/***************************************************************************** Copyright (c) 2000, 2010, MySQL AB & Innobase Oy. All Rights Reserved. Copyright (c) 2008, 2009 Google Inc. Copyright (c) 2009, Percona Inc. Portions of this file contain modifications contributed and copyrighted by Google, Inc. Those modifications are gratefully acknowledged and are described briefly in the InnoDB documentation. The contributions by Google are incorporated with their permission, and subject to the conditions contained in the file COPYING.Google. Portions of this file contain modifications contributed and copyrighted by Percona Inc.. Those modifications are gratefully acknowledged and are described briefly in the InnoDB documentation. The contributions by Percona Inc. are incorporated with their permission, and subject to the conditions contained in the file COPYING.Percona. 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; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *****************************************************************************/ /* TODO list for the InnoDB handler in 5.0: - Remove the flag trx->active_flag & TRX_ACTIVE_IN_MYSQL and look at trx->conc_state - fix savepoint functions to use savepoint storage area - 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? */ #ifdef USE_PRAGMA_IMPLEMENTATION #pragma implementation // gcc: Class implementation #endif #include #include #include #include #ifdef _WIN32 #include #endif /** @file ha_innodb.cc */ /* Include necessary InnoDB headers */ extern "C" { #include "univ.i" #include "buf0lru.h" #include "btr0sea.h" #include "os0file.h" #include "os0thread.h" #include "srv0start.h" #include "srv0srv.h" #include "trx0roll.h" #include "trx0trx.h" #include "trx0sys.h" #include "mtr0mtr.h" #include "row0ins.h" #include "row0mysql.h" #include "row0sel.h" #include "row0upd.h" #include "log0log.h" #include "lock0lock.h" #include "dict0crea.h" #include "btr0cur.h" #include "btr0btr.h" #include "fsp0fsp.h" #include "sync0sync.h" #include "fil0fil.h" #include "trx0xa.h" #include "row0merge.h" #include "thr0loc.h" #include "dict0boot.h" #include "ha_prototypes.h" #include "ut0mem.h" #include "ibuf0ibuf.h" } #include "ha_innodb.h" #include "i_s.h" #ifndef MYSQL_SERVER # ifndef MYSQL_PLUGIN_IMPORT # define MYSQL_PLUGIN_IMPORT /* nothing */ # endif /* MYSQL_PLUGIN_IMPORT */ #if MYSQL_VERSION_ID < 50124 /* this is defined in mysql_priv.h inside #ifdef MYSQL_SERVER but we need it here */ bool check_global_access(THD *thd, ulong want_access); #endif /* MYSQL_VERSION_ID < 50124 */ #endif /* MYSQL_SERVER */ /** to protect innobase_open_files */ static pthread_mutex_t innobase_share_mutex; static ulong commit_threads = 0; static pthread_mutex_t commit_threads_m; static pthread_cond_t commit_cond; static pthread_mutex_t commit_cond_m; static bool innodb_inited = 0; #define INSIDE_HA_INNOBASE_CC /* In the Windows plugin, the return value of current_thd is undefined. Map it to NULL. */ #define EQ_CURRENT_THD(thd) ((thd) == current_thd) static struct handlerton* innodb_hton_ptr; static const long AUTOINC_OLD_STYLE_LOCKING = 0; static const long AUTOINC_NEW_STYLE_LOCKING = 1; static const long AUTOINC_NO_LOCKING = 2; static long innobase_mirrored_log_groups, innobase_log_files_in_group, innobase_log_buffer_size, innobase_additional_mem_pool_size, innobase_file_io_threads, innobase_force_recovery, innobase_open_files, innobase_autoinc_lock_mode; static ulong innobase_commit_concurrency = 0; static ulong innobase_read_io_threads; static ulong innobase_write_io_threads; static long long innobase_buffer_pool_size, innobase_log_file_size; /** Percentage of the buffer pool to reserve for 'old' blocks. Connected to buf_LRU_old_ratio. */ static uint innobase_old_blocks_pct; /* The default values for the following char* start-up parameters are determined in innobase_init below: */ static char* innobase_data_home_dir = NULL; static char* innobase_data_file_path = NULL; static char* innobase_log_group_home_dir = NULL; static char* innobase_file_format_name = NULL; static char* innobase_change_buffering = NULL; /* Note: This variable can be set to on/off and any of the supported file formats in the configuration file, but can only be set to any of the supported file formats during runtime. */ static char* innobase_file_format_check = NULL; static char* innobase_file_flush_method = NULL; /* Below we have boolean-valued start-up parameters, and their default values */ static ulong innobase_fast_shutdown = 1; #ifdef UNIV_LOG_ARCHIVE static my_bool innobase_log_archive = FALSE; static char* innobase_log_arch_dir = NULL; #endif /* UNIV_LOG_ARCHIVE */ static my_bool innobase_use_doublewrite = TRUE; static my_bool innobase_use_checksums = TRUE; static my_bool innobase_locks_unsafe_for_binlog = FALSE; static my_bool innobase_rollback_on_timeout = FALSE; static my_bool innobase_create_status_file = FALSE; static my_bool innobase_stats_on_metadata = TRUE; static char* internal_innobase_data_file_path = NULL; static char* innodb_version_str = (char*) INNODB_VERSION_STR; /** Possible values for system variable "innodb_stats_method". The values are defined the same as its corresponding MyISAM system variable "myisam_stats_method"(see "myisam_stats_method_names"), for better usability */ static const char* innodb_stats_method_names[] = { "nulls_equal", "nulls_unequal", "nulls_ignored", NullS }; /** Used to define an enumerate type of the system variable innodb_stats_method. This is the same as "myisam_stats_method_typelib" */ static TYPELIB innodb_stats_method_typelib = { array_elements(innodb_stats_method_names) - 1, "innodb_stats_method_typelib", innodb_stats_method_names, NULL }; /* The following counter is used to convey information to InnoDB 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 static ulong innobase_active_counter = 0; static hash_table_t* innobase_open_tables; #ifdef __NETWARE__ /* some special cleanup for NetWare */ bool nw_panic = FALSE; #endif /** Allowed values of innodb_change_buffering */ static const char* innobase_change_buffering_values[IBUF_USE_COUNT] = { "none", /* IBUF_USE_NONE */ "inserts" /* IBUF_USE_INSERT */ }; static INNOBASE_SHARE *get_share(const char *table_name); static void free_share(INNOBASE_SHARE *share); static int innobase_close_connection(handlerton *hton, THD* thd); static void innobase_commit_ordered(handlerton *hton, THD* thd, bool all); static int innobase_commit(handlerton *hton, THD* thd, bool all); static int innobase_rollback(handlerton *hton, THD* thd, bool all); static int innobase_rollback_to_savepoint(handlerton *hton, THD* thd, void *savepoint); static int innobase_savepoint(handlerton *hton, THD* thd, void *savepoint); static int innobase_release_savepoint(handlerton *hton, THD* thd, void *savepoint); static handler *innobase_create_handler(handlerton *hton, TABLE_SHARE *table, MEM_ROOT *mem_root); /* "GEN_CLUST_INDEX" is the name reserved for Innodb default system primary index. */ static const char innobase_index_reserve_name[]= "GEN_CLUST_INDEX"; /** @brief Initialize the default value of innodb_commit_concurrency. Once InnoDB is running, the innodb_commit_concurrency must not change from zero to nonzero. (Bug #42101) The initial default value is 0, and without this extra initialization, SET GLOBAL innodb_commit_concurrency=DEFAULT would set the parameter to 0, even if it was initially set to nonzero at the command line or configuration file. */ static void innobase_commit_concurrency_init_default(void); /*==========================================*/ /************************************************************//** Validate the file format name and return its corresponding id. @return valid file format id */ static uint innobase_file_format_name_lookup( /*=============================*/ const char* format_name); /*!< in: pointer to file format name */ /************************************************************//** Validate the file format check config parameters, as a side effect it sets the srv_check_file_format_at_startup variable. @return true if one of "on" or "off" */ static bool innobase_file_format_check_on_off( /*==============================*/ const char* format_check); /*!< in: parameter value */ /************************************************************//** Validate the file format check config parameters, as a side effect it sets the srv_check_file_format_at_startup variable. @return the format_id if valid config value, otherwise, return -1 */ static int innobase_file_format_validate_and_set( /*================================*/ const char* format_check); /*!< in: parameter value */ /****************************************************************//** Return alter table flags supported in an InnoDB database. */ static uint innobase_alter_table_flags( /*=======================*/ uint flags); static const char innobase_hton_name[]= "InnoDB"; /*************************************************************//** Check for a valid value of innobase_commit_concurrency. @return 0 for valid innodb_commit_concurrency */ static int innobase_commit_concurrency_validate( /*=================================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* save, /*!< out: immediate result for update function */ struct st_mysql_value* value) /*!< in: incoming string */ { long long intbuf; ulong commit_concurrency; DBUG_ENTER("innobase_commit_concurrency_validate"); if (value->val_int(value, &intbuf)) { /* The value is NULL. That is invalid. */ DBUG_RETURN(1); } *reinterpret_cast(save) = commit_concurrency = static_cast(intbuf); /* Allow the value to be updated, as long as it remains zero or nonzero. */ DBUG_RETURN(!(!commit_concurrency == !innobase_commit_concurrency)); } static MYSQL_THDVAR_BOOL(support_xa, PLUGIN_VAR_OPCMDARG, "Enable InnoDB support for the XA two-phase commit", /* check_func */ NULL, /* update_func */ NULL, /* default */ TRUE); static MYSQL_THDVAR_BOOL(table_locks, PLUGIN_VAR_OPCMDARG, "Enable InnoDB locking in LOCK TABLES", /* check_func */ NULL, /* update_func */ NULL, /* default */ TRUE); static MYSQL_THDVAR_BOOL(strict_mode, PLUGIN_VAR_OPCMDARG, "Use strict mode when evaluating create options.", NULL, NULL, FALSE); static MYSQL_THDVAR_ULONG(lock_wait_timeout, PLUGIN_VAR_RQCMDARG, "Timeout in seconds an InnoDB transaction may wait for a lock before being rolled back. Values above 100000000 disable the timeout.", NULL, NULL, 50, 1, 1024 * 1024 * 1024, 0); static handler *innobase_create_handler(handlerton *hton, TABLE_SHARE *table, MEM_ROOT *mem_root) { return new (mem_root) ha_innobase(hton, table); } /*******************************************************************//** This function is used to prepare an X/Open XA distributed transaction. @return 0 or error number */ static int innobase_xa_prepare( /*================*/ handlerton* hton, /*!< in: InnoDB handlerton */ 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 */ /*******************************************************************//** This function is used to recover X/Open XA distributed transactions. @return number of prepared transactions stored in xid_list */ static int innobase_xa_recover( /*================*/ handlerton* hton, /*!< in: InnoDB handlerton */ XID* xid_list,/*!< in/out: prepared transactions */ uint len); /*!< in: number of slots in xid_list */ /*******************************************************************//** This function is used to commit one X/Open XA distributed transaction which is in the prepared state @return 0 or error number */ static int innobase_commit_by_xid( /*===================*/ handlerton* hton, XID* xid); /*!< in: X/Open XA transaction identification */ /*******************************************************************//** This function is used to rollback one X/Open XA distributed transaction which is in the prepared state @return 0 or error number */ static int innobase_rollback_by_xid( /*=====================*/ handlerton* hton, /*!< in: InnoDB handlerton */ XID* xid); /*!< in: X/Open XA transaction identification */ /*******************************************************************//** Create a consistent view for a cursor based on current transaction which is created if the corresponding MySQL thread still lacks one. This consistent view is then used inside of MySQL when accessing records using a cursor. @return pointer to cursor view or NULL */ static void* innobase_create_cursor_view( /*========================*/ handlerton* hton, /*!< in: innobase hton */ THD* thd); /*!< in: user thread handle */ /*******************************************************************//** Set the given consistent cursor view to a transaction which is created if the corresponding MySQL thread still lacks one. If the given consistent cursor view is NULL global read view of a transaction is restored to a transaction read view. */ static void innobase_set_cursor_view( /*=====================*/ handlerton* hton, THD* thd, /*!< in: user thread handle */ void* curview);/*!< in: Consistent cursor view to be set */ /*******************************************************************//** Close the given consistent cursor view of a transaction and restore global read view to a transaction read view. Transaction is created if the corresponding MySQL thread still lacks one. */ static void innobase_close_cursor_view( /*=======================*/ handlerton* hton, THD* thd, /*!< in: user thread handle */ void* curview);/*!< in: Consistent read view to be closed */ /*****************************************************************//** Removes all tables in the named database inside InnoDB. */ static void innobase_drop_database( /*===================*/ handlerton* hton, /*!< in: handlerton of Innodb */ 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' */ /*******************************************************************//** Closes an InnoDB database. */ static int innobase_end(handlerton *hton, ha_panic_function type); /*****************************************************************//** 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. @return 0 */ static int innobase_start_trx_and_assign_read_view( /*====================================*/ /* out: 0 */ handlerton* hton, /* in: Innodb handlerton */ THD* thd); /* in: MySQL thread handle of the user for whom the transaction should be committed */ /****************************************************************//** 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. @return TRUE if error */ static bool innobase_flush_logs( /*================*/ handlerton* hton); /*!< in: InnoDB handlerton */ /************************************************************************//** Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB Monitor to the client. */ static bool innodb_show_status( /*===============*/ handlerton* hton, /*!< in: the innodb handlerton */ THD* thd, /*!< in: the MySQL query thread of the caller */ stat_print_fn *stat_print); static bool innobase_show_status(handlerton *hton, THD* thd, stat_print_fn* stat_print, enum ha_stat_type stat_type); /*****************************************************************//** Commits a transaction in an InnoDB database. */ static void innobase_commit_low( /*================*/ trx_t* trx); /*!< in: transaction handle */ static SHOW_VAR innodb_status_variables[]= { {"buffer_pool_pages_data", (char*) &export_vars.innodb_buffer_pool_pages_data, SHOW_LONG}, {"buffer_pool_pages_dirty", (char*) &export_vars.innodb_buffer_pool_pages_dirty, SHOW_LONG}, {"buffer_pool_pages_flushed", (char*) &export_vars.innodb_buffer_pool_pages_flushed, SHOW_LONG}, {"buffer_pool_pages_free", (char*) &export_vars.innodb_buffer_pool_pages_free, SHOW_LONG}, #ifdef UNIV_DEBUG {"buffer_pool_pages_latched", (char*) &export_vars.innodb_buffer_pool_pages_latched, SHOW_LONG}, #endif /* UNIV_DEBUG */ {"buffer_pool_pages_misc", (char*) &export_vars.innodb_buffer_pool_pages_misc, SHOW_LONG}, {"buffer_pool_pages_total", (char*) &export_vars.innodb_buffer_pool_pages_total, SHOW_LONG}, {"buffer_pool_read_ahead", (char*) &export_vars.innodb_buffer_pool_read_ahead, SHOW_LONG}, {"buffer_pool_read_ahead_evicted", (char*) &export_vars.innodb_buffer_pool_read_ahead_evicted, SHOW_LONG}, {"buffer_pool_read_requests", (char*) &export_vars.innodb_buffer_pool_read_requests, SHOW_LONG}, {"buffer_pool_reads", (char*) &export_vars.innodb_buffer_pool_reads, SHOW_LONG}, {"buffer_pool_wait_free", (char*) &export_vars.innodb_buffer_pool_wait_free, SHOW_LONG}, {"buffer_pool_write_requests", (char*) &export_vars.innodb_buffer_pool_write_requests, SHOW_LONG}, {"data_fsyncs", (char*) &export_vars.innodb_data_fsyncs, SHOW_LONG}, {"data_pending_fsyncs", (char*) &export_vars.innodb_data_pending_fsyncs, SHOW_LONG}, {"data_pending_reads", (char*) &export_vars.innodb_data_pending_reads, SHOW_LONG}, {"data_pending_writes", (char*) &export_vars.innodb_data_pending_writes, SHOW_LONG}, {"data_read", (char*) &export_vars.innodb_data_read, SHOW_LONG}, {"data_reads", (char*) &export_vars.innodb_data_reads, SHOW_LONG}, {"data_writes", (char*) &export_vars.innodb_data_writes, SHOW_LONG}, {"data_written", (char*) &export_vars.innodb_data_written, SHOW_LONG}, {"dblwr_pages_written", (char*) &export_vars.innodb_dblwr_pages_written, SHOW_LONG}, {"dblwr_writes", (char*) &export_vars.innodb_dblwr_writes, SHOW_LONG}, {"have_atomic_builtins", (char*) &export_vars.innodb_have_atomic_builtins, SHOW_BOOL}, {"log_waits", (char*) &export_vars.innodb_log_waits, SHOW_LONG}, {"log_write_requests", (char*) &export_vars.innodb_log_write_requests, SHOW_LONG}, {"log_writes", (char*) &export_vars.innodb_log_writes, SHOW_LONG}, {"os_log_fsyncs", (char*) &export_vars.innodb_os_log_fsyncs, SHOW_LONG}, {"os_log_pending_fsyncs", (char*) &export_vars.innodb_os_log_pending_fsyncs, SHOW_LONG}, {"os_log_pending_writes", (char*) &export_vars.innodb_os_log_pending_writes, SHOW_LONG}, {"os_log_written", (char*) &export_vars.innodb_os_log_written, SHOW_LONG}, {"page_size", (char*) &export_vars.innodb_page_size, SHOW_LONG}, {"pages_created", (char*) &export_vars.innodb_pages_created, SHOW_LONG}, {"pages_read", (char*) &export_vars.innodb_pages_read, SHOW_LONG}, {"pages_written", (char*) &export_vars.innodb_pages_written, SHOW_LONG}, {"row_lock_current_waits", (char*) &export_vars.innodb_row_lock_current_waits, SHOW_LONG}, {"row_lock_time", (char*) &export_vars.innodb_row_lock_time, SHOW_LONGLONG}, {"row_lock_time_avg", (char*) &export_vars.innodb_row_lock_time_avg, SHOW_LONG}, {"row_lock_time_max", (char*) &export_vars.innodb_row_lock_time_max, SHOW_LONG}, {"row_lock_waits", (char*) &export_vars.innodb_row_lock_waits, SHOW_LONG}, {"rows_deleted", (char*) &export_vars.innodb_rows_deleted, SHOW_LONG}, {"rows_inserted", (char*) &export_vars.innodb_rows_inserted, SHOW_LONG}, {"rows_read", (char*) &export_vars.innodb_rows_read, SHOW_LONG}, {"rows_updated", (char*) &export_vars.innodb_rows_updated, SHOW_LONG}, {NullS, NullS, SHOW_LONG} }; /* General functions */ /******************************************************************//** Returns true if the thread is the replication thread on the slave server. Used in srv_conc_enter_innodb() to determine if the thread should be allowed to enter InnoDB - the replication thread is treated differently than other threads. Also used in srv_conc_force_exit_innodb(). @return true if thd is the replication thread */ extern "C" UNIV_INTERN ibool thd_is_replication_slave_thread( /*============================*/ void* thd) /*!< in: thread handle (THD*) */ { return((ibool) thd_slave_thread((THD*) thd)); } /******************************************************************//** Save some CPU by testing the value of srv_thread_concurrency in inline functions. */ static inline void innodb_srv_conc_enter_innodb( /*=========================*/ trx_t* trx) /*!< in: transaction handle */ { if (UNIV_LIKELY(!srv_thread_concurrency)) { return; } srv_conc_enter_innodb(trx); } /******************************************************************//** Save some CPU by testing the value of srv_thread_concurrency in inline functions. */ static inline void innodb_srv_conc_exit_innodb( /*========================*/ trx_t* trx) /*!< in: transaction handle */ { if (UNIV_LIKELY(!trx->declared_to_be_inside_innodb)) { return; } srv_conc_exit_innodb(trx); } /******************************************************************//** Releases possible search latch and InnoDB thread FIFO ticket. These should 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. */ static inline 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); } } /******************************************************************//** Returns true if the transaction this thread is processing has edited non-transactional tables. Used by the deadlock detector when deciding which transaction to rollback in case of a deadlock - we try to avoid rolling back transactions that have edited non-transactional tables. @return true if non-transactional tables have been edited */ extern "C" UNIV_INTERN ibool thd_has_edited_nontrans_tables( /*===========================*/ void* thd) /*!< in: thread handle (THD*) */ { return((ibool) thd_non_transactional_update((THD*) thd)); } /******************************************************************//** Returns true if the thread is executing a SELECT statement. @return true if thd is executing SELECT */ extern "C" UNIV_INTERN ibool thd_is_select( /*==========*/ const void* thd) /*!< in: thread handle (THD*) */ { return(thd_sql_command((const THD*) thd) == SQLCOM_SELECT); } /******************************************************************//** Returns true if the thread supports XA, global value of innodb_supports_xa if thd is NULL. @return true if thd has XA support */ extern "C" UNIV_INTERN ibool thd_supports_xa( /*============*/ void* thd) /*!< in: thread handle (THD*), or NULL to query the global innodb_supports_xa */ { return(THDVAR((THD*) thd, support_xa)); } /******************************************************************//** Returns the lock wait timeout for the current connection. @return the lock wait timeout, in seconds */ extern "C" UNIV_INTERN ulong thd_lock_wait_timeout( /*==================*/ void* thd) /*!< in: thread handle (THD*), or NULL to query the global innodb_lock_wait_timeout */ { /* According to , passing thd == NULL returns the global value of the session variable. */ return(THDVAR((THD*) thd, lock_wait_timeout)); } /********************************************************************//** Obtain the InnoDB transaction of a MySQL thread. @return reference to transaction pointer */ static inline trx_t*& thd_to_trx( /*=======*/ THD* thd) /*!< in: MySQL thread */ { return(*(trx_t**) thd_ha_data(thd, innodb_hton_ptr)); } /********************************************************************//** 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. @return 0 */ static int innobase_release_temporary_latches( /*===============================*/ handlerton* hton, /*!< in: handlerton */ THD* thd) /*!< in: MySQL thread */ { trx_t* trx; DBUG_ASSERT(hton == innodb_hton_ptr); if (!innodb_inited) { return(0); } trx = thd_to_trx(thd); if (trx) { innobase_release_stat_resources(trx); } return(0); } /********************************************************************//** 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. */ static inline void innobase_active_small(void) /*=======================*/ { innobase_active_counter++; if ((innobase_active_counter % INNOBASE_WAKE_INTERVAL) == 0) { srv_active_wake_master_thread(); } } /********************************************************************//** 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. @return MySQL error code */ extern "C" UNIV_INTERN int convert_error_code_to_mysql( /*========================*/ int error, /*!< in: InnoDB error code */ ulint flags, /*!< in: InnoDB table flags, or 0 */ THD* thd) /*!< in: user thread handle or NULL */ { switch (error) { case DB_SUCCESS: return(0); case DB_INTERRUPTED: my_error(ER_QUERY_INTERRUPTED, MYF(0)); /* fall through */ case DB_FOREIGN_EXCEED_MAX_CASCADE: push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, HA_ERR_ROW_IS_REFERENCED, "InnoDB: Cannot delete/update " "rows with cascading foreign key " "constraints that exceed max " "depth of %d. Please " "drop extra constraints and try " "again", DICT_FK_MAX_RECURSIVE_LOAD); /* fall through */ case DB_ERROR: default: return(-1); /* unspecified error */ case DB_DUPLICATE_KEY: /* Be cautious with returning this error, since mysql could re-enter the storage layer to get duplicated key info, the operation requires a valid table handle and/or transaction information, which might not always be available in the error handling stage. */ return(HA_ERR_FOUND_DUPP_KEY); case DB_FOREIGN_DUPLICATE_KEY: return(HA_ERR_FOREIGN_DUPLICATE_KEY); case DB_MISSING_HISTORY: return(HA_ERR_TABLE_DEF_CHANGED); case DB_RECORD_NOT_FOUND: return(HA_ERR_NO_ACTIVE_RECORD); case 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 */ if (thd) { thd_mark_transaction_to_rollback(thd, TRUE); } return(HA_ERR_LOCK_DEADLOCK); case DB_LOCK_WAIT_TIMEOUT: /* 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. */ if (thd) { thd_mark_transaction_to_rollback( thd, (bool)row_rollback_on_timeout); } return(HA_ERR_LOCK_WAIT_TIMEOUT); case DB_NO_REFERENCED_ROW: return(HA_ERR_NO_REFERENCED_ROW); case DB_ROW_IS_REFERENCED: return(HA_ERR_ROW_IS_REFERENCED); case DB_CANNOT_ADD_CONSTRAINT: return(HA_ERR_CANNOT_ADD_FOREIGN); case DB_CANNOT_DROP_CONSTRAINT: return(HA_ERR_ROW_IS_REFERENCED); /* TODO: This is a bit misleading, a new MySQL error code should be introduced */ case DB_COL_APPEARS_TWICE_IN_INDEX: case DB_CORRUPTION: return(HA_ERR_CRASHED); case DB_OUT_OF_FILE_SPACE: return(HA_ERR_RECORD_FILE_FULL); case DB_TABLE_IS_BEING_USED: return(HA_ERR_WRONG_COMMAND); case DB_TABLE_NOT_FOUND: return(HA_ERR_NO_SUCH_TABLE); case DB_TOO_BIG_RECORD: my_error(ER_TOO_BIG_ROWSIZE, MYF(0), page_get_free_space_of_empty(flags & DICT_TF_COMPACT) / 2); return(HA_ERR_TO_BIG_ROW); case DB_NO_SAVEPOINT: return(HA_ERR_NO_SAVEPOINT); case 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 */ if (thd) { thd_mark_transaction_to_rollback(thd, TRUE); } return(HA_ERR_LOCK_TABLE_FULL); case DB_PRIMARY_KEY_IS_NULL: return(ER_PRIMARY_CANT_HAVE_NULL); case DB_TOO_MANY_CONCURRENT_TRXS: /* New error code HA_ERR_TOO_MANY_CONCURRENT_TRXS is only available in 5.1.38 and later, but the plugin should still work with previous versions of MySQL. */ #ifdef HA_ERR_TOO_MANY_CONCURRENT_TRXS return(HA_ERR_TOO_MANY_CONCURRENT_TRXS); #else /* HA_ERR_TOO_MANY_CONCURRENT_TRXS */ return(HA_ERR_RECORD_FILE_FULL); #endif /* HA_ERR_TOO_MANY_CONCURRENT_TRXS */ case DB_UNSUPPORTED: return(HA_ERR_UNSUPPORTED); } } /*************************************************************//** Prints info of a THD object (== user session thread) to the given file. */ extern "C" UNIV_INTERN void innobase_mysql_print_thd( /*=====================*/ FILE* f, /*!< in: output stream */ void* thd, /*!< in: pointer to a MySQL THD object */ uint max_query_len) /*!< in: max query length to print, or 0 to use the default max length */ { char buffer[1024]; fputs(thd_security_context((THD*) thd, buffer, sizeof buffer, max_query_len), f); putc('\n', f); } /******************************************************************//** Get the variable length bounds of the given character set. */ extern "C" UNIV_INTERN void innobase_get_cset_width( /*====================*/ 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) */ { CHARSET_INFO* cs; ut_ad(cset < 256); ut_ad(mbminlen); ut_ad(mbmaxlen); cs = all_charsets[cset]; if (cs) { *mbminlen = cs->mbminlen; *mbmaxlen = cs->mbmaxlen; } else { THD* thd = current_thd; if (thd && thd_sql_command(thd) == SQLCOM_DROP_TABLE) { /* Fix bug#46256: allow tables to be dropped if the collation is not found, but issue a warning. */ if ((global_system_variables.log_warnings) && (cset != 0)){ sql_print_warning( "Unknown collation #%lu.", cset); } } else { ut_a(cset == 0); } *mbminlen = *mbmaxlen = 0; } } /******************************************************************//** Converts an identifier to a table name. */ extern "C" UNIV_INTERN void innobase_convert_from_table_id( /*===========================*/ struct charset_info_st* cs, /*!< in: the 'from' character set */ char* to, /*!< out: converted identifier */ const char* from, /*!< in: identifier to convert */ ulint len) /*!< in: length of 'to', in bytes */ { uint errors; strconvert(cs, from, &my_charset_filename, to, (uint) len, &errors); } /******************************************************************//** Converts an identifier to UTF-8. */ extern "C" UNIV_INTERN void innobase_convert_from_id( /*=====================*/ struct charset_info_st* cs, /*!< in: the 'from' character set */ char* to, /*!< out: converted identifier */ const char* from, /*!< in: identifier to convert */ ulint len) /*!< in: length of 'to', in bytes */ { uint errors; strconvert(cs, from, system_charset_info, to, (uint) len, &errors); } /******************************************************************//** Compares NUL-terminated UTF-8 strings case insensitively. @return 0 if a=b, <0 if a1 if a>b */ extern "C" UNIV_INTERN int innobase_strcasecmp( /*================*/ 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. */ extern "C" UNIV_INTERN void innobase_casedn_str( /*================*/ char* a) /*!< in/out: string to put in lower case */ { my_casedn_str(system_charset_info, a); } /**********************************************************************//** Determines the connection character set. @return connection character set */ extern "C" UNIV_INTERN struct charset_info_st* innobase_get_charset( /*=================*/ void* mysql_thd) /*!< in: MySQL thread handle */ { return(thd_charset((THD*) mysql_thd)); } /**********************************************************************//** Determines the current SQL statement. @return SQL statement string */ extern "C" UNIV_INTERN const char* innobase_get_stmt( /*==============*/ void* mysql_thd, /*!< in: MySQL thread handle */ size_t* length) /*!< out: length of the SQL statement */ { #if MYSQL_VERSION_ID >= 50142 LEX_STRING* stmt; stmt = thd_query_string((THD*) mysql_thd); *length = stmt->length; return(stmt->str); #else const char* stmt_str = thd_query((THD*) mysql_thd); *length = strlen(stmt_str); return(stmt_str); #endif } #if defined (__WIN__) && defined (MYSQL_DYNAMIC_PLUGIN) extern MYSQL_PLUGIN_IMPORT MY_TMPDIR mysql_tmpdir_list; /*******************************************************************//** Map an OS error to an errno value. The OS error number is stored in _doserrno and the mapped value is stored in errno) */ extern "C" void __cdecl _dosmaperr( unsigned long); /*!< in: OS error value */ /*********************************************************************//** Creates a temporary file. @return temporary file descriptor, or < 0 on error */ extern "C" UNIV_INTERN int innobase_mysql_tmpfile(void) /*========================*/ { int fd; /* handle of opened file */ HANDLE osfh; /* OS handle of opened file */ char* tmpdir; /* point to the directory where to create file */ TCHAR path_buf[MAX_PATH - 14]; /* buffer for tmp file path. The length cannot be longer than MAX_PATH - 14, or GetTempFileName will fail. */ char filename[MAX_PATH]; /* name of the tmpfile */ DWORD fileaccess = GENERIC_READ /* OS file access */ | GENERIC_WRITE | DELETE; DWORD fileshare = FILE_SHARE_READ /* OS file sharing mode */ | FILE_SHARE_WRITE | FILE_SHARE_DELETE; DWORD filecreate = CREATE_ALWAYS; /* OS method of open/create */ DWORD fileattrib = /* OS file attribute flags */ FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE | FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_SEQUENTIAL_SCAN; DBUG_ENTER("innobase_mysql_tmpfile"); tmpdir = my_tmpdir(&mysql_tmpdir_list); /* The tmpdir parameter can not be NULL for GetTempFileName. */ if (!tmpdir) { uint ret; /* Use GetTempPath to determine path for temporary files. */ ret = GetTempPath(sizeof(path_buf), path_buf); if (ret > sizeof(path_buf) || (ret == 0)) { _dosmaperr(GetLastError()); /* map error */ DBUG_RETURN(-1); } tmpdir = path_buf; } /* Use GetTempFileName to generate a unique filename. */ if (!GetTempFileName(tmpdir, "ib", 0, filename)) { _dosmaperr(GetLastError()); /* map error */ DBUG_RETURN(-1); } DBUG_PRINT("info", ("filename: %s", filename)); /* Open/Create the file. */ osfh = CreateFile(filename, fileaccess, fileshare, NULL, filecreate, fileattrib, NULL); if (osfh == INVALID_HANDLE_VALUE) { /* open/create file failed! */ _dosmaperr(GetLastError()); /* map error */ DBUG_RETURN(-1); } do { /* Associates a CRT file descriptor with the OS file handle. */ fd = _open_osfhandle((intptr_t) osfh, 0); } while (fd == -1 && errno == EINTR); if (fd == -1) { /* Open failed, close the file handle. */ _dosmaperr(GetLastError()); /* map error */ CloseHandle(osfh); /* no need to check if CloseHandle fails */ } DBUG_RETURN(fd); } #else /*********************************************************************//** Creates a temporary file. @return temporary file descriptor, or < 0 on error */ extern "C" UNIV_INTERN int innobase_mysql_tmpfile(void) /*========================*/ { int fd2 = -1; File fd = mysql_tmpfile("ib"); if (fd >= 0) { /* 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(). */ #ifdef _WIN32 /* Note that on Windows, the integer returned by mysql_tmpfile has no relation to C runtime file descriptor. Here, we need to call my_get_osfhandle to get the HANDLE and then convert it to C runtime filedescriptor. */ { HANDLE hFile = my_get_osfhandle(fd); HANDLE hDup; BOOL bOK = DuplicateHandle(GetCurrentProcess(), hFile, GetCurrentProcess(), &hDup, 0, FALSE, DUPLICATE_SAME_ACCESS); if(bOK) { fd2 = _open_osfhandle((intptr_t)hDup,0); } else { my_osmaperr(GetLastError()); fd2 = -1; } } #else fd2 = dup(fd); #endif if (fd2 < 0) { DBUG_PRINT("error",("Got error %d on dup",fd2)); my_errno=errno; my_error(EE_OUT_OF_FILERESOURCES, MYF(ME_BELL+ME_WAITTANG), "ib*", my_errno); } my_close(fd, MYF(MY_WME)); } return(fd2); } #endif /* defined (__WIN__) && defined (MYSQL_DYNAMIC_PLUGIN) */ /*********************************************************************//** Wrapper around MySQL's copy_and_convert function. @return number of bytes copied to 'to' */ extern "C" UNIV_INTERN ulint innobase_convert_string( /*====================*/ void* to, /*!