(&unsigned_type,
									field);
4560 4561 4562 4563 4564 4565
		if (field->null_ptr) {
			nulls_allowed = 0;
		} else {
			nulls_allowed = DATA_NOT_NULL;
		}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4566
		if (field->binary()) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4567 4568 4569 4570 4571
			binary_type = DATA_BINARY_TYPE;
		} else {
			binary_type = 0;
		}

4572
		charset_no = 0;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4573 4574 4575 4576 4577

		if (dtype_is_string_type(col_type)) {

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

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590
			ut_a(charset_no < 256); /* in data0type.h we assume
						that the number fits in one
						byte */
		}

		ut_a(field->type() < 256); /* we assume in dtype_form_prtype()
					   that this fits in one byte */
		col_len = field->pack_length();

		/* The MySQL pack length contains 1 or 2 bytes length field
		for a true VARCHAR. Let us subtract that, so that the InnoDB
		column length in the InnoDB data dictionary is the real
		maximum byte length of the actual data. */
4591

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heikki@hundin.mysql.fi committed
4592 4593 4594 4595 4596 4597 4598 4599
		long_true_varchar = 0;

		if (field->type() == MYSQL_TYPE_VARCHAR) {
			col_len -= ((Field_varstring*)field)->length_bytes;

			if (((Field_varstring*)field)->length_bytes == 2) {
				long_true_varchar = DATA_LONG_TRUE_VARCHAR;
			}
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4600 4601
		}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4602
		dict_mem_table_add_col(table,
4603 4604 4605 4606 4607 4608 4609 4610 4611
			(char*) field->field_name,
			col_type,
			dtype_form_prtype(
				(ulint)field->type()
				| nulls_allowed | unsigned_type
				| binary_type | long_true_varchar,
				charset_no),
			col_len,
			0);
4612 4613 4614 4615
	}

	error = row_create_table_for_mysql(table, trx);

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4616
	error = convert_error_code_to_mysql(error, NULL);
4617 4618 4619 4620 4621

	DBUG_RETURN(error);
}

/*********************************************************************
4622
Creates an index in an InnoDB database. */
4623 4624
static
int
4625 4626
create_index(
/*=========*/
4627
	trx_t*		trx,		/* in: InnoDB transaction handle */
4628 4629 4630 4631 4632
	TABLE*		form,		/* in: information on table
					columns and indexes */
	const char*	table_name,	/* in: table name */
	uint		key_num)	/* in: index number */
{
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4633
	Field*		field;
4634
	dict_index_t*	index;
4635
	int		error;
4636 4637 4638 4639
	ulint		n_fields;
	KEY*		key;
	KEY_PART_INFO*	key_part;
	ulint		ind_type;
4640 4641
	ulint		col_type;
	ulint		prefix_len;
4642
	ulint		is_unsigned;
4643 4644
	ulint		i;
	ulint		j;
4645
	ulint*		field_lengths;
4646 4647

	DBUG_ENTER("create_index");
4648

4649 4650
	key = form->key_info + key_num;

4651
	n_fields = key->key_parts;
4652

4653
	ind_type = 0;
4654

4655
	if (key_num == form->s->primary_key) {
4656 4657
		ind_type = ind_type | DICT_CLUSTERED;
	}
4658

4659 4660 4661 4662
	if (key->flags & HA_NOSAME ) {
		ind_type = ind_type | DICT_UNIQUE;
	}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4663 4664
	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
4665 4666 4667

	index = dict_mem_index_create((char*) table_name, key->name, 0,
						ind_type, n_fields);
4668 4669 4670

	field_lengths = (ulint*) my_malloc(sizeof(ulint) * n_fields,
		MYF(MY_FAE));
4671

4672 4673 4674
	for (i = 0; i < n_fields; i++) {
		key_part = key->key_part + i;

4675
		/* (The flag HA_PART_KEY_SEG denotes in MySQL a column prefix
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4676 4677 4678 4679
		field in an index: we only store a specified number of first
		bytes of the column to the index field.) The flag does not
		seem to be properly set by MySQL. Let us fall back on testing
		the length of the key part versus the column. */
4680

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heikki@hundin.mysql.fi committed
4681
		field = NULL;
4682
		for (j = 0; j < form->s->fields; j++) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4683 4684 4685

			field = form->field[j];

4686 4687 4688
			if (0 == innobase_strcasecmp(
					field->field_name,
					key_part->field->field_name)) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4689 4690 4691 4692 4693 4694
				/* Found the corresponding column */

				break;
			}
		}

4695
		ut_a(j < form->s->fields);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4696

4697 4698
		col_type = get_innobase_type_from_mysql_type(
					&is_unsigned, key_part->field);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4699 4700

		if (DATA_BLOB == col_type
4701 4702 4703 4704 4705
			|| (key_part->length < field->pack_length()
				&& field->type() != MYSQL_TYPE_VARCHAR)
			|| (field->type() == MYSQL_TYPE_VARCHAR
				&& key_part->length < field->pack_length()
				- ((Field_varstring*)field)->length_bytes)) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4706

4707
			prefix_len = key_part->length;
4708 4709

			if (col_type == DATA_INT
4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721
				|| col_type == DATA_FLOAT
				|| col_type == DATA_DOUBLE
				|| col_type == DATA_DECIMAL) {
				sql_print_error(
					"MySQL is trying to create a column "
					"prefix index field, on an "
					"inappropriate data type. Table "
					"name %s, column name %s.",
					table_name,
					key_part->field->field_name);

				prefix_len = 0;
4722 4723
			}
		} else {
4724
			prefix_len = 0;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4725 4726
		}

4727 4728
		field_lengths[i] = key_part->length;

4729
		dict_mem_index_add_field(index,
4730
			(char*) key_part->field->field_name, prefix_len);
4731 4732
	}

4733 4734 4735
	/* Even though we've defined max_supported_key_part_length, we
	still do our own checking using field_lengths to be absolutely
	sure we don't create too long indexes. */
4736
	error = row_create_index_for_mysql(index, trx, field_lengths);
4737

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4738
	error = convert_error_code_to_mysql(error, NULL);
4739

4740
	my_free((gptr) field_lengths, MYF(0));
4741

4742 4743 4744 4745
	DBUG_RETURN(error);
}

/*********************************************************************
4746
Creates an index to an InnoDB table when the user has defined no
4747
primary index. */
4748 4749
static
int
4750 4751
create_clustered_index_when_no_primary(
/*===================================*/
4752
	trx_t*		trx,		/* in: InnoDB transaction handle */
4753 4754 4755
	const char*	table_name)	/* in: table name */
{
	dict_index_t*	index;
4756
	int		error;
4757

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4758 4759
	/* We pass 0 as the space id, and determine at a lower level the space
	id where to store the table */
4760

monty@donna.mysql.fi's avatar
monty@donna.mysql.fi committed
4761
	index = dict_mem_index_create((char*) table_name,
4762
		(char*) "GEN_CLUST_INDEX", 0, DICT_CLUSTERED, 0);
4763
	error = row_create_index_for_mysql(index, trx, NULL);
4764

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4765
	error = convert_error_code_to_mysql(error, NULL);
4766

4767
	return(error);
4768 4769 4770
}

/*********************************************************************
4771
Creates a new table to an InnoDB database. */
4772 4773 4774 4775 4776 4777 4778 4779

int
ha_innobase::create(
/*================*/
					/* out: error number */
	const char*	name,		/* in: table name */
	TABLE*		form,		/* in: information on table
					columns and indexes */
4780 4781 4782
	HA_CREATE_INFO*	create_info)	/* in: more information of the
					created table, contains also the
					create statement string */
4783 4784 4785
{
	int		error;
	dict_table_t*	innobase_table;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4786
	trx_t*		parent_trx;
4787
	trx_t*		trx;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4788
	int		primary_key_no;
4789
	uint		i;
4790 4791
	char		name2[FN_REFLEN];
	char		norm_name[FN_REFLEN];
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4792
	THD		*thd= current_thd;
4793 4794
	ib_longlong	auto_inc_value;
	ulint		flags;
4795

4796
	DBUG_ENTER("ha_innobase::create");
4797

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4798
	DBUG_ASSERT(thd != NULL);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4799

4800
	if (form->s->fields > 1000) {
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heikki@hundin.mysql.fi committed
4801 4802 4803
		/* The limit probably should be REC_MAX_N_FIELDS - 3 = 1020,
		but we play safe here */

4804 4805
		DBUG_RETURN(HA_ERR_TO_BIG_ROW);
	}
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4806

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4807 4808
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
4809

4810
	parent_trx = check_trx_exists(thd);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4811 4812 4813 4814

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

4815 4816
	trx_search_latch_release_if_reserved(parent_trx);

4817
	trx = trx_allocate_for_mysql();
4818

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4819 4820
	trx->mysql_thd = thd;
	trx->mysql_query_str = &((*thd).query);
4821

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4822
	if (thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4823 4824 4825
		trx->check_foreigns = FALSE;
	}

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4826
	if (thd->options & OPTION_RELAXED_UNIQUE_CHECKS) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4827 4828 4829
		trx->check_unique_secondary = FALSE;
	}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4830 4831 4832 4833 4834
	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4835

4836
	strcpy(name2, name);
4837 4838

	normalize_table_name(norm_name, name2);
4839

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4840
	/* Latch the InnoDB data dictionary exclusively so that no deadlocks
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heikki@hundin.mysql.fi committed
4841
	or lock waits can happen in it during a table create operation.
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4842
	Drop table etc. do this latching in row0mysql.c. */
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heikki@hundin.mysql.fi committed
4843

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heikki@hundin.mysql.fi committed
4844
	row_mysql_lock_data_dictionary(trx);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4845 4846

	/* Create the table definition in InnoDB */
4847

4848 4849 4850 4851 4852 4853
	flags = 0;

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

marko@hundin.mysql.fi's avatar
marko@hundin.mysql.fi committed
4854 4855
	error = create_table_def(trx, form, norm_name,
		create_info->options & HA_LEX_CREATE_TMP_TABLE ? name2 : NULL,
4856
		flags);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4857

4858
	if (error) {
4859
		goto cleanup;
4860
	}
4861

4862 4863
	/* Look for a primary key */

4864
	primary_key_no= (form->s->primary_key != MAX_KEY ?
4865
			 (int) form->s->primary_key :
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4866
			 -1);
4867

4868 4869 4870
	/* Our function row_get_mysql_key_number_for_index assumes
	the primary key is always number 0, if it exists */

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4871
	DBUG_ASSERT(primary_key_no == -1 || primary_key_no == 0);
4872

4873 4874
	/* Create the keys */

4875
	if (form->s->keys == 0 || primary_key_no == -1) {
4876 4877
		/* Create an index which is used as the clustered index;
		order the rows by their row id which is internally generated
4878
		by InnoDB */
4879

4880
		error = create_clustered_index_when_no_primary(trx,
4881
							norm_name);
4882
		if (error) {
4883
			goto cleanup;
4884
		}
4885 4886 4887
	}

	if (primary_key_no != -1) {
4888
		/* In InnoDB the clustered index must always be created
4889
		first */
4890
		if ((error = create_index(trx, form, norm_name,
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monty@donna.mysql.fi committed
4891
					  (uint) primary_key_no))) {
4892
			goto cleanup;
4893 4894
		}
	}
4895

4896
	for (i = 0; i < form->s->keys; i++) {
4897 4898 4899

		if (i != (uint) primary_key_no) {

4900
			if ((error = create_index(trx, form, norm_name, i))) {
4901
				goto cleanup;
4902 4903 4904
			}
		}
	}
4905

4906
	if (thd->query != NULL) {
4907
		error = row_table_add_foreign_constraints(trx,
4908
			thd->query, norm_name,
4909
			create_info->options & HA_LEX_CREATE_TMP_TABLE);
4910

4911
		error = convert_error_code_to_mysql(error, NULL);
4912

4913 4914
		if (error) {
			goto cleanup;
4915
		}
4916 4917
	}

4918
	innobase_commit_low(trx);
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4919

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heikki@hundin.mysql.fi committed
4920
	row_mysql_unlock_data_dictionary(trx);
4921

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Merge  
monty@donna.mysql.fi committed
4922 4923 4924
	/* 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 */
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monty@hundin.mysql.fi committed
4925

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heikki@hundin.mysql.fi committed
4926
	log_buffer_flush_to_disk();
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
4927

4928
	innobase_table = dict_table_get(norm_name);
4929

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monty@hundin.mysql.fi committed
4930
	DBUG_ASSERT(innobase_table != 0);
4931

4932 4933
	if ((create_info->used_fields & HA_CREATE_USED_AUTO) &&
	   (create_info->auto_increment_value != 0)) {
4934

4935
		/* Query was ALTER TABLE...AUTO_INCREMENT = x; or
4936
		CREATE TABLE ...AUTO_INCREMENT = x; Find out a table
4937 4938
		definition from the dictionary and get the current value
		of the auto increment field. Set a new value to the
4939 4940
		auto increment field if the value is greater than the
		maximum value in the column. */
4941

4942
		auto_inc_value = create_info->auto_increment_value;
4943 4944 4945
		dict_table_autoinc_initialize(innobase_table, auto_inc_value);
	}

4946
	/* Tell the InnoDB server that there might be work for
4947 4948 4949 4950
	utility threads: */

	srv_active_wake_master_thread();

4951
	trx_free_for_mysql(trx);
4952 4953

	DBUG_RETURN(0);
4954 4955 4956

cleanup:
	innobase_commit_low(trx);
4957

4958
	row_mysql_unlock_data_dictionary(trx);
4959

4960 4961 4962
	trx_free_for_mysql(trx);

	DBUG_RETURN(error);
4963 4964
}

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4965 4966 4967 4968 4969 4970 4971 4972 4973 4974
/*********************************************************************
Discards or imports an InnoDB tablespace. */

int
ha_innobase::discard_or_import_tablespace(
/*======================================*/
				/* out: 0 == success, -1 == error */
	my_bool discard)	/* in: TRUE if discard, else import */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
4975
	dict_table_t*	dict_table;
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4976 4977 4978
	trx_t*		trx;
	int		err;

4979
	DBUG_ENTER("ha_innobase::discard_or_import_tablespace");
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4980 4981 4982

	ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);
	ut_a(prebuilt->trx ==
4983
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
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4984

4985
	dict_table = prebuilt->table;
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heikki@hundin.mysql.fi committed
4986 4987 4988
	trx = prebuilt->trx;

	if (discard) {
4989
		err = row_discard_tablespace_for_mysql(dict_table->name, trx);
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heikki@hundin.mysql.fi committed
4990
	} else {
4991
		err = row_import_tablespace_for_mysql(dict_table->name, trx);
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4992 4993
	}

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4994
	err = convert_error_code_to_mysql(err, NULL);
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4995

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4996
	DBUG_RETURN(err);
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4997 4998
}

4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038
/*********************************************************************
Deletes all rows of an InnoDB table. */

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

	DBUG_ENTER("ha_innobase::delete_all_rows");

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

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

	trx = check_trx_exists(thd);

	/* Truncate the table in InnoDB */

	error = row_truncate_table_for_mysql(prebuilt->table, trx);
	if (error == DB_ERROR) {
		/* Cannot truncate; resort to ha_innobase::delete_row() */
		goto fallback;
	}

	error = convert_error_code_to_mysql(error, NULL);

	DBUG_RETURN(error);
}

5039
/*********************************************************************
5040
Drops a table from an InnoDB database. Before calling this function,
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
5041 5042
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
5043 5044
operation inside InnoDB will remove all locks any user has on the table
inside InnoDB. */
5045 5046 5047 5048

int
ha_innobase::delete_table(
/*======================*/
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5049 5050
				/* out: error number */
	const char*	name)	/* in: table name */
5051 5052 5053
{
	ulint	name_len;
	int	error;
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5054
	trx_t*	parent_trx;
5055
	trx_t*	trx;
5056
	THD	*thd= current_thd;
5057
	char	norm_name[1000];
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heikki@hundin.mysql.fi committed
5058

5059
	DBUG_ENTER("ha_innobase::delete_table");
5060

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heikki@hundin.mysql.fi committed
5061 5062
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
5063

5064
	parent_trx = check_trx_exists(thd);
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heikki@hundin.mysql.fi committed
5065 5066 5067 5068

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

5069
	trx_search_latch_release_if_reserved(parent_trx);
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heikki@hundin.mysql.fi committed
5070

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heikki@hundin.mysql.fi committed
5071 5072 5073 5074 5075 5076
	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

5077 5078
	trx = trx_allocate_for_mysql();

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5079 5080
	trx->mysql_thd = current_thd;
	trx->mysql_query_str = &((*current_thd).query);
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heikki@hundin.mysql.fi committed
5081

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heikki@hundin.mysql.fi committed
5082 5083 5084 5085 5086 5087 5088 5089
	if (thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
		trx->check_foreigns = FALSE;
	}

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

5090 5091 5092
	name_len = strlen(name);

	assert(name_len < 1000);
5093

5094 5095
	/* Strangely, MySQL passes the table name without the '.frm'
	extension, in contrast to ::create */
5096

5097 5098
	normalize_table_name(norm_name, name);

5099
	/* Drop the table in InnoDB */
5100

5101
	error = row_drop_table_for_mysql(norm_name, trx,
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monty@mishka.local committed
5102
		thd->lex->sql_command == SQLCOM_DROP_DB);
5103

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Merge  
monty@donna.mysql.fi committed
5104 5105 5106
	/* 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 */
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5107

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5108
	log_buffer_flush_to_disk();
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
5109

5110
	/* Tell the InnoDB server that there might be work for
5111 5112 5113 5114
	utility threads: */

	srv_active_wake_master_thread();

5115
	innobase_commit_low(trx);
heikki@donna.mysql.fi's avatar
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5116

5117
	trx_free_for_mysql(trx);
5118

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heikki@hundin.mysql.fi committed
5119
	error = convert_error_code_to_mysql(error, NULL);
5120 5121 5122 5123

	DBUG_RETURN(error);
}

5124 5125 5126
/*********************************************************************
Removes all tables in the named database inside InnoDB. */

5127
void
5128 5129 5130 5131 5132 5133 5134 5135 5136
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;
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5137
	trx_t*	parent_trx;
5138 5139 5140
	trx_t*	trx;
	char*	ptr;
	int	error;
5141
	char*	namebuf;
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monty@hundin.mysql.fi committed
5142

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5143 5144
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
5145

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5146
	parent_trx = check_trx_exists(current_thd);
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heikki@hundin.mysql.fi committed
5147 5148 5149 5150

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

5151
	trx_search_latch_release_if_reserved(parent_trx);
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heikki@hundin.mysql.fi committed
5152

5153
	ptr = strend(path) - 2;
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monty@hundin.mysql.fi committed
5154

5155 5156 5157 5158 5159 5160
	while (ptr >= path && *ptr != '\\' && *ptr != '/') {
		ptr--;
		len++;
	}

	ptr++;
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heikki@hundin.mysql.fi committed
5161
	namebuf = my_malloc((uint) len + 2, MYF(0));
5162 5163 5164 5165

	memcpy(namebuf, ptr, len);
	namebuf[len] = '/';
	namebuf[len + 1] = '\0';
5166
#ifdef	__WIN__
5167
	innobase_casedn_str(namebuf);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5168
#endif
5169
	trx = trx_allocate_for_mysql();
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heikki@hundin.mysql.fi committed
5170 5171
	trx->mysql_thd = current_thd;
	trx->mysql_query_str = &((*current_thd).query);
5172

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heikki@hundin.mysql.fi committed
5173 5174 5175 5176
	if (current_thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
		trx->check_foreigns = FALSE;
	}

5177
	error = row_drop_database_for_mysql(namebuf, trx);
5178
	my_free(namebuf, MYF(0));
5179

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
5180 5181 5182
	/* 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 */
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5183

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5184
	log_buffer_flush_to_disk();
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
5185

5186 5187 5188 5189 5190
	/* Tell the InnoDB server that there might be work for
	utility threads: */

	srv_active_wake_master_thread();

5191 5192 5193
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
#ifdef NO_LONGER_INTERESTED_IN_DROP_DB_ERROR
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heikki@hundin.mysql.fi committed
5194
	error = convert_error_code_to_mysql(error, NULL);
5195 5196

	return(error);
5197 5198 5199
#else
	return;
#endif
5200 5201
}

5202
/*************************************************************************
5203
Renames an InnoDB table. */
5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214

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;
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heikki@hundin.mysql.fi committed
5215
	trx_t*	parent_trx;
5216
	trx_t*	trx;
5217 5218
	char	norm_from[1000];
	char	norm_to[1000];
5219

5220
	DBUG_ENTER("ha_innobase::rename_table");
5221

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heikki@hundin.mysql.fi committed
5222 5223
	/* Get the transaction associated with the current thd, or create one
	if not yet created */
5224

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5225
	parent_trx = check_trx_exists(current_thd);
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heikki@hundin.mysql.fi committed
5226 5227 5228 5229

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

5230
	trx_search_latch_release_if_reserved(parent_trx);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5231

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heikki@hundin.mysql.fi committed
5232 5233 5234 5235 5236 5237
	if (lower_case_table_names) {
		srv_lower_case_table_names = TRUE;
	} else {
		srv_lower_case_table_names = FALSE;
	}

5238
	trx = trx_allocate_for_mysql();
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5239 5240
	trx->mysql_thd = current_thd;
	trx->mysql_query_str = &((*current_thd).query);
5241

5242 5243 5244 5245
	if (current_thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
		trx->check_foreigns = FALSE;
	}

5246 5247 5248 5249 5250
	name_len1 = strlen(from);
	name_len2 = strlen(to);

	assert(name_len1 < 1000);
	assert(name_len2 < 1000);
5251

5252 5253 5254
	normalize_table_name(norm_from, from);
	normalize_table_name(norm_to, to);

5255
	/* Rename the table in InnoDB */
5256

5257
	error = row_rename_table_for_mysql(norm_from, norm_to, trx);
5258

monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
5259 5260 5261
	/* 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 */
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5262

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5263
	log_buffer_flush_to_disk();
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
5264

5265
	/* Tell the InnoDB server that there might be work for
5266 5267 5268 5269
	utility threads: */

	srv_active_wake_master_thread();

5270 5271
	innobase_commit_low(trx);
	trx_free_for_mysql(trx);
5272

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5273
	error = convert_error_code_to_mysql(error, NULL);
5274 5275 5276 5277 5278 5279 5280 5281 5282 5283

	DBUG_RETURN(error);
}

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

ha_rows
ha_innobase::records_in_range(
/*==========================*/
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5284 5285
						/* out: estimated number of
						rows */
5286 5287 5288
	uint			keynr,		/* in: index number */
	key_range		*min_key,	/* in: start key value of the
						   range, may also be 0 */
5289
	key_range		*max_key)	/* in: range end key val, may
5290
						   also be 0 */
5291 5292 5293 5294
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	KEY*		key;
	dict_index_t*	index;
5295
	mysql_byte*	key_val_buff2	= (mysql_byte*) my_malloc(
5296
						  table->s->reclength
5297
					+ table->s->max_key_length + 100,
osku@127.(none)'s avatar
osku@127.(none) committed
5298
								MYF(MY_FAE));
5299
	ulint		buff2_len = table->s->reclength
5300
					+ table->s->max_key_length + 100;
5301
	dtuple_t*	range_start;
5302
	dtuple_t*	range_end;
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5303
	ib_longlong	n_rows;
5304 5305
	ulint		mode1;
	ulint		mode2;
5306 5307
	void*		heap1;
	void*		heap2;
5308

5309
	DBUG_ENTER("records_in_range");
5310

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5311 5312
	prebuilt->trx->op_info = (char*)"estimating records in index range";

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heikki@hundin.mysql.fi committed
5313 5314 5315 5316
	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	trx_search_latch_release_if_reserved(prebuilt->trx);
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monty@hundin.mysql.fi committed
5317

5318 5319 5320
	active_index = keynr;

	key = table->key_info + active_index;
5321

5322
	index = dict_table_get_index_noninline(prebuilt->table, key->name);
5323

5324
	range_start = dtuple_create_for_mysql(&heap1, key->key_parts);
5325
	dict_index_copy_types(range_start, index, key->key_parts);
5326

5327
	range_end = dtuple_create_for_mysql(&heap2, key->key_parts);
5328
	dict_index_copy_types(range_end, index, key->key_parts);
5329

5330
	row_sel_convert_mysql_key_to_innobase(
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heikki@hundin.mysql.fi committed
5331 5332 5333
				range_start, (byte*) key_val_buff,
				(ulint)upd_and_key_val_buff_len,
				index,
5334
				(byte*) (min_key ? min_key->key :
5335
					 (const mysql_byte*) 0),
5336 5337
				(ulint) (min_key ? min_key->length : 0),
				prebuilt->trx);
5338

5339
	row_sel_convert_mysql_key_to_innobase(
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heikki@hundin.mysql.fi committed
5340 5341
				range_end, (byte*) key_val_buff2,
				buff2_len, index,
5342
				(byte*) (max_key ? max_key->key :
5343
					 (const mysql_byte*) 0),
5344 5345
				(ulint) (max_key ? max_key->length : 0),
				prebuilt->trx);
5346 5347

	mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag :
5348
						HA_READ_KEY_EXACT);
5349
	mode2 = convert_search_mode_to_innobase(max_key ? max_key->flag :
5350
						HA_READ_KEY_EXACT);
5351

5352
	n_rows = btr_estimate_n_rows_in_range(index, range_start,
5353
						mode1, range_end, mode2);
5354 5355
	dtuple_free_for_mysql(heap1);
	dtuple_free_for_mysql(heap2);
5356

5357
	my_free((gptr) key_val_buff2, MYF(0));
5358

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5359 5360
	prebuilt->trx->op_info = (char*)"";

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5361 5362 5363 5364 5365 5366 5367
	/* The MySQL optimizer seems to believe an estimate of 0 rows is
	always accurate and may return the result 'Empty set' based on that.
	The accuracy is not guaranteed, and even if it were, for a locking
	read we should anyway perform the search to set the next-key lock.
	Add 1 to the value to make sure MySQL does not make the assumption! */

	if (n_rows == 0) {
5368
		n_rows = 1;
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5369 5370
	}