< out: converted string */ ulint to_length, /*!< in: number of bytes reserved for the converted string */ CHARSET_INFO* to_cs, /*!< in: character set to convert to */ const void* from, /*!< in: string to convert */ ulint from_length, /*!< in: number of bytes to convert */ CHARSET_INFO* from_cs, /*!< in: character set to convert from */ uint* errors) /*!< out: number of errors encountered during the conversion */ { return(copy_and_convert((char*)to, (uint32) to_length, to_cs, (const char*)from, (uint32) from_length, from_cs, errors)); } /*******************************************************************//** Formats the raw data in "data" (in InnoDB on-disk format) that is of type DATA_(CHAR|VARCHAR|MYSQL|VARMYSQL) using "charset_coll" and writes the result to "buf". The result is converted to "system_charset_info". Not more than "buf_size" bytes are written to "buf". The result is always NUL-terminated (provided buf_size > 0) and the number of bytes that were written to "buf" is returned (including the terminating NUL). @return number of bytes that were written */ extern "C" UNIV_INTERN ulint innobase_raw_format( /*================*/ const char* data, /*!< in: raw data */ ulint data_len, /*!< in: raw data length in bytes */ ulint charset_coll, /*!< in: charset collation */ char* buf, /*!< out: output buffer */ ulint buf_size) /*!< in: output buffer size in bytes */ { /* XXX we use a hard limit instead of allocating but_size bytes from the heap */ CHARSET_INFO* data_cs; char buf_tmp[8192]; ulint buf_tmp_used; uint num_errors; data_cs = all_charsets[charset_coll]; buf_tmp_used = innobase_convert_string(buf_tmp, sizeof(buf_tmp), system_charset_info, data, data_len, data_cs, &num_errors); return(ut_str_sql_format(buf_tmp, buf_tmp_used, buf, buf_size)); } /*********************************************************************//** Compute the next autoinc value. For MySQL replication the autoincrement values can be partitioned among the nodes. The offset is the start or origin of the autoincrement value for a particular node. For n nodes the increment will be n and the offset will be in the interval [1, n]. The formula tries to allocate the next value for a particular node. Note: This function is also called with increment set to the number of values we want to reserve for multi-value inserts e.g., INSERT INTO T VALUES(), (), (); innobase_next_autoinc() will be called with increment set to n * 3 where autoinc_lock_mode != TRADITIONAL because we want to reserve 3 values for the multi-value INSERT above. @return the next value */ static ulonglong innobase_next_autoinc( /*==================*/ ulonglong current, /*!< in: Current value */ ulonglong increment, /*!< in: increment current by */ ulonglong offset, /*!< in: AUTOINC offset */ ulonglong max_value) /*!< in: max value for type */ { ulonglong next_value; /* Should never be 0. */ ut_a(increment > 0); /* According to MySQL documentation, if the offset is greater than the increment then the offset is ignored. */ if (offset > increment) { offset = 0; } if (max_value <= current) { next_value = max_value; } else if (offset <= 1) { /* Offset 0 and 1 are the same, because there must be at least one node in the system. */ if (max_value - current <= increment) { next_value = max_value; } else { next_value = current + increment; } } else if (max_value > current) { if (current > offset) { next_value = ((current - offset) / increment) + 1; } else { next_value = ((offset - current) / increment) + 1; } ut_a(increment > 0); ut_a(next_value > 0); /* Check for multiplication overflow. */ if (increment > (max_value / next_value)) { next_value = max_value; } else { next_value *= increment; ut_a(max_value >= next_value); /* Check for overflow. */ if (max_value - next_value <= offset) { next_value = max_value; } else { next_value += offset; } } } else { next_value = max_value; } ut_a(next_value <= max_value); return(next_value); } /*********************************************************************//** Initializes some fields in an InnoDB transaction object. */ static void innobase_trx_init( /*==============*/ THD* thd, /*!< in: user thread handle */ trx_t* trx) /*!< in/out: InnoDB transaction handle */ { DBUG_ENTER("innobase_trx_init"); DBUG_ASSERT(thd == trx->mysql_thd); trx->check_foreigns = !thd_test_options( thd, OPTION_NO_FOREIGN_KEY_CHECKS); trx->check_unique_secondary = !thd_test_options( thd, OPTION_RELAXED_UNIQUE_CHECKS); DBUG_VOID_RETURN; } /*********************************************************************//** Allocates an InnoDB transaction for a MySQL handler object. @return InnoDB transaction handle */ extern "C" UNIV_INTERN trx_t* innobase_trx_allocate( /*==================*/ THD* thd) /*!< in: user thread handle */ { trx_t* trx; DBUG_ENTER("innobase_trx_allocate"); DBUG_ASSERT(thd != NULL); DBUG_ASSERT(EQ_CURRENT_THD(thd)); trx = trx_allocate_for_mysql(); trx->mysql_thd = thd; innobase_trx_init(thd, trx); DBUG_RETURN(trx); } /*********************************************************************//** Gets the InnoDB transaction handle for a MySQL handler object, creates an InnoDB transaction struct if the corresponding MySQL thread struct still lacks one. @return InnoDB transaction handle */ static trx_t* check_trx_exists( /*=============*/ THD* thd) /*!< in: user thread handle */ { trx_t*& trx = thd_to_trx(thd); if (trx == NULL) { trx = innobase_trx_allocate(thd); } else if (UNIV_UNLIKELY(trx->magic_n != TRX_MAGIC_N)) { mem_analyze_corruption(trx); ut_error; } innobase_trx_init(thd, trx); return(trx); } /*********************************************************************//** Construct ha_innobase handler. */ UNIV_INTERN ha_innobase::ha_innobase(handlerton *hton, TABLE_SHARE *table_arg) :handler(hton, table_arg), int_table_flags(HA_REC_NOT_IN_SEQ | HA_NULL_IN_KEY | HA_CAN_INDEX_BLOBS | HA_CAN_SQL_HANDLER | HA_PRIMARY_KEY_REQUIRED_FOR_POSITION | HA_PRIMARY_KEY_IN_READ_INDEX | HA_BINLOG_ROW_CAPABLE | HA_CAN_GEOMETRY | HA_PARTIAL_COLUMN_READ | HA_TABLE_SCAN_ON_INDEX), start_of_scan(0), num_write_row(0) {} /*********************************************************************//** Destruct ha_innobase handler. */ UNIV_INTERN ha_innobase::~ha_innobase() { } /*********************************************************************//** Updates the user_thd field in a handle and also allocates a new InnoDB transaction handle if needed, and updates the transaction fields in the prebuilt struct. */ UNIV_INTERN inline void ha_innobase::update_thd( /*====================*/ THD* thd) /*!< in: thd to use the handle */ { trx_t* trx; trx = check_trx_exists(thd); if (prebuilt->trx != trx) { row_update_prebuilt_trx(prebuilt, trx); } user_thd = thd; } /*********************************************************************//** Updates the user_thd field in a handle and also allocates a new InnoDB transaction handle if needed, and updates the transaction fields in the prebuilt struct. */ UNIV_INTERN void ha_innobase::update_thd() /*=====================*/ { THD* thd = ha_thd(); ut_ad(EQ_CURRENT_THD(thd)); update_thd(thd); } /*********************************************************************//** 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. */ static inline void innobase_register_stmt( /*===================*/ handlerton* hton, /*!< in: Innobase hton */ THD* thd) /*!< in: MySQL thd (connection) object */ { DBUG_ASSERT(hton == innodb_hton_ptr); /* Register the statement */ trans_register_ha(thd, FALSE, hton); } /*********************************************************************//** 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. */ static inline void innobase_register_trx_and_stmt( /*===========================*/ handlerton *hton, /*!< in: Innobase handlerton */ 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(hton, thd); if (thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) { /* No autocommit mode, register for a transaction */ trans_register_ha(thd, TRUE, hton); } } /* 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 id <= INV_TRX_ID to use the query cache. 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 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. @return TRUE if permitted, FALSE if not; note that the value FALSE does not mean we should invalidate the query cache: invalidation is called explicitly */ static my_bool innobase_query_caching_of_table_permitted( /*======================================*/ 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 NUL, and the table name */ uint full_name_len, /*!< in: length of the full name, i.e. len(dbname) + len(tablename) + 1 */ ulonglong *unused) /*!< unused for this engine */ { ibool is_autocommit; trx_t* trx; char norm_name[1000]; ut_a(full_name_len < 999); trx = check_trx_exists(thd); if (trx->isolation_level == TRX_ISO_SERIALIZABLE) { /* In the SERIALIZABLE mode we add LOCK IN SHARE MODE to every plain SELECT if AUTOCOMMIT is not on. */ return((my_bool)FALSE); } if (trx->has_search_latch) { sql_print_error("The calling thread is holding the adaptive " "search, latch though calling " "innobase_query_caching_of_table_permitted."); mutex_enter(&kernel_mutex); trx_print(stderr, trx, 1024); mutex_exit(&kernel_mutex); } innobase_release_stat_resources(trx); if (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) { is_autocommit = TRUE; } else { is_autocommit = FALSE; } 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. */ return((my_bool)TRUE); } /* 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__ innobase_casedn_str(norm_name); #endif /* The call of row_search_.. will start a new transaction if it is not yet started */ if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0) { innobase_register_trx_and_stmt(innodb_hton_ptr, thd); trx->active_flag |= TRX_ACTIVE_IN_MYSQL; } if (row_search_check_if_query_cache_permitted(trx, norm_name)) { /* printf("Query cache for %s permitted\n", norm_name); */ return((my_bool)TRUE); } /* printf("Query cache for %s NOT permitted\n", norm_name); */ return((my_bool)FALSE); } /*****************************************************************//** Invalidates the MySQL query cache for the table. */ extern "C" UNIV_INTERN void innobase_invalidate_query_cache( /*============================*/ trx_t* trx, /*!< in: transaction which modifies the table */ const char* full_name, /*!< in: concatenation of database name, null char NUL, table name, null char NUL; NOTE that in Windows this is always in LOWER CASE! */ ulint full_name_len) /*!< in: full name length where also the null chars count */ { /* 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. */ /* Argument TRUE below means we are using transactions */ #ifdef HAVE_QUERY_CACHE mysql_query_cache_invalidate4((THD*) trx->mysql_thd, full_name, (uint32) full_name_len, TRUE); #endif } /*****************************************************************//** Convert an SQL identifier to the MySQL system_charset_info (UTF-8) and quote it if needed. @return pointer to the end of buf */ static char* innobase_convert_identifier( /*========================*/ char* buf, /*!< out: buffer for converted identifier */ ulint buflen, /*!< in: length of buf, in bytes */ const char* id, /*!< in: identifier to convert */ ulint idlen, /*!< in: length of id, in bytes */ void* thd, /*!< in: MySQL connection thread, or NULL */ ibool file_id)/*!< in: TRUE=id is a table or database name; FALSE=id is an UTF-8 string */ { char nz[NAME_LEN + 1]; #if MYSQL_VERSION_ID >= 50141 char nz2[NAME_LEN + 1 + EXPLAIN_FILENAME_MAX_EXTRA_LENGTH]; #else /* MYSQL_VERSION_ID >= 50141 */ char nz2[NAME_LEN + 1 + sizeof srv_mysql50_table_name_prefix]; #endif /* MYSQL_VERSION_ID >= 50141 */ const char* s = id; int q; if (file_id) { /* Decode the table name. The MySQL function expects a NUL-terminated string. The input and output strings buffers must not be shared. */ if (UNIV_UNLIKELY(idlen > (sizeof nz) - 1)) { idlen = (sizeof nz) - 1; } memcpy(nz, id, idlen); nz[idlen] = 0; s = nz2; #if MYSQL_VERSION_ID >= 50141 idlen = explain_filename((THD*) thd, nz, nz2, sizeof nz2, EXPLAIN_PARTITIONS_AS_COMMENT); goto no_quote; #else /* MYSQL_VERSION_ID >= 50141 */ idlen = filename_to_tablename(nz, nz2, sizeof nz2); #endif /* MYSQL_VERSION_ID >= 50141 */ } /* See if the identifier needs to be quoted. */ if (UNIV_UNLIKELY(!thd)) { q = '"'; } else { q = get_quote_char_for_identifier((THD*) thd, s, (int) idlen); } if (q == EOF) { #if MYSQL_VERSION_ID >= 50141 no_quote: #endif /* MYSQL_VERSION_ID >= 50141 */ if (UNIV_UNLIKELY(idlen > buflen)) { idlen = buflen; } memcpy(buf, s, idlen); return(buf + idlen); } /* Quote the identifier. */ if (buflen < 2) { return(buf); } *buf++ = q; buflen--; for (; idlen; idlen--) { int c = *s++; if (UNIV_UNLIKELY(c == q)) { if (UNIV_UNLIKELY(buflen < 3)) { break; } *buf++ = c; *buf++ = c; buflen -= 2; } else { if (UNIV_UNLIKELY(buflen < 2)) { break; } *buf++ = c; buflen--; } } *buf++ = q; return(buf); } /*****************************************************************//** Convert a table or index name to the MySQL system_charset_info (UTF-8) and quote it if needed. @return pointer to the end of buf */ extern "C" UNIV_INTERN char* innobase_convert_name( /*==================*/ char* buf, /*!< out: buffer for converted identifier */ ulint buflen, /*!< in: length of buf, in bytes */ const char* id, /*!< in: identifier to convert */ ulint idlen, /*!< in: length of id, in bytes */ void* thd, /*!< in: MySQL connection thread, or NULL */ ibool table_id)/*!< in: TRUE=id is a table or database name; FALSE=id is an index name */ { char* s = buf; const char* bufend = buf + buflen; if (table_id) { const char* slash = (const char*) memchr(id, '/', idlen); if (!slash) { goto no_db_name; } /* Print the database name and table name separately. */ s = innobase_convert_identifier(s, bufend - s, id, slash - id, thd, TRUE); if (UNIV_LIKELY(s < bufend)) { *s++ = '.'; s = innobase_convert_identifier(s, bufend - s, slash + 1, idlen - (slash - id) - 1, thd, TRUE); } } else if (UNIV_UNLIKELY(*id == TEMP_INDEX_PREFIX)) { /* Temporary index name (smart ALTER TABLE) */ const char temp_index_suffix[]= "--temporary--"; s = innobase_convert_identifier(buf, buflen, id + 1, idlen - 1, thd, FALSE); if (s - buf + (sizeof temp_index_suffix - 1) < buflen) { memcpy(s, temp_index_suffix, sizeof temp_index_suffix - 1); s += sizeof temp_index_suffix - 1; } } else { no_db_name: s = innobase_convert_identifier(buf, buflen, id, idlen, thd, table_id); } return(s); } /**********************************************************************//** Determines if the currently running transaction has been interrupted. @return TRUE if interrupted */ extern "C" UNIV_INTERN ibool trx_is_interrupted( /*===============*/ trx_t* trx) /*!< in: transaction */ { return(trx && trx->mysql_thd && thd_killed((THD*) trx->mysql_thd)); } /**********************************************************************//** Determines if the currently running transaction is in strict mode. @return TRUE if strict */ extern "C" UNIV_INTERN ibool trx_is_strict( /*==========*/ trx_t* trx) /*!< in: transaction */ { return(trx && trx->mysql_thd && THDVAR((THD*) trx->mysql_thd, strict_mode)); } /**************************************************************//** Resets some fields of a prebuilt struct. The template is used in fast retrieval of just those column values MySQL needs in its processing. */ static void reset_template( /*===========*/ row_prebuilt_t* prebuilt) /*!< in/out: prebuilt struct */ { prebuilt->keep_other_fields_on_keyread = 0; prebuilt->read_just_key = 0; } /*****************************************************************//** 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, fetch next etc. This function inits the necessary things even after a transaction commit. */ UNIV_INTERN void ha_innobase::init_table_handle_for_HANDLER(void) /*============================================*/ { /* If current thd does not yet have a trx struct, create one. If the current handle does not yet have a prebuilt struct, create one. Update the trx pointers in the prebuilt struct. Normally this operation is done in external_lock. */ update_thd(ha_thd()); /* Initialize the prebuilt struct much like it would be inited in external_lock */ innobase_release_stat_resources(prebuilt->trx); /* If the transaction is not started yet, start it */ trx_start_if_not_started(prebuilt->trx); /* Assign a read view if the transaction does not have it yet */ trx_assign_read_view(prebuilt->trx); /* Set the MySQL flag to mark that there is an active transaction */ if ((prebuilt->trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0) { innobase_register_trx_and_stmt(ht, user_thd); prebuilt->trx->active_flag |= TRX_ACTIVE_IN_MYSQL; } /* We did the necessary inits in this function, no need to repeat them in row_search_for_mysql */ prebuilt->sql_stat_start = FALSE; /* We let HANDLER always to do the reads as consistent reads, even if the trx isolation level would have been specified as SERIALIZABLE */ prebuilt->select_lock_type = LOCK_NONE; prebuilt->stored_select_lock_type = LOCK_NONE; /* Always fetch all columns in the index record */ prebuilt->hint_need_to_fetch_extra_cols = ROW_RETRIEVE_ALL_COLS; /* We want always to fetch all columns in the whole row? Or do we???? */ prebuilt->used_in_HANDLER = TRUE; reset_template(prebuilt); } /*********************************************************************//** Opens an InnoDB database. @return 0 on success, error code on failure */ static int innobase_init( /*==========*/ void *p) /*!< in: InnoDB handlerton */ { static char current_dir[3]; /*!< Set if using current lib */ int err; bool ret; char *default_path; uint format_id; DBUG_ENTER("innobase_init"); handlerton *innobase_hton= (handlerton *)p; innodb_hton_ptr = innobase_hton; innobase_hton->state = SHOW_OPTION_YES; 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->prepare_ordered=NULL; innobase_hton->commit_ordered=innobase_commit_ordered; 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; innobase_hton->alter_table_flags = innobase_alter_table_flags; ut_a(DATA_MYSQL_TRUE_VARCHAR == (ulint)MYSQL_TYPE_VARCHAR); #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 */ /* 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"); goto error; } if (innobase_log_file_size > UINT_MAX32) { sql_print_error( "innobase_log_file_size can't be over 4GB" " on 32-bit systems"); goto error; } } os_innodb_umask = (ulint)my_umask; /* 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. */ if (mysqld_embedded) { default_path = mysql_real_data_home; fil_path_to_mysql_datadir = mysql_real_data_home; } else { /* It's better to use current lib, to keep paths short */ current_dir[0] = FN_CURLIB; current_dir[1] = FN_LIBCHAR; current_dir[2] = 0; default_path = current_dir; } ut_a(default_path); if (specialflag & SPECIAL_NO_PRIOR) { srv_set_thread_priorities = FALSE; } else { srv_set_thread_priorities = TRUE; srv_query_thread_priority = QUERY_PRIOR; } /* Set InnoDB initialization parameters according to the values read from MySQL .cnf file */ /*--------------- Data files -------------------------*/ /* The default dir for data files is the datadir of MySQL */ srv_data_home = (innobase_data_home_dir ? innobase_data_home_dir : default_path); /* Set default InnoDB data file size to 10 MB and let it be auto-extending. Thus users can use InnoDB in >= 4.0 without having to specify any startup options. */ if (!innobase_data_file_path) { innobase_data_file_path = (char*) "ibdata1:10M:autoextend"; } /* Since InnoDB edits the argument in the next call, we make another copy of it: */ internal_innobase_data_file_path = my_strdup(innobase_data_file_path, MYF(MY_FAE)); ret = (bool) srv_parse_data_file_paths_and_sizes( internal_innobase_data_file_path); if (ret == FALSE) { sql_print_error( "InnoDB: syntax error in innodb_data_file_path"); mem_free_and_error: srv_free_paths_and_sizes(); my_free(internal_innobase_data_file_path, MYF(MY_ALLOW_ZERO_PTR)); goto error; } /* -------------- Log files ---------------------------*/ /* The default dir for log files is the datadir of MySQL */ if (!innobase_log_group_home_dir) { innobase_log_group_home_dir = default_path; } #ifdef UNIV_LOG_ARCHIVE /* 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; #endif /* UNIG_LOG_ARCHIVE */ ret = (bool) srv_parse_log_group_home_dirs(innobase_log_group_home_dir); if (ret == FALSE || innobase_mirrored_log_groups != 1) { sql_print_error("syntax error in innodb_log_group_home_dir, or a " "wrong number of mirrored log groups"); goto mem_free_and_error; } /* Validate the file format by animal name */ if (innobase_file_format_name != NULL) { format_id = innobase_file_format_name_lookup( innobase_file_format_name); if (format_id > DICT_TF_FORMAT_MAX) { sql_print_error("InnoDB: wrong innodb_file_format."); goto mem_free_and_error; } } else { /* Set it to the default file format id. Though this should never happen. */ format_id = 0; } srv_file_format = format_id; /* Given the type of innobase_file_format_name we have little choice but to cast away the constness from the returned name. innobase_file_format_name is used in the MySQL set variable interface and so can't be const. */ innobase_file_format_name = (char*) trx_sys_file_format_id_to_name(format_id); /* Process innobase_file_format_check variable */ ut_a(innobase_file_format_check != NULL); /* As a side effect it will set srv_check_file_format_at_startup on valid input. First we check for "on"/"off". */ if (!innobase_file_format_check_on_off(innobase_file_format_check)) { /* Did the user specify a format name that we support ? As a side effect it will update the variable srv_check_file_format_at_startup */ if (innobase_file_format_validate_and_set( innobase_file_format_check) < 0) { sql_print_error("InnoDB: invalid " "innodb_file_format_check value: " "should be either 'on' or 'off' or " "any value up to %s or its " "equivalent numeric id", trx_sys_file_format_id_to_name( DICT_TF_FORMAT_MAX)); goto mem_free_and_error; } } if (innobase_change_buffering) { ulint use; for (use = 0; use < UT_ARR_SIZE(innobase_change_buffering_values); use++) { if (!innobase_strcasecmp( innobase_change_buffering, innobase_change_buffering_values[use])) { ibuf_use = (ibuf_use_t) use; goto innobase_change_buffering_inited_ok; } } sql_print_error("InnoDB: invalid value " "innodb_change_buffering=%s", innobase_change_buffering); goto mem_free_and_error; } innobase_change_buffering_inited_ok: ut_a((ulint) ibuf_use < UT_ARR_SIZE(innobase_change_buffering_values)); innobase_change_buffering = (char*) innobase_change_buffering_values[ibuf_use]; /* --------------------------------------------------*/ srv_file_flush_method_str = innobase_file_flush_method; srv_n_log_groups = (ulint) innobase_mirrored_log_groups; srv_n_log_files = (ulint) innobase_log_files_in_group; srv_log_file_size = (ulint) innobase_log_file_size; #ifdef UNIV_LOG_ARCHIVE srv_log_archive_on = (ulint) innobase_log_archive; #endif /* UNIV_LOG_ARCHIVE */ srv_log_buffer_size = (ulint) innobase_log_buffer_size; srv_buf_pool_size = (ulint) innobase_buffer_pool_size; srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size; srv_n_file_io_threads = (ulint) innobase_file_io_threads; srv_n_read_io_threads = (ulint) innobase_read_io_threads; srv_n_write_io_threads = (ulint) innobase_write_io_threads; srv_force_recovery = (ulint) innobase_force_recovery; srv_use_doublewrite_buf = (ibool) innobase_use_doublewrite; srv_use_checksums = (ibool) innobase_use_checksums; #ifdef HAVE_LARGE_PAGES if ((os_use_large_pages = (ibool) my_use_large_pages)) os_large_page_size = (ulint) opt_large_page_size; #endif row_rollback_on_timeout = (ibool) innobase_rollback_on_timeout; srv_locks_unsafe_for_binlog = (ibool) innobase_locks_unsafe_for_binlog; srv_max_n_open_files = (ulint) innobase_open_files; srv_innodb_status = (ibool) innobase_create_status_file; srv_print_verbose_log = mysqld_embedded ? 0 : 1; /* Store the default charset-collation number of this MySQL installation */ data_mysql_default_charset_coll = (ulint)default_charset_info->number; ut_a(DATA_MYSQL_LATIN1_SWEDISH_CHARSET_COLL == my_charset_latin1.number); ut_a(DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number); /* 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. */ ut_a(0 == strcmp(my_charset_latin1.name, "latin1_swedish_ci")); srv_latin1_ordering = my_charset_latin1.sort_order; innobase_old_blocks_pct = buf_LRU_old_ratio_update( innobase_old_blocks_pct, FALSE); innobase_commit_concurrency_init_default(); /* Since we in this module access directly the fields of a trx struct, and due to different headers and flags it might happen that mutex_t has a different size in this module and in InnoDB modules, we check at run time that the size is the same in these compilation modules. */ err = innobase_start_or_create_for_mysql(); if (err != DB_SUCCESS) { goto mem_free_and_error; } innobase_open_tables = hash_create(200); pthread_mutex_init(&innobase_share_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); innodb_inited= 1; #ifdef MYSQL_DYNAMIC_PLUGIN if (innobase_hton != p) { innobase_hton = reinterpret_cast(p); *innobase_hton = *innodb_hton_ptr; } #endif /* MYSQL_DYNAMIC_PLUGIN */ /* Get the current high water mark format. */ innobase_file_format_check = (char*) trx_sys_file_format_max_get(); btr_search_fully_disabled = (!btr_search_enabled); DBUG_RETURN(FALSE); error: DBUG_RETURN(TRUE); } /*******************************************************************//** Closes an InnoDB database. @return TRUE if error */ static int innobase_end( /*=========*/ handlerton* hton, /*!< in/out: InnoDB handlerton */ ha_panic_function type __attribute__((unused))) /*!< in: ha_panic() parameter */ { int err= 0; DBUG_ENTER("innobase_end"); DBUG_ASSERT(hton == innodb_hton_ptr); #ifdef __NETWARE__ /* some special cleanup for NetWare */ if (nw_panic) { set_panic_flag_for_netware(); } #endif if (innodb_inited) { srv_fast_shutdown = (ulint) innobase_fast_shutdown; innodb_inited = 0; hash_table_free(innobase_open_tables); innobase_open_tables = NULL; if (innobase_shutdown_for_mysql() != DB_SUCCESS) { err = 1; } srv_free_paths_and_sizes(); my_free(internal_innobase_data_file_path, MYF(MY_ALLOW_ZERO_PTR)); pthread_mutex_destroy(&innobase_share_mutex); pthread_mutex_destroy(&commit_threads_m); pthread_mutex_destroy(&commit_cond_m); pthread_cond_destroy(&commit_cond); } DBUG_RETURN(err); } /****************************************************************//** 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. @return TRUE if error */ static bool innobase_flush_logs( /*================*/ handlerton* hton) /*!< in/out: InnoDB handlerton */ { bool result = 0; DBUG_ENTER("innobase_flush_logs"); DBUG_ASSERT(hton == innodb_hton_ptr); log_buffer_flush_to_disk(); DBUG_RETURN(result); } /****************************************************************//** Return alter table flags supported in an InnoDB database. */ static uint innobase_alter_table_flags( /*=======================*/ uint flags) { return(HA_ONLINE_ADD_INDEX_NO_WRITES | HA_ONLINE_DROP_INDEX_NO_WRITES | HA_ONLINE_ADD_UNIQUE_INDEX_NO_WRITES | HA_ONLINE_DROP_UNIQUE_INDEX_NO_WRITES | HA_ONLINE_ADD_PK_INDEX_NO_WRITES); } /*****************************************************************//** Commits a transaction in an InnoDB database. */ static void innobase_commit_low( /*================*/ trx_t* trx) /*!< in: transaction handle */ { if (trx->conc_state == TRX_NOT_STARTED) { return; } trx_commit_for_mysql(trx); } /*****************************************************************//** 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. @return 0 */ static int innobase_start_trx_and_assign_read_view( /*====================================*/ handlerton *hton, /*!< in: Innodb handlerton */ THD* thd) /*!< in: MySQL thread handle of the user for whom the transaction should be committed */ { trx_t* trx; DBUG_ENTER("innobase_start_trx_and_assign_read_view"); DBUG_ASSERT(hton == innodb_hton_ptr); /* 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(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 */ if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0) { innobase_register_trx_and_stmt(hton, thd); trx->active_flag |= TRX_ACTIVE_IN_MYSQL; } DBUG_RETURN(0); } static void innobase_commit_ordered_2( /*============*/ trx_t* trx, /*!< in: Innodb transaction */ THD* thd) /*!< in: MySQL thread handle */ { ulonglong tmp_pos; DBUG_ENTER("innobase_commit_ordered"); /* We need current binlog position for ibbackup to work. Note, the position is current because commit_ordered is guaranteed to be called in same sequenece as writing to binlog. */ retry: if (innobase_commit_concurrency > 0) { pthread_mutex_lock(&commit_cond_m); commit_threads++; if (commit_threads > innobase_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); } } mysql_bin_log_commit_pos(thd, &tmp_pos, &(trx->mysql_log_file_name)); trx->mysql_log_offset = (ib_int64_t) tmp_pos; /* Don't do write + flush right now. For group commit to work we want to do the flush in the innobase_commit() method, which runs without holding any locks. */ trx->flush_log_later = TRUE; innobase_commit_low(trx); trx->flush_log_later = FALSE; if (innobase_commit_concurrency > 0) { pthread_mutex_lock(&commit_cond_m); commit_threads--; pthread_cond_signal(&commit_cond); pthread_mutex_unlock(&commit_cond_m); } DBUG_VOID_RETURN; } /*****************************************************************//** Perform the first, fast part of InnoDB commit. Doing it in this call ensures that we get the same commit order here as in binlog and any other participating transactional storage engines. Note that we want to do as little as really needed here, as we run under a global mutex. The expensive fsync() is done later, in innobase_commit(), without a lock so group commit can take place. Note also that this method can be called from a different thread than the one handling the rest of the transaction. */ static void innobase_commit_ordered( /*============*/ handlerton *hton, /*!< in: Innodb handlerton */ THD* thd, /*!< in: MySQL thread handle of the user for whom the transaction should be committed */ bool all) /*!< in: TRUE - commit transaction FALSE - the current SQL statement ended */ { trx_t* trx; DBUG_ENTER("innobase_commit_ordered"); DBUG_ASSERT(hton == innodb_hton_ptr); trx = check_trx_exists(thd); /* Since we will reserve the kernel mutex, we must not be holding the search system latch, or we will disobey the latching order. But we already released it in innobase_xa_prepare() (if not before), so just have an assert here.*/ ut_ad(!trx->has_search_latch); if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0 && trx->conc_state != TRX_NOT_STARTED) { /* We cannot throw error here; instead we will catch this error again in innobase_commit() and report it from there. */ DBUG_VOID_RETURN; } /* commit_ordered is only called when committing the whole transaction (or an SQL statement when autocommit is on). */ DBUG_ASSERT(all || (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))); innobase_commit_ordered_2(trx, thd); trx->active_flag |= TRX_ACTIVE_COMMIT_ORDERED; DBUG_VOID_RETURN; } /*****************************************************************//** Commits a transaction in an InnoDB database or marks an SQL statement ended. @return 0 */ static int innobase_commit( /*============*/ handlerton *hton, /*!< in: Innodb handlerton */ THD* thd, /*!< in: MySQL thread handle of the user for whom the transaction should be committed */ bool all) /*!< in: TRUE - commit transaction FALSE - the current SQL statement ended */ { trx_t* trx; DBUG_ENTER("innobase_commit"); DBUG_ASSERT(hton == innodb_hton_ptr); DBUG_PRINT("trans", ("ending transaction")); trx = check_trx_exists(thd); /* Since we will reserve the kernel mutex, we have to release the search system latch first to obey the latching order. */ if (trx->has_search_latch && (trx->active_flag & TRX_ACTIVE_COMMIT_ORDERED) == 0) { trx_search_latch_release_if_reserved(trx); } /* The flag TRX_ACTIVE_IN_MYSQL in trx->active_flag is set in 1. ::external_lock(), 2. ::start_stmt(), 3. innobase_query_caching_of_table_permitted(), 4. innobase_savepoint(), 5. ::init_table_handle_for_HANDLER(), 6. innobase_start_trx_and_assign_read_view(), 7. ::transactional_table_lock() and it is only cleared in a commit or a rollback. If it is unset 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. */ if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0 && trx->conc_state != TRX_NOT_STARTED) { sql_print_error("trx->active_flag & TRX_ACTIVE_IN_MYSQL== 0," " but trx->conc_state != TRX_NOT_STARTED"); } if (all || (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) { /* Run the fast part of commit if we did not already. */ if ((trx->active_flag & TRX_ACTIVE_COMMIT_ORDERED) == 0) { innobase_commit_ordered_2(trx, thd); } /* We were instructed to commit the whole transaction, or this is an SQL statement end and autocommit is on */ /* We did the first part already in innobase_commit_ordered(), Now finish by doing a write + flush of logs. */ trx_commit_complete_for_mysql(trx); trx->active_flag = 0; } else { /* We just mark the SQL statement ended and do not do a transaction commit */ /* If we had reserved the auto-inc lock for some table in this SQL statement we release it now */ 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); } trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */ if (trx->declared_to_be_inside_innodb) { /* Release our possible ticket in the FIFO */ srv_conc_force_exit_innodb(trx); } /* Tell the InnoDB server that there might be work for utility threads: */ srv_active_wake_master_thread(); DBUG_RETURN(0); } /*****************************************************************//** Rolls back a transaction or the latest SQL statement. @return 0 or error number */ static int innobase_rollback( /*==============*/ handlerton *hton, /*!