5371 5372 5373
	DBUG_RETURN((ha_rows) n_rows);
}

5374 5375
/*************************************************************************
Gives an UPPER BOUND to the number of rows in a table. This is used in
5376
filesort.cc. */
5377 5378

ha_rows
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5379
ha_innobase::estimate_rows_upper_bound(void)
5380
/*======================================*/
5381
			/* out: upper bound of rows */
5382 5383
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
5384 5385
	dict_index_t*	index;
	ulonglong	estimate;
5386
	ulonglong	local_data_file_length;
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monty@hundin.mysql.fi committed
5387

5388
	DBUG_ENTER("estimate_rows_upper_bound");
5389

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heikki@hundin.mysql.fi committed
5390 5391 5392 5393 5394 5395
	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

	update_thd(current_thd);

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5396
	prebuilt->trx->op_info = (char*)
5397
				 "calculating upper bound for table rows";
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heikki@hundin.mysql.fi committed
5398

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5399 5400 5401 5402
	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	trx_search_latch_release_if_reserved(prebuilt->trx);
5403

5404
	index = dict_table_get_first_index_noninline(prebuilt->table);
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5405

5406
	local_data_file_length = ((ulonglong) index->stat_n_leaf_pages)
5407
							* UNIV_PAGE_SIZE;
5408

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heikki@donna.mysql.fi committed
5409 5410
	/* Calculate a minimum length for a clustered index record and from
	that an upper bound for the number of rows. Since we only calculate
5411 5412
	new statistics in row0mysql.c when a table has grown by a threshold
	factor, we must add a safety factor 2 in front of the formula below. */
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5413

5414 5415
	estimate = 2 * local_data_file_length /
					 dict_index_calc_min_rec_len(index);
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5416

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5417 5418
	prebuilt->trx->op_info = (char*)"";

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5419
	DBUG_RETURN((ha_rows) estimate);
5420 5421
}

5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433
/*************************************************************************
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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5434 5435 5436 5437
	/* Since MySQL seems to favor table scans too much over index
	searches, we pretend that a sequential read takes the same time
	as a random disk read, that is, we do not divide the following
	by 10, which would be physically realistic. */
5438

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5439
	return((double) (prebuilt->table->stat_clustered_index_size));
5440 5441
}

5442 5443 5444
/**********************************************************************
Calculate the time it takes to read a set of ranges through an index
This enables us to optimise reads for clustered indexes. */
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5445

5446 5447 5448 5449
double
ha_innobase::read_time(
/*===================*/
			/* out: estimated time measured in disk seeks */
5450
	uint	index,	/* in: key number */
5451 5452
	uint	ranges,	/* in: how many ranges */
	ha_rows rows)	/* in: estimated number of rows in the ranges */
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monty@narttu.mysql.fi committed
5453
{
5454
	ha_rows total_rows;
5455 5456
	double	time_for_scan;

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5457
	if (index != table->s->primary_key) {
5458 5459
		/* Not clustered */
		return(handler::read_time(index, ranges, rows));
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5460
	}
5461

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heikki@hundin.mysql.fi committed
5462
	if (rows <= 2) {
5463

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5464 5465
		return((double) rows);
	}
5466 5467 5468 5469

	/* Assume that the read time is proportional to the scan time for all
	rows + at most one seek per range. */

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5470
	time_for_scan = scan_time();
5471

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heikki@hundin.mysql.fi committed
5472
	if ((total_rows = estimate_rows_upper_bound()) < rows) {
5473

5474
		return(time_for_scan);
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heikki@hundin.mysql.fi committed
5475
	}
5476

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heikki@hundin.mysql.fi committed
5477
	return(ranges + (double) rows / (double) total_rows * time_for_scan);
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5478 5479
}

5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491
/*************************************************************************
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;
5492
	ha_rows		rec_per_key;
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5493
	ib_longlong	n_rows;
5494 5495
	ulong		j;
	ulong		i;
5496
	char		path[FN_REFLEN];
5497
	os_file_stat_t	stat_info;
5498

5499
	DBUG_ENTER("info");
5500

5501
	/* If we are forcing recovery at a high level, we will suppress
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5502 5503 5504
	statistics calculation on tables, because that may crash the
	server if an index is badly corrupted. */

5505
	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {
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heikki@hundin.mysql.fi committed
5506

5507 5508
		DBUG_VOID_RETURN;
	}
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5509

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heikki@hundin.mysql.fi committed
5510 5511 5512 5513 5514 5515 5516 5517 5518
	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

	update_thd(current_thd);

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

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heikki@hundin.mysql.fi committed
5519 5520
	prebuilt->trx->op_info = (char*)"returning various info to MySQL";

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heikki@hundin.mysql.fi committed
5521
	trx_search_latch_release_if_reserved(prebuilt->trx);
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monty@hundin.mysql.fi committed
5522

5523
	ib_table = prebuilt->table;
5524

5525 5526 5527
	if (flag & HA_STATUS_TIME) {
		/* In sql_show we call with this flag: update then statistics
		so that they are up-to-date */
5528

5529
		prebuilt->trx->op_info = (char*)"updating table statistics";
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heikki@hundin.mysql.fi committed
5530

5531
		dict_update_statistics(ib_table);
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heikki@hundin.mysql.fi committed
5532 5533

		prebuilt->trx->op_info = (char*)
5534
					  "returning various info to MySQL";
5535 5536 5537

		if (ib_table->space != 0) {
			my_snprintf(path, sizeof(path), "%s/%s%s",
5538
				mysql_data_home, ib_table->name, ".ibd");
5539 5540
			unpack_filename(path,path);
		} else {
5541 5542 5543
			my_snprintf(path, sizeof(path), "%s/%s%s",
				mysql_data_home, ib_table->name, reg_ext);

5544 5545 5546
			unpack_filename(path,path);
		}

5547
		/* Note that we do not know the access time of the table,
5548 5549
		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */

5550
		if (os_file_get_status(path,&stat_info)) {
5551
			stats.create_time = stat_info.ctime;
5552
		}
5553
	}
5554 5555

	if (flag & HA_STATUS_VARIABLE) {
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5556 5557 5558 5559 5560 5561 5562 5563 5564 5565
		n_rows = ib_table->stat_n_rows;

		/* Because we do not protect stat_n_rows by any mutex in a
		delete, it is theoretically possible that the value can be
		smaller than zero! TODO: fix this race.

		The MySQL optimizer seems to assume in a left join that n_rows
		is an accurate estimate if it is zero. Of course, it is not,
		since we do not have any locks on the rows yet at this phase.
		Since SHOW TABLE STATUS seems to call this function with the
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heikki@hundin.mysql.fi committed
5566
		HA_STATUS_TIME flag set, while the left join optimizer does not
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5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578
		set that flag, we add one to a zero value if the flag is not
		set. That way SHOW TABLE STATUS will show the best estimate,
		while the optimizer never sees the table empty. */

		if (n_rows < 0) {
			n_rows = 0;
		}

		if (n_rows == 0 && !(flag & HA_STATUS_TIME)) {
			n_rows++;
		}

5579 5580 5581
		stats.records = (ha_rows)n_rows;
		stats.deleted = 0;
		stats.data_file_length = ((ulonglong)
5582
				ib_table->stat_clustered_index_size)
5583
					* UNIV_PAGE_SIZE;
5584
		stats.index_file_length = ((ulonglong)
5585
				ib_table->stat_sum_of_other_index_sizes)
5586
					* UNIV_PAGE_SIZE;
5587 5588
		stats.delete_length = 0;
		stats.check_time = 0;
5589

5590 5591
		if (stats.records == 0) {
			stats.mean_rec_length = 0;
5592
		} else {
5593
			stats.mean_rec_length = (ulong) (stats.data_file_length / stats.records);
5594 5595
		}
	}
5596 5597 5598 5599 5600 5601 5602

	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);
		}
5603

5604
		for (i = 0; i < table->s->keys; i++) {
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heikki@hundin.mysql.fi committed
5605 5606
			if (index == NULL) {
				ut_print_timestamp(stderr);
5607 5608 5609 5610 5611 5612 5613 5614
				sql_print_error("Table %s contains less "
						"indexes inside InnoDB than "
						"are defined in the MySQL "
						".frm file. Have you mixed up "
						".frm files from different "
						"installations? See section "
						"15.1 at http://www.innodb.com/ibman.html",
						ib_table->name);
heikki@hundin.mysql.fi's avatar
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5615 5616 5617
				break;
			}

5618 5619
			for (j = 0; j < table->key_info[i].key_parts; j++) {

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5620
				if (j + 1 > index->n_uniq) {
5621
					ut_print_timestamp(stderr);
5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636
					sql_print_error("Index %s of %s has "
							"%lu columns unique "
							"inside InnoDB, but "
							"MySQL is asking "
							"statistics for %lu "
							"columns. Have you "
							"mixed up .frm files "
							"from different "
							"installations? See "
							"section 15.1 at "
							"http://www.innodb.com/ibman.html",
							index->name,
							ib_table->name,
							(unsigned long)
							index->n_uniq, j + 1);
5637
					break;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5638 5639
				}

5640 5641
				if (index->stat_n_diff_key_vals[j + 1] == 0) {

5642
					rec_per_key = stats.records;
5643
				} else {
5644
					rec_per_key = (ha_rows)(stats.records /
5645
					 index->stat_n_diff_key_vals[j + 1]);
5646 5647
				}

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
5648 5649 5650 5651 5652 5653 5654
				/* Since MySQL seems to favor table scans
				too much over index searches, we pretend
				index selectivity is 2 times better than
				our estimate: */

				rec_per_key = rec_per_key / 2;

5655 5656 5657
				if (rec_per_key == 0) {
					rec_per_key = 1;
				}
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5658

5659
				table->key_info[i].rec_per_key[j]=
5660 5661
				  rec_per_key >= ~(ulong) 0 ? ~(ulong) 0 :
				  rec_per_key;
5662
			}
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monty@hundin.mysql.fi committed
5663

5664
			index = dict_table_get_next_index_noninline(index);
5665 5666
		}
	}
5667

5668
	if (flag & HA_STATUS_ERRKEY) {
heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
5669 5670
		ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);

5671
		errkey = (unsigned int) row_get_mysql_key_number_for_index(
5672 5673
			(dict_index_t*) trx_get_error_info(prebuilt->trx));
	}
5674

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heikki@hundin.mysql.fi committed
5675 5676 5677 5678 5679 5680
	if (flag & HA_STATUS_AUTO && table->found_next_number_field) {
		longlong	auto_inc;
		int		ret;

		/* The following function call can the first time fail in
		a lock wait timeout error because it reserves the auto-inc
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5681
		lock on the table. If it fails, then someone is already initing
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heikki@hundin.mysql.fi committed
5682 5683 5684
		the auto-inc counter, and the second call is guaranteed to
		succeed. */

5685
		ret = innobase_read_and_init_auto_inc(&auto_inc);
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5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697

		if (ret != 0) {
			ret = innobase_read_and_init_auto_inc(&auto_inc);

			if (ret != 0) {
				ut_print_timestamp(stderr);
				sql_print_error("Cannot get table %s auto-inc"
						"counter value in ::info\n",
						ib_table->name);
				auto_inc = 0;
			}
		}
5698

5699
		stats.auto_increment_value = auto_inc;
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heikki@hundin.mysql.fi committed
5700 5701
	}

heikki@hundin.mysql.fi's avatar
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5702 5703
	prebuilt->trx->op_info = (char*)"";

5704
	DBUG_VOID_RETURN;
5705 5706
}

5707
/**************************************************************************
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5708 5709
Updates index cardinalities of the table, based on 8 random dives into
each index tree. This does NOT calculate exact statistics on the table. */
5710 5711 5712

int
ha_innobase::analyze(
5713
/*=================*/
5714 5715 5716 5717 5718 5719 5720 5721 5722 5723
					/* out: returns always 0 (success) */
	THD*		thd,		/* in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: currently ignored */
{
	/* Simply call ::info() with all the flags */
	info(HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE);

	return(0);
}

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heikki@hundin.mysql.fi committed
5724
/**************************************************************************
5725
This is mapped to "ALTER TABLE tablename ENGINE=InnoDB", which rebuilds
5726
the table in MySQL. */
5727

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5728 5729 5730 5731 5732
int
ha_innobase::optimize(
/*==================*/
	THD*		thd,		/* in: connection thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: currently ignored */
5733
{
5734
	return(HA_ADMIN_TRY_ALTER);
5735 5736
}

5737 5738 5739 5740 5741 5742 5743 5744 5745 5746
/***********************************************************************
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 */
5747 5748
	THD*		thd,		/* in: user thread handle */
	HA_CHECK_OPT*	check_opt)	/* in: check options, currently
5749 5750 5751 5752
					ignored */
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	ulint		ret;
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5753

heikki@donna.mysql.fi's avatar
heikki@donna.mysql.fi committed
5754
	ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5755
	ut_a(prebuilt->trx ==
5756
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
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heikki@donna.mysql.fi committed
5757

5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769
	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);
	}
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5770

5771
	return(HA_ADMIN_CORRUPT);
5772 5773
}

5774
/*****************************************************************
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
5775 5776 5777
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. */
5778 5779 5780 5781

char*
ha_innobase::update_table_comment(
/*==============================*/
monty@donna.mysql.fi's avatar
Merge  
monty@donna.mysql.fi committed
5782 5783
				/* out: table comment + InnoDB free space +
				info on foreign keys */
5784
	const char*	comment)/* in: table comment defined by user */
5785
{
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heikki@hundin.mysql.fi committed
5786
	uint	length			= (uint) strlen(comment);
5787 5788
	char*				str;
	row_prebuilt_t*	prebuilt	= (row_prebuilt_t*)innobase_prebuilt;
5789
	long	flen;
5790

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heikki@hundin.mysql.fi committed
5791 5792 5793 5794
	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

monty@mishka.local's avatar
monty@mishka.local committed
5795
	if (length > 64000 - 3) {
5796 5797 5798
		return((char*)comment); /* string too long */
	}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
5799 5800
	update_thd(current_thd);

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heikki@hundin.mysql.fi committed
5801 5802
	prebuilt->trx->op_info = (char*)"returning table comment";

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heikki@hundin.mysql.fi committed
5803 5804 5805 5806
	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	trx_search_latch_release_if_reserved(prebuilt->trx);
5807
	str = NULL;
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heikki@hundin.mysql.fi committed
5808

5809
	/* output the data to a temporary file */
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Merge  
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	mutex_enter_noninline(&srv_dict_tmpfile_mutex);
	rewind(srv_dict_tmpfile);
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	fprintf(srv_dict_tmpfile, "InnoDB free: %lu kB",
		   (ulong) fsp_get_available_space_in_free_extents(
					prebuilt->table->space));

	dict_print_info_on_foreign_keys(FALSE, srv_dict_tmpfile,
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				prebuilt->trx, prebuilt->table);
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	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	} else if (length + flen + 3 > 64000) {
		flen = 64000 - 3 - length;
	}
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	/* allocate buffer for the full string, and
	read the contents of the temporary file */
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	str = my_malloc(length + flen + 3, MYF(0));
5831

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	if (str) {
		char* pos	= str + length;
		if (length) {
			memcpy(str, comment, length);
			*pos++ = ';';
			*pos++ = ' ';
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		}
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		rewind(srv_dict_tmpfile);
		flen = (uint) fread(pos, 1, flen, srv_dict_tmpfile);
		pos[flen] = 0;
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	}
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	mutex_exit_noninline(&srv_dict_tmpfile_mutex);

	prebuilt->trx->op_info = (char*)"";
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	return(str ? str : (char*) comment);
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}

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/***********************************************************************
Gets the foreign key create info for a table stored in InnoDB. */

char*
ha_innobase::get_foreign_key_create_info(void)
/*==========================================*/
			/* out, own: character string in the form which
			can be inserted to the CREATE TABLE statement,
			MUST be freed with ::free_foreign_key_create_info */
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
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	char*	str	= 0;
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	long	flen;
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	ut_a(prebuilt != NULL);
5866

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	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

	update_thd(current_thd);

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	prebuilt->trx->op_info = (char*)"getting info on foreign keys";
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	/* In case MySQL calls this in the middle of a SELECT query,
	release possible adaptive hash latch to avoid
	deadlocks of threads */
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	trx_search_latch_release_if_reserved(prebuilt->trx);
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	mutex_enter_noninline(&srv_dict_tmpfile_mutex);
	rewind(srv_dict_tmpfile);
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	/* output the data to a temporary file */
	dict_print_info_on_foreign_keys(TRUE, srv_dict_tmpfile,
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				prebuilt->trx, prebuilt->table);
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	prebuilt->trx->op_info = (char*)"";
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	flen = ftell(srv_dict_tmpfile);
	if (flen < 0) {
		flen = 0;
	} else if (flen > 64000 - 1) {
		flen = 64000 - 1;
	}
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	/* allocate buffer for the string, and
	read the contents of the temporary file */
5898

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	str = my_malloc(flen + 1, MYF(0));
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	if (str) {
		rewind(srv_dict_tmpfile);
		flen = (uint) fread(str, 1, flen, srv_dict_tmpfile);
		str[flen] = 0;
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	}
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	mutex_exit_noninline(&srv_dict_tmpfile_mutex);

	return(str);
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}
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int
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ha_innobase::get_foreign_key_list(THD *thd, List<FOREIGN_KEY_INFO> *f_key_list)
{
  dict_foreign_t* foreign;

  DBUG_ENTER("get_foreign_key_list");
  row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
  ut_a(prebuilt != NULL);
  update_thd(current_thd);
  prebuilt->trx->op_info = (char*)"getting list of foreign keys";
  trx_search_latch_release_if_reserved(prebuilt->trx);
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  mutex_enter_noninline(&(dict_sys->mutex));
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  foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list);

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  while (foreign != NULL) {
	  uint i;
	  FOREIGN_KEY_INFO f_key_info;
	  LEX_STRING *name= 0;
	  const char *tmp_buff;

	  tmp_buff= foreign->id;
	  i= 0;
	  while (tmp_buff[i] != '/')
		  i++;
	  tmp_buff+= i + 1;
	  f_key_info.forein_id= make_lex_string(thd, 0, tmp_buff,
		  (uint) strlen(tmp_buff), 1);
	  tmp_buff= foreign->referenced_table_name;
	  i= 0;
	  while (tmp_buff[i] != '/')
		  i++;
	  f_key_info.referenced_db= make_lex_string(thd, 0,
		  tmp_buff, i, 1);
	  tmp_buff+= i + 1;
	  f_key_info.referenced_table= make_lex_string(thd, 0, tmp_buff,
		  (uint) strlen(tmp_buff), 1);

	  for (i= 0;;) {
		  tmp_buff= foreign->foreign_col_names[i];
		  name= make_lex_string(thd, name, tmp_buff,
			  (uint) strlen(tmp_buff), 1);
		  f_key_info.foreign_fields.push_back(name);
		  tmp_buff= foreign->referenced_col_names[i];
		  name= make_lex_string(thd, name, tmp_buff,
			  (uint) strlen(tmp_buff), 1);
		  f_key_info.referenced_fields.push_back(name);
		  if (++i >= foreign->n_fields)
			  break;
	  }

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          ulong length;
          if (foreign->type & DICT_FOREIGN_ON_DELETE_CASCADE)
          {
            length=7;
            tmp_buff= "CASCADE";
          }	
          else if (foreign->type & DICT_FOREIGN_ON_DELETE_SET_NULL)
          {
            length=8;
            tmp_buff= "SET NULL";
          }
          else if (foreign->type & DICT_FOREIGN_ON_DELETE_NO_ACTION)
          {
            length=9;
            tmp_buff= "NO ACTION";
          }
          else
          {
            length=8;
            tmp_buff= "RESTRICT";
          }
          f_key_info.delete_method= make_lex_string(thd, f_key_info.delete_method,
                                                    tmp_buff, length, 1);
 
 
          if (foreign->type & DICT_FOREIGN_ON_UPDATE_CASCADE)
          {
            length=7;
            tmp_buff= "CASCADE";
          }
          else if (foreign->type & DICT_FOREIGN_ON_UPDATE_SET_NULL)
          {
            length=8;
            tmp_buff= "SET NULL";
          }
          else if (foreign->type & DICT_FOREIGN_ON_UPDATE_NO_ACTION)
          {
            length=9;
            tmp_buff= "NO ACTION";
          }
          else
          {
            length=8;
            tmp_buff= "RESTRICT";
          }
          f_key_info.update_method= make_lex_string(thd, f_key_info.update_method,
                                                    tmp_buff, length, 1);


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	  FOREIGN_KEY_INFO *pf_key_info= ((FOREIGN_KEY_INFO *)
		  thd->memdup((gptr) &f_key_info,
			  sizeof(FOREIGN_KEY_INFO)));
	  f_key_list->push_back(pf_key_info);
	  foreign = UT_LIST_GET_NEXT(foreign_list, foreign);
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  }
6019
  mutex_exit_noninline(&(dict_sys->mutex));
6020
  prebuilt->trx->op_info = (char*)"";
6021

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  DBUG_RETURN(0);
}

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/*********************************************************************
Checks if ALTER TABLE may change the storage engine of the table.
Changing storage engines is not allowed for tables for which there
are foreign key constraints (parent or child tables). */

bool
ha_innobase::can_switch_engines(void)
/*=================================*/
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	bool	can_switch;

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	DBUG_ENTER("ha_innobase::can_switch_engines");
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	prebuilt->trx->op_info =
			"determining if there are foreign key constraints";
	row_mysql_lock_data_dictionary(prebuilt->trx);

	can_switch = !UT_LIST_GET_FIRST(prebuilt->table->referenced_list)
			&& !UT_LIST_GET_FIRST(prebuilt->table->foreign_list);

	row_mysql_unlock_data_dictionary(prebuilt->trx);
	prebuilt->trx->op_info = "";

	DBUG_RETURN(can_switch);
}

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/***********************************************************************
Checks if a table is referenced by a foreign key. The MySQL manual states that
a REPLACE is either equivalent to an INSERT, or DELETE(s) + INSERT. Only a
delete is then allowed internally to resolve a duplicate key conflict in
REPLACE, not an update. */

uint
ha_innobase::referenced_by_foreign_key(void)
/*========================================*/
			/* out: > 0 if referenced by a FOREIGN KEY */
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;

	if (dict_table_referenced_by_foreign_key(prebuilt->table)) {

		return(1);
	}

	return(0);
}
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/***********************************************************************
Frees the foreign key create info for a table stored in InnoDB, if it is
non-NULL. */

void
ha_innobase::free_foreign_key_create_info(
/*======================================*/
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	char*	str)	/* in, own: create info string to free	*/
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{
	if (str) {
6082
		my_free(str, MYF(0));
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	}
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}

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

int
ha_innobase::extra(
/*===============*/
			   /* out: 0 or error number */
	enum ha_extra_function operation)
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			   /* in: HA_EXTRA_FLUSH or some other flag */
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{
	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;

	/* Warning: since it is not sure that MySQL calls external_lock
	before calling this function, the trx field in prebuilt can be
	obsolete! */

	switch (operation) {
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		case HA_EXTRA_FLUSH:
			if (prebuilt->blob_heap) {
				row_mysql_prebuilt_free_blob_heap(prebuilt);
			}
			break;
		case HA_EXTRA_RESET_STATE:
			prebuilt->keep_other_fields_on_keyread = 0;
			prebuilt->read_just_key = 0;
			break;
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		case HA_EXTRA_NO_KEYREAD:
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			prebuilt->read_just_key = 0;
			break;
		case HA_EXTRA_KEYREAD:
			prebuilt->read_just_key = 1;
			break;
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		case HA_EXTRA_KEYREAD_PRESERVE_FIELDS:
			prebuilt->keep_other_fields_on_keyread = 1;
			break;
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		default:/* Do nothing */
			;
	}

	return(0);
}

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int ha_innobase::reset()
{
  row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
  if (prebuilt->blob_heap) {
    row_mysql_prebuilt_free_blob_heap(prebuilt);
  }
  prebuilt->keep_other_fields_on_keyread = 0;
  prebuilt->read_just_key = 0;
  return 0;
}


6140
/**********************************************************************
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MySQL calls this function at the start of each SQL statement inside LOCK
TABLES. Inside LOCK TABLES the ::external_lock method does not work to
mark SQL statement borders. Note also a special case: if a temporary table
is created inside LOCK TABLES, MySQL has not called external_lock() at all
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on that table.
MySQL-5.0 also calls this before each statement in an execution of a stored
procedure. To make the execution more deterministic for binlogging, MySQL-5.0
locks all tables involved in a stored procedure with full explicit table
locks (thd->in_lock_tables is true in ::store_lock()) before executing the
procedure. */
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int
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ha_innobase::start_stmt(
/*====================*/
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				/* out: 0 or error code */
	THD*		thd,	/* in: handle to the user thread */
	thr_lock_type	lock_type)
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{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	trx_t*		trx;

	update_thd(thd);

	trx = prebuilt->trx;

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	/* Here we release the search latch and the InnoDB thread FIFO ticket
	if they were reserved. They should have been released already at the
	end of the previous statement, but because inside LOCK TABLES the
	lock count method does not work to mark the end of a SELECT statement,
	that may not be the case. We MUST release the search latch before an
	INSERT, for example. */

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	innobase_release_stat_resources(trx);

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	if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
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						&& trx->global_read_view) {
		/* At low transaction isolation levels we let
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		each consistent read set its own snapshot */

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		read_view_close_for_mysql(trx);
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	}

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	prebuilt->sql_stat_start = TRUE;
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	prebuilt->hint_need_to_fetch_extra_cols = 0;
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	prebuilt->read_just_key = 0;
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	prebuilt->keep_other_fields_on_keyread = FALSE;
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	if (!prebuilt->mysql_has_locked) {
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		/* This handle is for a temporary table created inside
		this same LOCK TABLES; since MySQL does NOT call external_lock
		in this case, we must use x-row locks inside InnoDB to be
		prepared for an update of a row */

		prebuilt->select_lock_type = LOCK_X;
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	} else {
		if (trx->isolation_level != TRX_ISO_SERIALIZABLE
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			&& thd->lex->sql_command == SQLCOM_SELECT
			&& lock_type == TL_READ) {