< in: Innodb handlerton */ THD* thd, /*!< in: handle to the MySQL thread of the user whose transaction should be rolled back */ bool all) /*!< in: TRUE - commit transaction FALSE - the current SQL statement ended */ { int error = 0; trx_t* trx; DBUG_ENTER("innobase_rollback"); DBUG_ASSERT(hton == innodb_hton_ptr); DBUG_PRINT("trans", ("aborting transaction")); trx = check_trx_exists(thd); /* 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); trx->n_autoinc_rows = 0; /* Reset the number AUTO-INC rows required */ /* 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 */ row_unlock_table_autoinc_for_mysql(trx); if (all || !thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) { error = trx_rollback_for_mysql(trx); trx->active_flag = 0; } else { error = trx_rollback_last_sql_stat_for_mysql(trx); } DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL)); } /*****************************************************************//** Rolls back a transaction @return 0 or error number */ static int innobase_rollback_trx( /*==================*/ trx_t* trx) /*!< in: transaction */ { int error = 0; DBUG_ENTER("innobase_rollback_trx"); DBUG_PRINT("trans", ("aborting transaction")); /* Release a possible FIFO ticket and search latch. Since we will reserve the kernel mutex, we have to release the search system latch first to obey the latching order. */ innobase_release_stat_resources(trx); /* If 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 */ row_unlock_table_autoinc_for_mysql(trx); error = trx_rollback_for_mysql(trx); DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL)); } /*****************************************************************//** Rolls back a transaction to a savepoint. @return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the given name */ static int innobase_rollback_to_savepoint( /*===========================*/ handlerton *hton, /*!< in: Innodb handlerton */ THD* thd, /*!< in: handle to the MySQL thread of the user whose transaction should be rolled back */ void* savepoint) /*!< in: savepoint data */ { ib_int64_t mysql_binlog_cache_pos; int error = 0; trx_t* trx; char name[64]; DBUG_ENTER("innobase_rollback_to_savepoint"); DBUG_ASSERT(hton == innodb_hton_ptr); trx = check_trx_exists(thd); /* 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); /* TODO: use provided savepoint data area to store savepoint data */ longlong2str((ulint)savepoint, name, 36, 1); error = (int) trx_rollback_to_savepoint_for_mysql(trx, name, &mysql_binlog_cache_pos); DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL)); } /*****************************************************************//** Release transaction savepoint name. @return 0 if success, HA_ERR_NO_SAVEPOINT if no savepoint with the given name */ static int innobase_release_savepoint( /*=======================*/ handlerton* hton, /*!< in: handlerton for Innodb */ THD* thd, /*!< in: handle to the MySQL thread of the user whose transaction should be rolled back */ void* savepoint) /*!< in: savepoint data */ { int error = 0; trx_t* trx; char name[64]; DBUG_ENTER("innobase_release_savepoint"); DBUG_ASSERT(hton == innodb_hton_ptr); trx = check_trx_exists(thd); /* TODO: use provided savepoint data area to store savepoint data */ longlong2str((ulint)savepoint, name, 36, 1); error = (int) trx_release_savepoint_for_mysql(trx, name); DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL)); } /*****************************************************************//** Sets a transaction savepoint. @return always 0, that is, always succeeds */ static int innobase_savepoint( /*===============*/ handlerton* hton, /*!< in: handle to the Innodb handlerton */ THD* thd, /*!< in: handle to the MySQL thread */ void* savepoint) /*!< in: savepoint data */ { int error = 0; trx_t* trx; DBUG_ENTER("innobase_savepoint"); DBUG_ASSERT(hton == innodb_hton_ptr); /* 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. */ #ifdef MYSQL_SERVER /* plugins cannot access thd->in_sub_stmt */ DBUG_ASSERT(thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) || thd->in_sub_stmt); #endif /* MYSQL_SERVER */ trx = check_trx_exists(thd); /* 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); /* cannot happen outside of transaction */ DBUG_ASSERT(trx->active_flag & TRX_ACTIVE_IN_MYSQL); /* TODO: use provided savepoint data area to store savepoint data */ char name[64]; longlong2str((ulint)savepoint,name,36,1); error = (int) trx_savepoint_for_mysql(trx, name, (ib_int64_t)0); DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL)); } /*****************************************************************//** Frees a possible InnoDB trx object associated with the current THD. @return 0 or error number */ static int innobase_close_connection( /*======================*/ handlerton* hton, /*!< in: innobase handlerton */ THD* thd) /*!< in: handle to the MySQL thread of the user whose resources should be free'd */ { trx_t* trx; DBUG_ENTER("innobase_close_connection"); DBUG_ASSERT(hton == innodb_hton_ptr); trx = thd_to_trx(thd); ut_a(trx); if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0 && trx->conc_state != TRX_NOT_STARTED) { sql_print_error("trx->active_flag & TRX_ACTIVE_IN_MYSQL == 0," " but trx->conc_state != TRX_NOT_STARTED"); } if (trx->conc_state != TRX_NOT_STARTED && global_system_variables.log_warnings) { sql_print_warning( "MySQL is closing a connection that has an active " "InnoDB transaction. %lu row modifications will " "roll back.", (ulong) trx->undo_no.low); } innobase_rollback_trx(trx); thr_local_free(trx->mysql_thread_id); trx_free_for_mysql(trx); DBUG_RETURN(0); } /*************************************************************************//** ** InnoDB database tables *****************************************************************************/ /****************************************************************//** Get the record format from the data dictionary. @return one of ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT, ROW_TYPE_COMPRESSED, ROW_TYPE_DYNAMIC */ UNIV_INTERN enum row_type ha_innobase::get_row_type() const /*=============================*/ { if (prebuilt && prebuilt->table) { const ulint flags = prebuilt->table->flags; if (UNIV_UNLIKELY(!flags)) { return(ROW_TYPE_REDUNDANT); } ut_ad(flags & DICT_TF_COMPACT); switch (flags & DICT_TF_FORMAT_MASK) { case DICT_TF_FORMAT_51 << DICT_TF_FORMAT_SHIFT: return(ROW_TYPE_COMPACT); case DICT_TF_FORMAT_ZIP << DICT_TF_FORMAT_SHIFT: if (flags & DICT_TF_ZSSIZE_MASK) { return(ROW_TYPE_COMPRESSED); } else { return(ROW_TYPE_DYNAMIC); } #if DICT_TF_FORMAT_ZIP != DICT_TF_FORMAT_MAX # error "DICT_TF_FORMAT_ZIP != DICT_TF_FORMAT_MAX" #endif } } ut_ad(0); return(ROW_TYPE_NOT_USED); } /****************************************************************//** Get the table flags to use for the statement. @return table flags */ UNIV_INTERN handler::Table_flags ha_innobase::table_flags() const /*============================*/ { /* Need to use tx_isolation here since table flags is (also) called before prebuilt is inited. */ ulong const tx_isolation = thd_tx_isolation(ha_thd()); if (tx_isolation <= ISO_READ_COMMITTED) return int_table_flags; return int_table_flags | HA_BINLOG_STMT_CAPABLE; } /****************************************************************//** Gives the file extension of an InnoDB single-table tablespace. */ static const char* ha_innobase_exts[] = { ".ibd", NullS }; /****************************************************************//** Returns the table type (storage engine name). @return table type */ UNIV_INTERN const char* ha_innobase::table_type() const /*===========================*/ { return(innobase_hton_name); } /****************************************************************//** Returns the index type. */ UNIV_INTERN const char* ha_innobase::index_type( /*====================*/ uint) /*!< out: index type */ { return("BTREE"); } /****************************************************************//** Returns the table file name extension. @return file extension string */ UNIV_INTERN const char** ha_innobase::bas_ext() const /*========================*/ { return(ha_innobase_exts); } /****************************************************************//** Returns the operations supported for indexes. @return flags of supported operations */ UNIV_INTERN ulong ha_innobase::index_flags( /*=====================*/ uint index, uint, bool) const { ulong extra_flag= 0; if (table && index == table->s->primary_key) extra_flag= HA_CLUSTERED_INDEX; return(HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | extra_flag | HA_READ_RANGE | HA_KEYREAD_ONLY); } /****************************************************************//** Returns the maximum number of keys. @return MAX_KEY */ UNIV_INTERN uint ha_innobase::max_supported_keys() const /*===================================*/ { return(MAX_KEY); } /****************************************************************//** Returns the maximum key length. @return maximum supported key length, in bytes */ UNIV_INTERN uint ha_innobase::max_supported_key_length() const /*=========================================*/ { /* An InnoDB page must store >= 2 keys; a secondary key record must also contain the primary key value: max key length is therefore set to slightly less than 1 / 4 of page size which is 16 kB; but currently MySQL does not work with keys whose size is > MAX_KEY_LENGTH */ return(3500); } /****************************************************************//** Returns the key map of keys that are usable for scanning. @return key_map_full */ UNIV_INTERN const key_map* ha_innobase::keys_to_use_for_scanning() { return(&key_map_full); } /****************************************************************//** Determines if table caching is supported. @return HA_CACHE_TBL_ASKTRANSACT */ UNIV_INTERN uint8 ha_innobase::table_cache_type() { return(HA_CACHE_TBL_ASKTRANSACT); } /****************************************************************//** Determines if the primary key is clustered index. @return true */ UNIV_INTERN bool ha_innobase::primary_key_is_clustered() { return(true); } /*****************************************************************//** Normalizes a table name string. A normalized name consists of the database name catenated to '/' and table name. An example: test/mytable. On Windows normalization puts both the database name and the table name always to lower case. */ 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 */ ptr = strend(name)-1; while (ptr >= name && *ptr != '\\' && *ptr != '/') { ptr--; } name_ptr = ptr + 1; DBUG_ASSERT(ptr > name); ptr--; 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] = '/'; #ifdef __WIN__ innobase_casedn_str(norm_name); #endif } /********************************************************************//** Get the upper limit of the MySQL integral and floating-point type. @return maximum allowed value for the field */ static ulonglong innobase_get_int_col_max_value( /*===========================*/ const Field* field) /*!< in: MySQL field */ { ulonglong max_value = 0; switch(field->key_type()) { /* TINY */ case HA_KEYTYPE_BINARY: max_value = 0xFFULL; break; case HA_KEYTYPE_INT8: max_value = 0x7FULL; break; /* SHORT */ case HA_KEYTYPE_USHORT_INT: max_value = 0xFFFFULL; break; case HA_KEYTYPE_SHORT_INT: max_value = 0x7FFFULL; break; /* MEDIUM */ case HA_KEYTYPE_UINT24: max_value = 0xFFFFFFULL; break; case HA_KEYTYPE_INT24: max_value = 0x7FFFFFULL; break; /* LONG */ case HA_KEYTYPE_ULONG_INT: max_value = 0xFFFFFFFFULL; break; case HA_KEYTYPE_LONG_INT: max_value = 0x7FFFFFFFULL; break; /* BIG */ case HA_KEYTYPE_ULONGLONG: max_value = 0xFFFFFFFFFFFFFFFFULL; break; case HA_KEYTYPE_LONGLONG: max_value = 0x7FFFFFFFFFFFFFFFULL; break; case HA_KEYTYPE_FLOAT: /* We use the maximum as per IEEE754-2008 standard, 2^24 */ max_value = 0x1000000ULL; break; case HA_KEYTYPE_DOUBLE: /* We use the maximum as per IEEE754-2008 standard, 2^53 */ max_value = 0x20000000000000ULL; break; default: ut_error; } return(max_value); } /*******************************************************************//** This function checks whether the index column information is consistent between KEY info from mysql and that from innodb index. @return TRUE if all column types match. */ static ibool innobase_match_index_columns( /*=========================*/ const KEY* key_info, /*!< in: Index info from mysql */ const dict_index_t* index_info) /*!< in: Index info from Innodb */ { const KEY_PART_INFO* key_part; const KEY_PART_INFO* key_end; const dict_field_t* innodb_idx_fld; const dict_field_t* innodb_idx_fld_end; DBUG_ENTER("innobase_match_index_columns"); /* Check whether user defined index column count matches */ if (key_info->key_parts != index_info->n_user_defined_cols) { DBUG_RETURN(FALSE); } key_part = key_info->key_part; key_end = key_part + key_info->key_parts; innodb_idx_fld = index_info->fields; innodb_idx_fld_end = index_info->fields + index_info->n_fields; /* Check each index column's datatype. We do not check column name because there exists case that index column name got modified in mysql but such change does not propagate to InnoDB. One hidden assumption here is that the index column sequences are matched up between those in mysql and Innodb. */ for (; key_part != key_end; ++key_part) { ulint col_type; ibool is_unsigned; ulint mtype = innodb_idx_fld->col->mtype; /* Need to translate to InnoDB column type before comparison. */ col_type = get_innobase_type_from_mysql_type(&is_unsigned, key_part->field); /* Ignore Innodb specific system columns. */ while (mtype == DATA_SYS) { innodb_idx_fld++; if (innodb_idx_fld >= innodb_idx_fld_end) { DBUG_RETURN(FALSE); } } if (col_type != mtype) { /* Column Type mismatches */ DBUG_RETURN(FALSE); } innodb_idx_fld++; } DBUG_RETURN(TRUE); } /*******************************************************************//** This function builds a translation table in INNOBASE_SHARE structure for fast index location with mysql array number from its table->key_info structure. This also provides the necessary translation between the key order in mysql key_info and Innodb ib_table->indexes if they are not fully matched with each other. Note we do not have any mutex protecting the translation table building based on the assumption that there is no concurrent index creation/drop and DMLs that requires index lookup. All table handle will be closed before the index creation/drop. @return TRUE if index translation table built successfully */ static ibool innobase_build_index_translation( /*=============================*/ const TABLE* table, /*!< in: table in MySQL data dictionary */ dict_table_t* ib_table, /*!< in: table in Innodb data dictionary */ INNOBASE_SHARE* share) /*!< in/out: share structure where index translation table will be constructed in. */ { ulint mysql_num_index; ulint ib_num_index; dict_index_t** index_mapping; ibool ret = TRUE; DBUG_ENTER("innobase_build_index_translation"); mysql_num_index = table->s->keys; ib_num_index = UT_LIST_GET_LEN(ib_table->indexes); index_mapping = share->idx_trans_tbl.index_mapping; /* If there exists inconsistency between MySQL and InnoDB dictionary (metadata) information, the number of index defined in MySQL could exceed that in InnoDB, do not build index translation table in such case */ if (UNIV_UNLIKELY(ib_num_index < mysql_num_index)) { ret = FALSE; goto func_exit; } /* If index entry count is non-zero, nothing has changed since last update, directly return TRUE */ if (share->idx_trans_tbl.index_count) { /* Index entry count should still match mysql_num_index */ ut_a(share->idx_trans_tbl.index_count == mysql_num_index); goto func_exit; } /* The number of index increased, rebuild the mapping table */ if (mysql_num_index > share->idx_trans_tbl.array_size) { index_mapping = (dict_index_t**) my_realloc(index_mapping, mysql_num_index * sizeof(*index_mapping), MYF(MY_ALLOW_ZERO_PTR)); if (!index_mapping) { ret = FALSE; goto func_exit; } share->idx_trans_tbl.array_size = mysql_num_index; } /* For each index in the mysql key_info array, fetch its corresponding InnoDB index pointer into index_mapping array. */ for (ulint count = 0; count < mysql_num_index; count++) { /* Fetch index pointers into index_mapping according to mysql index sequence */ index_mapping[count] = dict_table_get_index_on_name( ib_table, table->key_info[count].name); if (!index_mapping[count]) { sql_print_error("Cannot find index %s in InnoDB " "index dictionary.", table->key_info[count].name); ret = FALSE; goto func_exit; } /* Double check fetched index has the same column info as those in mysql key_info. */ if (!innobase_match_index_columns(&table->key_info[count], index_mapping[count])) { sql_print_error("Found index %s whose column info " "does not match that of MySQL.", table->key_info[count].name); ret = FALSE; goto func_exit; } } /* Successfully built the translation table */ share->idx_trans_tbl.index_count = mysql_num_index; func_exit: if (!ret) { /* Build translation table failed. */ my_free(index_mapping, MYF(MY_ALLOW_ZERO_PTR)); share->idx_trans_tbl.array_size = 0; share->idx_trans_tbl.index_count = 0; index_mapping = NULL; } share->idx_trans_tbl.index_mapping = index_mapping; DBUG_RETURN(ret); } /*******************************************************************//** This function uses index translation table to quickly locate the requested index structure. Note we do not have mutex protection for the index translatoin table access, it is based on the assumption that there is no concurrent translation table rebuild (fter create/drop index) and DMLs that require index lookup. @return dict_index_t structure for requested index. NULL if fail to locate the index structure. */ static dict_index_t* innobase_index_lookup( /*==================*/ INNOBASE_SHARE* share, /*!< in: share structure for index translation table. */ uint keynr) /*!< in: index number for the requested index */ { if (!share->idx_trans_tbl.index_mapping || keynr >= share->idx_trans_tbl.index_count) { return(NULL); } return(share->idx_trans_tbl.index_mapping[keynr]); } /************************************************************************ Set the autoinc column max value. This should only be called once from ha_innobase::open(). Therefore there's no need for a covering lock. */ UNIV_INTERN void ha_innobase::innobase_initialize_autoinc() /*======================================*/ { ulonglong auto_inc; const Field* field = table->found_next_number_field; if (field != NULL) { auto_inc = innobase_get_int_col_max_value(field); } else { /* We have no idea what's been passed in to us as the autoinc column. We set it to the 0, effectively disabling updates to the table. */ auto_inc = 0; ut_print_timestamp(stderr); fprintf(stderr, " InnoDB: Unable to determine the AUTOINC " "column name\n"); } if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) { /* If the recovery level is set so high that writes are disabled we force the AUTOINC counter to 0 value effectively disabling writes to the table. Secondly, we avoid reading the table in case the read results in failure due to a corrupted table/index. We will not return an error to the client, so that the tables can be dumped with minimal hassle. If an error were returned in this case, the first attempt to read the table would fail and subsequent SELECTs would succeed. */ auto_inc = 0; } else if (field == NULL) { /* This is a far more serious error, best to avoid opening the table and return failure. */ my_error(ER_AUTOINC_READ_FAILED, MYF(0)); } else { dict_index_t* index; const char* col_name; ulonglong read_auto_inc; ulint err; update_thd(ha_thd()); ut_a(prebuilt->trx == thd_to_trx(user_thd)); col_name = field->field_name; index = innobase_get_index(table->s->next_number_index); /* Execute SELECT MAX(col_name) FROM TABLE; */ err = row_search_max_autoinc(index, col_name, &read_auto_inc); switch (err) { case DB_SUCCESS: { ulonglong col_max_value; col_max_value = innobase_get_int_col_max_value(field); /* At the this stage we do not know the increment nor the offset, so use a default increment of 1. */ auto_inc = innobase_next_autoinc( read_auto_inc, 1, 1, col_max_value); break; } case DB_RECORD_NOT_FOUND: ut_print_timestamp(stderr); fprintf(stderr, " InnoDB: MySQL and InnoDB data " "dictionaries are out of sync.\n" "InnoDB: Unable to find the AUTOINC column " "%s in the InnoDB table %s.\n" "InnoDB: We set the next AUTOINC column " "value to 0,\n" "InnoDB: in effect disabling the AUTOINC " "next value generation.\n" "InnoDB: You can either set the next " "AUTOINC value explicitly using ALTER TABLE\n" "InnoDB: or fix the data dictionary by " "recreating the table.\n", col_name, index->table->name); /* This will disable the AUTOINC generation. */ auto_inc = 0; /* We want the open to succeed, so that the user can take corrective action. ie. reads should succeed but updates should fail. */ err = DB_SUCCESS; break; default: /* row_search_max_autoinc() should only return one of DB_SUCCESS or DB_RECORD_NOT_FOUND. */ ut_error; } } dict_table_autoinc_initialize(prebuilt->table, auto_inc); } /*****************************************************************//** Creates and opens a handle to a table which already exists in an InnoDB database. @return 1 if error, 0 if success */ UNIV_INTERN int ha_innobase::open( /*==============*/ const char* name, /*!< in: table name */ int mode, /*!< in: not used */ uint test_if_locked) /*!< in: not used */ { dict_table_t* ib_table; char norm_name[1000]; THD* thd; ulint retries = 0; char* is_part = NULL; DBUG_ENTER("ha_innobase::open"); UT_NOT_USED(mode); UT_NOT_USED(test_if_locked); thd = ha_thd(); /* Under some cases MySQL seems to call this function while holding btr_search_latch. This breaks the latching order as we acquire dict_sys->mutex below and leads to a deadlock. */ if (thd != NULL) { innobase_release_temporary_latches(ht, thd); } normalize_table_name(norm_name, name); user_thd = NULL; if (!(share=get_share(name))) { DBUG_RETURN(1); } /* 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. */ upd_and_key_val_buff_len = table->s->reclength + table->s->max_key_length + MAX_REF_PARTS * 3; if (!(uchar*) my_multi_malloc(MYF(MY_WME), &upd_buff, upd_and_key_val_buff_len, &key_val_buff, upd_and_key_val_buff_len, NullS)) { free_share(share); DBUG_RETURN(1); } /* We look for pattern #P# to see if the table is partitioned MySQL table. The retry logic for partitioned tables is a workaround for http://bugs.mysql.com/bug.php?id=33349. Look at support issue https://support.mysql.com/view.php?id=21080 for more details. */ is_part = strstr(norm_name, "#P#"); retry: /* Get pointer to a table object in InnoDB dictionary cache */ ib_table = dict_table_get(norm_name, TRUE); if (NULL == ib_table) { if (is_part && retries < 10) { ++retries; os_thread_sleep(100000); goto retry; } if (is_part) { sql_print_error("Failed to open table %s after " "%lu attempts.\n", norm_name, retries); } sql_print_error("Cannot find or open table %s from\n" "the internal data dictionary of InnoDB " "though the .frm file for the\n" "table exists. Maybe you have deleted and " "recreated InnoDB data\n" "files but have forgotten to delete the " "corresponding .frm files\n" "of InnoDB tables, or you have moved .frm " "files to another database?\n" "or, the table contains indexes that this " "version of the engine\n" "doesn't support.\n" "See " REFMAN "innodb-troubleshooting.html\n" "how you can resolve the problem.\n", norm_name); free_share(share); my_free(upd_buff, MYF(0)); my_errno = ENOENT; DBUG_RETURN(HA_ERR_NO_SUCH_TABLE); } if (ib_table->ibd_file_missing && !thd_tablespace_op(thd)) { 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" "See " REFMAN "innodb-troubleshooting.html\n" "how you can resolve the problem.\n", norm_name); free_share(share); my_free(upd_buff, MYF(0)); my_errno = ENOENT; dict_table_decrement_handle_count(ib_table, FALSE); DBUG_RETURN(HA_ERR_NO_SUCH_TABLE); } prebuilt = row_create_prebuilt(ib_table); prebuilt->mysql_row_len = table->s->reclength; prebuilt->default_rec = table->s->default_values; ut_ad(prebuilt->default_rec); /* Looks like MySQL-3.23 sometimes has primary key number != 0 */ primary_key = table->s->primary_key; key_used_on_scan = primary_key; if (!innobase_build_index_translation(table, ib_table, share)) { sql_print_error("Build InnoDB index translation table for" " Table %s failed", name); } /* Allocate a buffer for a 'row reference'. A row reference is a string of bytes of length ref_length which uniquely specifies a row in our table. Note that MySQL may also compare two row references for equality by doing a simple memcmp on the strings of length ref_length! */ if (!row_table_got_default_clust_index(ib_table)) { prebuilt->clust_index_was_generated = FALSE; if (UNIV_UNLIKELY(primary_key >= MAX_KEY)) { sql_print_error("Table %s has a primary key in " "InnoDB data dictionary, but not " "in MySQL!", name); /* This mismatch could cause further problems if not attended, bring this to the user's attention by printing a warning in addition to log a message in the errorlog */ push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_NO_SUCH_INDEX, "InnoDB: Table %s has a " "primary key in InnoDB data " "dictionary, but not in " "MySQL!", name); /* If primary_key >= MAX_KEY, its (primary_key) value could be out of bound if continue to index into key_info[] array. Find InnoDB primary index, and assign its key_length to ref_length. In addition, since MySQL indexes are sorted starting with primary index, unique index etc., initialize ref_length to the first index key length in case we fail to find InnoDB cluster index. Please note, this will not resolve the primary index mismatch problem, other side effects are possible if users continue to use the table. However, we allow this table to be opened so that user can adopt necessary measures for the mismatch while still being accessible to the table date. */ ref_length = table->key_info[0].key_length; /* Find correspoinding cluster index key length in MySQL's key_info[] array */ for (ulint i = 0; i < table->s->keys; i++) { dict_index_t* index; index = innobase_get_index(i); if (dict_index_is_clust(index)) { ref_length = table->key_info[i].key_length; } } } else { /* MySQL allocates the buffer for ref. key_info->key_length includes space for all key columns + one byte for each column that may be NULL. ref_length must be as exact as possible to save space, because all row reference buffers are allocated based on ref_length. */ ref_length = table->key_info[primary_key].key_length; } } else { if (primary_key != MAX_KEY) { 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); /* This mismatch could cause further problems if not attended, bring this to the user attention by printing a warning in addition to log a message in the errorlog */ push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_NO_SUCH_INDEX, "InnoDB: Table %s has no " "primary key in InnoDB data " "dictionary, but has one in " "MySQL!", name); } prebuilt->clust_index_was_generated = TRUE; ref_length = DATA_ROW_ID_LEN; /* 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. */ if (key_used_on_scan != MAX_KEY) { 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); } } /* Index block size in InnoDB: used by MySQL in query optimization */ stats.block_size = 16 * 1024; /* Init table lock structure */ thr_lock_data_init(&share->lock,&lock,(void*) 0); if (prebuilt->table) { /* We update the highest file format in the system table space, if this table has higher file format setting. */ trx_sys_file_format_max_upgrade( (const char**) &innobase_file_format_check, dict_table_get_format(prebuilt->table)); } /* Only if the table has an AUTOINC column. */ if (prebuilt->table != NULL && table->found_next_number_field != NULL) { dict_table_autoinc_lock(prebuilt->table); /* Since a table can already be "open" in InnoDB's internal data dictionary, we only init the autoinc counter once, the first time the table is loaded. We can safely reuse the autoinc value from a previous MySQL open. */ if (dict_table_autoinc_read(prebuilt->table) == 0) { innobase_initialize_autoinc(); } dict_table_autoinc_unlock(prebuilt->table); } info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST); DBUG_RETURN(0); } UNIV_INTERN uint ha_innobase::max_supported_key_part_length() const { return(DICT_MAX_INDEX_COL_LEN - 1); } /******************************************************************//** Closes a handle to an InnoDB table. @return 0 */ UNIV_INTERN int ha_innobase::close(void) /*====================*/ { THD* thd; DBUG_ENTER("ha_innobase::close"); thd = ha_thd(); if (thd != NULL) { innobase_release_temporary_latches(ht, thd); } row_prebuilt_free(prebuilt, FALSE); my_free(upd_buff, MYF(0)); free_share(share); /* Tell InnoDB server that there might be work for utility threads: */ srv_active_wake_master_thread(); DBUG_RETURN(0); } /* The following accessor functions should really be inside MySQL code! */ /**************************************************************//** Gets field offset for a field in a table. @return offset */ static inline uint get_field_offset( /*=============*/ TABLE* table, /*!< in: MySQL table object */ Field* field) /*!< in: MySQL field object */ { return((uint) (field->ptr - 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. @return 1 if NULL, 0 otherwise */ static inline uint field_in_record_is_null( /*====================*/ 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. */ static 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; } /*************************************************************//** 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! @return 1, 0, -1, if a is greater, equal, less than b, respectively */ extern "C" UNIV_INTERN int innobase_mysql_cmp( /*===============*/ int mysql_type, /*!< in: MySQL type */ uint charset_number, /*!< in: number of the charset */ const unsigned char* a, /*!< in: data field */ unsigned int a_length, /*!< in: data field length, not UNIV_SQL_NULL */ const unsigned char* b, /*!< in: data field */ unsigned int b_length) /*!< in: data field length, not UNIV_SQL_NULL */ { CHARSET_INFO* charset; enum_field_types mysql_tp; int ret; DBUG_ASSERT(a_length != UNIV_SQL_NULL); DBUG_ASSERT(b_length != UNIV_SQL_NULL); mysql_tp = (enum_field_types) mysql_type; switch (mysql_tp) { case MYSQL_TYPE_BIT: case MYSQL_TYPE_STRING: case MYSQL_TYPE_VAR_STRING: case MYSQL_TYPE_TINY_BLOB: case MYSQL_TYPE_MEDIUM_BLOB: case MYSQL_TYPE_BLOB: case MYSQL_TYPE_LONG_BLOB: case MYSQL_TYPE_VARCHAR: /* 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) { sql_print_error("InnoDB needs charset %lu for doing " "a comparison, but MySQL cannot " "find that charset.", (ulong) charset_number); ut_a(0); } } /* Starting from 4.1.3, we use strnncollsp() in comparisons of non-latin1_swedish_ci strings. NOTE that the collation order changes then: 'b\0\0...' is ordered BEFORE 'b ...'. Users having indexes on such data need to rebuild their tables! */ ret = charset->coll->strnncollsp(charset, a, a_length, b, b_length, 0); if (ret < 0) { return(-1); } else if (ret > 0) { return(1); } else { return(0); } default: ut_error; } return(0); } /**************************************************************//** 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'. @return DATA_BINARY, DATA_VARCHAR, ... */ extern "C" UNIV_INTERN ulint get_innobase_type_from_mysql_type( /*==============================*/ ulint* unsigned_flag, /*!< out: DATA_UNSIGNED if an 'unsigned type'; at least ENUM and SET, and unsigned integer types are 'unsigned types' */ const void* f) /*!< in: MySQL Field */ { const class Field* field = reinterpret_cast(f); /* 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 */ compile_time_assert((ulint)MYSQL_TYPE_STRING < 256); compile_time_assert((ulint)MYSQL_TYPE_VAR_STRING < 256); compile_time_assert((ulint)MYSQL_TYPE_DOUBLE < 256); compile_time_assert((ulint)MYSQL_TYPE_FLOAT < 256); compile_time_assert((ulint)MYSQL_TYPE_DECIMAL < 256); *unsigned_flag = 0; switch (field->key_type()) { case HA_KEYTYPE_USHORT_INT: case HA_KEYTYPE_ULONG_INT: case HA_KEYTYPE_UINT24: case HA_KEYTYPE_ULONGLONG: *unsigned_flag = DATA_UNSIGNED; /* fall through */ case HA_KEYTYPE_SHORT_INT: case HA_KEYTYPE_LONG_INT: case HA_KEYTYPE_INT24: case HA_KEYTYPE_INT8: case HA_KEYTYPE_LONGLONG: return(DATA_INT); case HA_KEYTYPE_FLOAT: return(DATA_FLOAT); case HA_KEYTYPE_DOUBLE: return(DATA_DOUBLE); case HA_KEYTYPE_BINARY: if (field->type() == MYSQL_TYPE_TINY) { // compatibility workaround *unsigned_flag= DATA_UNSIGNED; return DATA_INT; } return(DATA_FIXBINARY); case HA_KEYTYPE_VARBINARY2: if (field->type() != MYSQL_TYPE_VARCHAR) return(DATA_BLOB); /* fall through */ case HA_KEYTYPE_VARBINARY1: return(DATA_BINARY); case HA_KEYTYPE_VARTEXT2: if (field->type() != MYSQL_TYPE_VARCHAR) return(DATA_BLOB); /* fall through */ case HA_KEYTYPE_VARTEXT1: if (field->charset() == &my_charset_latin1) { return(DATA_VARCHAR); } else { return(DATA_VARMYSQL); } case HA_KEYTYPE_TEXT: if (field->charset() == &my_charset_latin1) { return(DATA_CHAR); } else { return(DATA_MYSQL); } case HA_KEYTYPE_NUM: return(DATA_DECIMAL); case HA_KEYTYPE_BIT: case HA_KEYTYPE_END: ut_error; } return(0); } /*******************************************************************//** Writes an unsigned integer value < 64k to 2 bytes, in the little-endian storage format. */ static 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. @return value */ static inline uint innobase_read_from_2_little_endian( /*===============================*/ const uchar* buf) /*!