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			/* For other than temporary tables, we obtain
			no lock for consistent read (plain SELECT). */

			prebuilt->select_lock_type = LOCK_NONE;
		} else {
			/* Not a consistent read: restore the
			select_lock_type value. The value of
			stored_select_lock_type was decided in:
			1) ::store_lock(),
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			2) ::external_lock(),
			3) ::init_table_handle_for_HANDLER(), and
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			4) :.transactional_table_lock(). */
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			prebuilt->select_lock_type =
				prebuilt->stored_select_lock_type;
		}

		if (prebuilt->stored_select_lock_type != LOCK_S
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			&& prebuilt->stored_select_lock_type != LOCK_X) {
			sql_print_error(
				"stored_select_lock_type is %lu inside "
				"::start_stmt()!",
				prebuilt->stored_select_lock_type);
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			/* Set the value to LOCK_X: this is just fault
			tolerance, we do not know what the correct value
			should be! */

			prebuilt->select_lock_type = LOCK_X;
		}
	}

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	trx->detailed_error[0] = '\0';

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	/* Set the MySQL flag to mark that there is an active transaction */
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	if (trx->active_trans == 0) {
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		innobase_register_trx_and_stmt(thd);
		trx->active_trans = 1;
	} else {
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		innobase_register_stmt(thd);
	}
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	return(0);
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}

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/**********************************************************************
Maps a MySQL trx isolation level code to the InnoDB isolation level code */
inline
ulint
innobase_map_isolation_level(
/*=========================*/
					/* out: InnoDB isolation level */
	enum_tx_isolation	iso)	/* in: MySQL isolation level code */
{
	switch(iso) {
		case ISO_REPEATABLE_READ: return(TRX_ISO_REPEATABLE_READ);
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		case ISO_READ_COMMITTED: return(TRX_ISO_READ_COMMITTED);
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		case ISO_SERIALIZABLE: return(TRX_ISO_SERIALIZABLE);
		case ISO_READ_UNCOMMITTED: return(TRX_ISO_READ_UNCOMMITTED);
		default: ut_a(0); return(0);
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	}
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}
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/**********************************************************************
As MySQL will execute an external lock for every new table it uses when it
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starts to process an SQL statement (an exception is when MySQL calls
start_stmt for the handle) we can use this function to store the pointer to
the THD in the handle. We will also use this function to communicate
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to InnoDB that a new SQL statement has started and that we must store a
savepoint to our transaction handle, so that we are able to roll back
the SQL statement in case of an error. */

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

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	DBUG_ENTER("ha_innobase::external_lock");
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	DBUG_PRINT("enter",("lock_type: %d", lock_type));
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	update_thd(thd);

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
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	prebuilt->hint_need_to_fetch_extra_cols = 0;
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	prebuilt->read_just_key = 0;
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	prebuilt->keep_other_fields_on_keyread = FALSE;
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	if (lock_type == F_WRLCK) {

		/* If this is a SELECT, then it is in UPDATE TABLE ...
		or SELECT ... FOR UPDATE */
		prebuilt->select_lock_type = LOCK_X;
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		prebuilt->stored_select_lock_type = LOCK_X;
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	}

	if (lock_type != F_UNLCK) {
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		/* MySQL is setting a new table lock */
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		trx->detailed_error[0] = '\0';
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		/* Set the MySQL flag to mark that there is an active
		transaction */
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		if (trx->active_trans == 0) {
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			innobase_register_trx_and_stmt(thd);
			trx->active_trans = 1;
		} else if (trx->n_mysql_tables_in_use == 0) {
6316 6317
			innobase_register_stmt(thd);
		}
6318

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6319
		trx->n_mysql_tables_in_use++;
6320
		prebuilt->mysql_has_locked = TRUE;
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6321

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6322
		if (trx->isolation_level == TRX_ISO_SERIALIZABLE
6323 6324
			&& prebuilt->select_lock_type == LOCK_NONE
			&& (thd->options
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6325
				& (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
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6326

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6327 6328
			/* To get serializable execution, we let InnoDB
			conceptually add 'LOCK IN SHARE MODE' to all SELECTs
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6329 6330 6331 6332 6333
			which otherwise would have been consistent reads. An
			exception is consistent reads in the AUTOCOMMIT=1 mode:
			we know that they are read-only transactions, and they
			can be serialized also if performed as consistent
			reads. */
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			prebuilt->select_lock_type = LOCK_S;
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6336
			prebuilt->stored_select_lock_type = LOCK_S;
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		}

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		/* Starting from 4.1.9, no InnoDB table lock is taken in LOCK
		TABLES if AUTOCOMMIT=1. It does not make much sense to acquire
		an InnoDB table lock if it is released immediately at the end
		of LOCK TABLES, and InnoDB's table locks in that case cause
6343 6344 6345 6346 6347 6348
		VERY easily deadlocks.

		We do not set InnoDB table locks if user has not explicitly
		requested a table lock. Note that thd->in_lock_tables
		can  be TRUE on some cases e.g. at the start of a stored
		procedure call (SQLCOM_CALL). */
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6349

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6350
		if (prebuilt->select_lock_type != LOCK_NONE) {
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6351

6352
			if (thd->in_lock_tables &&
6353 6354 6355
				thd->lex->sql_command == SQLCOM_LOCK_TABLES &&
				thd->variables.innodb_table_locks &&
				(thd->options & OPTION_NOT_AUTOCOMMIT)) {
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6356

6357 6358
				ulint	error = row_lock_table_for_mysql(
					prebuilt, NULL, 0);
6359 6360 6361

				if (error != DB_SUCCESS) {
					error = convert_error_code_to_mysql(
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heikki@hundin.mysql.fi committed
6362 6363
						(int) error, user_thd);
					DBUG_RETURN((int) error);
6364 6365
				}
			}
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6366

6367
			trx->mysql_n_tables_locked++;
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		}

6370
		DBUG_RETURN(0);
6371
	}
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6372

6373
	/* MySQL is releasing a table lock */
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6374

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	trx->n_mysql_tables_in_use--;
	prebuilt->mysql_has_locked = FALSE;
6377

6378 6379
	/* If the MySQL lock count drops to zero we know that the current SQL
	statement has ended */
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6380

6381
	if (trx->n_mysql_tables_in_use == 0) {
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6382

6383
		trx->mysql_n_tables_locked = 0;
6384
		prebuilt->used_in_HANDLER = FALSE;
6385

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heikki@hundin.mysql.fi committed
6386 6387 6388 6389
		/* Release a possible FIFO ticket and search latch. Since we
		may reserve the kernel mutex, we have to release the search
		system latch first to obey the latching order. */

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6390
		innobase_release_stat_resources(trx);
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6391

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6392
		if (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
6393 6394
			if (trx->active_trans != 0) {
				innobase_commit(thd, TRUE);
6395 6396
			}
		} else {
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heikki@hundin.mysql.fi committed
6397
			if (trx->isolation_level <= TRX_ISO_READ_COMMITTED
6398
						&& trx->global_read_view) {
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6400
				/* At low transaction isolation levels we let
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6401 6402
				each consistent read set its own snapshot */

6403
				read_view_close_for_mysql(trx);
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6404
			}
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		}
	}

6408
	DBUG_RETURN(0);
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6409 6410
}

6411 6412 6413 6414 6415 6416 6417
/**********************************************************************
With this function MySQL request a transactional lock to a table when
user issued query LOCK TABLES..WHERE ENGINE = InnoDB. */

int
ha_innobase::transactional_table_lock(
/*==================================*/
6418
				/* out: error code */
6419
	THD*	thd,		/* in: handle to the user thread */
6420
	int	lock_type)	/* in: lock type */
6421 6422 6423 6424
{
	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
	trx_t*		trx;

6425
	DBUG_ENTER("ha_innobase::transactional_table_lock");
6426 6427 6428 6429 6430 6431 6432 6433
	DBUG_PRINT("enter",("lock_type: %d", lock_type));

	/* We do not know if MySQL can call this function before calling
	external_lock(). To be safe, update the thd of the current table
	handle. */

	update_thd(thd);

6434 6435 6436
	if (prebuilt->table->ibd_file_missing && !current_thd->tablespace_op) {
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB error:\n"
6437 6438 6439
"MySQL is trying to use a table handle but the .ibd file for\n"
"table %s does not exist.\n"
"Have you deleted the .ibd file from the database directory under\n"
jan@hundin.mysql.fi's avatar
jan@hundin.mysql.fi committed
6440
"the MySQL datadir?"
6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458
"Look from section 15.1 of http://www.innodb.com/ibman.html\n"
"how you can resolve the problem.\n",
				prebuilt->table->name);
		DBUG_RETURN(HA_ERR_CRASHED);
	}

	trx = prebuilt->trx;

	prebuilt->sql_stat_start = TRUE;
	prebuilt->hint_need_to_fetch_extra_cols = 0;

	prebuilt->read_just_key = 0;
	prebuilt->keep_other_fields_on_keyread = FALSE;

	if (lock_type == F_WRLCK) {
		prebuilt->select_lock_type = LOCK_X;
		prebuilt->stored_select_lock_type = LOCK_X;
	} else if (lock_type == F_RDLCK) {
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6459 6460
		prebuilt->select_lock_type = LOCK_S;
		prebuilt->stored_select_lock_type = LOCK_S;
6461
	} else {
6462 6463
		ut_print_timestamp(stderr);
		fprintf(stderr, "  InnoDB error:\n"
6464 6465 6466 6467 6468 6469 6470 6471 6472
"MySQL is trying to set transactional table lock with corrupted lock type\n"
"to table %s, lock type %d does not exist.\n",
				prebuilt->table->name, lock_type);
		DBUG_RETURN(HA_ERR_CRASHED);
	}

	/* MySQL is setting a new transactional table lock */

	/* Set the MySQL flag to mark that there is an active transaction */
6473
	if (trx->active_trans == 0) {
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6474

6475 6476 6477
		innobase_register_trx_and_stmt(thd);
		trx->active_trans = 1;
	}
6478 6479 6480 6481

	if (thd->in_lock_tables && thd->variables.innodb_table_locks) {
		ulint	error = DB_SUCCESS;

6482
		error = row_lock_table_for_mysql(prebuilt, NULL, 0);
6483 6484

		if (error != DB_SUCCESS) {
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6485 6486
			error = convert_error_code_to_mysql((int) error, user_thd);
			DBUG_RETURN((int) error);
6487 6488 6489 6490
		}

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

6491 6492
			/* Store the current undo_no of the transaction
			so that we know where to roll back if we have
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			to roll back the next SQL statement */

			trx_mark_sql_stat_end(trx);
		}
	}

	DBUG_RETURN(0);
}

6502 6503 6504
/****************************************************************************
Here we export InnoDB status variables to MySQL.  */

6505
int
6506
innodb_export_status()
6507
/*==================*/
6508
{
6509 6510 6511 6512 6513
	if (innodb_inited) {
		srv_export_innodb_status();
	}

	return 0;
6514 6515
}

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6516
/****************************************************************************
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6517
Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB
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heikki@hundin.mysql.fi committed
6518 6519
Monitor to the client. */

6520
bool
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6521 6522
innodb_show_status(
/*===============*/
6523 6524
	THD*	thd,	/* in: the MySQL query thread of the caller */
	stat_print_fn *stat_print)
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6525
{
6526 6527 6528 6529 6530
	trx_t*			trx;
	static const char	truncated_msg[] = "... truncated...\n";
	const long		MAX_STATUS_SIZE = 64000;
	ulint			trx_list_start = ULINT_UNDEFINED;
	ulint			trx_list_end = ULINT_UNDEFINED;
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6531

6532
	DBUG_ENTER("innodb_show_status");
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6533

6534 6535 6536
	if (have_innodb != SHOW_OPTION_YES) {
		DBUG_RETURN(FALSE);
	}
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6537

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6538 6539 6540 6541
	trx = check_trx_exists(thd);

	innobase_release_stat_resources(trx);

6542 6543
	/* We let the InnoDB Monitor to output at most MAX_STATUS_SIZE
	bytes of text. */
6544

6545
	long	flen, usable_len;
6546
	char*	str;
6547

6548
	mutex_enter_noninline(&srv_monitor_file_mutex);
6549
	rewind(srv_monitor_file);
6550 6551
	srv_printf_innodb_monitor(srv_monitor_file,
				&trx_list_start, &trx_list_end);
6552
	flen = ftell(srv_monitor_file);
6553
	os_file_set_eof(srv_monitor_file);
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6554

6555 6556
	if (flen < 0) {
		flen = 0;
6557 6558 6559 6560 6561 6562
	}

	if (flen > MAX_STATUS_SIZE) {
		usable_len = MAX_STATUS_SIZE;
	} else {
		usable_len = flen;
6563
	}
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6564

6565 6566
	/* allocate buffer for the string, and
	read the contents of the temporary file */
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6567

6568 6569 6570 6571
	if (!(str = my_malloc(usable_len + 1, MYF(0)))) {
	  mutex_exit_noninline(&srv_monitor_file_mutex);
	  DBUG_RETURN(TRUE);
	}
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6572