< in: from where to read */ { return (uint) ((ulint)(buf[0]) + 256 * ((ulint)(buf[1]))); } /*******************************************************************//** Stores a key value for a row to a buffer. @return key value length as stored in buff */ UNIV_INTERN uint ha_innobase::store_key_val_for_row( /*===============================*/ uint keynr, /*!< in: key number */ char* buff, /*!< in/out: buffer for the key value (in MySQL format) */ uint buff_len,/*!< in: buffer length */ const uchar* record)/*!< in: row in MySQL format */ { KEY* key_info = table->key_info + keynr; KEY_PART_INFO* key_part = key_info->key_part; KEY_PART_INFO* end = key_part + key_info->key_parts; char* buff_start = buff; enum_field_types mysql_type; Field* field; ibool is_null; DBUG_ENTER("store_key_val_for_row"); /* 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 value is the SQL NULL then these data bytes are set to 0. 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 simple memcmp to compare two key values to determine if they are equal. MySQL does this to compare contents of two 'ref' values. */ bzero(buff, buff_len); for (; key_part != end; key_part++) { is_null = FALSE; if (key_part->null_bit) { if (record[key_part->null_offset] & key_part->null_bit) { *buff = 1; is_null = TRUE; } else { *buff = 0; } buff++; } field = key_part->field; mysql_type = field->type(); if (mysql_type == MYSQL_TYPE_VARCHAR) { /* >= 5.0.3 true VARCHAR */ ulint lenlen; ulint len; const byte* data; ulint key_len; ulint true_len; CHARSET_INFO* cs; int error=0; key_len = key_part->length; if (is_null) { buff += key_len + 2; continue; } cs = field->charset(); lenlen = (ulint) (((Field_varstring*)field)->length_bytes); data = row_mysql_read_true_varchar(&len, (byte*) (record + (ulint)get_field_offset(table, field)), lenlen); 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, (uint) (key_len / cs->mbmaxlen), &error); } /* In a column prefix index, we may need to truncate the stored value: */ if (true_len > key_len) { true_len = key_len; } /* The length in a key value is always stored in 2 bytes */ row_mysql_store_true_var_len((byte*)buff, true_len, 2); buff += 2; memcpy(buff, data, true_len); /* 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. */ buff += key_len; } else if (mysql_type == MYSQL_TYPE_TINY_BLOB || mysql_type == MYSQL_TYPE_MEDIUM_BLOB || mysql_type == MYSQL_TYPE_BLOB || mysql_type == MYSQL_TYPE_LONG_BLOB /* MYSQL_TYPE_GEOMETRY data is treated as BLOB data in innodb. */ || mysql_type == MYSQL_TYPE_GEOMETRY) { CHARSET_INFO* cs; ulint key_len; ulint true_len; int error=0; ulint blob_len; const byte* blob_data; ut_a(key_part->key_part_flag & HA_PART_KEY_SEG); key_len = key_part->length; if (is_null) { buff += key_len + 2; continue; } cs = field->charset(); blob_data = row_mysql_read_blob_ref(&blob_len, (byte*) (record + (ulint)get_field_offset(table, field)), (ulint) field->pack_length()); true_len = blob_len; ut_a(get_field_offset(table, field) == 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, (uint) (key_len / cs->mbmaxlen), &error); } /* All indexes on BLOB and TEXT are column prefix indexes, and we may need to truncate the data to be stored in the key value: */ if (true_len > key_len) { true_len = key_len; } /* MySQL reserves 2 bytes for the length and the storage of the number is little-endian */ innobase_write_to_2_little_endian( (byte*)buff, true_len); buff += 2; memcpy(buff, blob_data, true_len); /* Note that we always reserve the maximum possible length of the BLOB prefix in the key value. */ buff += key_len; } else { /* 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. */ CHARSET_INFO* cs; ulint true_len; ulint key_len; const uchar* src_start; int error=0; enum_field_types real_type; key_len = key_part->length; if (is_null) { buff += key_len; continue; } src_start = record + key_part->offset; real_type = field->real_type(); true_len = key_len; /* Character set for the field is defined only to fields whose type is string and real field type is not enum or set. For these fields check if character set is multi byte. */ if (real_type != MYSQL_TYPE_ENUM && real_type != MYSQL_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, (uint) (key_len / cs->mbmaxlen), &error); } } memcpy(buff, src_start, true_len); buff += true_len; /* 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 support surrogate pairs, which are needed to represent characters in the range U+10000 to U+10FFFF. */ if (true_len < key_len) { ulint pad_len = key_len - true_len; memset(buff, ' ', pad_len); buff += pad_len; } } } ut_a(buff <= buff_start + buff_len); DBUG_RETURN((uint)(buff - buff_start)); } /**************************************************************//** Builds a 'template' to the prebuilt struct. The template is used in fast retrieval of just those column values MySQL needs in its processing. */ static void build_template( /*===========*/ row_prebuilt_t* prebuilt, /*!< in/out: prebuilt struct */ THD* thd, /*!< in: current user thread, used only if templ_type is ROW_MYSQL_REC_FIELDS */ TABLE* table, /*!< in: MySQL table */ uint templ_type) /*!< in: ROW_MYSQL_WHOLE_ROW or ROW_MYSQL_REC_FIELDS */ { dict_index_t* index; dict_index_t* clust_index; mysql_row_templ_t* templ; Field* field; ulint n_fields; ulint n_requested_fields = 0; ibool fetch_all_in_key = FALSE; ibool fetch_primary_key_cols = FALSE; ulint i; /* byte offset of the end of last requested column */ ulint mysql_prefix_len = 0; 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. */ templ_type = ROW_MYSQL_WHOLE_ROW; } if (templ_type == ROW_MYSQL_REC_FIELDS) { if (prebuilt->hint_need_to_fetch_extra_cols == ROW_RETRIEVE_ALL_COLS) { /* We know we must at least fetch all columns in the key, or all columns in the table */ 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 */ 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; } } clust_index = dict_table_get_first_index(prebuilt->table); if (templ_type == ROW_MYSQL_REC_FIELDS) { index = prebuilt->index; } else { index = clust_index; } 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 */ } n_fields = (ulint)table->s->fields; /* number of columns */ if (!prebuilt->mysql_template) { prebuilt->mysql_template = (mysql_row_templ_t*) mem_alloc(n_fields * sizeof(mysql_row_templ_t)); } prebuilt->template_type = templ_type; prebuilt->null_bitmap_len = table->s->null_bytes; prebuilt->templ_contains_blob = FALSE; /* Note that in InnoDB, i is the column number. MySQL calls columns 'fields'. */ for (i = 0; i < n_fields; i++) { templ = prebuilt->mysql_template + n_requested_fields; field = table->field[i]; 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); if (!index_contains_field && prebuilt->read_just_key) { /* If this is a 'key read', we do not need columns that are not in the key */ goto skip_field; } if (index_contains_field && fetch_all_in_key) { /* This field is needed in the query */ goto include_field; } if (bitmap_is_set(table->read_set, i) || bitmap_is_set(table->write_set, i)) { /* This field is needed in the query */ goto include_field; } if (fetch_primary_key_cols && dict_table_col_in_clustered_key( index->table, i)) { /* This field is needed in the query */ goto include_field; } /* This field is not needed in the query, skip it */ goto skip_field; } include_field: n_requested_fields++; templ->col_no = i; templ->clust_rec_field_no = dict_col_get_clust_pos( &index->table->cols[i], clust_index); ut_ad(templ->clust_rec_field_no != ULINT_UNDEFINED); if (index == clust_index) { templ->rec_field_no = templ->clust_rec_field_no; } else { templ->rec_field_no = dict_index_get_nth_col_pos( index, i); 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]); templ->mysql_null_bit_mask = (ulint) field->null_bit; } else { templ->mysql_null_bit_mask = 0; } templ->mysql_col_offset = (ulint) get_field_offset(table, field); templ->mysql_col_len = (ulint) field->pack_length(); if (mysql_prefix_len < templ->mysql_col_offset + templ->mysql_col_len) { mysql_prefix_len = templ->mysql_col_offset + templ->mysql_col_len; } templ->type = index->table->cols[i].mtype; templ->mysql_type = (ulint)field->type(); if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR) { templ->mysql_length_bytes = (ulint) (((Field_varstring*)field)->length_bytes); } templ->charset = dtype_get_charset_coll( index->table->cols[i].prtype); templ->mbminlen = index->table->cols[i].mbminlen; templ->mbmaxlen = index->table->cols[i].mbmaxlen; templ->is_unsigned = index->table->cols[i].prtype & DATA_UNSIGNED; if (templ->type == DATA_BLOB) { prebuilt->templ_contains_blob = TRUE; } skip_field: ; } prebuilt->n_template = n_requested_fields; prebuilt->mysql_prefix_len = mysql_prefix_len; if (index != clust_index && prebuilt->need_to_access_clustered) { /* Change rec_field_no's to correspond to the clustered index record */ for (i = 0; i < n_requested_fields; i++) { templ = prebuilt->mysql_template + i; templ->rec_field_no = templ->clust_rec_field_no; } } } /********************************************************************//** This special handling is really to overcome the limitations of MySQL's binlogging. We need to eliminate the non-determinism that will arise in INSERT ... SELECT type of statements, since MySQL binlog only stores the min value of the autoinc interval. Once that is fixed we can get rid of the special lock handling. @return DB_SUCCESS if all OK else error code */ UNIV_INTERN ulint ha_innobase::innobase_lock_autoinc(void) /*====================================*/ { ulint error = DB_SUCCESS; switch (innobase_autoinc_lock_mode) { case AUTOINC_NO_LOCKING: /* Acquire only the AUTOINC mutex. */ dict_table_autoinc_lock(prebuilt->table); break; case AUTOINC_NEW_STYLE_LOCKING: /* For simple (single/multi) row INSERTs, we fallback to the old style only if another transaction has already acquired the AUTOINC lock on behalf of a LOAD FILE or INSERT ... SELECT etc. type of statement. */ if (thd_sql_command(user_thd) == SQLCOM_INSERT || thd_sql_command(user_thd) == SQLCOM_REPLACE) { dict_table_t* table = prebuilt->table; /* Acquire the AUTOINC mutex. */ dict_table_autoinc_lock(table); /* We need to check that another transaction isn't already holding the AUTOINC lock on the table. */ if (table->n_waiting_or_granted_auto_inc_locks) { /* Release the mutex to avoid deadlocks. */ dict_table_autoinc_unlock(table); } else { break; } } /* Fall through to old style locking. */ case AUTOINC_OLD_STYLE_LOCKING: error = row_lock_table_autoinc_for_mysql(prebuilt); if (error == DB_SUCCESS) { /* Acquire the AUTOINC mutex. */ dict_table_autoinc_lock(prebuilt->table); } break; default: ut_error; } return(ulong(error)); } /********************************************************************//** Reset the autoinc value in the table. @return DB_SUCCESS if all went well else error code */ UNIV_INTERN ulint ha_innobase::innobase_reset_autoinc( /*================================*/ ulonglong autoinc) /*!< in: value to store */ { ulint error; error = innobase_lock_autoinc(); if (error == DB_SUCCESS) { dict_table_autoinc_initialize(prebuilt->table, autoinc); dict_table_autoinc_unlock(prebuilt->table); } return(ulong(error)); } /********************************************************************//** Store the autoinc value in the table. The autoinc value is only set if it's greater than the existing autoinc value in the table. @return DB_SUCCESS if all went well else error code */ UNIV_INTERN ulint ha_innobase::innobase_set_max_autoinc( /*==================================*/ ulonglong auto_inc) /*!< in: value to store */ { ulint error; error = innobase_lock_autoinc(); if (error == DB_SUCCESS) { dict_table_autoinc_update_if_greater(prebuilt->table, auto_inc); dict_table_autoinc_unlock(prebuilt->table); } return(ulong(error)); } /********************************************************************//** Stores a row in an InnoDB database, to the table specified in this handle. @return error code */ UNIV_INTERN int ha_innobase::write_row( /*===================*/ uchar* record) /*!< in: a row in MySQL format */ { ulint error = 0; int error_result= 0; ibool auto_inc_used= FALSE; ulint sql_command; trx_t* trx = thd_to_trx(user_thd); DBUG_ENTER("ha_innobase::write_row"); if (prebuilt->trx != trx) { sql_print_error("The transaction object for the table handle is at " "%p, but for the current thread it is at %p", (const void*) prebuilt->trx, (const void*) trx); 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 ha_data: ", stderr); ut_print_buf(stderr, ((const byte*) trx) - 100, 200); putc('\n', stderr); ut_error; } ha_statistic_increment(&SSV::ha_write_count); if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT) table->timestamp_field->set_time(); sql_command = thd_sql_command(user_thd); if ((sql_command == SQLCOM_ALTER_TABLE || sql_command == SQLCOM_OPTIMIZE || sql_command == SQLCOM_CREATE_INDEX || sql_command == SQLCOM_DROP_INDEX) && num_write_row >= 10000) { /* 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. */ dict_table_t* src_table; enum lock_mode mode; num_write_row = 0; /* Commit the transaction. This will release the table locks, so they have to be acquired again. */ /* Altering an InnoDB table */ /* Get the source table. */ src_table = lock_get_src_table( prebuilt->trx, prebuilt->table, &mode); if (!src_table) { no_commit: /* Unknown situation: do not commit */ /* ut_print_timestamp(stderr); fprintf(stderr, " InnoDB: 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. */ /* Altering to InnoDB format */ innobase_commit(ht, user_thd, 1); /* Note that this transaction is still active. */ prebuilt->trx->active_flag |= TRX_ACTIVE_IN_MYSQL; /* We will need an IX lock on the destination table. */ prebuilt->sql_stat_start = TRUE; } else { /* Ensure that there are no other table locks than LOCK_IX and LOCK_AUTO_INC on the destination table. */ if (!lock_is_table_exclusive(prebuilt->table, prebuilt->trx)) { goto no_commit; } /* Commit the transaction. This will release the table locks, so they have to be acquired again. */ innobase_commit(ht, user_thd, 1); /* Note that this transaction is still active. */ prebuilt->trx->active_flag |= TRX_ACTIVE_IN_MYSQL; /* Re-acquire the table lock on the source table. */ row_lock_table_for_mysql(prebuilt, src_table, mode); /* We will need an IX lock on the destination table. */ prebuilt->sql_stat_start = TRUE; } } num_write_row++; /* This is the case where the table has an auto-increment column */ if (table->next_number_field && record == table->record[0]) { /* Reset the error code before calling innobase_get_auto_increment(). */ prebuilt->autoinc_error = DB_SUCCESS; if ((error = update_auto_increment())) { /* We don't want to mask autoinc overflow errors. */ /* Handle the case where the AUTOINC sub-system failed during initialization. */ if (prebuilt->autoinc_error == DB_UNSUPPORTED) { error_result = ER_AUTOINC_READ_FAILED; /* Set the error message to report too. */ my_error(ER_AUTOINC_READ_FAILED, MYF(0)); goto func_exit; } else if (prebuilt->autoinc_error != DB_SUCCESS) { error = (int) prebuilt->autoinc_error; goto report_error; } /* MySQL errors are passed straight back. */ error_result = (int) error; goto func_exit; } auto_inc_used = TRUE; } if (prebuilt->mysql_template == NULL || prebuilt->template_type != ROW_MYSQL_WHOLE_ROW) { /* Build the template used in converting quickly between the two database formats */ build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW); } innodb_srv_conc_enter_innodb(prebuilt->trx); error = row_insert_for_mysql((byte*) record, prebuilt); /* Handle duplicate key errors */ if (auto_inc_used) { ulint err; ulonglong auto_inc; ulonglong col_max_value; /* Note the number of rows processed for this statement, used by get_auto_increment() to determine the number of AUTO-INC values to reserve. This is only useful for a mult-value INSERT and is a statement level counter.*/ if (trx->n_autoinc_rows > 0) { --trx->n_autoinc_rows; } /* We need the upper limit of the col type to check for whether we update the table autoinc counter or not. */ col_max_value = innobase_get_int_col_max_value( table->next_number_field); /* Get the value that MySQL attempted to store in the table.*/ auto_inc = table->next_number_field->val_int(); switch (error) { case DB_DUPLICATE_KEY: /* A REPLACE command and LOAD DATA INFILE REPLACE handle a duplicate key error themselves, but we must update the autoinc counter if we are performing those statements. */ switch (sql_command) { case SQLCOM_LOAD: if ((trx->duplicates & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))) { goto set_max_autoinc; } break; case SQLCOM_REPLACE: case SQLCOM_INSERT_SELECT: case SQLCOM_REPLACE_SELECT: goto set_max_autoinc; default: break; } break; case DB_SUCCESS: /* If the actual value inserted is greater than the upper limit of the interval, then we try and update the table upper limit. Note: last_value will be 0 if get_auto_increment() was not called.*/ if (auto_inc >= prebuilt->autoinc_last_value) { set_max_autoinc: /* This should filter out the negative values set explicitly by the user. */ if (auto_inc <= col_max_value) { ut_a(prebuilt->autoinc_increment > 0); ulonglong need; ulonglong offset; offset = prebuilt->autoinc_offset; need = prebuilt->autoinc_increment; auto_inc = innobase_next_autoinc( auto_inc, need, offset, col_max_value); err = innobase_set_max_autoinc( auto_inc); if (err != DB_SUCCESS) { error = err; } } } break; } } innodb_srv_conc_exit_innodb(prebuilt->trx); report_error: error_result = convert_error_code_to_mysql((int) error, prebuilt->table->flags, user_thd); func_exit: innobase_active_small(); DBUG_RETURN(error_result); } /**********************************************************************//** Checks which fields have changed in a row and stores information of them to an update vector. @return error number or 0 */ static int calc_row_difference( /*================*/ upd_t* uvect, /*!< in/out: update vector */ uchar* old_row, /*!< in: old row in MySQL format */ uchar* new_row, /*!< in: new row in MySQL format */ struct st_table* table, /*!< in: table in MySQL data dictionary */ uchar* upd_buff, /*!< in: buffer to use */ ulint buff_len, /*!< in: buffer length */ row_prebuilt_t* prebuilt, /*!< in: InnoDB prebuilt struct */ THD* thd) /*!< in: user thread */ { uchar* original_upd_buff = upd_buff; Field* field; enum_field_types field_mysql_type; uint n_fields; ulint o_len; ulint n_len; ulint col_pack_len; const byte* new_mysql_row_col; const byte* o_ptr; const byte* n_ptr; byte* buf; upd_field_t* ufield; ulint col_type; ulint n_changed = 0; dfield_t dfield; dict_index_t* clust_index; uint i; n_fields = table->s->fields; clust_index = dict_table_get_first_index(prebuilt->table); /* We use upd_buff to convert changed fields */ buf = (byte*) upd_buff; for (i = 0; i < n_fields; i++) { field = table->field[i]; o_ptr = (const byte*) old_row + get_field_offset(table, field); n_ptr = (const byte*) new_row + get_field_offset(table, field); /* Use new_mysql_row_col and col_pack_len save the values */ new_mysql_row_col = n_ptr; col_pack_len = field->pack_length(); o_len = col_pack_len; n_len = col_pack_len; /* We use o_ptr and n_ptr to dig up the actual data for comparison. */ field_mysql_type = field->type(); col_type = prebuilt->table->cols[i].mtype; switch (col_type) { case DATA_BLOB: o_ptr = row_mysql_read_blob_ref(&o_len, o_ptr, o_len); n_ptr = row_mysql_read_blob_ref(&n_len, n_ptr, n_len); break; case DATA_VARCHAR: case DATA_BINARY: case DATA_VARMYSQL: 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 */ o_ptr = row_mysql_read_true_varchar( &o_len, o_ptr, (ulint) (((Field_varstring*)field)->length_bytes)); n_ptr = row_mysql_read_true_varchar( &n_len, n_ptr, (ulint) (((Field_varstring*)field)->length_bytes)); } break; default: ; } if (field->null_ptr) { if (field_in_record_is_null(table, field, (char*) old_row)) { o_len = UNIV_SQL_NULL; } if (field_in_record_is_null(table, field, (char*) new_row)) { n_len = UNIV_SQL_NULL; } } if (o_len != n_len || (o_len != UNIV_SQL_NULL && 0 != memcmp(o_ptr, n_ptr, o_len))) { /* The field has changed */ ufield = uvect->fields + n_changed; /* Let us use a dummy dfield to make the conversion from the MySQL column format to the InnoDB format */ dict_col_copy_type(prebuilt->table->cols + i, dfield_get_type(&dfield)); if (n_len != UNIV_SQL_NULL) { buf = row_mysql_store_col_in_innobase_format( &dfield, (byte*)buf, TRUE, new_mysql_row_col, col_pack_len, dict_table_is_comp(prebuilt->table)); dfield_copy_data(&ufield->new_val, &dfield); } else { dfield_set_null(&ufield->new_val); } ufield->exp = NULL; ufield->orig_len = 0; ufield->field_no = dict_col_get_clust_pos( &prebuilt->table->cols[i], clust_index); n_changed++; } } uvect->n_fields = n_changed; uvect->info_bits = 0; ut_a(buf <= (byte*)original_upd_buff + buff_len); 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. TODO: currently InnoDB does not prevent the 'Halloween problem': in a searched update a single row can get updated several times if its index columns are updated! @return error number or 0 */ UNIV_INTERN int ha_innobase::update_row( /*====================*/ const uchar* old_row, /*!< in: old row in MySQL format */ uchar* new_row) /*!< in: new row in MySQL format */ { upd_t* uvect; int error = 0; trx_t* trx = thd_to_trx(user_thd); DBUG_ENTER("ha_innobase::update_row"); ut_a(prebuilt->trx == trx); ha_statistic_increment(&SSV::ha_update_count); if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE) table->timestamp_field->set_time(); if (prebuilt->upd_node) { uvect = prebuilt->upd_node->update; } else { uvect = row_get_prebuilt_update_vector(prebuilt); } /* Build an update vector from the modified fields in the rows (uses upd_buff of the handle) */ calc_row_difference(uvect, (uchar*) old_row, new_row, table, upd_buff, (ulint)upd_and_key_val_buff_len, prebuilt, user_thd); /* This is not a delete */ prebuilt->upd_node->is_delete = FALSE; ut_a(prebuilt->template_type == ROW_MYSQL_WHOLE_ROW); innodb_srv_conc_enter_innodb(trx); error = row_update_for_mysql((byte*) old_row, prebuilt); /* We need to do some special AUTOINC handling for the following case: INSERT INTO t (c1,c2) VALUES(x,y) ON DUPLICATE KEY UPDATE ... We need to use the AUTOINC counter that was actually used by MySQL in the UPDATE statement, which can be different from the value used in the INSERT statement.*/ if (error == DB_SUCCESS && table->next_number_field && new_row == table->record[0] && thd_sql_command(user_thd) == SQLCOM_INSERT && (trx->duplicates & (TRX_DUP_IGNORE | TRX_DUP_REPLACE)) == TRX_DUP_IGNORE) { ulonglong auto_inc; ulonglong col_max_value; auto_inc = table->next_number_field->val_int(); /* We need the upper limit of the col type to check for whether we update the table autoinc counter or not. */ col_max_value = innobase_get_int_col_max_value( table->next_number_field); if (auto_inc <= col_max_value && auto_inc != 0) { ulonglong need; ulonglong offset; offset = prebuilt->autoinc_offset; need = prebuilt->autoinc_increment; auto_inc = innobase_next_autoinc( auto_inc, need, offset, col_max_value); error = innobase_set_max_autoinc(auto_inc); } } innodb_srv_conc_exit_innodb(trx); error = convert_error_code_to_mysql(error, prebuilt->table->flags, user_thd); if (error == 0 /* success */ && uvect->n_fields == 0 /* no columns were updated */) { /* This is the same as success, but instructs MySQL that the row is not really updated and it should not increase the count of updated rows. This is fix for http://bugs.mysql.com/29157 */ error = HA_ERR_RECORD_IS_THE_SAME; } /* Tell InnoDB server that there might be work for utility threads: */ innobase_active_small(); DBUG_RETURN(error); } /**********************************************************************//** Deletes a row given as the parameter. @return error number or 0 */ UNIV_INTERN int ha_innobase::delete_row( /*====================*/ const uchar* record) /*!< in: a row in MySQL format */ { int error = 0; trx_t* trx = thd_to_trx(user_thd); DBUG_ENTER("ha_innobase::delete_row"); ut_a(prebuilt->trx == trx); ha_statistic_increment(&SSV::ha_delete_count); if (!prebuilt->upd_node) { row_get_prebuilt_update_vector(prebuilt); } /* This is a delete */ prebuilt->upd_node->is_delete = TRUE; innodb_srv_conc_enter_innodb(trx); error = row_update_for_mysql((byte*) record, prebuilt); innodb_srv_conc_exit_innodb(trx); error = convert_error_code_to_mysql( error, prebuilt->table->flags, user_thd); /* Tell the InnoDB server that there might be work for utility threads: */ innobase_active_small(); DBUG_RETURN(error); } /**********************************************************************//** Removes a new lock set on a row, if it was not read optimistically. This can 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. */ UNIV_INTERN void ha_innobase::unlock_row(void) /*=========================*/ { DBUG_ENTER("ha_innobase::unlock_row"); /* Consistent read does not take any locks, thus there is nothing to unlock. */ if (prebuilt->select_lock_type == LOCK_NONE) { DBUG_VOID_RETURN; } switch (prebuilt->row_read_type) { case ROW_READ_WITH_LOCKS: if (!srv_locks_unsafe_for_binlog && prebuilt->trx->isolation_level > TRX_ISO_READ_COMMITTED) { break; } /* fall through */ case ROW_READ_TRY_SEMI_CONSISTENT: row_unlock_for_mysql(prebuilt, FALSE); 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. */ UNIV_INTERN bool ha_innobase::was_semi_consistent_read(void) /*=======================================*/ { return(prebuilt->row_read_type == ROW_READ_DID_SEMI_CONSISTENT); } /* See handler.h and row0mysql.h for docs on this function. */ UNIV_INTERN void ha_innobase::try_semi_consistent_read(bool yes) /*===========================================*/ { ut_a(prebuilt->trx == thd_to_trx(ha_thd())); /* 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)) { prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT; } else { prebuilt->row_read_type = ROW_READ_WITH_LOCKS; } } /******************************************************************//** Initializes a handle to use an index. @return 0 or error number */ UNIV_INTERN int ha_innobase::index_init( /*====================*/ uint keynr, /*!< in: key (index) number */ bool sorted) /*!< in: 1 if result MUST be sorted according to index */ { DBUG_ENTER("index_init"); DBUG_RETURN(change_active_index(keynr)); } /******************************************************************//** Currently does nothing. @return 0 */ UNIV_INTERN int ha_innobase::index_end(void) /*========================*/ { int error = 0; DBUG_ENTER("index_end"); active_index=MAX_KEY; DBUG_RETURN(error); } /*********************************************************************//** Converts a search mode flag understood by MySQL to a flag understood by InnoDB. */ static inline ulint convert_search_mode_to_innobase( /*============================*/ enum ha_rkey_function find_flag) { switch (find_flag) { case HA_READ_KEY_EXACT: /* this does not require the index to be UNIQUE */ return(PAGE_CUR_GE); case HA_READ_KEY_OR_NEXT: return(PAGE_CUR_GE); case HA_READ_KEY_OR_PREV: return(PAGE_CUR_LE); case HA_READ_AFTER_KEY: return(PAGE_CUR_G); case HA_READ_BEFORE_KEY: return(PAGE_CUR_L); case HA_READ_PREFIX: return(PAGE_CUR_GE); case HA_READ_PREFIX_LAST: return(PAGE_CUR_LE); case HA_READ_PREFIX_LAST_OR_PREV: return(PAGE_CUR_LE); /* In MySQL-4.0 HA_READ_PREFIX and HA_READ_PREFIX_LAST always pass a complete-field prefix of a key value as the search 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 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. */ case HA_READ_MBR_CONTAIN: case HA_READ_MBR_INTERSECT: case HA_READ_MBR_WITHIN: case HA_READ_MBR_DISJOINT: case HA_READ_MBR_EQUAL: return(PAGE_CUR_UNSUPP); /* do not use "default:" in order to produce a gcc warning: enumeration value '...' not handled in switch (if -Wswitch or -Wall is used) */ } my_error(ER_CHECK_NOT_IMPLEMENTED, MYF(0), "this functionality"); return(PAGE_CUR_UNSUPP); } /* 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. */ /**********************************************************************//** Positions an index cursor to the index specified in the handle. Fetches the row if any. @return 0, HA_ERR_KEY_NOT_FOUND, or error number */ UNIV_INTERN int ha_innobase::index_read( /*====================*/ uchar* buf, /*!< in/out: buffer for the returned row */ const uchar* key_ptr, /*!< in: key value; if this is NULL we position the cursor at the start or end of index; this can also contain an InnoDB row id, in which case key_len is the InnoDB 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 */ uint key_len,/*!< in: key value length */ enum ha_rkey_function find_flag)/*!< in: search flags from my_base.h */ { ulint mode; dict_index_t* index; ulint match_mode = 0; int error; ulint ret; DBUG_ENTER("index_read"); ut_a(prebuilt->trx == thd_to_trx(user_thd)); ha_statistic_increment(&SSV::ha_read_key_count); index = prebuilt->index; if (UNIV_UNLIKELY(index == NULL)) { prebuilt->index_usable = FALSE; DBUG_RETURN(HA_ERR_CRASHED); } if (UNIV_UNLIKELY(!prebuilt->index_usable)) { DBUG_RETURN(HA_ERR_TABLE_DEF_CHANGED); } /* Note that if the index for which the search template is built is not necessarily prebuilt->index, but can also be the clustered index */ if (prebuilt->sql_stat_start) { build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS); } if (key_ptr) { /* Convert the search key value to InnoDB format into prebuilt->search_tuple */ row_sel_convert_mysql_key_to_innobase( prebuilt->search_tuple, (byte*) key_val_buff, (ulint)upd_and_key_val_buff_len, index, (byte*) key_ptr, (ulint) key_len, prebuilt->trx); } else { /* We position the cursor to the last or the first entry in the index */ dtuple_set_n_fields(prebuilt->search_tuple, 0); } mode = convert_search_mode_to_innobase(find_flag); match_mode = 0; if (find_flag == HA_READ_KEY_EXACT) { match_mode = ROW_SEL_EXACT; } else if (find_flag == HA_READ_PREFIX || find_flag == HA_READ_PREFIX_LAST) { match_mode = ROW_SEL_EXACT_PREFIX; } last_match_mode = (uint) match_mode; if (mode != PAGE_CUR_UNSUPP) { innodb_srv_conc_enter_innodb(prebuilt->trx); ret = row_search_for_mysql((byte*) buf, mode, prebuilt, match_mode, 0); innodb_srv_conc_exit_innodb(prebuilt->trx); } else { ret = DB_UNSUPPORTED; } switch (ret) { case DB_SUCCESS: error = 0; table->status = 0; break; case DB_RECORD_NOT_FOUND: error = HA_ERR_KEY_NOT_FOUND; table->status = STATUS_NOT_FOUND; break; case DB_END_OF_INDEX: error = HA_ERR_KEY_NOT_FOUND; table->status = STATUS_NOT_FOUND; break; default: error = convert_error_code_to_mysql((int) ret, prebuilt->table->flags, user_thd); table->status = STATUS_NOT_FOUND; break; } DBUG_RETURN(error); } /*******************************************************************//** The following functions works like index_read, but it find the last row with the current key value or prefix. @return 0, HA_ERR_KEY_NOT_FOUND, or an error code */ UNIV_INTERN int ha_innobase::index_read_last( /*=========================*/ uchar* buf, /*!< out: fetched row */ const uchar* key_ptr,/*!< in: key value, or a prefix of a full key value */ uint key_len)/*!< in: length of the key val or prefix in bytes */ { return(index_read(buf, key_ptr, key_len, HA_READ_PREFIX_LAST)); } /********************************************************************//** Get the index for a handle. Does not change active index. @return NULL or index instance. */ UNIV_INTERN dict_index_t* ha_innobase::innobase_get_index( /*============================*/ uint keynr) /*!< in: use this index; MAX_KEY means always clustered index, even if it was internally generated by InnoDB */ { KEY* key = 0; dict_index_t* index = 0; DBUG_ENTER("innobase_get_index"); ha_statistic_increment(&SSV::ha_read_key_count); if (keynr != MAX_KEY && table->s->keys > 0) { key = table->key_info + keynr; index = innobase_index_lookup(share, keynr); if (index) { ut_a(ut_strcmp(index->name, key->name) == 0); } else { /* Can't find index with keynr in the translation table. Only print message if the index translation table exists */ if (share->idx_trans_tbl.index_mapping) { sql_print_error("InnoDB could not find " "index %s key no %u for " "table %s through its " "index translation table", key ? key->name : "NULL", keynr, prebuilt->table->name); } index = dict_table_get_index_on_name(prebuilt->table, key->name); } } else { index = dict_table_get_first_index(prebuilt->table); } if (!index) { 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(index); } /********************************************************************//** Changes the active index of a handle. @return 0 or error code */ UNIV_INTERN int ha_innobase::change_active_index( /*=============================*/ uint keynr) /*!< in: use this index; MAX_KEY means always clustered index, even if it was internally generated by InnoDB */ { DBUG_ENTER("change_active_index"); ut_ad(user_thd == ha_thd()); ut_a(prebuilt->trx == thd_to_trx(user_thd)); active_index = keynr; prebuilt->index = innobase_get_index(keynr); if (UNIV_UNLIKELY(!prebuilt->index)) { sql_print_warning("InnoDB: change_active_index(%u) failed", keynr); prebuilt->index_usable = FALSE; DBUG_RETURN(1); } prebuilt->index_usable = row_merge_is_index_usable(prebuilt->trx, prebuilt->index); if (UNIV_UNLIKELY(!prebuilt->index_usable)) { push_warning_printf(user_thd, MYSQL_ERROR::WARN_LEVEL_WARN, HA_ERR_TABLE_DEF_CHANGED, "InnoDB: insufficient history for index %u", keynr); /* The caller seems to ignore this. Thus, we must check this again in row_search_for_mysql(). */ DBUG_RETURN(convert_error_code_to_mysql(DB_MISSING_HISTORY, 0, NULL)); } ut_a(prebuilt->search_tuple != 0); dtuple_set_n_fields(prebuilt->search_tuple, prebuilt->index->n_fields); dict_index_copy_types(prebuilt->search_tuple, prebuilt->index, prebuilt->index->n_fields); /* 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. */ build_template(prebuilt, user_thd, table, ROW_MYSQL_REC_FIELDS); DBUG_RETURN(0); } /**********************************************************************//** Positions an index cursor to the index specified in keynr. Fetches the row if any. ??? This is only used to read whole keys ??? @return error number or 0 */ UNIV_INTERN int ha_innobase::index_read_idx( /*========================*/ uchar* buf, /*!