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monty@mishka.local committed
6573
	rewind(srv_monitor_file);
6574 6575
	if (flen < MAX_STATUS_SIZE) {
		/* Display the entire output. */
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6576
		flen = (long) fread(str, 1, flen, srv_monitor_file);
6577 6578 6579 6580 6581
	} else if (trx_list_end < (ulint) flen
			&& trx_list_start < trx_list_end
			&& trx_list_start + (flen - trx_list_end)
			< MAX_STATUS_SIZE - sizeof truncated_msg - 1) {
		/* Omit the beginning of the list of active transactions. */
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6582
		long len = (long) fread(str, 1, trx_list_start, srv_monitor_file);
6583 6584 6585 6586
		memcpy(str + len, truncated_msg, sizeof truncated_msg - 1);
		len += sizeof truncated_msg - 1;
		usable_len = (MAX_STATUS_SIZE - 1) - len;
		fseek(srv_monitor_file, flen - usable_len, SEEK_SET);
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6587
		len += (long) fread(str + len, 1, usable_len, srv_monitor_file);
6588 6589 6590
		flen = len;
	} else {
		/* Omit the end of the output. */
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heikki@hundin.mysql.fi committed
6591
		flen = (long) fread(str, 1, MAX_STATUS_SIZE - 1, srv_monitor_file);
6592
	}
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6593

6594
	mutex_exit_noninline(&srv_monitor_file_mutex);
6595

6596
	bool result = FALSE;
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6597

6598
	if (stat_print(thd, innobase_hton_name, strlen(innobase_hton_name),
6599
			STRING_WITH_LEN(""), str, flen)) {
6600
		result= TRUE;
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6601
	}
6602
	my_free(str, MYF(0));
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6603

6604
	DBUG_RETURN(FALSE);
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6605 6606
}

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6607 6608 6609 6610 6611
/****************************************************************************
Implements the SHOW MUTEX STATUS command. . */

bool
innodb_mutex_show_status(
6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624
/*=====================*/
	THD*		thd,		/* in: the MySQL query thread of the
					caller */
	stat_print_fn*	stat_print)
{
	char buf1[IO_SIZE], buf2[IO_SIZE];
	mutex_t*  mutex;
	ulint	  rw_lock_count= 0;
	ulint	  rw_lock_count_spin_loop= 0;
	ulint	  rw_lock_count_spin_rounds= 0;
	ulint	  rw_lock_count_os_wait= 0;
	ulint	  rw_lock_count_os_yield= 0;
	ulonglong rw_lock_wait_time= 0;
6625
	uint	  hton_name_len= strlen(innobase_hton_name), buf1len, buf2len;
6626
	DBUG_ENTER("innodb_mutex_show_status");
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6627

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vtkachenko@intelp4d.mysql.com committed
6628
#ifdef MUTEX_PROTECT_TO_BE_ADDED_LATER
6629
	mutex_enter(&mutex_list_mutex);
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6630
#endif
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6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651
	mutex = UT_LIST_GET_FIRST(mutex_list);

	while (mutex != NULL) {
		if (mutex->mutex_type != 1) {
			if (mutex->count_using > 0) {
				buf1len= my_snprintf(buf1, sizeof(buf1),
					"%s:%s",
					mutex->cmutex_name, mutex->cfile_name);
				buf2len= my_snprintf(buf2, sizeof(buf2),
					"count=%lu, spin_waits=%lu,"
					" spin_rounds=%lu, "
					"os_waits=%lu, os_yields=%lu,"
					" os_wait_times=%lu",
					mutex->count_using,
					mutex->count_spin_loop,
					mutex->count_spin_rounds,
					mutex->count_os_wait,
					mutex->count_os_yield,
					mutex->lspent_time/1000);

6652
				if (stat_print(thd, innobase_hton_name,
6653 6654
						hton_name_len, buf1, buf1len,
						buf2, buf2len)) {
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vtkachenko@intelp4d.mysql.com committed
6655
#ifdef MUTEX_PROTECT_TO_BE_ADDED_LATER
6656
					mutex_exit(&mutex_list_mutex);
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vtkachenko@intelp4d.mysql.com committed
6657
#endif
6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669
					DBUG_RETURN(1);
				}
			}
		}
		else {
			rw_lock_count += mutex->count_using;
			rw_lock_count_spin_loop += mutex->count_spin_loop;
			rw_lock_count_spin_rounds += mutex->count_spin_rounds;
			rw_lock_count_os_wait += mutex->count_os_wait;
			rw_lock_count_os_yield += mutex->count_os_yield;
			rw_lock_wait_time += mutex->lspent_time;
		}
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6670

6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681
		mutex = UT_LIST_GET_NEXT(list, mutex);
	}

	buf2len= my_snprintf(buf2, sizeof(buf2),
		"count=%lu, spin_waits=%lu, spin_rounds=%lu, "
		"os_waits=%lu, os_yields=%lu, os_wait_times=%lu",
		rw_lock_count, rw_lock_count_spin_loop,
		rw_lock_count_spin_rounds,
		rw_lock_count_os_wait, rw_lock_count_os_yield,
		rw_lock_wait_time/1000);

6682
	if (stat_print(thd, innobase_hton_name, hton_name_len,
6683 6684 6685
			STRING_WITH_LEN("rw_lock_mutexes"), buf2, buf2len)) {
		DBUG_RETURN(1);
	}
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vtkachenko@intelp4d.mysql.com committed
6686

vtkachenko@intelp4d.mysql.com's avatar
vtkachenko@intelp4d.mysql.com committed
6687
#ifdef MUTEX_PROTECT_TO_BE_ADDED_LATER
6688
	mutex_exit(&mutex_list_mutex);
vtkachenko@intelp4d.mysql.com's avatar
vtkachenko@intelp4d.mysql.com committed
6689
#endif
6690 6691

	DBUG_RETURN(FALSE);
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6692 6693
}

6694
bool innobase_show_status(THD* thd, stat_print_fn* stat_print,
6695 6696 6697 6698 6699 6700 6701 6702 6703 6704
	enum ha_stat_type stat_type)
{
	switch (stat_type) {
	case HA_ENGINE_STATUS:
		return innodb_show_status(thd, stat_print);
	case HA_ENGINE_MUTEX:
		return innodb_mutex_show_status(thd, stat_print);
	default:
		return FALSE;
	}
6705 6706 6707
}


6708 6709 6710 6711 6712
/****************************************************************************
 Handling the shared INNOBASE_SHARE structure that is needed to provide table
 locking.
****************************************************************************/

6713 6714 6715 6716 6717 6718
static mysql_byte* innobase_get_key(INNOBASE_SHARE* share, uint* length,
	my_bool not_used __attribute__((unused)))
{
	*length=share->table_name_length;

	return (mysql_byte*) share->table_name;
6719 6720
}

6721
static INNOBASE_SHARE* get_share(const char* table_name)
6722
{
6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767
	INNOBASE_SHARE *share;
	pthread_mutex_lock(&innobase_share_mutex);
	uint length=(uint) strlen(table_name);

	if (!(share=(INNOBASE_SHARE*) hash_search(&innobase_open_tables,
				(mysql_byte*) table_name,
				length))) {

		share = (INNOBASE_SHARE *) my_malloc(sizeof(*share)+length+1,
			MYF(MY_FAE | MY_ZEROFILL));

		share->table_name_length=length;
		share->table_name=(char*) (share+1);
		strmov(share->table_name,table_name);

		if (my_hash_insert(&innobase_open_tables,
				(mysql_byte*) share)) {
			pthread_mutex_unlock(&innobase_share_mutex);
			my_free((gptr) share,0);

			return 0;
		}

		thr_lock_init(&share->lock);
		pthread_mutex_init(&share->mutex,MY_MUTEX_INIT_FAST);
	}

	share->use_count++;
	pthread_mutex_unlock(&innobase_share_mutex);

	return share;
}

static void free_share(INNOBASE_SHARE* share)
{
	pthread_mutex_lock(&innobase_share_mutex);

	if (!--share->use_count) {
		hash_delete(&innobase_open_tables, (mysql_byte*) share);
		thr_lock_delete(&share->lock);
		pthread_mutex_destroy(&share->mutex);
		my_free((gptr) share, MYF(0));
	}

	pthread_mutex_unlock(&innobase_share_mutex);
6768
}
6769 6770

/*********************************************************************
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6771
Converts a MySQL table lock stored in the 'lock' field of the handle to
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6772 6773 6774 6775 6776 6777
a proper type before storing pointer to the lock into an array of pointers.
MySQL also calls this if it wants to reset some table locks to a not-locked
state during the processing of an SQL query. An example is that during a
SELECT the read lock is released early on the 'const' tables where we only
fetch one row. MySQL does not call this when it releases all locks at the
end of an SQL statement. */
6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789

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 */
6790
	enum thr_lock_type	lock_type)	/* in: lock type to store in
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6791 6792
						'lock'; this may also be
						TL_IGNORE */
6793 6794
{
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
6795
	trx_t*		trx		= prebuilt->trx;
6796

6797
	/* NOTE: MySQL	can call this function with lock 'type' TL_IGNORE!
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6798 6799 6800
	Be careful to ignore TL_IGNORE if we are going to do something with
	only 'real' locks! */

6801 6802 6803 6804 6805 6806 6807 6808 6809 6810
	/* If no MySQL tables is use we need to set isolation level
	of the transaction. */

	if (lock_type != TL_IGNORE
	&& trx->n_mysql_tables_in_use == 0) {
		trx->isolation_level = innobase_map_isolation_level(
						(enum_tx_isolation)
						thd->variables.tx_isolation);
	}

6811 6812 6813 6814 6815 6816
	if ((lock_type == TL_READ && thd->in_lock_tables) ||
		(lock_type == TL_READ_HIGH_PRIORITY && thd->in_lock_tables) ||
		lock_type == TL_READ_WITH_SHARED_LOCKS ||
		lock_type == TL_READ_NO_INSERT ||
		(thd->lex->sql_command != SQLCOM_SELECT
			&& lock_type != TL_IGNORE)) {
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heikki@hundin.mysql.fi committed
6817

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heikki@hundin.mysql.fi committed
6818 6819 6820 6821 6822
		/* The OR cases above are in this order:
		1) MySQL is doing LOCK TABLES ... READ LOCAL, or
		2) (we do not know when TL_READ_HIGH_PRIORITY is used), or
		3) this is a SELECT ... IN SHARE MODE, or
		4) we are doing a complex SQL statement like
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heikki@hundin.mysql.fi committed
6823
		INSERT INTO ... SELECT ... and the logical logging (MySQL
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heikki@hundin.mysql.fi committed
6824
		binlog) requires the use of a locking read, or
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heikki@hundin.mysql.fi committed
6825 6826 6827
		MySQL is doing LOCK TABLES ... READ.
		5) we let InnoDB do locking reads for all SQL statements that
		are not simple SELECTs; note that select_lock_type in this
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heikki@hundin.mysql.fi committed
6828 6829 6830 6831 6832 6833
		case may get strengthened in ::external_lock() to LOCK_X.
		Note that we MUST use a locking read in all data modifying
		SQL statements, because otherwise the execution would not be
		serializable, and also the results from the update could be
		unexpected if an obsolete consistent read view would be
		used. */
6834

6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845
		ulint	isolation_level;

		isolation_level = trx->isolation_level;

		if ((srv_locks_unsafe_for_binlog
			|| isolation_level == TRX_ISO_READ_COMMITTED)
		&& isolation_level != TRX_ISO_SERIALIZABLE
		&& (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT)
		&& (thd->lex->sql_command == SQLCOM_INSERT_SELECT
			|| thd->lex->sql_command == SQLCOM_UPDATE
			|| thd->lex->sql_command == SQLCOM_CREATE_TABLE)) {
6846

6847 6848 6849
			/* If we either have innobase_locks_unsafe_for_binlog
			option set or this session is using READ COMMITTED
			isolation level and isolation level of the transaction
6850
			is not set to serializable and MySQL is doing
6851 6852 6853 6854
			INSERT INTO...SELECT or UPDATE ... = (SELECT ...) or
			CREATE  ... SELECT... without FOR UPDATE or
			IN SHARE MODE in select, then we use consistent
			read for select. */
6855 6856 6857

			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
6858
		} else if (thd->lex->sql_command == SQLCOM_CHECKSUM) {
6859
			/* Use consistent read for checksum table */
6860

6861 6862 6863 6864 6865 6866
			prebuilt->select_lock_type = LOCK_NONE;
			prebuilt->stored_select_lock_type = LOCK_NONE;
		} else {
			prebuilt->select_lock_type = LOCK_S;
			prebuilt->stored_select_lock_type = LOCK_S;
		}
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heikki@hundin.mysql.fi committed
6867

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heikki@hundin.mysql.fi committed
6868 6869
	} else if (lock_type != TL_IGNORE) {

6870
		/* We set possible LOCK_X value in external_lock, not yet
6871
		here even if this would be SELECT ... FOR UPDATE */
6872

6873
		prebuilt->select_lock_type = LOCK_NONE;
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6874
		prebuilt->stored_select_lock_type = LOCK_NONE;
6875 6876 6877 6878
	}