< in/out: buffer for the returned row */ uint keynr, /*!< in: use this index */ const uchar* key, /*!< in: key value; if this is NULL 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 */ { if (change_active_index(keynr)) { return(1); } 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. @return 0, HA_ERR_END_OF_FILE, or error number */ UNIV_INTERN int ha_innobase::general_fetch( /*=======================*/ uchar* buf, /*!< in/out: buffer for next row in MySQL format */ uint direction, /*!< in: ROW_SEL_NEXT or ROW_SEL_PREV */ uint match_mode) /*!< in: 0, ROW_SEL_EXACT, or ROW_SEL_EXACT_PREFIX */ { ulint ret; int error = 0; DBUG_ENTER("general_fetch"); ut_a(prebuilt->trx == thd_to_trx(user_thd)); innodb_srv_conc_enter_innodb(prebuilt->trx); ret = row_search_for_mysql( (byte*)buf, 0, prebuilt, match_mode, direction); innodb_srv_conc_exit_innodb(prebuilt->trx); switch (ret) { case DB_SUCCESS: error = 0; table->status = 0; break; case DB_RECORD_NOT_FOUND: error = HA_ERR_END_OF_FILE; table->status = STATUS_NOT_FOUND; break; case DB_END_OF_INDEX: error = HA_ERR_END_OF_FILE; table->status = STATUS_NOT_FOUND; break; default: error = convert_error_code_to_mysql( (int) ret, prebuilt->table->flags, user_thd); table->status = STATUS_NOT_FOUND; break; } DBUG_RETURN(error); } /***********************************************************************//** Reads the next row from a cursor, which must have previously been positioned using index_read. @return 0, HA_ERR_END_OF_FILE, or error number */ UNIV_INTERN int ha_innobase::index_next( /*====================*/ uchar* buf) /*!< in/out: buffer for next row in MySQL format */ { ha_statistic_increment(&SSV::ha_read_next_count); return(general_fetch(buf, ROW_SEL_NEXT, 0)); } /*******************************************************************//** Reads the next row matching to the key value given as the parameter. @return 0, HA_ERR_END_OF_FILE, or error number */ UNIV_INTERN int ha_innobase::index_next_same( /*=========================*/ uchar* buf, /*!< in/out: buffer for the row */ const uchar* key, /*!< in: key value */ uint keylen) /*!< in: key value length */ { ha_statistic_increment(&SSV::ha_read_next_count); 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. @return 0, HA_ERR_END_OF_FILE, or error number */ UNIV_INTERN int ha_innobase::index_prev( /*====================*/ uchar* buf) /*!< in/out: buffer for previous row in MySQL format */ { ha_statistic_increment(&SSV::ha_read_prev_count); 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. @return 0, HA_ERR_END_OF_FILE, or error code */ UNIV_INTERN int ha_innobase::index_first( /*=====================*/ uchar* buf) /*!< in/out: buffer for the row */ { int error; DBUG_ENTER("index_first"); ha_statistic_increment(&SSV::ha_read_first_count); error = index_read(buf, NULL, 0, HA_READ_AFTER_KEY); /* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */ if (error == HA_ERR_KEY_NOT_FOUND) { error = HA_ERR_END_OF_FILE; } DBUG_RETURN(error); } /********************************************************************//** Positions a cursor on the last record in an index and reads the corresponding row to buf. @return 0, HA_ERR_END_OF_FILE, or error code */ UNIV_INTERN int ha_innobase::index_last( /*====================*/ uchar* buf) /*!< in/out: buffer for the row */ { int error; DBUG_ENTER("index_last"); ha_statistic_increment(&SSV::ha_read_last_count); error = index_read(buf, NULL, 0, HA_READ_BEFORE_KEY); /* MySQL does not seem to allow this to return HA_ERR_KEY_NOT_FOUND */ if (error == HA_ERR_KEY_NOT_FOUND) { error = HA_ERR_END_OF_FILE; } DBUG_RETURN(error); } /****************************************************************//** Initialize a table scan. @return 0 or error number */ UNIV_INTERN int ha_innobase::rnd_init( /*==================*/ bool scan) /*!< in: TRUE if table/index scan FALSE otherwise */ { int err; /* Store the active index value so that we can restore the original value after a scan */ if (prebuilt->clust_index_was_generated) { err = change_active_index(MAX_KEY); } else { err = change_active_index(primary_key); } /* 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); } start_of_scan = 1; return(err); } /*****************************************************************//** Ends a table scan. @return 0 or error number */ UNIV_INTERN int ha_innobase::rnd_end(void) /*======================*/ { return(index_end()); } /*****************************************************************//** Reads the next row in a table scan (also used to read the FIRST row in a table scan). @return 0, HA_ERR_END_OF_FILE, or error number */ UNIV_INTERN int ha_innobase::rnd_next( /*==================*/ uchar* buf) /*!< in/out: returns the row in this buffer, in MySQL format */ { int error; DBUG_ENTER("rnd_next"); ha_statistic_increment(&SSV::ha_read_rnd_next_count); if (start_of_scan) { error = index_first(buf); if (error == HA_ERR_KEY_NOT_FOUND) { error = HA_ERR_END_OF_FILE; } start_of_scan = 0; } else { error = general_fetch(buf, ROW_SEL_NEXT, 0); } DBUG_RETURN(error); } /**********************************************************************//** Fetches a row from the table based on a row reference. @return 0, HA_ERR_KEY_NOT_FOUND, or error code */ UNIV_INTERN int ha_innobase::rnd_pos( /*=================*/ uchar* buf, /*!< in/out: buffer for the row */ uchar* 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 */ { int error; uint keynr = active_index; DBUG_ENTER("rnd_pos"); DBUG_DUMP("key", pos, ref_length); ha_statistic_increment(&SSV::ha_read_rnd_count); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); if (prebuilt->clust_index_was_generated) { /* No primary key was defined for the table and we generated the clustered index from the row id: the row reference is the row id, not any key value that MySQL knows of */ error = change_active_index(MAX_KEY); } else { error = change_active_index(primary_key); } if (error) { DBUG_PRINT("error", ("Got error: %d", error)); DBUG_RETURN(error); } /* Note that we assume the length of the row reference is fixed for the table, and it is == ref_length */ error = index_read(buf, pos, ref_length, HA_READ_KEY_EXACT); if (error) { DBUG_PRINT("error", ("Got error: %d", error)); } change_active_index(keynr); DBUG_RETURN(error); } /*********************************************************************//** Stores a reference to the current row to 'ref' field of the handle. Note that in the case where we have generated the clustered index for the table, the function parameter is illogical: we MUST ASSUME that 'record' is the current 'position' of the handle, because if row ref is actually the row id internally generated in InnoDB, then 'record' does not contain it. We just guess that the row id must be for the record where the handle was positioned the last time. */ UNIV_INTERN void ha_innobase::position( /*==================*/ const uchar* record) /*!< in: row in MySQL format */ { uint len; ut_a(prebuilt->trx == thd_to_trx(ha_thd())); if (prebuilt->clust_index_was_generated) { /* No primary key was defined for the table and we generated the clustered index from row id: the row reference will be the row id, not any key value that MySQL knows of */ len = DATA_ROW_ID_LEN; memcpy(ref, prebuilt->row_id, len); } else { len = store_key_val_for_row(primary_key, (char*)ref, ref_length, record); } /* We assume that the 'ref' value len is always fixed for the same table. */ if (len != ref_length) { sql_print_error("Stored ref len is %lu, but table ref len is %lu", (ulong) len, (ulong) ref_length); } } /* limit innodb monitor access to users with PROCESS privilege. See http://bugs.mysql.com/32710 for expl. why we choose PROCESS. */ #define IS_MAGIC_TABLE_AND_USER_DENIED_ACCESS(table_name, thd) \ (row_is_magic_monitor_table(table_name) \ && check_global_access(thd, PROCESS_ACL)) /*****************************************************************//** Creates a table definition to an InnoDB database. */ static int create_table_def( /*=============*/ trx_t* trx, /*!< in: InnoDB transaction handle */ TABLE* form, /*!< in: information on table columns and indexes */ const char* table_name, /*!< in: table name */ const char* path_of_temp_table,/*!< in: if this is a table explicitly 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 */ ulint flags) /*!< in: table flags */ { Field* field; dict_table_t* table; ulint n_cols; int error; ulint col_type; ulint col_len; ulint nulls_allowed; ulint unsigned_type; ulint binary_type; ulint long_true_varchar; ulint charset_no; ulint i; DBUG_ENTER("create_table_def"); DBUG_PRINT("enter", ("table_name: %s", table_name)); ut_a(trx->mysql_thd != NULL); if (IS_MAGIC_TABLE_AND_USER_DENIED_ACCESS(table_name, (THD*) trx->mysql_thd)) { DBUG_RETURN(HA_ERR_GENERIC); } /* MySQL does the name length check. But we do additional check on the name length here */ if (strlen(table_name) > MAX_FULL_NAME_LEN) { push_warning_printf( (THD*) trx->mysql_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_TABLE_NAME, "InnoDB: Table Name or Database Name is too long"); DBUG_RETURN(ER_TABLE_NAME); } n_cols = form->s->fields; /* We pass 0 as the space id, and determine at a lower level the space id where to store the table */ table = dict_mem_table_create(table_name, 0, n_cols, flags); if (path_of_temp_table) { table->dir_path_of_temp_table = mem_heap_strdup(table->heap, path_of_temp_table); } for (i = 0; i < n_cols; i++) { field = form->field[i]; col_type = get_innobase_type_from_mysql_type(&unsigned_type, field); if (!col_type) { push_warning_printf( (THD*) trx->mysql_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_CANT_CREATE_TABLE, "Error creating table '%s' with " "column '%s'. Please check its " "column type and try to re-create " "the table with an appropriate " "column type.", table->name, (char*) field->field_name); goto err_col; } if (field->null_ptr) { nulls_allowed = 0; } else { nulls_allowed = DATA_NOT_NULL; } if (field->binary()) { binary_type = DATA_BINARY_TYPE; } else { binary_type = 0; } charset_no = 0; if (dtype_is_string_type(col_type)) { charset_no = (ulint)field->charset()->number; if (UNIV_UNLIKELY(charset_no >= 256)) { /* in data0type.h we assume that the number fits in one byte in prtype */ push_warning_printf( (THD*) trx->mysql_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_CANT_CREATE_TABLE, "In InnoDB, charset-collation codes" " must be below 256." " Unsupported code %lu.", (ulong) charset_no); DBUG_RETURN(ER_CANT_CREATE_TABLE); } } 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. */ 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; } } /* First check whether the column to be added has a system reserved name. */ if (dict_col_name_is_reserved(field->field_name)){ my_error(ER_WRONG_COLUMN_NAME, MYF(0), field->field_name); err_col: dict_mem_table_free(table); trx_commit_for_mysql(trx); error = DB_ERROR; goto error_ret; } dict_mem_table_add_col(table, table->heap, (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); } error = row_create_table_for_mysql(table, trx); if (error == DB_DUPLICATE_KEY) { char buf[100]; char* buf_end = innobase_convert_identifier( buf, sizeof buf - 1, table_name, strlen(table_name), trx->mysql_thd, TRUE); *buf_end = '\0'; my_error(ER_TABLE_EXISTS_ERROR, MYF(0), buf); } error_ret: error = convert_error_code_to_mysql(error, flags, NULL); DBUG_RETURN(error); } /*****************************************************************//** Creates an index in an InnoDB database. */ static int create_index( /*=========*/ trx_t* trx, /*!< in: InnoDB transaction handle */ TABLE* form, /*!< in: information on table columns and indexes */ ulint flags, /*!< in: InnoDB table flags */ const char* table_name, /*!< in: table name */ uint key_num) /*!< in: index number */ { Field* field; dict_index_t* index; int error; ulint n_fields; KEY* key; KEY_PART_INFO* key_part; ulint ind_type; ulint col_type; ulint prefix_len; ulint is_unsigned; ulint i; ulint j; ulint* field_lengths; DBUG_ENTER("create_index"); key = form->key_info + key_num; n_fields = key->key_parts; /* Assert that "GEN_CLUST_INDEX" cannot be used as non-primary index */ ut_a(innobase_strcasecmp(key->name, innobase_index_reserve_name) != 0); ind_type = 0; if (key_num == form->s->primary_key) { ind_type = ind_type | DICT_CLUSTERED; } if (key->flags & HA_NOSAME ) { ind_type = ind_type | DICT_UNIQUE; } /* We pass 0 as the space id, and determine at a lower level the space id where to store the table */ index = dict_mem_index_create(table_name, key->name, 0, ind_type, n_fields); field_lengths = (ulint*) my_malloc(sizeof(ulint) * n_fields, MYF(MY_FAE)); for (i = 0; i < n_fields; i++) { key_part = key->key_part + i; /* (The flag HA_PART_KEY_SEG denotes in MySQL a column prefix 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. */ field = NULL; for (j = 0; j < form->s->fields; j++) { field = form->field[j]; if (0 == innobase_strcasecmp( field->field_name, key_part->field->field_name)) { /* Found the corresponding column */ break; } } ut_a(j < form->s->fields); col_type = get_innobase_type_from_mysql_type( &is_unsigned, key_part->field); if (DATA_BLOB == col_type || (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)) { prefix_len = key_part->length; if (col_type == DATA_INT || 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; } } else { prefix_len = 0; } field_lengths[i] = key_part->length; dict_mem_index_add_field(index, (char*) key_part->field->field_name, prefix_len); } /* 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. */ error = row_create_index_for_mysql(index, trx, field_lengths); error = convert_error_code_to_mysql(error, flags, NULL); my_free(field_lengths, MYF(0)); DBUG_RETURN(error); } /*****************************************************************//** Creates an index to an InnoDB table when the user has defined no primary index. */ static int create_clustered_index_when_no_primary( /*===================================*/ trx_t* trx, /*!< in: InnoDB transaction handle */ ulint flags, /*!< in: InnoDB table flags */ const char* table_name) /*!< in: table name */ { dict_index_t* index; int error; /* We pass 0 as the space id, and determine at a lower level the space id where to store the table */ index = dict_mem_index_create(table_name, innobase_index_reserve_name, 0, DICT_CLUSTERED, 0); error = row_create_index_for_mysql(index, trx, NULL); error = convert_error_code_to_mysql(error, flags, NULL); return(error); } /*****************************************************************//** Return a display name for the row format @return row format name */ UNIV_INTERN const char* get_row_format_name( /*================*/ enum row_type row_format) /*!< in: Row Format */ { switch (row_format) { case ROW_TYPE_COMPACT: return("COMPACT"); case ROW_TYPE_COMPRESSED: return("COMPRESSED"); case ROW_TYPE_DYNAMIC: return("DYNAMIC"); case ROW_TYPE_REDUNDANT: return("REDUNDANT"); case ROW_TYPE_DEFAULT: return("DEFAULT"); case ROW_TYPE_FIXED: return("FIXED"); case ROW_TYPE_PAGE: case ROW_TYPE_NOT_USED: break; } return("NOT USED"); } /** If file-per-table is missing, issue warning and set ret false */ #define CHECK_ERROR_ROW_TYPE_NEEDS_FILE_PER_TABLE \ if (!srv_file_per_table) { \ push_warning_printf( \ thd, MYSQL_ERROR::WARN_LEVEL_WARN, \ ER_ILLEGAL_HA_CREATE_OPTION, \ "InnoDB: ROW_FORMAT=%s requires" \ " innodb_file_per_table.", \ get_row_format_name(row_format)); \ ret = FALSE; \ } /** If file-format is Antelope, issue warning and set ret false */ #define CHECK_ERROR_ROW_TYPE_NEEDS_GT_ANTELOPE \ if (srv_file_format < DICT_TF_FORMAT_ZIP) { \ push_warning_printf( \ thd, MYSQL_ERROR::WARN_LEVEL_WARN, \ ER_ILLEGAL_HA_CREATE_OPTION, \ "InnoDB: ROW_FORMAT=%s requires" \ " innodb_file_format > Antelope.", \ get_row_format_name(row_format)); \ ret = FALSE; \ } /*****************************************************************//** Validates the create options. We may build on this function in future. For now, it checks two specifiers: KEY_BLOCK_SIZE and ROW_FORMAT If innodb_strict_mode is not set then this function is a no-op @return TRUE if valid. */ static ibool create_options_are_valid( /*=====================*/ THD* thd, /*!< in: connection thread. */ TABLE* form, /*!< in: information on table columns and indexes */ HA_CREATE_INFO* create_info) /*!< in: create info. */ { ibool kbs_specified = FALSE; ibool ret = TRUE; enum row_type row_format = form->s->row_type; ut_ad(thd != NULL); /* If innodb_strict_mode is not set don't do any validation. */ if (!(THDVAR(thd, strict_mode))) { return(TRUE); } ut_ad(form != NULL); ut_ad(create_info != NULL); /* First check if a non-zero KEY_BLOCK_SIZE was specified. */ if (create_info->key_block_size) { kbs_specified = TRUE; switch (create_info->key_block_size) { case 1: case 2: case 4: case 8: case 16: /* Valid KEY_BLOCK_SIZE, check its dependencies. */ if (!srv_file_per_table) { push_warning( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: KEY_BLOCK_SIZE requires" " innodb_file_per_table."); ret = FALSE; } if (srv_file_format < DICT_TF_FORMAT_ZIP) { push_warning( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: KEY_BLOCK_SIZE requires" " innodb_file_format > Antelope."); ret = FALSE; } break; default: push_warning_printf( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: invalid KEY_BLOCK_SIZE = %lu." " Valid values are [1, 2, 4, 8, 16]", create_info->key_block_size); ret = FALSE; break; } } /* Check for a valid Innodb ROW_FORMAT specifier and other incompatibilities. */ switch (row_format) { case ROW_TYPE_COMPRESSED: CHECK_ERROR_ROW_TYPE_NEEDS_FILE_PER_TABLE; CHECK_ERROR_ROW_TYPE_NEEDS_GT_ANTELOPE; break; case ROW_TYPE_DYNAMIC: CHECK_ERROR_ROW_TYPE_NEEDS_FILE_PER_TABLE; CHECK_ERROR_ROW_TYPE_NEEDS_GT_ANTELOPE; /* fall through since dynamic also shuns KBS */ case ROW_TYPE_COMPACT: case ROW_TYPE_REDUNDANT: if (kbs_specified) { push_warning_printf( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: cannot specify ROW_FORMAT = %s" " with KEY_BLOCK_SIZE.", get_row_format_name(row_format)); ret = FALSE; } break; case ROW_TYPE_DEFAULT: break; case ROW_TYPE_FIXED: case ROW_TYPE_PAGE: case ROW_TYPE_NOT_USED: push_warning( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, \ "InnoDB: invalid ROW_FORMAT specifier."); ret = FALSE; break; } return(ret); } /*****************************************************************//** Update create_info. Used in SHOW CREATE TABLE et al. */ UNIV_INTERN void ha_innobase::update_create_info( /*============================*/ HA_CREATE_INFO* create_info) /*!< in/out: create info */ { if (!(create_info->used_fields & HA_CREATE_USED_AUTO)) { ha_innobase::info(HA_STATUS_AUTO); create_info->auto_increment_value = stats.auto_increment_value; } } /*****************************************************************//** Creates a new table to an InnoDB database. @return error number */ UNIV_INTERN int ha_innobase::create( /*================*/ const char* name, /*!< in: table name */ TABLE* form, /*!< in: information on table columns and indexes */ HA_CREATE_INFO* create_info) /*!< in: more information of the created table, contains also the create statement string */ { int error; dict_table_t* innobase_table; trx_t* parent_trx; trx_t* trx; int primary_key_no; uint i; char name2[FN_REFLEN]; char norm_name[FN_REFLEN]; THD* thd = ha_thd(); ib_int64_t auto_inc_value; ulint flags; /* Cache the value of innodb_file_format, in case it is modified by another thread while the table is being created. */ const ulint file_format = srv_file_format; const char* stmt; size_t stmt_len; enum row_type row_format; DBUG_ENTER("ha_innobase::create"); DBUG_ASSERT(thd != NULL); DBUG_ASSERT(create_info != NULL); #ifdef __WIN__ /* Names passed in from server are in two formats: 1. /: for normal table creation 2. full path: for temp table creation, or sym link When srv_file_per_table is on and mysqld_embedded is off, check for full path pattern, i.e. X:\dir\..., X is a driver letter, or \\dir1\dir2\..., UNC path returns error if it is in full path format, but not creating a temp. table. Currently InnoDB does not support symbolic link on Windows. */ if (srv_file_per_table && !mysqld_embedded && (!create_info->options & HA_LEX_CREATE_TMP_TABLE)) { if ((name[1] == ':') || (name[0] == '\\' && name[1] == '\\')) { sql_print_error("Cannot create table %s\n", name); DBUG_RETURN(HA_ERR_GENERIC); } } #endif if (form->s->fields > 1000) { /* The limit probably should be REC_MAX_N_FIELDS - 3 = 1020, but we play safe here */ DBUG_RETURN(HA_ERR_TO_BIG_ROW); } /* Get the transaction associated with the current thd, or create one if not yet created */ parent_trx = check_trx_exists(thd); /* 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(parent_trx); trx = innobase_trx_allocate(thd); if (lower_case_table_names) { srv_lower_case_table_names = TRUE; } else { srv_lower_case_table_names = FALSE; } strcpy(name2, name); normalize_table_name(norm_name, name2); /* Latch the InnoDB data dictionary exclusively so that no deadlocks or lock waits can happen in it during a table create operation. Drop table etc. do this latching in row0mysql.c. */ row_mysql_lock_data_dictionary(trx); /* Create the table definition in InnoDB */ flags = 0; /* Validate create options if innodb_strict_mode is set. */ if (!create_options_are_valid(thd, form, create_info)) { error = ER_ILLEGAL_HA_CREATE_OPTION; goto cleanup; } if (create_info->key_block_size) { /* Determine the page_zip.ssize corresponding to the requested page size (key_block_size) in kilobytes. */ ulint ssize, ksize; ulint key_block_size = create_info->key_block_size; /* Set 'flags' to the correct key_block_size. It will be zero if key_block_size is an invalid number.*/ for (ssize = ksize = 1; ssize <= DICT_TF_ZSSIZE_MAX; ssize++, ksize <<= 1) { if (key_block_size == ksize) { flags = ssize << DICT_TF_ZSSIZE_SHIFT | DICT_TF_COMPACT | DICT_TF_FORMAT_ZIP << DICT_TF_FORMAT_SHIFT; break; } } if (!srv_file_per_table) { push_warning( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: KEY_BLOCK_SIZE requires" " innodb_file_per_table."); flags = 0; } if (file_format < DICT_TF_FORMAT_ZIP) { push_warning( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: KEY_BLOCK_SIZE requires" " innodb_file_format > Antelope."); flags = 0; } if (!flags) { push_warning_printf( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: ignoring KEY_BLOCK_SIZE=%lu.", create_info->key_block_size); } } row_format = form->s->row_type; if (flags) { /* if ROW_FORMAT is set to default, automatically change it to COMPRESSED.*/ if (row_format == ROW_TYPE_DEFAULT) { row_format = ROW_TYPE_COMPRESSED; } else if (row_format != ROW_TYPE_COMPRESSED) { /* ROW_FORMAT other than COMPRESSED ignores KEY_BLOCK_SIZE. It does not make sense to reject conflicting KEY_BLOCK_SIZE and ROW_FORMAT, because such combinations can be obtained with ALTER TABLE anyway. */ push_warning_printf( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: ignoring KEY_BLOCK_SIZE=%lu" " unless ROW_FORMAT=COMPRESSED.", create_info->key_block_size); flags = 0; } } else { /* flags == 0 means no KEY_BLOCK_SIZE.*/ if (row_format == ROW_TYPE_COMPRESSED) { /* ROW_FORMAT=COMPRESSED without KEY_BLOCK_SIZE implies half the maximum KEY_BLOCK_SIZE. */ flags = (DICT_TF_ZSSIZE_MAX - 1) << DICT_TF_ZSSIZE_SHIFT | DICT_TF_COMPACT | DICT_TF_FORMAT_ZIP << DICT_TF_FORMAT_SHIFT; #if DICT_TF_ZSSIZE_MAX < 1 # error "DICT_TF_ZSSIZE_MAX < 1" #endif } } switch (row_format) { case ROW_TYPE_REDUNDANT: break; case ROW_TYPE_COMPRESSED: case ROW_TYPE_DYNAMIC: if (!srv_file_per_table) { push_warning_printf( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: ROW_FORMAT=%s requires" " innodb_file_per_table.", get_row_format_name(row_format)); } else if (file_format < DICT_TF_FORMAT_ZIP) { push_warning_printf( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: ROW_FORMAT=%s requires" " innodb_file_format > Antelope.", get_row_format_name(row_format)); } else { flags |= DICT_TF_COMPACT | (DICT_TF_FORMAT_ZIP << DICT_TF_FORMAT_SHIFT); break; } /* fall through */ case ROW_TYPE_NOT_USED: case ROW_TYPE_FIXED: case ROW_TYPE_PAGE: push_warning( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_ILLEGAL_HA_CREATE_OPTION, "InnoDB: assuming ROW_FORMAT=COMPACT."); case ROW_TYPE_DEFAULT: case ROW_TYPE_COMPACT: flags = DICT_TF_COMPACT; break; } /* Look for a primary key */ primary_key_no= (form->s->primary_key != MAX_KEY ? (int) form->s->primary_key : -1); /* Our function innobase_get_mysql_key_number_for_index assumes the primary key is always number 0, if it exists */ ut_a(primary_key_no == -1 || primary_key_no == 0); /* Check for name conflicts (with reserved name) for any user indices to be created. */ if (innobase_index_name_is_reserved(trx, form->key_info, form->s->keys)) { error = -1; goto cleanup; } if (create_info->options & HA_LEX_CREATE_TMP_TABLE) { flags |= DICT_TF2_TEMPORARY << DICT_TF2_SHIFT; } error = create_table_def(trx, form, norm_name, create_info->options & HA_LEX_CREATE_TMP_TABLE ? name2 : NULL, flags); if (error) { goto cleanup; } /* Create the keys */ if (form->s->keys == 0 || primary_key_no == -1) { /* Create an index which is used as the clustered index; order the rows by their row id which is internally generated by InnoDB */ error = create_clustered_index_when_no_primary( trx, flags, norm_name); if (error) { goto cleanup; } } if (primary_key_no != -1) { /* In InnoDB the clustered index must always be created first */ if ((error = create_index(trx, form, flags, norm_name, (uint) primary_key_no))) { goto cleanup; } } for (i = 0; i < form->s->keys; i++) { if (i != (uint) primary_key_no) { if ((error = create_index(trx, form, flags, norm_name, i))) { goto cleanup; } } } stmt = innobase_get_stmt(thd, &stmt_len); if (stmt) { error = row_table_add_foreign_constraints( trx, stmt, stmt_len, norm_name, create_info->options & HA_LEX_CREATE_TMP_TABLE); error = convert_error_code_to_mysql(error, flags, NULL); if (error) { goto cleanup; } } innobase_commit_low(trx); row_mysql_unlock_data_dictionary(trx); /* Flush the log to reduce probability that the .frm files and the InnoDB data dictionary get out-of-sync if the user runs with innodb_flush_log_at_trx_commit = 0 */ log_buffer_flush_to_disk(); innobase_table = dict_table_get(norm_name, FALSE); DBUG_ASSERT(innobase_table != 0); if (innobase_table) { /* We update the highest file format in the system table space, if this table has higher file format setting. */ trx_sys_file_format_max_upgrade( (const char**) &innobase_file_format_check, dict_table_get_format(innobase_table)); } /* Note: We can't call update_thd() as prebuilt will not be setup at this stage and so we use thd. */ /* We need to copy the AUTOINC value from the old table if this is an ALTER|OPTIMIZE TABLE or CREATE INDEX because CREATE INDEX does a table copy too. If query was one of : CREATE TABLE ...AUTO_INCREMENT = x; or ALTER TABLE...AUTO_INCREMENT = x; or OPTIMIZE TABLE t; or CREATE INDEX x on t(...); Find out a table definition from the dictionary and get the current value of the auto increment field. Set a new value to the auto increment field if the value is greater than the maximum value in the column. */ if (((create_info->used_fields & HA_CREATE_USED_AUTO) || thd_sql_command(thd) == SQLCOM_ALTER_TABLE || thd_sql_command(thd) == SQLCOM_OPTIMIZE || thd_sql_command(thd) == SQLCOM_CREATE_INDEX) && create_info->auto_increment_value > 0) { auto_inc_value = create_info->auto_increment_value; dict_table_autoinc_lock(innobase_table); dict_table_autoinc_initialize(innobase_table, auto_inc_value); dict_table_autoinc_unlock(innobase_table); } /* Tell the InnoDB server that there might be work for utility threads: */ srv_active_wake_master_thread(); trx_free_for_mysql(trx); DBUG_RETURN(0); cleanup: innobase_commit_low(trx); row_mysql_unlock_data_dictionary(trx); trx_free_for_mysql(trx); DBUG_RETURN(error); } /*****************************************************************//** Discards or imports an InnoDB tablespace. @return 0 == success, -1 == error */ UNIV_INTERN int ha_innobase::discard_or_import_tablespace( /*======================================*/ my_bool discard) /*!< in: TRUE if discard, else import */ { dict_table_t* dict_table; trx_t* trx; int err; DBUG_ENTER("ha_innobase::discard_or_import_tablespace"); ut_a(prebuilt->trx); ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); dict_table = prebuilt->table; trx = prebuilt->trx; if (discard) { err = row_discard_tablespace_for_mysql(dict_table->name, trx); } else { err = row_import_tablespace_for_mysql(dict_table->name, trx); } err = convert_error_code_to_mysql(err, dict_table->flags, NULL); DBUG_RETURN(err); } /*****************************************************************//** Deletes all rows of an InnoDB table. @return error number */ UNIV_INTERN int ha_innobase::delete_all_rows(void) /*==============================*/ { int error; DBUG_ENTER("ha_innobase::delete_all_rows"); /* Get the transaction associated with the current thd, or create one if not yet created, and update prebuilt->trx */ update_thd(ha_thd()); if (thd_sql_command(user_thd) != SQLCOM_TRUNCATE) { fallback: /* We only handle TRUNCATE TABLE t as a special case. DELETE FROM t will have to use ha_innobase::delete_row(), because DELETE is transactional while TRUNCATE is not. */ DBUG_RETURN(my_errno=HA_ERR_WRONG_COMMAND); } /* Truncate the table in InnoDB */ error = row_truncate_table_for_mysql(prebuilt->table, prebuilt->trx); if (error == DB_ERROR) { /* Cannot truncate; resort to ha_innobase::delete_row() */ goto fallback; } error = convert_error_code_to_mysql(error, prebuilt->table->flags, NULL); DBUG_RETURN(error); } /*****************************************************************//** Drops a table from an InnoDB database. Before calling this function, 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 operation inside InnoDB will remove all locks any user has on the table inside InnoDB. @return error number */ UNIV_INTERN int ha_innobase::delete_table( /*======================*/ const char* name) /*!< in: table name */ { ulint name_len; int error; trx_t* parent_trx; trx_t* trx; THD *thd = ha_thd(); char norm_name[1000]; DBUG_ENTER("ha_innobase::delete_table"); /* Strangely, MySQL passes the table name without the '.frm' extension, in contrast to ::create */ normalize_table_name(norm_name, name); if (IS_MAGIC_TABLE_AND_USER_DENIED_ACCESS(norm_name, thd)) { DBUG_RETURN(HA_ERR_GENERIC); } /* Get the transaction associated with the current thd, or create one if not yet created */ parent_trx = check_trx_exists(thd); /* 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(parent_trx); trx = innobase_trx_allocate(thd); if (lower_case_table_names) { srv_lower_case_table_names = TRUE; } else { srv_lower_case_table_names = FALSE; } name_len = strlen(name); ut_a(name_len < 1000); /* Drop the table in InnoDB */ error = row_drop_table_for_mysql(norm_name, trx, thd_sql_command(thd) == SQLCOM_DROP_DB); /* Flush the log to reduce probability that the .frm files and the InnoDB data dictionary get out-of-sync if the user runs with innodb_flush_log_at_trx_commit = 0 */ log_buffer_flush_to_disk(); /* Tell the InnoDB server that there might be work for utility threads: */ srv_active_wake_master_thread(); innobase_commit_low(trx); trx_free_for_mysql(trx); error = convert_error_code_to_mysql(error, 0, NULL); DBUG_RETURN(error); } /*****************************************************************//** Removes all tables in the named database inside InnoDB. */ static void innobase_drop_database( /*===================*/ handlerton *hton, /*!< in: handlerton of Innodb */ char* path) /*!< in: database path; inside InnoDB the name of the last directory in the path is used as the database name: for example, in 'mysql/data/test' the database name is 'test' */ { ulint len = 0; trx_t* trx; char* ptr; char* namebuf; THD* thd = current_thd; /* Get the transaction associated with the current thd, or create one if not yet created */ DBUG_ASSERT(hton == innodb_hton_ptr); /* In the Windows plugin, thd = current_thd is always NULL */ if (thd) { trx_t* parent_trx = check_trx_exists(thd); /* 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(parent_trx); } ptr = strend(path) - 2; while (ptr >= path && *ptr != '\\' && *ptr != '/') { ptr--; len++; } ptr++; namebuf = (char*) my_malloc((uint) len + 2, MYF(0)); memcpy(namebuf, ptr, len); namebuf[len] = '/'; namebuf[len + 1] = '\0'; #ifdef __WIN__ innobase_casedn_str(namebuf); #endif #if defined __WIN__ && !defined MYSQL_SERVER /* In the Windows plugin, thd = current_thd is always NULL */ trx = trx_allocate_for_mysql(); trx->mysql_thd = NULL; #else trx = innobase_trx_allocate(thd); #endif row_drop_database_for_mysql(namebuf, trx); my_free(namebuf, MYF(0)); /* Flush the log to reduce probability that the .frm files and the InnoDB data dictionary get out-of-sync if the user runs with innodb_flush_log_at_trx_commit = 0 */ log_buffer_flush_to_disk(); /* Tell the InnoDB server that there might be work for utility threads: */ srv_active_wake_master_thread(); innobase_commit_low(trx); trx_free_for_mysql(trx); } /*********************************************************************//** Renames an InnoDB table. @return 0 or error code */ static int innobase_rename_table( /*==================*/ trx_t* trx, /*!< in: transaction */ const char* from, /*!< in: old name of the table */ const char* to, /*!< in: new name of the table */ ibool lock_and_commit) /*!< in: TRUE=lock data dictionary and commit */ { int error; char* norm_to; char* norm_from; if (lower_case_table_names) { srv_lower_case_table_names = TRUE; } else { srv_lower_case_table_names = FALSE; } // Magic number 64 arbitrary norm_to = (char*) my_malloc(strlen(to) + 64, MYF(0)); norm_from = (char*) my_malloc(strlen(from) + 64, MYF(0)); normalize_table_name(norm_to, to); normalize_table_name(norm_from, from); /* Serialize data dictionary operations with dictionary mutex: no deadlocks can occur then in these operations */ if (lock_and_commit) { row_mysql_lock_data_dictionary(trx); } error = row_rename_table_for_mysql( norm_from, norm_to, trx, lock_and_commit); if (error != DB_SUCCESS) { FILE* ef = dict_foreign_err_file; fputs("InnoDB: Renaming table ", ef); ut_print_name(ef, trx, TRUE, norm_from); fputs(" to ", ef); ut_print_name(ef, trx, TRUE, norm_to); fputs(" failed!\n", ef); } if (lock_and_commit) { row_mysql_unlock_data_dictionary(trx); /* Flush the log to reduce probability that the .frm files and the InnoDB data dictionary get out-of-sync if the user runs with innodb_flush_log_at_trx_commit = 0 */ log_buffer_flush_to_disk(); } my_free(norm_to, MYF(0)); my_free(norm_from, MYF(0)); return error; } /*********************************************************************//** Renames an InnoDB table. @return 0 or error code */ UNIV_INTERN int ha_innobase::rename_table( /*======================*/ const char* from, /*!< in: old name of the table */ const char* to) /*!< in: new name of the table */ { trx_t* trx; int error; trx_t* parent_trx; THD* thd = ha_thd(); DBUG_ENTER("ha_innobase::rename_table"); /* Get the transaction associated with the current thd, or create one if not yet created */ parent_trx = check_trx_exists(thd); /* 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(parent_trx); trx = innobase_trx_allocate(thd); error = innobase_rename_table(trx, from, to, TRUE); /* Tell the InnoDB server that there might be work for utility threads: */ srv_active_wake_master_thread(); innobase_commit_low(trx); trx_free_for_mysql(trx); /* Add a special case to handle the Duplicated Key error and return DB_ERROR instead. This is to avoid a possible SIGSEGV error from mysql error handling code. Currently, mysql handles the Duplicated Key error by re-entering the storage layer and getting dup key info by calling get_dup_key(). This operation requires a valid table handle ('row_prebuilt_t' structure) which could no longer be available in the error handling stage. The suggested solution is to report a 'table exists' error message (since the dup key error here is due to an existing table whose name is the one we are trying to rename to) and return the generic error code. */ if (error == (int) DB_DUPLICATE_KEY) { my_error(ER_TABLE_EXISTS_ERROR, MYF(0), to); error = DB_ERROR; } error = convert_error_code_to_mysql(error, 0, NULL); DBUG_RETURN(error); } /*********************************************************************//** Estimates the number of index records in a range. @return estimated number of rows */ UNIV_INTERN ha_rows ha_innobase::records_in_range( /*==========================*/ uint keynr, /*!< in: index number */ key_range *min_key, /*!< in: start key value of the range, may also be 0 */ key_range *max_key) /*!< in: range end key val, may also be 0 */ { KEY* key; dict_index_t* index; uchar* key_val_buff2 = (uchar*) my_malloc( table->s->reclength + table->s->max_key_length + 100, MYF(MY_FAE)); ulint buff2_len = table->s->reclength + table->s->max_key_length + 100; dtuple_t* range_start; dtuple_t* range_end; ib_int64_t n_rows; ulint mode1; ulint mode2; mem_heap_t* heap; DBUG_ENTER("records_in_range"); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); prebuilt->trx->op_info = (char*)"estimating records in index range"; /* 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); active_index = keynr; key = table->key_info + active_index; index = innobase_get_index(keynr); /* There exists possibility of not being able to find requested index due to inconsistency between MySQL and InoDB dictionary info. Necessary message should have been printed in innobase_get_index() */ if (UNIV_UNLIKELY(!index)) { n_rows = HA_POS_ERROR; goto func_exit; } if (UNIV_UNLIKELY(!row_merge_is_index_usable(prebuilt->trx, index))) { n_rows = HA_ERR_TABLE_DEF_CHANGED; goto func_exit; } heap = mem_heap_create(2 * (key->key_parts * sizeof(dfield_t) + sizeof(dtuple_t))); range_start = dtuple_create(heap, key->key_parts); dict_index_copy_types(range_start, index, key->key_parts); range_end = dtuple_create(heap, key->key_parts); dict_index_copy_types(range_end, index, key->key_parts); row_sel_convert_mysql_key_to_innobase( range_start, (byte*) key_val_buff, (ulint)upd_and_key_val_buff_len, index, (byte*) (min_key ? min_key->key : (const uchar*) 0), (ulint) (min_key ? min_key->length : 0), prebuilt->trx); row_sel_convert_mysql_key_to_innobase( range_end, (byte*) key_val_buff2, buff2_len, index, (byte*) (max_key ? max_key->key : (const uchar*) 0), (ulint) (max_key ? max_key->length : 0), prebuilt->trx); mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag : HA_READ_KEY_EXACT); mode2 = convert_search_mode_to_innobase(max_key ? max_key->flag : HA_READ_KEY_EXACT); if (mode1 != PAGE_CUR_UNSUPP && mode2 != PAGE_CUR_UNSUPP) { n_rows = btr_estimate_n_rows_in_range(index, range_start, mode1, range_end, mode2); } else { n_rows = HA_POS_ERROR; } mem_heap_free(heap); func_exit: my_free(key_val_buff2, MYF(0)); prebuilt->trx->op_info = (char*)""; /* The MySQL optimizer seems to believe an estimate of 0 rows is always accurate and may return the result 'Empty set' based on that. The accuracy is not guaranteed, and even if it were, for a locking read we should anyway perform the search to set the next-key lock. Add 1 to the value to make sure MySQL does not make the assumption! */ if (n_rows == 0) { n_rows = 1; } DBUG_RETURN((ha_rows) n_rows); } /*********************************************************************//** Gives an UPPER BOUND to the number of rows in a table. This is used in filesort.cc. @return upper bound of rows */ UNIV_INTERN ha_rows ha_innobase::estimate_rows_upper_bound(void) /*======================================*/ { dict_index_t* index; ulonglong estimate; ulonglong local_data_file_length; ulint stat_n_leaf_pages; DBUG_ENTER("estimate_rows_upper_bound"); /* 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(ha_thd()); prebuilt->trx->op_info = (char*) "calculating upper bound for table rows"; /* 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); index = dict_table_get_first_index(prebuilt->table); stat_n_leaf_pages = index->stat_n_leaf_pages; ut_a(stat_n_leaf_pages > 0); local_data_file_length = ((ulonglong) stat_n_leaf_pages) * UNIV_PAGE_SIZE; /* Calculate a minimum length for a clustered index record and from that an upper bound for the number of rows. Since we only calculate 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. */ estimate = 2 * local_data_file_length / dict_index_calc_min_rec_len(index); prebuilt->trx->op_info = (char*)""; DBUG_RETURN((ha_rows) estimate); } /*********************************************************************//** 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. @return estimated time measured in disk seeks */ UNIV_INTERN double ha_innobase::scan_time() /*====================*/ { /* Since MySQL seems to favor table scans too much over index searches, we pretend that a sequential read takes the same time as a random disk read, that is, we do not divide the following by 10, which would be physically realistic. */ return((double) (prebuilt->table->stat_clustered_index_size)); } /******************************************************************//** Calculate the time it takes to read a set of ranges through an index This enables us to optimise reads for clustered indexes. @return estimated time measured in disk seeks */ UNIV_INTERN double ha_innobase::read_time( /*===================*/ uint index, /*!< in: key number */ uint ranges, /*!< in: how many ranges */ ha_rows rows) /*!< in: estimated number of rows in the ranges */ { ha_rows total_rows; double time_for_scan; if (index != table->s->primary_key) { /* Not clustered */ return(handler::read_time(index, ranges, rows)); } if (rows <= 2) { return((double) rows); } /* Assume that the read time is proportional to the scan time for all rows + at most one seek per range. */ time_for_scan = scan_time(); if ((total_rows = estimate_rows_upper_bound()) < rows) { return(time_for_scan); } return(ranges + (double) rows / (double) total_rows * time_for_scan); } /*********************************************************************//** Calculates the key number used inside MySQL for an Innobase index. We will first check the "index translation table" for a match of the index to get the index number. If there does not exist an "index translation table", or not able to find the index in the translation table, then we will fall back to the traditional way of looping through dict_index_t list to find a match. In this case, we have to take into account if we generated a default clustered index for the table @return the key number used inside MySQL */ static unsigned int innobase_get_mysql_key_number_for_index( /*====================================*/ INNOBASE_SHARE* share, /*!< in: share structure for index translation table. */ const TABLE* table, /*!< in: table in MySQL data dictionary */ dict_table_t* ib_table,/*!< in: table in Innodb data dictionary */ const dict_index_t* index) /*!< in: index */ { const dict_index_t* ind; unsigned int i; ut_ad(index); ut_ad(ib_table); ut_ad(table); ut_ad(share); /* If index does not belong to the table of share structure. Search index->table instead */ if (index->table != ib_table) { i = 0; ind = dict_table_get_first_index(index->table); while (index != ind) { ind = dict_table_get_next_index(ind); i++; } if (row_table_got_default_clust_index(index->table)) { ut_a(i > 0); i--; } return(i); } /* If index translation table exists, we will first check the index through index translation table for a match. */ if (share->idx_trans_tbl.index_mapping) { for (i = 0; i < share->idx_trans_tbl.index_count; i++) { if (share->idx_trans_tbl.index_mapping[i] == index) { return(i); } } /* Print an error message if we cannot find the index ** in the "index translation table". */ sql_print_error("Cannot find index %s in InnoDB index " "translation table.", index->name); } /* If we do not have an "index translation table", or not able to find the index in the translation table, we'll directly find matching index in the dict_index_t list */ for (i = 0; i < table->s->keys; i++) { ind = dict_table_get_index_on_name( ib_table, table->key_info[i].name); if (index == ind) { return(i); } } sql_print_error("Cannot find matching index number for index %s " "in InnoDB index list.", index->name); return(0); } /*********************************************************************//** Calculate Record Per Key value. Need to exclude the NULL value if innodb_stats_method is set to "nulls_ignored" @return estimated record per key value */ static ha_rows innodb_rec_per_key( /*===============*/ dict_index_t* index, /*!< in: dict_index_t structure */ ulint i, /*!< in: the column we are calculating rec per key */ ha_rows records) /*!< in: estimated total records */ { ha_rows rec_per_key; ut_ad(i < dict_index_get_n_unique(index)); /* Note the stat_n_diff_key_vals[] stores the diff value with n-prefix indexing, so it is always stat_n_diff_key_vals[i + 1] */ if (index->stat_n_diff_key_vals[i + 1] == 0) { rec_per_key = records; } else if (srv_innodb_stats_method == SRV_STATS_NULLS_IGNORED) { ib_int64_t num_null; /* Number of rows with NULL value in this field */ num_null = records - index->stat_n_non_null_key_vals[i]; /* In theory, index->stat_n_non_null_key_vals[i] should always be less than the number of records. Since this is statistics value, the value could have slight discrepancy. But we will make sure the number of null values is not a negative number. */ num_null = (num_null < 0) ? 0 : num_null; /* If the number of NULL values is the same as or large than that of the distinct values, we could consider that the table consists mostly of NULL value. Set rec_per_key to 1. */ if (index->stat_n_diff_key_vals[i + 1] <= num_null) { rec_per_key = 1; } else { /* Need to exclude rows with NULL values from rec_per_key calculation */ rec_per_key = (ha_rows)( (records - num_null) / (index->stat_n_diff_key_vals[i + 1] - num_null)); } } else { rec_per_key = (ha_rows) (records / index->stat_n_diff_key_vals[i + 1]); } return(rec_per_key); } /*********************************************************************//** Returns statistics information of the table to the MySQL interpreter, in various fields of the handle object. */ UNIV_INTERN int ha_innobase::info_low( /*==================*/ uint flag, /*!< in: what information MySQL requests */ bool called_from_analyze) /* in: TRUE if called from ::analyze() */ { dict_table_t* ib_table; dict_index_t* index; ha_rows rec_per_key; ib_int64_t n_rows; char path[FN_REFLEN]; os_file_stat_t stat_info; DBUG_ENTER("info"); /* If we are forcing recovery at a high level, we will suppress statistics calculation on tables, because that may crash the server if an index is badly corrupted. */ /* 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(ha_thd()); /* In case MySQL calls this in the middle of a SELECT query, release possible adaptive hash latch to avoid deadlocks of threads */ prebuilt->trx->op_info = (char*)"returning various info to MySQL"; trx_search_latch_release_if_reserved(prebuilt->trx); ib_table = prebuilt->table; if (flag & HA_STATUS_TIME) { if (called_from_analyze || innobase_stats_on_metadata) { /* In sql_show we call with this flag: update then statistics so that they are up-to-date */ prebuilt->trx->op_info = "updating table statistics"; dict_update_statistics(ib_table, FALSE /* update even if stats are initialized */); prebuilt->trx->op_info = "returning various info to MySQL"; } my_snprintf(path, sizeof(path), "%s/%s%s", mysql_data_home, ib_table->name, reg_ext); unpack_filename(path,path); /* Note that we do not know the access time of the table, nor the CHECK TABLE time, nor the UPDATE or INSERT time. */ if (os_file_get_status(path,&stat_info)) { stats.create_time = (ulong) stat_info.ctime; } } if (flag & HA_STATUS_VARIABLE) { dict_table_stats_lock(ib_table, RW_S_LATCH); 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 HA_STATUS_TIME flag set, while the left join optimizer does not 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++; } /* Fix bug#40386: Not flushing query cache after truncate. n_rows can not be 0 unless the table is empty, set to 1 instead. The original problem of bug#29507 is actually fixed in the server code. */ if (thd_sql_command(user_thd) == SQLCOM_TRUNCATE) { n_rows = 1; /* We need to reset the prebuilt value too, otherwise checks for values greater than the last value written to the table will fail and the autoinc counter will not be updated. This will force write_row() into attempting an update of the table's AUTOINC counter. */ prebuilt->autoinc_last_value = 0; } stats.records = (ha_rows)n_rows; stats.deleted = 0; stats.data_file_length = ((ulonglong) ib_table->stat_clustered_index_size) * UNIV_PAGE_SIZE; stats.index_file_length = ((ulonglong) ib_table->stat_sum_of_other_index_sizes) * UNIV_PAGE_SIZE; dict_table_stats_unlock(ib_table, RW_S_LATCH); /* Since fsp_get_available_space_in_free_extents() is acquiring latches inside InnoDB, we do not call it if we are asked by MySQL to avoid locking. Another reason to avoid the call is that it uses quite a lot of CPU. See Bug#38185. */ if (flag & HA_STATUS_NO_LOCK) { /* We do not update delete_length if no locking is requested so the "old" value can remain. delete_length is initialized to 0 in the ha_statistics' constructor. */ } else if (UNIV_UNLIKELY (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE)) { /* Avoid accessing the tablespace if innodb_crash_recovery is set to a high value. */ stats.delete_length = 0; } else { ullint avail_space; avail_space = fsp_get_available_space_in_free_extents( ib_table->space); if (avail_space == ULLINT_UNDEFINED) { THD* thd; thd = ha_thd(); push_warning_printf( thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_CANT_GET_STAT, "InnoDB: Trying to get the free " "space for table %s but its " "tablespace has been discarded or " "the .ibd file is missing. Setting " "the free space to zero.", ib_table->name); stats.delete_length = 0; } else { stats.delete_length = avail_space * 1024; } } stats.check_time = 0; stats.mrr_length_per_rec= ref_length + 8; // 8 = max(sizeof(void *)); if (stats.records == 0) { stats.mean_rec_length = 0; } else { stats.mean_rec_length = (ulong) (stats.data_file_length / stats.records); } } if (flag & HA_STATUS_CONST) { ulong i; /* Verify the number of index in InnoDB and MySQL matches up. If prebuilt->clust_index_was_generated holds, InnoDB defines GEN_CLUST_INDEX internally */ ulint num_innodb_index = UT_LIST_GET_LEN(ib_table->indexes) - prebuilt->clust_index_was_generated; if (table->s->keys != num_innodb_index) { sql_print_error("Table %s contains %lu " "indexes inside InnoDB, which " "is different from the number of " "indexes %u defined in the MySQL ", ib_table->name, num_innodb_index, table->s->keys); } dict_table_stats_lock(ib_table, RW_S_LATCH); for (i = 0; i < table->s->keys; i++) { ulong j; /* We could get index quickly through internal index mapping with the index translation table. The identity of index (match up index name with that of table->key_info[i]) is already verified in innobase_get_index(). */ index = innobase_get_index(i); if (index == NULL) { sql_print_error("Table %s contains fewer " "indexes inside InnoDB than " "are defined in the MySQL " ".frm file. Have you mixed up " ".frm files from different " "installations? See " REFMAN "innodb-troubleshooting.html\n", ib_table->name); break; } for (j = 0; j < table->key_info[i].key_parts; j++) { if (j + 1 > index->n_uniq) { 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 " REFMAN "innodb-troubleshooting.html\n", index->name, ib_table->name, (unsigned long) index->n_uniq, j + 1); break; } rec_per_key = innodb_rec_per_key( index, j, stats.records); /* 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; if (rec_per_key == 0) { rec_per_key = 1; } table->key_info[i].rec_per_key[j]= rec_per_key >= ~(ulong) 0 ? ~(ulong) 0 : (ulong) rec_per_key; } } dict_table_stats_unlock(ib_table, RW_S_LATCH); } if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) { goto func_exit; } if (flag & HA_STATUS_ERRKEY) { const dict_index_t* err_index; ut_a(prebuilt->trx); ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N); err_index = trx_get_error_info(prebuilt->trx); if (err_index) { errkey = innobase_get_mysql_key_number_for_index( share, table, ib_table, err_index); } else { errkey = (unsigned int) prebuilt->trx->error_key_num; } } if ((flag & HA_STATUS_AUTO) && table->found_next_number_field) { stats.auto_increment_value = innobase_peek_autoinc(); } func_exit: prebuilt->trx->op_info = (char*)""; DBUG_RETURN(0); } /*********************************************************************//** Returns statistics information of the table to the MySQL interpreter, in various fields of the handle object. */ UNIV_INTERN int ha_innobase::info( /*==============*/ uint flag) /*!< in: what information MySQL requests */ { return(info_low(flag, false /* not called from analyze */)); } /**********************************************************************//** Updates index cardinalities of the table, based on 8 random dives into each index tree. This does NOT calculate exact statistics on the table. @return returns always 0 (success) */ UNIV_INTERN int ha_innobase::analyze( /*=================*/ THD* thd, /*!< in: connection thread handle */ HA_CHECK_OPT* check_opt) /*!< in: currently ignored */ { /* Simply call ::info() with all the flags */ info_low(HA_STATUS_TIME | HA_STATUS_CONST | HA_STATUS_VARIABLE, true /* called from analyze */); return(0); } /**********************************************************************//** This is mapped to "ALTER TABLE tablename ENGINE=InnoDB", which rebuilds the table in MySQL. */ UNIV_INTERN int ha_innobase::optimize( /*==================*/ THD* thd, /*!< in: connection thread handle */ HA_CHECK_OPT* check_opt) /*!< in: currently ignored */ { return(HA_ADMIN_TRY_ALTER); } /*******************************************************************//** 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. @return HA_ADMIN_CORRUPT or HA_ADMIN_OK */ UNIV_INTERN int ha_innobase::check( /*===============*/ THD* thd, /*!< in: user thread handle */ HA_CHECK_OPT* check_opt) /*!< in: check options, currently ignored */ { dict_index_t* index; ulint n_rows; ulint n_rows_in_table = ULINT_UNDEFINED; ibool is_ok = TRUE; ulint old_isolation_level; DBUG_ENTER("ha_innobase::check"); DBUG_ASSERT(thd == ha_thd()); ut_a(prebuilt->trx); ut_a(prebuilt->trx->magic_n == TRX_MAGIC_N); ut_a(prebuilt->trx == thd_to_trx(thd)); 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); } if (prebuilt->table->ibd_file_missing) { sql_print_error("InnoDB: Error:\n" "InnoDB: MySQL is trying to use a table handle" " but the .ibd file for\n" "InnoDB: table %s does not exist.\n" "InnoDB: Have you deleted the .ibd file" " from the database directory under\n" "InnoDB: the MySQL datadir, or have you" " used DISCARD TABLESPACE?\n" "InnoDB: Please refer to\n" "InnoDB: " REFMAN "innodb-troubleshooting.html\n" "InnoDB: how you can resolve the problem.\n", prebuilt->table->name); DBUG_RETURN(HA_ADMIN_CORRUPT); } prebuilt->trx->op_info = "checking table"; old_isolation_level = prebuilt->trx->isolation_level; /* We must run the index record counts at an isolation level >= READ COMMITTED, because a dirty read can see a wrong number of records in some index; to play safe, we use always REPEATABLE READ here */ prebuilt->trx->isolation_level = TRX_ISO_REPEATABLE_READ; /* Enlarge the fatal lock wait timeout during CHECK TABLE. */ mutex_enter(&kernel_mutex); srv_fatal_semaphore_wait_threshold += 7200; /* 2 hours */ mutex_exit(&kernel_mutex); for (index = dict_table_get_first_index(prebuilt->table); index != NULL; index = dict_table_get_next_index(index)) { #if 0 fputs("Validating index ", stderr); ut_print_name(stderr, trx, FALSE, index->name); putc('\n', stderr); #endif if (!btr_validate_index(index, prebuilt->trx)) { is_ok = FALSE; push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_NOT_KEYFILE, "InnoDB: The B-tree of" " index '%-.200s' is corrupted.", index->name); continue; } /* Instead of invoking change_active_index(), set up a dummy template for non-locking reads, disabling access to the clustered index. */ prebuilt->index = index; prebuilt->index_usable = row_merge_is_index_usable( prebuilt->trx, prebuilt->index); if (UNIV_UNLIKELY(!prebuilt->index_usable)) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, HA_ERR_TABLE_DEF_CHANGED, "InnoDB: Insufficient history for" " index '%-.200s'", index->name); continue; } prebuilt->sql_stat_start = TRUE; prebuilt->template_type = ROW_MYSQL_DUMMY_TEMPLATE; prebuilt->n_template = 0; prebuilt->need_to_access_clustered = FALSE; dtuple_set_n_fields(prebuilt->search_tuple, 0); prebuilt->select_lock_type = LOCK_NONE; if (!row_check_index_for_mysql(prebuilt, index, &n_rows)) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_NOT_KEYFILE, "InnoDB: The B-tree of" " index '%-.200s' is corrupted.", index->name); is_ok = FALSE; } if (thd_killed(user_thd)) { break; } #if 0 fprintf(stderr, "%lu entries in index %s\n", n_rows, index->name); #endif if (index == dict_table_get_first_index(prebuilt->table)) { n_rows_in_table = n_rows; } else if (n_rows != n_rows_in_table) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_NOT_KEYFILE, "InnoDB: Index '%-.200s'" " contains %lu entries," " should be %lu.", index->name, (ulong) n_rows, (ulong) n_rows_in_table); is_ok = FALSE; } } /* Restore the original isolation level */ prebuilt->trx->isolation_level = old_isolation_level; /* We validate also the whole adaptive hash index for all tables at every CHECK TABLE */ if (!btr_search_validate()) { push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_NOT_KEYFILE, "InnoDB: The adaptive hash index is corrupted."); is_ok = FALSE; } /* Restore the fatal lock wait timeout after CHECK TABLE. */ mutex_enter(&kernel_mutex); srv_fatal_semaphore_wait_threshold -= 7200; /* 2 hours */ mutex_exit(&kernel_mutex); prebuilt->trx->op_info = ""; if (thd_killed(user_thd)) { my_error(ER_QUERY_INTERRUPTED, MYF(0)); } DBUG_RETURN(is_ok ? HA_ADMIN_OK : HA_ADMIN_CORRUPT); } /*************************************************************//** 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. @return table comment + InnoDB free space + info on foreign keys */ UNIV_INTERN char* ha_innobase::update_table_comment( /*==============================*/ const char* comment)/*!< in: table comment defined by user */ { uint length = (uint) strlen(comment); char* str; long flen; /* 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. */ if (length > 64000 - 3) { return((char*)comment); /* string too long */ } update_thd(ha_thd()); prebuilt->trx->op_info = (char*)"returning table comment"; /* 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); str = NULL; /* output the data to a temporary file */ mutex_enter(&srv_dict_tmpfile_mutex); rewind(srv_dict_tmpfile); fprintf(srv_dict_tmpfile, "InnoDB free: %llu kB", fsp_get_available_space_in_free_extents( prebuilt->table->space)); dict_print_info_on_foreign_keys(FALSE, srv_dict_tmpfile, prebuilt->trx, prebuilt->table); flen = ftell(srv_dict_tmpfile); if (flen < 0) { flen = 0; } else if (length + flen + 3 > 64000) { flen = 64000 - 3 - length; } /* allocate buffer for the full string, and read the contents of the temporary file */ str = (char*) my_malloc(length + flen + 3, MYF(0)); if (str) { char* pos = str + length; if (length) { memcpy(str, comment, length); *pos++ = ';'; *pos++ = ' '; } rewind(srv_dict_tmpfile); flen = (uint) fread(pos, 1, flen, srv_dict_tmpfile); pos[flen] = 0; } mutex_exit(&srv_dict_tmpfile_mutex); prebuilt->trx->op_info = (char*)""; return(str ? str : (char*) comment); } /*******************************************************************//** Gets the foreign key create info for a table stored in InnoDB. @return own: character string in the form which can be inserted to the CREATE TABLE statement, MUST be freed with ha_innobase::free_foreign_key_create_info */ UNIV_INTERN char* ha_innobase::get_foreign_key_create_info(void) /*==========================================*/ { char* str = 0; long flen; ut_a(prebuilt != NULL); /* 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(ha_thd()); prebuilt->trx->op_info = (char*)"getting info on foreign keys"; /* 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); mutex_enter(&srv_dict_tmpfile_mutex); rewind(srv_dict_tmpfile); /* output the data to a temporary file */ dict_print_info_on_foreign_keys(TRUE, srv_dict_tmpfile, prebuilt->trx, prebuilt->table); prebuilt->trx->op_info = (char*)""; flen = ftell(srv_dict_tmpfile); if (flen < 0) { flen = 0; } /* allocate buffer for the string, and read the contents of the temporary file */ str = (char*) my_malloc(flen + 1, MYF(0)); if (str) { rewind(srv_dict_tmpfile); flen = (uint) fread(str, 1, flen, srv_dict_tmpfile); str[flen] = 0; } mutex_exit(&srv_dict_tmpfile_mutex); return(str); } UNIV_INTERN int ha_innobase::get_foreign_key_list(THD *thd, List *f_key_list) { dict_foreign_t* foreign; DBUG_ENTER("get_foreign_key_list"); ut_a(prebuilt != NULL); update_thd(ha_thd()); prebuilt->trx->op_info = (char*)"getting list of foreign keys"; trx_search_latch_release_if_reserved(prebuilt->trx); mutex_enter(&(dict_sys->mutex)); foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list); while (foreign != NULL) { uint i; FOREIGN_KEY_INFO f_key_info; LEX_STRING *name= 0; uint ulen; char uname[NAME_LEN+1]; /* Unencoded name */ char db_name[NAME_LEN+1]; const char *tmp_buff; tmp_buff= foreign->id; i= 0; while (tmp_buff[i] != '/') i++; tmp_buff+= i + 1; f_key_info.forein_id = thd_make_lex_string(thd, 0, tmp_buff, (uint) strlen(tmp_buff), 1); tmp_buff= foreign->referenced_table_name; /* Database name */ i= 0; while (tmp_buff[i] != '/') { db_name[i]= tmp_buff[i]; i++; } db_name[i]= 0; ulen= filename_to_tablename(db_name, uname, sizeof(uname)); f_key_info.referenced_db = thd_make_lex_string(thd, 0, uname, ulen, 1); /* Table name */ tmp_buff+= i + 1; ulen= filename_to_tablename(tmp_buff, uname, sizeof(uname)); f_key_info.referenced_table = thd_make_lex_string(thd, 0, uname, ulen, 1); for (i= 0;;) { tmp_buff= foreign->foreign_col_names[i]; name = thd_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 = thd_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; } 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 = thd_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 = thd_make_lex_string( thd, f_key_info.update_method, tmp_buff, length, 1); if (foreign->referenced_index && foreign->referenced_index->name) { f_key_info.referenced_key_name = thd_make_lex_string( thd, f_key_info.referenced_key_name, foreign->referenced_index->name, (uint) strlen(foreign->referenced_index->name), 1); } else f_key_info.referenced_key_name= 0; FOREIGN_KEY_INFO *pf_key_info = (FOREIGN_KEY_INFO *) thd_memdup(thd, &f_key_info, sizeof(FOREIGN_KEY_INFO)); f_key_list->push_back(pf_key_info); foreign = UT_LIST_GET_NEXT(foreign_list, foreign); } mutex_exit(&(dict_sys->mutex)); prebuilt->trx->op_info = (char*)""; DBUG_RETURN(0); } /*****************************************************************//** 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). @return TRUE if can switch engines */ UNIV_INTERN bool ha_innobase::can_switch_engines(void) /*=================================*/ { bool can_switch; DBUG_ENTER("ha_innobase::can_switch_engines"); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); 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); } /*******************************************************************//** 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. @return > 0 if referenced by a FOREIGN KEY */ UNIV_INTERN uint ha_innobase::referenced_by_foreign_key(void) /*========================================*/ { if (dict_table_is_referenced_by_foreign_key(prebuilt->table)) { return(1); } return(0); } /*******************************************************************//** Frees the foreign key create info for a table stored in InnoDB, if it is non-NULL. */ UNIV_INTERN void ha_innobase::free_foreign_key_create_info( /*======================================*/ char* str) /*!< in, own: create info string to free */ { if (str) { my_free(str, MYF(0)); } } /*******************************************************************//** Tells something additional to the handler about how to do things. @return 0 or error number */ UNIV_INTERN int ha_innobase::extra( /*===============*/ enum ha_extra_function operation) /*!< in: HA_EXTRA_FLUSH or some other flag */ { /* Warning: since it is not sure that MySQL calls external_lock before calling this function, the trx field in prebuilt can be obsolete! */ switch (operation) { case HA_EXTRA_FLUSH: if (prebuilt->blob_heap) { row_mysql_prebuilt_free_blob_heap(prebuilt); } break; case HA_EXTRA_RESET_STATE: reset_template(prebuilt); break; case HA_EXTRA_NO_KEYREAD: prebuilt->read_just_key = 0; break; case HA_EXTRA_KEYREAD: prebuilt->read_just_key = 1; break; case HA_EXTRA_KEYREAD_PRESERVE_FIELDS: prebuilt->keep_other_fields_on_keyread = 1; break; /* IMPORTANT: prebuilt->trx can be obsolete in this method, because it is not sure that MySQL calls external_lock before this method with the parameters below. We must not invoke update_thd() either, because the calling threads may change. CAREFUL HERE, OR MEMORY CORRUPTION MAY OCCUR! */ case HA_EXTRA_IGNORE_DUP_KEY: thd_to_trx(ha_thd())->duplicates |= TRX_DUP_IGNORE; break; case HA_EXTRA_WRITE_CAN_REPLACE: thd_to_trx(ha_thd())->duplicates |= TRX_DUP_REPLACE; break; case HA_EXTRA_WRITE_CANNOT_REPLACE: thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_REPLACE; break; case HA_EXTRA_NO_IGNORE_DUP_KEY: thd_to_trx(ha_thd())->duplicates &= ~(TRX_DUP_IGNORE | TRX_DUP_REPLACE); break; default:/* Do nothing */ ; } return(0); } UNIV_INTERN int ha_innobase::reset() { if (prebuilt->blob_heap) { row_mysql_prebuilt_free_blob_heap(prebuilt); } reset_template(prebuilt); /* TODO: This should really be reset in reset_template() but for now it's safer to do it explicitly here. */ /* This is a statement level counter. */ prebuilt->autoinc_last_value = 0; return(0); } /******************************************************************//** 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 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(thd) holds in store_lock()) before executing the procedure. @return 0 or error code */ UNIV_INTERN int ha_innobase::start_stmt( /*====================*/ THD* thd, /*!< in: handle to the user thread */ thr_lock_type lock_type) { trx_t* trx; update_thd(thd); trx = prebuilt->trx; /* 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. */ innobase_release_stat_resources(trx); /* Reset the AUTOINC statement level counter for multi-row INSERTs. */ trx->n_autoinc_rows = 0; prebuilt->sql_stat_start = TRUE; prebuilt->hint_need_to_fetch_extra_cols = 0; reset_template(prebuilt); if (!prebuilt->mysql_has_locked) { /* 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; } else { if (trx->isolation_level != TRX_ISO_SERIALIZABLE && thd_sql_command(thd) == SQLCOM_SELECT && lock_type == TL_READ) { /* 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(), 2) ::external_lock(), 3) ::init_table_handle_for_HANDLER(), and 4) ::transactional_table_lock(). */ prebuilt->select_lock_type = prebuilt->stored_select_lock_type; } } trx->detailed_error[0] = '\0'; /* Set the MySQL flag to mark that there is an active transaction */ if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0) { innobase_register_trx_and_stmt(ht, thd); trx->active_flag |= TRX_ACTIVE_IN_MYSQL; } else { innobase_register_stmt(ht, thd); } return(0); } /******************************************************************//** Maps a MySQL trx isolation level code to the InnoDB isolation level code @return InnoDB isolation level */ static inline ulint innobase_map_isolation_level( /*=========================*/ enum_tx_isolation iso) /*!