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

6879
		/* Starting from 5.0.7, we weaken also the table locks
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6880 6881 6882 6883 6884 6885 6886
		set at the start of a MySQL stored procedure call, just like
		we weaken the locks set at the start of an SQL statement.
		MySQL does set thd->in_lock_tables TRUE there, but in reality
		we do not need table locks to make the execution of a
		single transaction stored procedure call deterministic
		(if it does not use a consistent read). */

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6887 6888 6889 6890 6891 6892 6893 6894
		if (lock_type == TL_READ && thd->in_lock_tables) {
			/* We come here if MySQL is processing LOCK TABLES
			... READ LOCAL. MyISAM under that table lock type
			reads the table as it was at the time the lock was
			granted (new inserts are allowed, but not seen by the
			reader). To get a similar effect on an InnoDB table,
			we must use LOCK TABLES ... READ. We convert the lock
			type here, so that for InnoDB, READ LOCAL is
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6895 6896 6897
			equivalent to READ. This will change the InnoDB
			behavior in mysqldump, so that dumps of InnoDB tables
			are consistent with dumps of MyISAM tables. */
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6898 6899 6900 6901

			lock_type = TL_READ_NO_INSERT;
		}

6902
		/* If we are not doing a LOCK TABLE, DISCARD/IMPORT
6903
		TABLESPACE or TRUNCATE TABLE then allow multiple
6904 6905
		writers. Note that ALTER TABLE uses a TL_WRITE_ALLOW_READ
		< TL_WRITE_CONCURRENT_INSERT.
6906

6907 6908 6909 6910
		We especially allow multiple writers if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL) or a
		stored function call (MySQL does have thd->in_lock_tables
		TRUE there). */
6911

grog@mysql.com[grog]'s avatar
foo1  
grog@mysql.com[grog] committed
6912
    		if ((lock_type >= TL_WRITE_CONCURRENT_INSERT
6913
		    && lock_type <= TL_WRITE)
kent@mysql.com's avatar
kent@mysql.com committed
6914
		    && !(thd->in_lock_tables
6915
			    && thd->lex->sql_command == SQLCOM_LOCK_TABLES)
6916
		    && !thd->tablespace_op
serg@serg.mylan's avatar
serg@serg.mylan committed
6917
		    && thd->lex->sql_command != SQLCOM_TRUNCATE
6918
		    && thd->lex->sql_command != SQLCOM_OPTIMIZE
6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929
#ifdef __WIN__
                /* 
                   for alter table on win32 for succesfull operation 
                   completion it is used TL_WRITE(=10) lock instead of
                   TL_WRITE_ALLOW_READ(=6), however here in innodb handler
                   TL_WRITE is lifted to TL_WRITE_ALLOW_WRITE, which causes
                   race condition when several clients do alter table 
                   simultaneously (bug #17264). This fix avoids the problem.
                */
                    && thd->lex->sql_command != SQLCOM_ALTER_TABLE
#endif
6930
		    && thd->lex->sql_command != SQLCOM_CREATE_TABLE) {
6931 6932

			lock_type = TL_WRITE_ALLOW_WRITE;
6933 6934
      		}

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6935 6936 6937 6938
		/* In queries of type INSERT INTO t1 SELECT ... FROM t2 ...
		MySQL would use the lock TL_READ_NO_INSERT on t2, and that
		would conflict with TL_WRITE_ALLOW_WRITE, blocking all inserts
		to t2. Convert the lock to a normal read lock to allow
6939 6940 6941 6942 6943 6944
		concurrent inserts to t2.

		We especially allow concurrent inserts if MySQL is at the
		start of a stored procedure call (SQLCOM_CALL)
		(MySQL does have thd->in_lock_tables TRUE there). */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6945
		if (lock_type == TL_READ_NO_INSERT
6946 6947
			&& (!thd->in_lock_tables
				|| thd->lex->sql_command == SQLCOM_CALL)) {
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heikki@hundin.mysql.fi committed
6948

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6949 6950
			lock_type = TL_READ;
		}
6951

6952 6953 6954 6955
		lock.type = lock_type;
	}

	*to++= &lock;
6956

6957 6958 6959
	return(to);
}

6960
/***********************************************************************
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6961 6962
This function initializes the auto-inc counter if it has not been
initialized yet. This function does not change the value of the auto-inc
6963
counter if it already has been initialized. In parameter ret returns
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heikki@hundin.mysql.fi committed
6964
the value of the auto-inc counter. */
6965

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6966 6967 6968
int
ha_innobase::innobase_read_and_init_auto_inc(
/*=========================================*/
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6969 6970
				/* out: 0 or error code: deadlock or lock wait
				timeout */
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heikki@hundin.mysql.fi committed
6971
	longlong*	ret)	/* out: auto-inc value */
6972
{
6973 6974
	row_prebuilt_t* prebuilt	= (row_prebuilt_t*) innobase_prebuilt;
	longlong	auto_inc;
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6975 6976
	ulint		old_select_lock_type;
	ibool		trx_was_not_started	= FALSE;
6977
	int		error;
6978

6979
	ut_a(prebuilt);
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heikki@hundin.mysql.fi committed
6980
	ut_a(prebuilt->trx ==
6981
		(trx_t*) current_thd->ha_data[innobase_hton.slot]);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6982
	ut_a(prebuilt->table);
6983

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6984 6985 6986 6987
	if (prebuilt->trx->conc_state == TRX_NOT_STARTED) {
		trx_was_not_started = TRUE;
	}

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heikki@hundin.mysql.fi committed
6988 6989 6990 6991 6992
	/* In case MySQL calls this in the middle of a SELECT query, release
	possible adaptive hash latch to avoid deadlocks of threads */

	trx_search_latch_release_if_reserved(prebuilt->trx);

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heikki@hundin.mysql.fi committed
6993
	auto_inc = dict_table_autoinc_read(prebuilt->table);
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heikki@hundin.mysql.fi committed
6994

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6995 6996 6997
	if (auto_inc != 0) {
		/* Already initialized */
		*ret = auto_inc;
6998

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
6999 7000 7001
		error = 0;

		goto func_exit_early;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7002
	}
7003

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7004
	error = row_lock_table_autoinc_for_mysql(prebuilt);
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heikki@hundin.mysql.fi committed
7005

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7006 7007
	if (error != DB_SUCCESS) {
		error = convert_error_code_to_mysql(error, user_thd);
7008

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7009
		goto func_exit_early;
7010
	}
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
7011

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7012 7013
	/* Check again if someone has initialized the counter meanwhile */
	auto_inc = dict_table_autoinc_read(prebuilt->table);
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heikki@hundin.mysql.fi committed
7014

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7015 7016
	if (auto_inc != 0) {
		*ret = auto_inc;
7017

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7018 7019 7020
		error = 0;

		goto func_exit_early;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7021
	}
7022

7023 7024
	(void) extra(HA_EXTRA_KEYREAD);
	index_init(table->s->next_number_index, 1);
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heikki@hundin.mysql.fi committed
7025

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7026 7027 7028 7029 7030 7031
	/* Starting from 5.0.9, we use a consistent read to read the auto-inc
	column maximum value. This eliminates the spurious deadlocks caused
	by the row X-lock that we previously used. Note the following flaw
	in our algorithm: if some other user meanwhile UPDATEs the auto-inc
	column, our consistent read will not return the largest value. We
	accept this flaw, since the deadlocks were a bigger trouble. */
7032

7033 7034
	/* Fetch all the columns in the key */

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7035
	prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS;
7036

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7037
	old_select_lock_type = prebuilt->select_lock_type;
7038
	prebuilt->select_lock_type = LOCK_NONE;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7039 7040 7041 7042 7043

	/* Eliminate an InnoDB error print that happens when we try to SELECT
	from a table when no table has been locked in ::external_lock(). */
	prebuilt->trx->n_mysql_tables_in_use++;

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7044
	error = index_last(table->record[1]);
7045

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7046
	prebuilt->trx->n_mysql_tables_in_use--;
7047
	prebuilt->select_lock_type = old_select_lock_type;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7048

7049
	if (error) {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7050 7051 7052 7053 7054 7055
		if (error == HA_ERR_END_OF_FILE) {
			/* The table was empty, initialize to 1 */
			auto_inc = 1;

			error = 0;
		} else {
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heikki@hundin.mysql.fi committed
7056
			/* This should not happen in a consistent read */
7057 7058
		  sql_print_error("Consistent read of auto-inc column "
				  "returned %lu", (ulong) error);
7059
			auto_inc = -1;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7060

7061 7062 7063
			goto func_exit;
		}
	} else {
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7064 7065 7066 7067 7068 7069
		/* Initialize to max(col) + 1; we use
		'found_next_number_field' below because MySQL in SHOW TABLE
		STATUS does not seem to set 'next_number_field'. The comment
		in table.h says that 'next_number_field' is set when it is
		'active'. */

7070 7071 7072
		auto_inc = (longlong) table->found_next_number_field->
				val_int_offset(table->s->rec_buff_length) + 1;
	}
7073

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heikki@hundin.mysql.fi committed
7074 7075 7076
	dict_table_autoinc_initialize(prebuilt->table, auto_inc);

func_exit:
7077
	(void) extra(HA_EXTRA_NO_KEYREAD);
7078

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7079 7080 7081 7082
	index_end();

	*ret = auto_inc;

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7083 7084
func_exit_early:
	/* Since MySQL does not seem to call autocommit after SHOW TABLE
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heikki@hundin.mysql.fi committed
7085
	STATUS (even if we would register the trx here), we commit our
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7086
	transaction here if it was started here. This is to eliminate a
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7087 7088 7089
	dangling transaction. If the user had AUTOCOMMIT=0, then SHOW
	TABLE STATUS does leave a dangling transaction if the user does not
	himself call COMMIT. */
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heikki@hundin.mysql.fi committed
7090 7091 7092 7093 7094 7095

	if (trx_was_not_started) {

		innobase_commit_low(prebuilt->trx);
	}

7096
	return(error);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7097 7098
}

7099
/*******************************************************************************
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heikki@hundin.mysql.fi committed
7100 7101 7102
This function initializes the auto-inc counter if it has not been
initialized yet. This function does not change the value of the auto-inc
counter if it already has been initialized. Returns the value of the
7103 7104 7105
auto-inc counter in *first_value, and ULONGLONG_MAX in *nb_reserved_values (as
we have a table-level lock). offset, increment, nb_desired_values are ignored.
*first_value is set to -1 if error (deadlock or lock wait timeout)            */
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heikki@hundin.mysql.fi committed
7106

7107 7108 7109 7110 7111 7112 7113
void ha_innobase::get_auto_increment(
/*=================================*/
        ulonglong offset,              /* in */
        ulonglong increment,           /* in */
        ulonglong nb_desired_values,   /* in */
        ulonglong *first_value,        /* out */
        ulonglong *nb_reserved_values) /* out */
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
7114
{
7115 7116 7117
	longlong	nr;
	int		error;

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heikki@hundin.mysql.fi committed
7118 7119 7120
	error = innobase_read_and_init_auto_inc(&nr);

	if (error) {
7121 7122 7123
		/* This should never happen in the current (5.0.6) code, since
		we call this function only after the counter has been
		initialized. */
7124

7125
		ut_print_timestamp(stderr);
7126 7127
		sql_print_error("Error %lu in ::get_auto_increment()",
				(ulong) error);
7128 7129
                *first_value= (~(ulonglong) 0);
		return;
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heikki@hundin.mysql.fi committed
7130
	}
7131

7132 7133 7134
        *first_value= (ulonglong) nr;
        /* table-level autoinc lock reserves up to +inf */
        *nb_reserved_values= ULONGLONG_MAX;
7135 7136
}

7137 7138
/* See comment in handler.h */
int
osku@127.(none)'s avatar
osku@127.(none) committed
7139
ha_innobase::reset_auto_increment(ulonglong value)
7140 7141 7142 7143
{
	DBUG_ENTER("ha_innobase::reset_auto_increment");

	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
7144
	int		error;
7145 7146 7147 7148 7149 7150 7151

	error = row_lock_table_autoinc_for_mysql(prebuilt);

	if (error != DB_SUCCESS) {
		error = convert_error_code_to_mysql(error, user_thd);

		DBUG_RETURN(error);
7152
	}
7153

osku@127.(none)'s avatar
osku@127.(none) committed
7154
	dict_table_autoinc_initialize(prebuilt->table, value);
7155 7156 7157 7158