< in: MySQL isolation level code */ { switch(iso) { case ISO_REPEATABLE_READ: return(TRX_ISO_REPEATABLE_READ); case ISO_READ_COMMITTED: return(TRX_ISO_READ_COMMITTED); case ISO_SERIALIZABLE: return(TRX_ISO_SERIALIZABLE); case ISO_READ_UNCOMMITTED: return(TRX_ISO_READ_UNCOMMITTED); default: ut_a(0); return(0); } } /******************************************************************//** As MySQL will execute an external lock for every new table it uses when it 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 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. @return 0 */ UNIV_INTERN int ha_innobase::external_lock( /*=======================*/ THD* thd, /*!< in: handle to the user thread */ int lock_type) /*!< in: lock type */ { trx_t* trx; DBUG_ENTER("ha_innobase::external_lock"); DBUG_PRINT("enter",("lock_type: %d", lock_type)); update_thd(thd); /* Statement based binlogging does not work in isolation level READ UNCOMMITTED and READ COMMITTED since the necessary locks cannot be taken. In this case, we print an informative error message and return with an error. */ if (lock_type == F_WRLCK) { ulong const binlog_format= thd_binlog_format(thd); ulong const tx_isolation = thd_tx_isolation(ha_thd()); if (tx_isolation <= ISO_READ_COMMITTED && binlog_format == BINLOG_FORMAT_STMT #if MYSQL_VERSION_ID > 50140 && thd_binlog_filter_ok(thd) #endif /* MYSQL_VERSION_ID > 50140 */ ) { char buf[256]; my_snprintf(buf, sizeof(buf), "Transaction level '%s' in" " InnoDB is not safe for binlog mode '%s'", tx_isolation_names[tx_isolation], binlog_format_names[binlog_format]); my_error(ER_BINLOG_LOGGING_IMPOSSIBLE, MYF(0), buf); DBUG_RETURN(HA_ERR_LOGGING_IMPOSSIBLE); } } trx = prebuilt->trx; prebuilt->sql_stat_start = TRUE; prebuilt->hint_need_to_fetch_extra_cols = 0; reset_template(prebuilt); 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; prebuilt->stored_select_lock_type = LOCK_X; } if (lock_type != F_UNLCK) { /* MySQL is setting a new table lock */ trx->detailed_error[0] = '\0'; /* Set the MySQL flag to mark that there is an active transaction */ if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0) { innobase_register_trx_and_stmt(ht, thd); trx->active_flag |= TRX_ACTIVE_IN_MYSQL; } else if (trx->n_mysql_tables_in_use == 0) { innobase_register_stmt(ht, thd); } if (trx->isolation_level == TRX_ISO_SERIALIZABLE && prebuilt->select_lock_type == LOCK_NONE && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) { /* To get serializable execution, we let InnoDB conceptually add 'LOCK IN SHARE MODE' to all SELECTs 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. */ prebuilt->select_lock_type = LOCK_S; prebuilt->stored_select_lock_type = LOCK_S; } /* 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 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(thd) can hold in some cases, e.g., at the start of a stored procedure call (SQLCOM_CALL). */ if (prebuilt->select_lock_type != LOCK_NONE) { if (thd_sql_command(thd) == SQLCOM_LOCK_TABLES && THDVAR(thd, table_locks) && thd_test_options(thd, OPTION_NOT_AUTOCOMMIT) && thd_in_lock_tables(thd)) { ulint error = row_lock_table_for_mysql( prebuilt, NULL, 0); if (error != DB_SUCCESS) { error = convert_error_code_to_mysql( (int) error, 0, thd); DBUG_RETURN((int) error); } } trx->mysql_n_tables_locked++; } trx->n_mysql_tables_in_use++; prebuilt->mysql_has_locked = TRUE; DBUG_RETURN(0); } /* MySQL is releasing a table lock */ trx->n_mysql_tables_in_use--; prebuilt->mysql_has_locked = FALSE; /* 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. */ innobase_release_stat_resources(trx); /* If the MySQL lock count drops to zero we know that the current SQL statement has ended */ if (trx->n_mysql_tables_in_use == 0) { trx->mysql_n_tables_locked = 0; prebuilt->used_in_HANDLER = FALSE; if (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) { if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) != 0) { innobase_commit(ht, thd, TRUE); } } else { if (trx->isolation_level <= TRX_ISO_READ_COMMITTED && trx->global_read_view) { /* At low transaction isolation levels we let each consistent read set its own snapshot */ read_view_close_for_mysql(trx); } } } DBUG_RETURN(0); } /******************************************************************//** With this function MySQL request a transactional lock to a table when user issued query LOCK TABLES..WHERE ENGINE = InnoDB. @return error code */ UNIV_INTERN int ha_innobase::transactional_table_lock( /*==================================*/ THD* thd, /*!< in: handle to the user thread */ int lock_type) /*!< in: lock type */ { trx_t* trx; DBUG_ENTER("ha_innobase::transactional_table_lock"); DBUG_PRINT("enter",("lock_type: %d", lock_type)); /* We do not know if MySQL can call this function before calling external_lock(). To be safe, update the thd of the current table handle. */ update_thd(thd); if (prebuilt->table->ibd_file_missing && !thd_tablespace_op(thd)) { ut_print_timestamp(stderr); fprintf(stderr, " InnoDB: MySQL is trying to use a table handle" " but the .ibd file for\n" "InnoDB: table %s does not exist.\n" "InnoDB: Have you deleted the .ibd file" " from the database directory under\n" "InnoDB: the MySQL datadir?" "InnoDB: See " REFMAN "innodb-troubleshooting.html\n" "InnoDB: 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; reset_template(prebuilt); if (lock_type == F_WRLCK) { prebuilt->select_lock_type = LOCK_X; prebuilt->stored_select_lock_type = LOCK_X; } else if (lock_type == F_RDLCK) { prebuilt->select_lock_type = LOCK_S; prebuilt->stored_select_lock_type = LOCK_S; } else { ut_print_timestamp(stderr); fprintf(stderr, " InnoDB error:\n" "MySQL is trying to set transactional table lock with corrupted lock type\n" "to table %s, lock type %d does not exist.\n", prebuilt->table->name, lock_type); DBUG_RETURN(HA_ERR_CRASHED); } /* MySQL is setting a new transactional table lock */ /* Set the MySQL flag to mark that there is an active transaction */ if ((trx->active_flag & TRX_ACTIVE_IN_MYSQL) == 0) { innobase_register_trx_and_stmt(ht, thd); trx->active_flag |= TRX_ACTIVE_IN_MYSQL; } if (THDVAR(thd, table_locks) && thd_in_lock_tables(thd)) { ulint error = DB_SUCCESS; error = row_lock_table_for_mysql(prebuilt, NULL, 0); if (error != DB_SUCCESS) { error = convert_error_code_to_mysql( (int) error, prebuilt->table->flags, thd); DBUG_RETURN((int) error); } if (thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) { /* 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); } } DBUG_RETURN(0); } /************************************************************************//** Here we export InnoDB status variables to MySQL. */ static void innodb_export_status(void) /*======================*/ { if (innodb_inited) { srv_export_innodb_status(); } } /************************************************************************//** Implements the SHOW INNODB STATUS command. Sends the output of the InnoDB Monitor to the client. */ static bool innodb_show_status( /*===============*/ handlerton* hton, /*!< in: the innodb handlerton */ THD* thd, /*!< in: the MySQL query thread of the caller */ stat_print_fn *stat_print) { 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; DBUG_ENTER("innodb_show_status"); DBUG_ASSERT(hton == innodb_hton_ptr); trx = check_trx_exists(thd); innobase_release_stat_resources(trx); /* We let the InnoDB Monitor to output at most MAX_STATUS_SIZE bytes of text. */ long flen, usable_len; char* str; mutex_enter(&srv_monitor_file_mutex); rewind(srv_monitor_file); srv_printf_innodb_monitor(srv_monitor_file, FALSE, &trx_list_start, &trx_list_end); flen = ftell(srv_monitor_file); os_file_set_eof(srv_monitor_file); if (flen < 0) { flen = 0; } if (flen > MAX_STATUS_SIZE) { usable_len = MAX_STATUS_SIZE; } else { usable_len = flen; } /* allocate buffer for the string, and read the contents of the temporary file */ if (!(str = (char*) my_malloc(usable_len + 1, MYF(0)))) { mutex_exit(&srv_monitor_file_mutex); DBUG_RETURN(TRUE); } rewind(srv_monitor_file); if (flen < MAX_STATUS_SIZE) { /* Display the entire output. */ flen = (long) fread(str, 1, flen, srv_monitor_file); } 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. */ long len = (long) fread(str, 1, trx_list_start, srv_monitor_file); 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); len += (long) fread(str + len, 1, usable_len, srv_monitor_file); flen = len; } else { /* Omit the end of the output. */ flen = (long) fread(str, 1, MAX_STATUS_SIZE - 1, srv_monitor_file); } mutex_exit(&srv_monitor_file_mutex); stat_print(thd, innobase_hton_name, (uint) strlen(innobase_hton_name), STRING_WITH_LEN(""), str, flen); my_free(str, MYF(0)); DBUG_RETURN(FALSE); } /************************************************************************//** Implements the SHOW MUTEX STATUS command. @return TRUE on failure, FALSE on success. */ static bool innodb_mutex_show_status( /*=====================*/ handlerton* hton, /*!< in: the innodb handlerton */ THD* thd, /*!< in: the MySQL query thread of the caller */ stat_print_fn* stat_print) /*!< in: function for printing statistics */ { char buf1[IO_SIZE], buf2[IO_SIZE]; mutex_t* mutex; rw_lock_t* lock; ulint block_mutex_oswait_count = 0; ulint block_lock_oswait_count = 0; mutex_t* block_mutex = NULL; rw_lock_t* block_lock = NULL; #ifdef UNIV_DEBUG 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; #endif /* UNIV_DEBUG */ uint hton_name_len= (uint) strlen(innobase_hton_name), buf1len, buf2len; DBUG_ENTER("innodb_mutex_show_status"); DBUG_ASSERT(hton == innodb_hton_ptr); mutex_enter(&mutex_list_mutex); for (mutex = UT_LIST_GET_FIRST(mutex_list); mutex != NULL; mutex = UT_LIST_GET_NEXT(list, mutex)) { if (mutex->count_os_wait == 0) { continue; } if (buf_pool_is_block_mutex(mutex)) { block_mutex = mutex; block_mutex_oswait_count += mutex->count_os_wait; continue; } #ifdef UNIV_DEBUG 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, (ulong) (mutex->lspent_time/1000)); if (stat_print(thd, innobase_hton_name, hton_name_len, buf1, buf1len, buf2, buf2len)) { mutex_exit(&mutex_list_mutex); 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; } #else /* UNIV_DEBUG */ buf1len= (uint) my_snprintf(buf1, sizeof(buf1), "%s:%lu", mutex->cfile_name, (ulong) mutex->cline); buf2len= (uint) my_snprintf(buf2, sizeof(buf2), "os_waits=%lu", (ulong) mutex->count_os_wait); if (stat_print(thd, innobase_hton_name, hton_name_len, buf1, buf1len, buf2, buf2len)) { mutex_exit(&mutex_list_mutex); DBUG_RETURN(1); } #endif /* UNIV_DEBUG */ } if (block_mutex) { buf1len = (uint) my_snprintf(buf1, sizeof buf1, "combined %s:%lu", block_mutex->cfile_name, (ulong) block_mutex->cline); buf2len = (uint) my_snprintf(buf2, sizeof buf2, "os_waits=%lu", (ulong) block_mutex_oswait_count); if (stat_print(thd, innobase_hton_name, hton_name_len, buf1, buf1len, buf2, buf2len)) { mutex_exit(&mutex_list_mutex); DBUG_RETURN(1); } } mutex_exit(&mutex_list_mutex); mutex_enter(&rw_lock_list_mutex); for (lock = UT_LIST_GET_FIRST(rw_lock_list); lock != NULL; lock = UT_LIST_GET_NEXT(list, lock)) { if (lock->count_os_wait == 0) { continue; } if (buf_pool_is_block_lock(lock)) { block_lock = lock; block_lock_oswait_count += lock->count_os_wait; continue; } buf1len = my_snprintf(buf1, sizeof buf1, "%s:%lu", lock->cfile_name, (ulong) lock->cline); buf2len = my_snprintf(buf2, sizeof buf2, "os_waits=%lu", (ulong) lock->count_os_wait); if (stat_print(thd, innobase_hton_name, hton_name_len, buf1, buf1len, buf2, buf2len)) { mutex_exit(&rw_lock_list_mutex); DBUG_RETURN(1); } } if (block_lock) { buf1len = (uint) my_snprintf(buf1, sizeof buf1, "combined %s:%lu", block_lock->cfile_name, (ulong) block_lock->cline); buf2len = (uint) my_snprintf(buf2, sizeof buf2, "os_waits=%lu", (ulong) block_lock_oswait_count); if (stat_print(thd, innobase_hton_name, hton_name_len, buf1, buf1len, buf2, buf2len)) { mutex_exit(&rw_lock_list_mutex); DBUG_RETURN(1); } } mutex_exit(&rw_lock_list_mutex); #ifdef UNIV_DEBUG buf2len = my_snprintf(buf2, sizeof buf2, "count=%lu, spin_waits=%lu, spin_rounds=%lu, " "os_waits=%lu, os_yields=%lu, os_wait_times=%lu", (ulong) rw_lock_count, (ulong) rw_lock_count_spin_loop, (ulong) rw_lock_count_spin_rounds, (ulong) rw_lock_count_os_wait, (ulong) rw_lock_count_os_yield, (ulong) (rw_lock_wait_time / 1000)); if (stat_print(thd, innobase_hton_name, hton_name_len, STRING_WITH_LEN("rw_lock_mutexes"), buf2, buf2len)) { DBUG_RETURN(1); } #endif /* UNIV_DEBUG */ DBUG_RETURN(FALSE); } static bool innobase_show_status(handlerton *hton, THD* thd, stat_print_fn* stat_print, enum ha_stat_type stat_type) { DBUG_ASSERT(hton == innodb_hton_ptr); switch (stat_type) { case HA_ENGINE_STATUS: return innodb_show_status(hton, thd, stat_print); case HA_ENGINE_MUTEX: return innodb_mutex_show_status(hton, thd, stat_print); default: return(FALSE); } } /************************************************************************//** Handling the shared INNOBASE_SHARE structure that is needed to provide table locking. ****************************************************************************/ static INNOBASE_SHARE* get_share(const char* table_name) { INNOBASE_SHARE *share; pthread_mutex_lock(&innobase_share_mutex); ulint fold = ut_fold_string(table_name); HASH_SEARCH(table_name_hash, innobase_open_tables, fold, INNOBASE_SHARE*, share, ut_ad(share->use_count > 0), !strcmp(share->table_name, table_name)); if (!share) { uint length = (uint) strlen(table_name); /* TODO: invoke HASH_MIGRATE if innobase_open_tables grows too big */ share = (INNOBASE_SHARE *) my_malloc(sizeof(*share)+length+1, MYF(MY_FAE | MY_ZEROFILL)); share->table_name = (char*) memcpy(share + 1, table_name, length + 1); HASH_INSERT(INNOBASE_SHARE, table_name_hash, innobase_open_tables, fold, share); thr_lock_init(&share->lock); /* Index translation table initialization */ share->idx_trans_tbl.index_mapping = NULL; share->idx_trans_tbl.index_count = 0; share->idx_trans_tbl.array_size = 0; } share->use_count++; pthread_mutex_unlock(&innobase_share_mutex); return(share); } static void free_share(INNOBASE_SHARE* share) { pthread_mutex_lock(&innobase_share_mutex); #ifdef UNIV_DEBUG INNOBASE_SHARE* share2; ulint fold = ut_fold_string(share->table_name); HASH_SEARCH(table_name_hash, innobase_open_tables, fold, INNOBASE_SHARE*, share2, ut_ad(share->use_count > 0), !strcmp(share->table_name, share2->table_name)); ut_a(share2 == share); #endif /* UNIV_DEBUG */ if (!--share->use_count) { ulint fold = ut_fold_string(share->table_name); HASH_DELETE(INNOBASE_SHARE, table_name_hash, innobase_open_tables, fold, share); thr_lock_delete(&share->lock); /* Free any memory from index translation table */ my_free(share->idx_trans_tbl.index_mapping, MYF(MY_ALLOW_ZERO_PTR)); my_free(share, MYF(0)); /* TODO: invoke HASH_MIGRATE if innobase_open_tables shrinks too much */ } pthread_mutex_unlock(&innobase_share_mutex); } /*****************************************************************//** Converts a MySQL table lock stored in the 'lock' field of the handle to 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. @return pointer to the next element in the 'to' array */ UNIV_INTERN THR_LOCK_DATA** ha_innobase::store_lock( /*====================*/ THD* thd, /*!< in: user thread handle */ THR_LOCK_DATA** to, /*!< in: pointer to an array of pointers to lock structs; pointer to the 'lock' field of current handle is stored next to this array */ enum thr_lock_type lock_type) /*!< in: lock type to store in 'lock'; this may also be TL_IGNORE */ { trx_t* trx; /* Note that trx in this function is NOT necessarily prebuilt->trx because we call update_thd() later, in ::external_lock()! Failure to understand this caused a serious memory corruption bug in 5.1.11. */ trx = check_trx_exists(thd); /* NOTE: MySQL can call this function with lock 'type' TL_IGNORE! Be careful to ignore TL_IGNORE if we are going to do something with only 'real' locks! */ /* If no MySQL table is in use, we need to set the 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_tx_isolation(thd)); if (trx->isolation_level <= TRX_ISO_READ_COMMITTED && trx->global_read_view) { /* At low transaction isolation levels we let each consistent read set its own snapshot */ read_view_close_for_mysql(trx); } } DBUG_ASSERT(EQ_CURRENT_THD(thd)); const bool in_lock_tables = thd_in_lock_tables(thd); const uint sql_command = thd_sql_command(thd); if (sql_command == SQLCOM_DROP_TABLE) { /* MySQL calls this function in DROP TABLE though this table handle may belong to another thd that is running a query. Let us in that case skip any changes to the prebuilt struct. */ } else if ((lock_type == TL_READ && in_lock_tables) || (lock_type == TL_READ_HIGH_PRIORITY && in_lock_tables) || lock_type == TL_READ_WITH_SHARED_LOCKS || lock_type == TL_READ_NO_INSERT || (lock_type != TL_IGNORE && sql_command != SQLCOM_SELECT)) { /* The OR cases above are in this order: 1) MySQL is doing LOCK TABLES ... READ LOCAL, or we are processing a stored procedure or function, 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 INSERT INTO ... SELECT ... and the logical logging (MySQL binlog) requires the use of a locking read, or 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 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. */ 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) && (sql_command == SQLCOM_INSERT_SELECT || sql_command == SQLCOM_REPLACE_SELECT || sql_command == SQLCOM_UPDATE || sql_command == SQLCOM_CREATE_TABLE || sql_command == SQLCOM_SET_OPTION)) { /* 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 is not set to serializable and MySQL is doing INSERT INTO...SELECT or REPLACE INTO...SELECT or UPDATE ... = (SELECT ...) or CREATE ... SELECT... or SET ... = (SELECT ...) without FOR UPDATE or IN SHARE MODE in select, then we use consistent read for select. */ prebuilt->select_lock_type = LOCK_NONE; prebuilt->stored_select_lock_type = LOCK_NONE; } else if (sql_command == SQLCOM_CHECKSUM) { /* Use consistent read for checksum table */ 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; } } else if (lock_type != TL_IGNORE) { /* We set possible LOCK_X value in external_lock, not yet here even if this would be SELECT ... FOR UPDATE */ prebuilt->select_lock_type = LOCK_NONE; prebuilt->stored_select_lock_type = LOCK_NONE; } if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK) { /* Starting from 5.0.7, we weaken also the table locks 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 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). */ if (lock_type == TL_READ && sql_command == SQLCOM_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 equivalent to READ. This will change the InnoDB behavior in mysqldump, so that dumps of InnoDB tables are consistent with dumps of MyISAM tables. */ lock_type = TL_READ_NO_INSERT; } /* If we are not doing a LOCK TABLE, DISCARD/IMPORT TABLESPACE or TRUNCATE TABLE then allow multiple writers. Note that ALTER TABLE uses a TL_WRITE_ALLOW_READ < TL_WRITE_CONCURRENT_INSERT. 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 in_lock_tables TRUE there). */ if ((lock_type >= TL_WRITE_CONCURRENT_INSERT && lock_type <= TL_WRITE) && !(in_lock_tables && sql_command == SQLCOM_LOCK_TABLES) && !thd_tablespace_op(thd) && sql_command != SQLCOM_TRUNCATE && sql_command != SQLCOM_OPTIMIZE && sql_command != SQLCOM_CREATE_TABLE) { lock_type = TL_WRITE_ALLOW_WRITE; } /* 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 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). */ if (lock_type == TL_READ_NO_INSERT && sql_command != SQLCOM_LOCK_TABLES) { lock_type = TL_READ; } lock.type = lock_type; } *to++= &lock; return(to); } /*********************************************************************//** Read the next autoinc value. Acquire the relevant locks before reading the AUTOINC value. If SUCCESS then the table AUTOINC mutex will be locked on return and all relevant locks acquired. @return DB_SUCCESS or error code */ UNIV_INTERN ulint ha_innobase::innobase_get_autoinc( /*==============================*/ ulonglong* value) /*!< out: autoinc value */ { *value = 0; prebuilt->autoinc_error = innobase_lock_autoinc(); if (prebuilt->autoinc_error == DB_SUCCESS) { /* Determine the first value of the interval */ *value = dict_table_autoinc_read(prebuilt->table); /* It should have been initialized during open. */ if (*value == 0) { prebuilt->autoinc_error = DB_UNSUPPORTED; dict_table_autoinc_unlock(prebuilt->table); } } return(prebuilt->autoinc_error); } /*******************************************************************//** This function reads the global auto-inc counter. It doesn't use the AUTOINC lock even if the lock mode is set to TRADITIONAL. @return the autoinc value */ UNIV_INTERN ulonglong ha_innobase::innobase_peek_autoinc(void) /*====================================*/ { ulonglong auto_inc; dict_table_t* innodb_table; ut_a(prebuilt != NULL); ut_a(prebuilt->table != NULL); innodb_table = prebuilt->table; dict_table_autoinc_lock(innodb_table); auto_inc = dict_table_autoinc_read(innodb_table); if (auto_inc == 0) { ut_print_timestamp(stderr); fprintf(stderr, " InnoDB: AUTOINC next value generation " "is disabled for '%s'\n", innodb_table->name); } dict_table_autoinc_unlock(innodb_table); return(auto_inc); } /*********************************************************************//** This function initializes the auto-inc counter if it has not been initialized yet. This function does not change the value of the auto-inc counter if it already has been initialized. Returns the value of the auto-inc counter 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) */ UNIV_INTERN void ha_innobase::get_auto_increment( /*============================*/ ulonglong offset, /*!< in: table autoinc offset */ ulonglong increment, /*!< in: table autoinc increment */ ulonglong nb_desired_values, /*!< in: number of values reqd */ ulonglong *first_value, /*!< out: the autoinc value */ ulonglong *nb_reserved_values) /*!< out: count of reserved values */ { trx_t* trx; ulint error; ulonglong autoinc = 0; /* Prepare prebuilt->trx in the table handle */ update_thd(ha_thd()); error = innobase_get_autoinc(&autoinc); if (error != DB_SUCCESS) { *first_value = (~(ulonglong) 0); return; } /* This is a hack, since nb_desired_values seems to be accurate only for the first call to get_auto_increment() for multi-row INSERT and meaningless for other statements e.g, LOAD etc. Subsequent calls to this method for the same statement results in different values which don't make sense. Therefore we store the value the first time we are called and count down from that as rows are written (see write_row()). */ trx = prebuilt->trx; /* Note: We can't rely on *first_value since some MySQL engines, in particular the partition engine, don't initialize it to 0 when invoking this method. So we are not sure if it's guaranteed to be 0 or not. */ /* We need the upper limit of the col type to check for whether we update the table autoinc counter or not. */ ulonglong col_max_value = innobase_get_int_col_max_value( table->next_number_field); /* Called for the first time ? */ if (trx->n_autoinc_rows == 0) { trx->n_autoinc_rows = (ulint) nb_desired_values; /* It's possible for nb_desired_values to be 0: e.g., INSERT INTO T1(C) SELECT C FROM T2; */ if (nb_desired_values == 0) { trx->n_autoinc_rows = 1; } set_if_bigger(*first_value, autoinc); /* Not in the middle of a mult-row INSERT. */ } else if (prebuilt->autoinc_last_value == 0) { set_if_bigger(*first_value, autoinc); /* Check for -ve values. */ } else if (*first_value > col_max_value && trx->n_autoinc_rows > 0) { /* Set to next logical value. */ ut_a(autoinc > trx->n_autoinc_rows); *first_value = (autoinc - trx->n_autoinc_rows) - 1; } *nb_reserved_values = trx->n_autoinc_rows; /* With old style AUTOINC locking we only update the table's AUTOINC counter after attempting to insert the row. */ if (innobase_autoinc_lock_mode != AUTOINC_OLD_STYLE_LOCKING) { ulonglong need; ulonglong current; ulonglong next_value; current = *first_value > col_max_value ? autoinc : *first_value; need = *nb_reserved_values * increment; /* Compute the last value in the interval */ next_value = innobase_next_autoinc( current, need, offset, col_max_value); prebuilt->autoinc_last_value = next_value; if (prebuilt->autoinc_last_value < *first_value) { *first_value = (~(ulonglong) 0); } else { /* Update the table autoinc variable */ dict_table_autoinc_update_if_greater( prebuilt->table, prebuilt->autoinc_last_value); } } else { /* This will force write_row() into attempting an update of the table's AUTOINC counter. */ prebuilt->autoinc_last_value = 0; } /* The increment to be used to increase the AUTOINC value, we use this in write_row() and update_row() to increase the autoinc counter for columns that are filled by the user. We need the offset and the increment. */ prebuilt->autoinc_offset = offset; prebuilt->autoinc_increment = increment; dict_table_autoinc_unlock(prebuilt->table); } /*******************************************************************//** Reset the auto-increment counter to the given value, i.e. the next row inserted will get the given value. This is called e.g. after TRUNCATE is emulated by doing a 'DELETE FROM t'. HA_ERR_WRONG_COMMAND is returned by storage engines that don't support this operation. @return 0 or error code */ UNIV_INTERN int ha_innobase::reset_auto_increment( /*==============================*/ ulonglong value) /*!< in: new value for table autoinc */ { DBUG_ENTER("ha_innobase::reset_auto_increment"); int error; update_thd(ha_thd()); error = row_lock_table_autoinc_for_mysql(prebuilt); if (error != DB_SUCCESS) { error = convert_error_code_to_mysql(error, prebuilt->table->flags, user_thd); DBUG_RETURN(error); } /* The next value can never be 0. */ if (value == 0) { value = 1; } innobase_reset_autoinc(value); DBUG_RETURN(0); } /* See comment in handler.cc */ UNIV_INTERN bool ha_innobase::get_error_message(int error, String *buf) { trx_t* trx = check_trx_exists(ha_thd()); buf->copy(trx->detailed_error, (uint) strlen(trx->detailed_error), system_charset_info); return(FALSE); } /*******************************************************************//** 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. @return < 0 if ref1 < ref2, 0 if equal, else > 0 */ UNIV_INTERN int ha_innobase::cmp_ref( /*=================*/ const uchar* ref1, /*!< in: an (internal) primary key value in the MySQL key value format */ const uchar* ref2) /*!< in: an (internal) primary key value in the MySQL key value format */ { enum_field_types mysql_type; Field* field; KEY_PART_INFO* key_part; KEY_PART_INFO* key_part_end; uint len1; uint len2; int result; if (prebuilt->clust_index_was_generated) { /* The 'ref' is an InnoDB row id */ return(memcmp(ref1, ref2, DATA_ROW_ID_LEN)); } /* Do a type-aware comparison of primary key fields. PK fields are always NOT NULL, so no checks for NULL are performed. */ key_part = table->key_info[table->s->primary_key].key_part; key_part_end = key_part + table->key_info[table->s->primary_key].key_parts; for (; key_part != key_part_end; ++key_part) { field = key_part->field; mysql_type = field->type(); if (mysql_type == MYSQL_TYPE_TINY_BLOB || mysql_type == MYSQL_TYPE_MEDIUM_BLOB || mysql_type == MYSQL_TYPE_BLOB || mysql_type == MYSQL_TYPE_LONG_BLOB) { /* 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); ref1 += 2; ref2 += 2; result = ((Field_blob*)field)->cmp( ref1, len1, ref2, len2); } else { result = field->key_cmp(ref1, ref2); } if (result) { return(result); } ref1 += key_part->store_length; ref2 += key_part->store_length; } return(0); } /*******************************************************************//** Ask InnoDB if a query to a table can be cached. @return TRUE if query caching of the table is permitted */ UNIV_INTERN my_bool ha_innobase::register_query_cache_table( /*====================================*/ THD* thd, /*!< in: user thread handle */ char* table_key, /*!< in: concatenation of database name, the null character NUL, and the table name */ uint key_length, /*!< in: length of the full name, i.e. len(dbname) + len(tablename) + 1 */ qc_engine_callback* call_back, /*!< out: pointer to function for checking if query caching is permitted */ ulonglong *engine_data) /*!< in/out: data to call_back */ { *call_back = innobase_query_caching_of_table_permitted; *engine_data = 0; return(innobase_query_caching_of_table_permitted(thd, table_key, key_length, engine_data)); } UNIV_INTERN char* ha_innobase::get_mysql_bin_log_name() { return(trx_sys_mysql_bin_log_name); } UNIV_INTERN ulonglong ha_innobase::get_mysql_bin_log_pos() { /* trx... is ib_int64_t, which is a typedef for a 64-bit integer (__int64 or longlong) so it's ok to cast it to ulonglong. */ return(trx_sys_mysql_bin_log_pos); } /******************************************************************//** 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. @return number of bytes occupied by the first n characters */ extern "C" UNIV_INTERN ulint innobase_get_at_most_n_mbchars( /*===========================*/ ulint charset_id, /*!< in: character set id */ ulint prefix_len, /*!< in: prefix length in bytes of the index (this has to be divided by mbmaxlen to get the number of CHARACTERS n in the prefix) */ ulint data_len, /*!< in: length of the string in bytes */ const char* str) /*!< in: character string */ { ulint char_length; /*!< character length in bytes */ ulint n_chars; /*!< number of characters in prefix */ CHARSET_INFO* charset; /*!< charset used in the field */ charset = get_charset((uint) charset_id, MYF(MY_WME)); ut_ad(charset); ut_ad(charset->mbmaxlen); /* Calculate how many characters at most the prefix index contains */ n_chars = prefix_len / charset->mbmaxlen; /* 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 character. */ if (charset->mbmaxlen > 1) { /* my_charpos() returns the byte length of the first n_chars 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. */ char_length = my_charpos(charset, str, str + data_len, (int) n_chars); if (char_length > data_len) { char_length = data_len; } } else { if (data_len < prefix_len) { char_length = data_len; } else { char_length = prefix_len; } } return(char_length); } /*******************************************************************//** This function is used to prepare an X/Open XA distributed transaction. @return 0 or error number */ static int innobase_xa_prepare( /*================*/ handlerton* hton, /*!< in: InnoDB handlerton */ 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; trx_t* trx = check_trx_exists(thd); DBUG_ASSERT(hton == innodb_hton_ptr); /* we use support_xa value as it was seen at transaction start time, not the current session variable value. Any possible changes to the session variable take effect only in the next transaction */ if (!trx->support_xa) { return(0); } thd_get_xid(thd, (MYSQL_XID*) &trx->xid); /* 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_flag & TRX_ACTIVE_IN_MYSQL) == 0 && trx->conc_state != TRX_NOT_STARTED) { sql_print_error("trx->active_flag & TRX_ACTIVE_IN_MYSQL == 0, but" " trx->conc_state != TRX_NOT_STARTED"); } if (all || (!thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) { /* We were instructed to prepare the whole transaction, or this is an SQL statement end and autocommit is on */ ut_ad(trx->active_flag & TRX_ACTIVE_IN_MYSQL); error = (int) trx_prepare_for_mysql(trx); } else { /* We just mark the SQL statement ended and do not do a transaction prepare */ /* If we had reserved the auto-inc lock for some table in this SQL statement we release it now */ row_unlock_table_autoinc_for_mysql(trx); /* Store the current undo_no of the transaction so that we know where to roll back if we have to roll back the next SQL statement */ trx_mark_sql_stat_end(trx); } /* Tell the InnoDB server that there might be work for utility threads: */ srv_active_wake_master_thread(); return(error); } /*******************************************************************//** This function is used to recover X/Open XA distributed transactions. @return number of prepared transactions stored in xid_list */ static int innobase_xa_recover( /*================*/ handlerton* hton, /*!< in: InnoDB handlerton */ XID* xid_list,/*!< in/out: prepared transactions */ uint len) /*!< in: number of slots in xid_list */ { DBUG_ASSERT(hton == innodb_hton_ptr); if (len == 0 || xid_list == NULL) { return(0); } return(trx_recover_for_mysql(xid_list, len)); } /*******************************************************************//** This function is used to commit one X/Open XA distributed transaction which is in the prepared state @return 0 or error number */ static int innobase_commit_by_xid( /*===================*/ handlerton *hton, XID* xid) /*!< in: X/Open XA transaction identification */ { trx_t* trx; DBUG_ASSERT(hton == innodb_hton_ptr); trx = trx_get_trx_by_xid(xid); if (trx) { innobase_commit_low(trx); 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 @return 0 or error number */ static int innobase_rollback_by_xid( /*=====================*/ handlerton* hton, /*!< in: InnoDB handlerton */ XID* xid) /*!< in: X/Open XA transaction identification */ { trx_t* trx; DBUG_ASSERT(hton == innodb_hton_ptr); trx = trx_get_trx_by_xid(xid); if (trx) { return(innobase_rollback_trx(trx)); } else { return(XAER_NOTA); } } /*******************************************************************//** Create a consistent view for a cursor based on current transaction which is created if the corresponding MySQL thread still lacks one. This consistent view is then used inside of MySQL when accessing records using a cursor. @return pointer to cursor view or NULL */ static void* innobase_create_cursor_view( /*========================*/ handlerton *hton, /*!