	DBUG_RETURN(0);
}

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/* See comment in handler.cc */
bool
ha_innobase::get_error_message(int error, String *buf)
{
7163
	trx_t*	trx = check_trx_exists(current_thd);
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	buf->copy(trx->detailed_error, strlen(trx->detailed_error),
		system_charset_info);

	return FALSE;
}

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/***********************************************************************
Compares two 'refs'. A 'ref' is the (internal) primary key value of the row.
If there is no explicitly declared non-null unique key or a primary key, then
InnoDB internally uses the row id as the primary key. */
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int
ha_innobase::cmp_ref(
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/*=================*/
				/* out: < 0 if ref1 < ref2, 0 if equal, else
				> 0 */
	const mysql_byte* ref1,	/* in: an (internal) primary key value in the
				MySQL key value format */
	const mysql_byte* ref2)	/* in: an (internal) primary key value in the
				MySQL key value format */
7185
{
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	row_prebuilt_t*	prebuilt = (row_prebuilt_t*) innobase_prebuilt;
7187
	enum_field_types mysql_type;
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	Field*		field;
	KEY_PART_INFO*	key_part;
	KEY_PART_INFO*	key_part_end;
	uint		len1;
	uint		len2;
7193
	int		result;
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	if (prebuilt->clust_index_was_generated) {
		/* The 'ref' is an InnoDB row id */

		return(memcmp(ref1, ref2, DATA_ROW_ID_LEN));
	}

	/* Do a type-aware comparison of primary key fields. PK fields
	are always NOT NULL, so no checks for NULL are performed. */

	key_part = table->key_info[table->s->primary_key].key_part;

	key_part_end = key_part
			+ table->key_info[table->s->primary_key].key_parts;

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	for (; key_part != key_part_end; ++key_part) {
		field = key_part->field;
		mysql_type = field->type();
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		if (mysql_type == FIELD_TYPE_TINY_BLOB
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			|| mysql_type == FIELD_TYPE_MEDIUM_BLOB
			|| mysql_type == FIELD_TYPE_BLOB
			|| mysql_type == FIELD_TYPE_LONG_BLOB) {

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			/* In the MySQL key value format, a column prefix of
			a BLOB is preceded by a 2-byte length field */

			len1 = innobase_read_from_2_little_endian(ref1);
			len2 = innobase_read_from_2_little_endian(ref2);

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			ref1 += 2;
			ref2 += 2;
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			result = ((Field_blob*)field)->cmp(
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				(const char*)ref1, len1,
				(const char*)ref2, len2);
7229
		} else {
7230
			result = field->key_cmp(ref1, ref2);
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		}

		if (result) {

			return(result);
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		}

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		ref1 += key_part->store_length;
		ref2 += key_part->store_length;
7240
	}
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	return(0);
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}

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char*
ha_innobase::get_mysql_bin_log_name()
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{
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	return(trx_sys_mysql_bin_log_name);
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}

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ulonglong
ha_innobase::get_mysql_bin_log_pos()
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{
7254
	/* trx... is ib_longlong, which is a typedef for a 64-bit integer
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	(__int64 or longlong) so it's ok to cast it to ulonglong. */

7257
	return(trx_sys_mysql_bin_log_pos);
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}

7260
extern "C" {
7261
/**********************************************************************
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This function is used to find the storage length in bytes of the first n
characters for prefix indexes using a multibyte character set. The function
finds charset information and returns length of prefix_len characters in the
index field in bytes.

NOTE: the prototype of this function is copied to data0type.c! If you change
this function, you MUST change also data0type.c! */
7269

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ulint
innobase_get_at_most_n_mbchars(
/*===========================*/
				/* out: number of bytes occupied by the first
				n characters */
7275
	ulint charset_id,	/* in: character set id */
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	ulint prefix_len,	/* in: prefix length in bytes of the index
				(this has to be divided by mbmaxlen to get the
				number of CHARACTERS n in the prefix) */
7279
	ulint data_len,		/* in: length of the string in bytes */
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	const char* str)	/* in: character string */
7281
{
7282
	ulint char_length;	/* character length in bytes */
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	ulint n_chars;		/* number of characters in prefix */
7284
	CHARSET_INFO* charset;	/* charset used in the field */
7285

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	charset = get_charset((uint) charset_id, MYF(MY_WME));
7287

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	ut_ad(charset);
	ut_ad(charset->mbmaxlen);
7290

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	/* Calculate how many characters at most the prefix index contains */
7292

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	n_chars = prefix_len / charset->mbmaxlen;
7294

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	/* If the charset is multi-byte, then we must find the length of the
	first at most n chars in the string. If the string contains less
	characters than n, then we return the length to the end of the last
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	character. */
7299

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	if (charset->mbmaxlen > 1) {
		/* my_charpos() returns the byte length of the first n_chars
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		characters, or a value bigger than the length of str, if
		there were not enough full characters in str.

		Why does the code below work:
		Suppose that we are looking for n UTF-8 characters.

		1) If the string is long enough, then the prefix contains at
		least n complete UTF-8 characters + maybe some extra
		characters + an incomplete UTF-8 character. No problem in
		this case. The function returns the pointer to the
		end of the nth character.

		2) If the string is not long enough, then the string contains
		the complete value of a column, that is, only complete UTF-8
		characters, and we can store in the column prefix index the
		whole string. */
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		char_length = my_charpos(charset, str,
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						str + data_len, (int) n_chars);
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		if (char_length > data_len) {
			char_length = data_len;
7323
		}
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	} else {
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		if (data_len < prefix_len) {
			char_length = data_len;
		} else {
			char_length = prefix_len;
		}
7330
	}
7331

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	return(char_length);
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}
}

7336 7337
extern "C" {
/**********************************************************************
7338
This function returns true if
7339 7340

1) SQL-query in the current thread
7341
is either REPLACE or LOAD DATA INFILE REPLACE.
7342 7343 7344 7345

2) SQL-query in the current thread
is INSERT ON DUPLICATE KEY UPDATE.

7346
NOTE that /mysql/innobase/row/row0ins.c must contain the
7347 7348 7349
prototype for this function ! */

ibool
7350
innobase_query_is_update(void)
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/*==========================*/
7352 7353
{
	THD*	thd;
7354

7355
	thd = (THD *)innobase_current_thd();
7356

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	if (thd->lex->sql_command == SQLCOM_REPLACE ||
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		thd->lex->sql_command == SQLCOM_REPLACE_SELECT ||
		(thd->lex->sql_command == SQLCOM_LOAD &&
			thd->lex->duplicates == DUP_REPLACE)) {
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		return(1);
7363
	}
7364

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	if (thd->lex->sql_command == SQLCOM_INSERT &&
7366
		thd->lex->duplicates  == DUP_UPDATE) {
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		return(1);
7369 7370
	}

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	return(0);
7372
}
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}

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/***********************************************************************
This function is used to prepare X/Open XA distributed transaction   */

7378
int
7379 7380
innobase_xa_prepare(
/*================*/
7381 7382 7383 7384 7385 7386 7387
			/* out: 0 or error number */
	THD*	thd,	/* in: handle to the MySQL thread of the user
			whose XA transaction should be prepared */
	bool	all)	/* in: TRUE - commit transaction
			FALSE - the current SQL statement ended */
{
	int error = 0;
7388
	trx_t* trx = check_trx_exists(thd);
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7390 7391 7392
	if (thd->lex->sql_command != SQLCOM_XA_PREPARE &&
	    (all || !(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))))
	{
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7394 7395
		/* For ibbackup to work the order of transactions in binlog
		and InnoDB must be the same. Consider the situation
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		  thread1> prepare; write to binlog; ...
			  <context switch>
		  thread2> prepare; write to binlog; commit
		  thread1>			     ... commit
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		To ensure this will not happen we're taking the mutex on
		prepare, and releasing it on commit.
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		Note: only do it for normal commits, done via ha_commit_trans.
		If 2pc protocol is executed by external transaction
		coordinator, it will be just a regular MySQL client
		executing XA PREPARE and XA COMMIT commands.
		In this case we cannot know how many minutes or hours
		will be between XA PREPARE and XA COMMIT, and we don't want
		to block for undefined period of time.
		*/
		pthread_mutex_lock(&prepare_commit_mutex);
		trx->active_trans = 2;
	}
7416

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	if (!thd->variables.innodb_support_xa) {

		return(0);
	}

7422
	trx->xid=thd->transaction.xid_state.xid;
7423 7424 7425 7426 7427 7428 7429 7430 7431

	/* Release a possible FIFO ticket and search latch. Since we will
	reserve the kernel mutex, we have to release the search system latch
	first to obey the latching order. */

	innobase_release_stat_resources(trx);

	if (trx->active_trans == 0 && trx->conc_state != TRX_NOT_STARTED) {

7432 7433
	  sql_print_error("trx->active_trans == 0, but trx->conc_state != "
			  "TRX_NOT_STARTED");
7434 7435
	}

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7436
	if (all
7437
		|| (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {
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7438

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		/* We were instructed to prepare the whole transaction, or
		this is an SQL statement end and autocommit is on */
7441

7442
		ut_ad(trx->active_trans);
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		error = (int) trx_prepare_for_mysql(trx);
7445
	} else {
7446
		/* We just mark the SQL statement ended and do not do a
7447 7448 7449 7450 7451
		transaction prepare */

		if (trx->auto_inc_lock) {
			/* If we had reserved the auto-inc lock for some
			table in this SQL statement we release it now */
7452

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			row_unlock_table_autoinc_for_mysql(trx);
		}
		/* Store the current undo_no of the transaction so that we
		know where to roll back if we have to roll back the next
		SQL statement */

		trx_mark_sql_stat_end(trx);
	}

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

	srv_active_wake_master_thread();

7467
	return error;
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}

/***********************************************************************
This function is used to recover X/Open XA distributed transactions   */

7473
int
7474 7475
innobase_xa_recover(
/*================*/
7476
				/* out: number of prepared transactions
7477
				stored in xid_list */
7478
	XID*	xid_list,	/* in/out: prepared transactions */
7479 7480 7481
	uint	len)		/* in: number of slots in xid_list */
{
	if (len == 0 || xid_list == NULL) {
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		return(0);
7484 7485
	}

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	return(trx_recover_for_mysql(xid_list, len));
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}

/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */

7493
int
7494 7495
innobase_commit_by_xid(
/*===================*/
7496
			/* out: 0 or error number */
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	XID*	xid)	/* in: X/Open XA transaction identification */
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{
	trx_t*	trx;

	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		innobase_commit_low(trx);
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		return(XA_OK);
	} else {
		return(XAER_NOTA);
	}
}

/***********************************************************************
This function is used to rollback one X/Open XA distributed transaction
which is in the prepared state */

7516
int
7517 7518
innobase_rollback_by_xid(
/*=====================*/
7519
			/* out: 0 or error number */
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	XID	*xid)	/* in: X/Open XA transaction identification */
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{
	trx_t*	trx;

	trx = trx_get_trx_by_xid(xid);

	if (trx) {
		return(innobase_rollback_trx(trx));
	} else {
		return(XAER_NOTA);
	}
}

7533
/***********************************************************************
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Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
7536
This consistent view is then used inside of MySQL when accessing records
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7537
using a cursor. */
7538 7539 7540 7541 7542 7543 7544 7545 7546 7547 7548

void*
innobase_create_cursor_view(void)
/*=============================*/
			/* out: Pointer to cursor view or NULL */
{
	return(read_cursor_view_create_for_mysql(
					check_trx_exists(current_thd)));
}

/***********************************************************************
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7549
Close the given consistent cursor view of a transaction and restore
7550
global read view to a transaction read view. Transaction is created if the
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7551
corresponding MySQL thread still lacks one. */
7552 7553 7554 7555 7556 7557 7558 7559 7560 7561 7562

void
innobase_close_cursor_view(
/*=======================*/
	void*	curview)/* in: Consistent read view to be closed */
{
	read_cursor_view_close_for_mysql(check_trx_exists(current_thd),
						(cursor_view_t*) curview);
}

/***********************************************************************
7563 7564
Set the given consistent cursor view to a transaction which is created
if the corresponding MySQL thread still lacks one. If the given
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consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
7567 7568 7569 7570

void
innobase_set_cursor_view(
/*=====================*/
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7571
	void*	curview)/* in: Consistent cursor view to be set */
7572
{
7573
	read_cursor_set_for_mysql(check_trx_exists(current_thd),
7574 7575 7576
						(cursor_view_t*) curview);
}

7577

7578 7579 7580
bool ha_innobase::check_if_incompatible_data(
	HA_CREATE_INFO*	info,
	uint		table_changes)
7581
{
7582
	if (table_changes != IS_EQUAL_YES) {
7583

7584 7585 7586 7587 7588 7589
		return COMPATIBLE_DATA_NO;
	}

	/* Check that auto_increment value was not changed */
	if ((info->used_fields & HA_CREATE_USED_AUTO) &&
		info->auto_increment_value != 0) {
7590

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		return COMPATIBLE_DATA_NO;
	}

	/* Check that row format didn't change */
	if ((info->used_fields & HA_CREATE_USED_AUTO) &&
		get_row_type() != info->row_type) {

		return COMPATIBLE_DATA_NO;
	}

	return COMPATIBLE_DATA_YES;
}
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7604 7605
struct st_mysql_storage_engine innobase_storage_engine=
{ MYSQL_HANDLERTON_INTERFACE_VERSION, &innobase_hton};
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mysql_declare_plugin(innobase)
{
  MYSQL_STORAGE_ENGINE_PLUGIN,
7610
  &innobase_storage_engine,
7611
  innobase_hton_name,
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  "Innobase OY",
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  "Supports transactions, row-level locking, and foreign keys",
  innobase_init, /* Plugin Init */
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  NULL, /* Plugin Deinit */
  0x0100 /* 1.0 */,
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  0
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}
mysql_declare_plugin_end;

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#endif