< in: innobase hton */ THD* thd) /*!< in: user thread handle */ { DBUG_ASSERT(hton == innodb_hton_ptr); return(read_cursor_view_create_for_mysql(check_trx_exists(thd))); } /*******************************************************************//** Close the given consistent cursor view of a transaction and restore global read view to a transaction read view. Transaction is created if the corresponding MySQL thread still lacks one. */ static void innobase_close_cursor_view( /*=======================*/ handlerton *hton, THD* thd, /*!< in: user thread handle */ void* curview)/*!< in: Consistent read view to be closed */ { DBUG_ASSERT(hton == innodb_hton_ptr); read_cursor_view_close_for_mysql(check_trx_exists(thd), (cursor_view_t*) curview); } /*******************************************************************//** Set the given consistent cursor view to a transaction which is created if the corresponding MySQL thread still lacks one. If the given consistent cursor view is NULL global read view of a transaction is restored to a transaction read view. */ static void innobase_set_cursor_view( /*=====================*/ handlerton *hton, THD* thd, /*!< in: user thread handle */ void* curview)/*!< in: Consistent cursor view to be set */ { DBUG_ASSERT(hton == innodb_hton_ptr); read_cursor_set_for_mysql(check_trx_exists(thd), (cursor_view_t*) curview); } /*******************************************************************//** If col_name is not NULL, check whether the named column is being renamed in the table. If col_name is not provided, check whether any one of columns in the table is being renamed. @return true if the column is being renamed */ static bool check_column_being_renamed( /*=======================*/ const TABLE* table, /*!< in: MySQL table */ const char* col_name) /*!< in: name of the column */ { uint k; Field* field; for (k = 0; k < table->s->fields; k++) { field = table->field[k]; if (field->flags & FIELD_IS_RENAMED) { /* If col_name is not provided, return if the field is marked as being renamed. */ if (!col_name) { return(true); } /* If col_name is provided, return only if names match */ if (innobase_strcasecmp(field->field_name, col_name) == 0) { return(true); } } } return(false); } /*******************************************************************//** Check whether any of the given columns is being renamed in the table. @return true if any of col_names is being renamed in table */ static bool column_is_being_renamed( /*====================*/ TABLE* table, /*!< in: MySQL table */ uint n_cols, /*!< in: number of columns */ const char** col_names) /*!< in: names of the columns */ { uint j; for (j = 0; j < n_cols; j++) { if (check_column_being_renamed(table, col_names[j])) { return(true); } } return(false); } /*********************************************************************** Check whether a column in table "table" is being renamed and if this column is part of a foreign key, either part of another table, referencing this table or part of this table, referencing another table. */ static bool foreign_key_column_is_being_renamed( /*================================*/ /* out: true if a column that participates in a foreign key definition is being renamed */ row_prebuilt_t* prebuilt, /* in: InnoDB prebuilt struct */ TABLE* table) /* in: MySQL table */ { dict_foreign_t* foreign; /* check whether there are foreign keys at all */ if (UT_LIST_GET_LEN(prebuilt->table->foreign_list) == 0 && UT_LIST_GET_LEN(prebuilt->table->referenced_list) == 0) { /* no foreign keys involved with prebuilt->table */ return(false); } row_mysql_lock_data_dictionary(prebuilt->trx); /* Check whether any column in the foreign key constraints which refer to this table is being renamed. */ for (foreign = UT_LIST_GET_FIRST(prebuilt->table->referenced_list); foreign != NULL; foreign = UT_LIST_GET_NEXT(referenced_list, foreign)) { if (column_is_being_renamed(table, foreign->n_fields, foreign->referenced_col_names)) { row_mysql_unlock_data_dictionary(prebuilt->trx); return(true); } } /* Check whether any column in the foreign key constraints in the table is being renamed. */ for (foreign = UT_LIST_GET_FIRST(prebuilt->table->foreign_list); foreign != NULL; foreign = UT_LIST_GET_NEXT(foreign_list, foreign)) { if (column_is_being_renamed(table, foreign->n_fields, foreign->foreign_col_names)) { row_mysql_unlock_data_dictionary(prebuilt->trx); return(true); } } row_mysql_unlock_data_dictionary(prebuilt->trx); return(false); } UNIV_INTERN bool ha_innobase::check_if_incompatible_data( HA_CREATE_INFO* info, uint table_changes) { if (table_changes != IS_EQUAL_YES) { 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) { return(COMPATIBLE_DATA_NO); } /* For column rename operation, MySQL does not supply enough information (new column name etc.) for InnoDB to make appropriate system metadata change. To avoid system metadata inconsistency, currently we can just request a table rebuild/copy by returning COMPATIBLE_DATA_NO */ if (check_column_being_renamed(table, NULL)) { return COMPATIBLE_DATA_NO; } /* Check if a column participating in a foreign key is being renamed. There is no mechanism for updating InnoDB foreign key definitions. */ if (foreign_key_column_is_being_renamed(prebuilt, table)) { return COMPATIBLE_DATA_NO; } /* Check that row format didn't change */ if ((info->used_fields & HA_CREATE_USED_ROW_FORMAT) && info->row_type != ROW_TYPE_DEFAULT && info->row_type != get_row_type()) { return(COMPATIBLE_DATA_NO); } /* Specifying KEY_BLOCK_SIZE requests a rebuild of the table. */ if (info->used_fields & HA_CREATE_USED_KEY_BLOCK_SIZE) { return(COMPATIBLE_DATA_NO); } return(COMPATIBLE_DATA_YES); } /************************************************************//** Validate the file format name and return its corresponding id. @return valid file format id */ static uint innobase_file_format_name_lookup( /*=============================*/ const char* format_name) /*!< in: pointer to file format name */ { char* endp; uint format_id; ut_a(format_name != NULL); /* The format name can contain the format id itself instead of the name and we check for that. */ format_id = (uint) strtoul(format_name, &endp, 10); /* Check for valid parse. */ if (*endp == '\0' && *format_name != '\0') { if (format_id <= DICT_TF_FORMAT_MAX) { return(format_id); } } else { for (format_id = 0; format_id <= DICT_TF_FORMAT_MAX; format_id++) { const char* name; name = trx_sys_file_format_id_to_name(format_id); if (!innobase_strcasecmp(format_name, name)) { return(format_id); } } } return(DICT_TF_FORMAT_MAX + 1); } /************************************************************//** Validate the file format check value, is it one of "on" or "off", as a side effect it sets the srv_check_file_format_at_startup variable. @return true if config value one of "on" or "off" */ static bool innobase_file_format_check_on_off( /*==============================*/ const char* format_check) /*!< in: parameter value */ { bool ret = true; if (!innobase_strcasecmp(format_check, "off")) { /* Set the value to disable checking. */ srv_check_file_format_at_startup = DICT_TF_FORMAT_MAX + 1; } else if (!innobase_strcasecmp(format_check, "on")) { /* Set the value to the lowest supported format. */ srv_check_file_format_at_startup = DICT_TF_FORMAT_51; } else { ret = FALSE; } return(ret); } /************************************************************//** Validate the file format check config parameters, as a side effect it sets the srv_check_file_format_at_startup variable. @return the format_id if valid config value, otherwise, return -1 */ static int innobase_file_format_validate_and_set( /*================================*/ const char* format_check) /*!< in: parameter value */ { uint format_id; format_id = innobase_file_format_name_lookup(format_check); if (format_id < DICT_TF_FORMAT_MAX + 1) { srv_check_file_format_at_startup = format_id; return((int) format_id); } else { return(-1); } } /*************************************************************//** Check if it is a valid file format. This function is registered as a callback with MySQL. @return 0 for valid file format */ static int innodb_file_format_name_validate( /*=============================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* save, /*!< out: immediate result for update function */ struct st_mysql_value* value) /*!< in: incoming string */ { const char* file_format_input; char buff[STRING_BUFFER_USUAL_SIZE]; int len = sizeof(buff); ut_a(save != NULL); ut_a(value != NULL); file_format_input = value->val_str(value, buff, &len); if (file_format_input != NULL) { uint format_id; format_id = innobase_file_format_name_lookup( file_format_input); if (format_id <= DICT_TF_FORMAT_MAX) { /* Save a pointer to the name in the 'file_format_name_map' constant array. */ *static_cast(save) = trx_sys_file_format_id_to_name(format_id); return(0); } } *static_cast(save) = NULL; return(1); } /****************************************************************//** Update the system variable innodb_file_format using the "saved" value. This function is registered as a callback with MySQL. */ static void innodb_file_format_name_update( /*===========================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* var_ptr, /*!< out: where the formal string goes */ const void* save) /*!< in: immediate result from check function */ { const char* format_name; ut_a(var_ptr != NULL); ut_a(save != NULL); format_name = *static_cast(save); if (format_name) { uint format_id; format_id = innobase_file_format_name_lookup(format_name); if (format_id <= DICT_TF_FORMAT_MAX) { srv_file_format = format_id; } } *static_cast(var_ptr) = trx_sys_file_format_id_to_name(srv_file_format); } /*************************************************************//** Check if valid argument to innodb_file_format_check. This function is registered as a callback with MySQL. @return 0 for valid file format */ static int innodb_file_format_check_validate( /*==============================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* save, /*!< out: immediate result for update function */ struct st_mysql_value* value) /*!< in: incoming string */ { const char* file_format_input; char buff[STRING_BUFFER_USUAL_SIZE]; int len = sizeof(buff); int format_id; ut_a(save != NULL); ut_a(value != NULL); file_format_input = value->val_str(value, buff, &len); if (file_format_input != NULL) { /* Check if user set on/off, we want to print a suitable message if they did so. */ if (innobase_file_format_check_on_off(file_format_input)) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WRONG_ARGUMENTS, "InnoDB: invalid innodb_file_format_check " "value; on/off can only be set at startup or " "in the configuration file"); } else { format_id = innobase_file_format_validate_and_set( file_format_input); if (format_id >= 0) { /* Save a pointer to the name in the 'file_format_name_map' constant array. */ *static_cast(save) = trx_sys_file_format_id_to_name( (uint)format_id); return(0); } else { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WRONG_ARGUMENTS, "InnoDB: invalid innodb_file_format_check " "value; can be any format up to %s " "or its equivalent numeric id", trx_sys_file_format_id_to_name( DICT_TF_FORMAT_MAX)); } } } *static_cast(save) = NULL; return(1); } /****************************************************************//** Update the system variable innodb_file_format_check using the "saved" value. This function is registered as a callback with MySQL. */ static void innodb_file_format_check_update( /*============================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* var_ptr, /*!< out: where the formal string goes */ const void* save) /*!< in: immediate result from check function */ { const char* format_name_in; const char** format_name_out; uint format_id; ut_a(save != NULL); ut_a(var_ptr != NULL); format_name_in = *static_cast(save); if (!format_name_in) { return; } format_id = innobase_file_format_name_lookup(format_name_in); if (format_id > DICT_TF_FORMAT_MAX) { /* DEFAULT is "on", which is invalid at runtime. */ push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WRONG_ARGUMENTS, "Ignoring SET innodb_file_format=%s", format_name_in); return; } format_name_out = static_cast(var_ptr); /* Update the max format id in the system tablespace. */ if (trx_sys_file_format_max_set(format_id, format_name_out)) { ut_print_timestamp(stderr); fprintf(stderr, " [Info] InnoDB: the file format in the system " "tablespace is now set to %s.\n", *format_name_out); } } /****************************************************************//** Update the system variable innodb_adaptive_hash_index using the "saved" value. This function is registered as a callback with MySQL. */ static void innodb_adaptive_hash_index_update( /*==============================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* var_ptr, /*!< out: where the formal string goes */ const void* save) /*!< in: immediate result from check function */ { if (*(my_bool*) save) { btr_search_enable(); } else { btr_search_disable(); } } /****************************************************************//** Update the system variable innodb_old_blocks_pct using the "saved" value. This function is registered as a callback with MySQL. */ static void innodb_old_blocks_pct_update( /*=========================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* var_ptr,/*!< out: where the formal string goes */ const void* save) /*!< in: immediate result from check function */ { innobase_old_blocks_pct = buf_LRU_old_ratio_update( *static_cast(save), TRUE); } /*************************************************************//** Find the corresponding ibuf_use_t value that indexes into innobase_change_buffering_values[] array for the input change buffering option name. @return corresponding IBUF_USE_* value for the input variable name, or IBUF_USE_COUNT if not able to find a match */ static ibuf_use_t innodb_find_change_buffering_value( /*===============================*/ const char* input_name) /*!< in: input change buffering option name */ { ulint use; for (use = 0; use < UT_ARR_SIZE(innobase_change_buffering_values); use++) { /* found a match */ if (!innobase_strcasecmp( input_name, innobase_change_buffering_values[use])) { return((ibuf_use_t)use); } } /* Did not find any match */ return(IBUF_USE_COUNT); } /*************************************************************//** Check if it is a valid value of innodb_change_buffering. This function is registered as a callback with MySQL. @return 0 for valid innodb_change_buffering */ static int innodb_change_buffering_validate( /*=============================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* save, /*!< out: immediate result for update function */ struct st_mysql_value* value) /*!< in: incoming string */ { const char* change_buffering_input; char buff[STRING_BUFFER_USUAL_SIZE]; int len = sizeof(buff); ut_a(save != NULL); ut_a(value != NULL); change_buffering_input = value->val_str(value, buff, &len); if (change_buffering_input != NULL) { ibuf_use_t use; use = innodb_find_change_buffering_value( change_buffering_input); if (use != IBUF_USE_COUNT) { /* Find a matching change_buffering option value. */ *static_cast(save) = innobase_change_buffering_values[use]; return(0); } } /* No corresponding change buffering option for user supplied "change_buffering_input" */ return(1); } /****************************************************************//** Update the system variable innodb_change_buffering using the "saved" value. This function is registered as a callback with MySQL. */ static void innodb_change_buffering_update( /*===========================*/ THD* thd, /*!< in: thread handle */ struct st_mysql_sys_var* var, /*!< in: pointer to system variable */ void* var_ptr,/*!< out: where the formal string goes */ const void* save) /*!< in: immediate result from check function */ { ibuf_use_t use; ut_a(var_ptr != NULL); ut_a(save != NULL); use = innodb_find_change_buffering_value( *static_cast(save)); ut_a(use < IBUF_USE_COUNT); ibuf_use = use; *static_cast(var_ptr) = *static_cast(save); } static int show_innodb_vars(THD *thd, SHOW_VAR *var, char *buff) { innodb_export_status(); var->type= SHOW_ARRAY; var->value= (char *) &innodb_status_variables; return 0; } /*********************************************************************** This function checks each index name for a table against reserved system default primary index name 'GEN_CLUST_INDEX'. If a name matches, this function pushes an warning message to the client, and returns true. */ extern "C" UNIV_INTERN bool innobase_index_name_is_reserved( /*============================*/ /* out: true if an index name matches the reserved name */ const trx_t* trx, /* in: InnoDB transaction handle */ const KEY* key_info, /* in: Indexes to be created */ ulint num_of_keys) /* in: Number of indexes to be created. */ { const KEY* key; uint key_num; /* index number */ for (key_num = 0; key_num < num_of_keys; key_num++) { key = &key_info[key_num]; if (innobase_strcasecmp(key->name, innobase_index_reserve_name) == 0) { /* Push warning to mysql */ push_warning_printf((THD*) trx->mysql_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WRONG_NAME_FOR_INDEX, "Cannot Create Index with name " "'%s'. The name is reserved " "for the system default primary " "index.", innobase_index_reserve_name); my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), innobase_index_reserve_name); return(true); } } return(false); } static SHOW_VAR innodb_status_variables_export[]= { {"Innodb", (char*) &show_innodb_vars, SHOW_FUNC}, {NullS, NullS, SHOW_LONG} }; static struct st_mysql_storage_engine innobase_storage_engine= { MYSQL_HANDLERTON_INTERFACE_VERSION }; /* plugin options */ static MYSQL_SYSVAR_BOOL(checksums, innobase_use_checksums, PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY, "Enable InnoDB checksums validation (enabled by default). " "Disable with --skip-innodb-checksums.", NULL, NULL, TRUE); static MYSQL_SYSVAR_STR(data_home_dir, innobase_data_home_dir, PLUGIN_VAR_READONLY, "The common part for InnoDB table spaces.", NULL, NULL, NULL); static MYSQL_SYSVAR_BOOL(doublewrite, innobase_use_doublewrite, PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY, "Enable InnoDB doublewrite buffer (enabled by default). " "Disable with --skip-innodb-doublewrite.", NULL, NULL, TRUE); static MYSQL_SYSVAR_ULONG(io_capacity, srv_io_capacity, PLUGIN_VAR_RQCMDARG, "Number of IOPs the server can do. Tunes the background IO rate", NULL, NULL, 200, 100, ~0L, 0); static MYSQL_SYSVAR_ULONG(fast_shutdown, innobase_fast_shutdown, PLUGIN_VAR_OPCMDARG, "Speeds up the shutdown process of the InnoDB storage engine. Possible " "values are 0, 1 (faster)" /* NetWare can't close unclosed files, can't automatically kill remaining threads, etc, so on this OS we disable the crash-like InnoDB shutdown. */ IF_NETWARE("", " or 2 (fastest - crash-like)") ".", NULL, NULL, 1, 0, IF_NETWARE(1,2), 0); static MYSQL_SYSVAR_BOOL(file_per_table, srv_file_per_table, PLUGIN_VAR_NOCMDARG, "Stores each InnoDB table to an .ibd file in the database dir.", NULL, NULL, FALSE); static MYSQL_SYSVAR_STR(file_format, innobase_file_format_name, PLUGIN_VAR_RQCMDARG, "File format to use for new tables in .ibd files.", innodb_file_format_name_validate, innodb_file_format_name_update, "Antelope"); /* If a new file format is introduced, the file format name needs to be updated accordingly. Please refer to file_format_name_map[] defined in trx0sys.c for the next file format name. */ static MYSQL_SYSVAR_STR(file_format_check, innobase_file_format_check, PLUGIN_VAR_OPCMDARG, "The highest file format in the tablespace.", innodb_file_format_check_validate, innodb_file_format_check_update, "Barracuda"); static MYSQL_SYSVAR_ULONG(flush_log_at_trx_commit, srv_flush_log_at_trx_commit, PLUGIN_VAR_OPCMDARG, "Set to 0 (write and flush once per second)," " 1 (write and flush at each commit)" " or 2 (write at commit, flush once per second).", NULL, NULL, 1, 0, 2, 0); static MYSQL_SYSVAR_STR(flush_method, innobase_file_flush_method, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "With which method to flush data.", NULL, NULL, NULL); static MYSQL_SYSVAR_BOOL(locks_unsafe_for_binlog, innobase_locks_unsafe_for_binlog, PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY, "Force InnoDB to not use next-key locking, to use only row-level locking.", NULL, NULL, FALSE); #ifdef UNIV_LOG_ARCHIVE static MYSQL_SYSVAR_STR(log_arch_dir, innobase_log_arch_dir, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Where full logs should be archived.", NULL, NULL, NULL); static MYSQL_SYSVAR_BOOL(log_archive, innobase_log_archive, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY, "Set to 1 if you want to have logs archived.", NULL, NULL, FALSE); #endif /* UNIV_LOG_ARCHIVE */ static MYSQL_SYSVAR_STR(log_group_home_dir, innobase_log_group_home_dir, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Path to InnoDB log files.", NULL, NULL, NULL); static MYSQL_SYSVAR_ULONG(max_dirty_pages_pct, srv_max_buf_pool_modified_pct, PLUGIN_VAR_RQCMDARG, "Percentage of dirty pages allowed in bufferpool.", NULL, NULL, 75, 0, 99, 0); static MYSQL_SYSVAR_BOOL(adaptive_flushing, srv_adaptive_flushing, PLUGIN_VAR_NOCMDARG, "Attempt flushing dirty pages to avoid IO bursts at checkpoints.", NULL, NULL, TRUE); static MYSQL_SYSVAR_ULONG(max_purge_lag, srv_max_purge_lag, PLUGIN_VAR_RQCMDARG, "Desired maximum length of the purge queue (0 = no limit)", NULL, NULL, 0, 0, ~0L, 0); static MYSQL_SYSVAR_BOOL(rollback_on_timeout, innobase_rollback_on_timeout, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY, "Roll back the complete transaction on lock wait timeout, for 4.x compatibility (disabled by default)", NULL, NULL, FALSE); static MYSQL_SYSVAR_BOOL(status_file, innobase_create_status_file, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_NOSYSVAR, "Enable SHOW INNODB STATUS output in the innodb_status. file", NULL, NULL, FALSE); static MYSQL_SYSVAR_BOOL(stats_on_metadata, innobase_stats_on_metadata, PLUGIN_VAR_OPCMDARG, "Enable statistics gathering for metadata commands such as SHOW TABLE STATUS (on by default)", NULL, NULL, TRUE); static MYSQL_SYSVAR_ULONGLONG(stats_sample_pages, srv_stats_sample_pages, PLUGIN_VAR_RQCMDARG, "The number of index pages to sample when calculating statistics (default 8)", NULL, NULL, 8, 1, ~0ULL, 0); static MYSQL_SYSVAR_BOOL(adaptive_hash_index, btr_search_enabled, PLUGIN_VAR_OPCMDARG, "Enable InnoDB adaptive hash index (enabled by default). " "Disable with --skip-innodb-adaptive-hash-index.", NULL, innodb_adaptive_hash_index_update, TRUE); static MYSQL_SYSVAR_ULONG(replication_delay, srv_replication_delay, PLUGIN_VAR_RQCMDARG, "Replication thread delay (ms) on the slave server if " "innodb_thread_concurrency is reached (0 by default)", NULL, NULL, 0, 0, ~0UL, 0); static MYSQL_SYSVAR_LONG(additional_mem_pool_size, innobase_additional_mem_pool_size, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Size of a memory pool InnoDB uses to store data dictionary information and other internal data structures.", NULL, NULL, 8*1024*1024L, 512*1024L, LONG_MAX, 1024); static MYSQL_SYSVAR_ULONG(autoextend_increment, srv_auto_extend_increment, PLUGIN_VAR_RQCMDARG, "Data file autoextend increment in megabytes", NULL, NULL, 8L, 1L, 1000L, 0); static MYSQL_SYSVAR_LONGLONG(buffer_pool_size, innobase_buffer_pool_size, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "The size of the memory buffer InnoDB uses to cache data and indexes of its tables.", NULL, NULL, 128*1024*1024L, 5*1024*1024L, LONGLONG_MAX, 1024*1024L); static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency, PLUGIN_VAR_RQCMDARG, "Helps in performance tuning in heavily concurrent environments.", innobase_commit_concurrency_validate, NULL, 0, 0, 1000, 0); static MYSQL_SYSVAR_ULONG(concurrency_tickets, srv_n_free_tickets_to_enter, PLUGIN_VAR_RQCMDARG, "Number of times a thread is allowed to enter InnoDB within the same SQL query after it has once got the ticket", NULL, NULL, 500L, 1L, ~0L, 0); static MYSQL_SYSVAR_LONG(file_io_threads, innobase_file_io_threads, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY | PLUGIN_VAR_NOSYSVAR, "Number of file I/O threads in InnoDB.", NULL, NULL, 4, 4, 64, 0); static MYSQL_SYSVAR_ULONG(read_io_threads, innobase_read_io_threads, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Number of background read I/O threads in InnoDB.", NULL, NULL, 4, 1, 64, 0); static MYSQL_SYSVAR_ULONG(write_io_threads, innobase_write_io_threads, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Number of background write I/O threads in InnoDB.", NULL, NULL, 4, 1, 64, 0); static MYSQL_SYSVAR_LONG(force_recovery, innobase_force_recovery, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Helps to save your data in case the disk image of the database becomes corrupt.", NULL, NULL, 0, 0, 6, 0); static MYSQL_SYSVAR_LONG(log_buffer_size, innobase_log_buffer_size, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "The size of the buffer which InnoDB uses to write log to the log files on disk.", NULL, NULL, 8*1024*1024L, 256*1024L, LONG_MAX, 1024); static MYSQL_SYSVAR_LONGLONG(log_file_size, innobase_log_file_size, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Size of each log file in a log group.", NULL, NULL, 5*1024*1024L, 1*1024*1024L, LONGLONG_MAX, 1024*1024L); static MYSQL_SYSVAR_LONG(log_files_in_group, innobase_log_files_in_group, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Number of log files in the log group. InnoDB writes to the files in a circular fashion. Value 3 is recommended here.", NULL, NULL, 2, 2, 100, 0); static MYSQL_SYSVAR_LONG(mirrored_log_groups, innobase_mirrored_log_groups, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Number of identical copies of log groups we keep for the database. Currently this should be set to 1.", NULL, NULL, 1, 1, 10, 0); static MYSQL_SYSVAR_UINT(old_blocks_pct, innobase_old_blocks_pct, PLUGIN_VAR_RQCMDARG, "Percentage of the buffer pool to reserve for 'old' blocks.", NULL, innodb_old_blocks_pct_update, 100 * 3 / 8, 5, 95, 0); static MYSQL_SYSVAR_UINT(old_blocks_time, buf_LRU_old_threshold_ms, PLUGIN_VAR_RQCMDARG, "Move blocks to the 'new' end of the buffer pool if the first access" " was at least this many milliseconds ago." " The timeout is disabled if 0 (the default).", NULL, NULL, 0, 0, UINT_MAX32, 0); static MYSQL_SYSVAR_LONG(open_files, innobase_open_files, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "How many files at the maximum InnoDB keeps open at the same time.", NULL, NULL, 300L, 10L, LONG_MAX, 0); static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds, PLUGIN_VAR_RQCMDARG, "Count of spin-loop rounds in InnoDB mutexes (30 by default)", NULL, NULL, 30L, 0L, ~0L, 0); static MYSQL_SYSVAR_ULONG(spin_wait_delay, srv_spin_wait_delay, PLUGIN_VAR_OPCMDARG, "Maximum delay between polling for a spin lock (6 by default)", NULL, NULL, 6L, 0L, ~0L, 0); static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency, PLUGIN_VAR_RQCMDARG, "Helps in performance tuning in heavily concurrent environments. Sets the maximum number of threads allowed inside InnoDB. Value 0 will disable the thread throttling.", NULL, NULL, 0, 0, 1000, 0); static MYSQL_SYSVAR_ULONG(thread_sleep_delay, srv_thread_sleep_delay, PLUGIN_VAR_RQCMDARG, "Time of innodb thread sleeping before joining InnoDB queue (usec). Value 0 disable a sleep", NULL, NULL, 10000L, 0L, ~0L, 0); static MYSQL_SYSVAR_STR(data_file_path, innobase_data_file_path, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "Path to individual files and their sizes.", NULL, NULL, NULL); static MYSQL_SYSVAR_LONG(autoinc_lock_mode, innobase_autoinc_lock_mode, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, "The AUTOINC lock modes supported by InnoDB: " "0 => Old style AUTOINC locking (for backward" " compatibility) " "1 => New style AUTOINC locking " "2 => No AUTOINC locking (unsafe for SBR)", NULL, NULL, AUTOINC_NEW_STYLE_LOCKING, /* Default setting */ AUTOINC_OLD_STYLE_LOCKING, /* Minimum value */ AUTOINC_NO_LOCKING, 0); /* Maximum value */ static MYSQL_SYSVAR_STR(version, innodb_version_str, PLUGIN_VAR_NOCMDOPT | PLUGIN_VAR_READONLY, "InnoDB version", NULL, NULL, INNODB_VERSION_STR); static MYSQL_SYSVAR_BOOL(use_sys_malloc, srv_use_sys_malloc, PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY, "Use OS memory allocator instead of InnoDB's internal memory allocator", NULL, NULL, TRUE); static MYSQL_SYSVAR_STR(change_buffering, innobase_change_buffering, PLUGIN_VAR_RQCMDARG, "Buffer changes to reduce random access: " "OFF, ON, none, inserts.", innodb_change_buffering_validate, innodb_change_buffering_update, "inserts"); static MYSQL_SYSVAR_ENUM(stats_method, srv_innodb_stats_method, PLUGIN_VAR_RQCMDARG, "Specifies how InnoDB index statistics collection code should " "treat NULLs. Possible values are NULLS_EQUAL (default), " "NULLS_UNEQUAL and NULLS_IGNORED", NULL, NULL, SRV_STATS_NULLS_EQUAL, &innodb_stats_method_typelib); #if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG static MYSQL_SYSVAR_UINT(change_buffering_debug, ibuf_debug, PLUGIN_VAR_RQCMDARG, "Debug flags for InnoDB change buffering (0=none)", NULL, NULL, 0, 0, 1, 0); #endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */ static MYSQL_SYSVAR_ULONG(read_ahead_threshold, srv_read_ahead_threshold, PLUGIN_VAR_RQCMDARG, "Number of pages that must be accessed sequentially for InnoDB to " "trigger a readahead.", NULL, NULL, 56, 0, 64, 0); static struct st_mysql_sys_var* innobase_system_variables[]= { MYSQL_SYSVAR(additional_mem_pool_size), MYSQL_SYSVAR(autoextend_increment), MYSQL_SYSVAR(buffer_pool_size), MYSQL_SYSVAR(checksums), MYSQL_SYSVAR(commit_concurrency), MYSQL_SYSVAR(concurrency_tickets), MYSQL_SYSVAR(data_file_path), MYSQL_SYSVAR(data_home_dir), MYSQL_SYSVAR(doublewrite), MYSQL_SYSVAR(fast_shutdown), MYSQL_SYSVAR(file_io_threads), MYSQL_SYSVAR(read_io_threads), MYSQL_SYSVAR(write_io_threads), MYSQL_SYSVAR(file_per_table), MYSQL_SYSVAR(file_format), MYSQL_SYSVAR(file_format_check), MYSQL_SYSVAR(flush_log_at_trx_commit), MYSQL_SYSVAR(flush_method), MYSQL_SYSVAR(force_recovery), MYSQL_SYSVAR(locks_unsafe_for_binlog), MYSQL_SYSVAR(lock_wait_timeout), #ifdef UNIV_LOG_ARCHIVE MYSQL_SYSVAR(log_arch_dir), MYSQL_SYSVAR(log_archive), #endif /* UNIV_LOG_ARCHIVE */ MYSQL_SYSVAR(log_buffer_size), MYSQL_SYSVAR(log_file_size), MYSQL_SYSVAR(log_files_in_group), MYSQL_SYSVAR(log_group_home_dir), MYSQL_SYSVAR(max_dirty_pages_pct), MYSQL_SYSVAR(adaptive_flushing), MYSQL_SYSVAR(max_purge_lag), MYSQL_SYSVAR(mirrored_log_groups), MYSQL_SYSVAR(old_blocks_pct), MYSQL_SYSVAR(old_blocks_time), MYSQL_SYSVAR(open_files), MYSQL_SYSVAR(rollback_on_timeout), MYSQL_SYSVAR(stats_on_metadata), MYSQL_SYSVAR(stats_sample_pages), MYSQL_SYSVAR(adaptive_hash_index), MYSQL_SYSVAR(stats_method), MYSQL_SYSVAR(replication_delay), MYSQL_SYSVAR(status_file), MYSQL_SYSVAR(strict_mode), MYSQL_SYSVAR(support_xa), MYSQL_SYSVAR(sync_spin_loops), MYSQL_SYSVAR(spin_wait_delay), MYSQL_SYSVAR(table_locks), MYSQL_SYSVAR(thread_concurrency), MYSQL_SYSVAR(thread_sleep_delay), MYSQL_SYSVAR(autoinc_lock_mode), MYSQL_SYSVAR(version), MYSQL_SYSVAR(use_sys_malloc), MYSQL_SYSVAR(change_buffering), #if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG MYSQL_SYSVAR(change_buffering_debug), #endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */ MYSQL_SYSVAR(read_ahead_threshold), MYSQL_SYSVAR(io_capacity), NULL }; mysql_declare_plugin(innodb_plugin) { MYSQL_STORAGE_ENGINE_PLUGIN, &innobase_storage_engine, innobase_hton_name, "Innobase Oy", "Supports transactions, row-level locking, and foreign keys", PLUGIN_LICENSE_GPL, innobase_init, /* Plugin Init */ NULL, /* Plugin Deinit */ INNODB_VERSION_SHORT, innodb_status_variables_export,/* status variables */ innobase_system_variables, /* system variables */ NULL /* reserved */ }, i_s_innodb_trx, i_s_innodb_locks, i_s_innodb_lock_waits, i_s_innodb_cmp, i_s_innodb_cmp_reset, i_s_innodb_cmpmem, i_s_innodb_cmpmem_reset mysql_declare_plugin_end; /** @brief Initialize the default value of innodb_commit_concurrency. Once InnoDB is running, the innodb_commit_concurrency must not change from zero to nonzero. (Bug #42101) The initial default value is 0, and without this extra initialization, SET GLOBAL innodb_commit_concurrency=DEFAULT would set the parameter to 0, even if it was initially set to nonzero at the command line or configuration file. */ static void innobase_commit_concurrency_init_default(void) /*==========================================*/ { MYSQL_SYSVAR_NAME(commit_concurrency).def_val = innobase_commit_concurrency; } #ifdef UNIV_COMPILE_TEST_FUNCS typedef struct innobase_convert_name_test_struct { char* buf; ulint buflen; const char* id; ulint idlen; void* thd; ibool file_id; const char* expected; } innobase_convert_name_test_t; void test_innobase_convert_name() { char buf[1024]; ulint i; innobase_convert_name_test_t test_input[] = { {buf, sizeof(buf), "abcd", 4, NULL, TRUE, "\"abcd\""}, {buf, 7, "abcd", 4, NULL, TRUE, "\"abcd\""}, {buf, 6, "abcd", 4, NULL, TRUE, "\"abcd\""}, {buf, 5, "abcd", 4, NULL, TRUE, "\"abc\""}, {buf, 4, "abcd", 4, NULL, TRUE, "\"ab\""}, {buf, sizeof(buf), "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""}, {buf, 9, "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""}, {buf, 8, "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""}, {buf, 7, "ab@0060cd", 9, NULL, TRUE, "\"ab`cd\""}, {buf, 6, "ab@0060cd", 9, NULL, TRUE, "\"ab`c\""}, {buf, 5, "ab@0060cd", 9, NULL, TRUE, "\"ab`\""}, {buf, 4, "ab@0060cd", 9, NULL, TRUE, "\"ab\""}, {buf, sizeof(buf), "ab\"cd", 5, NULL, TRUE, "\"#mysql50#ab\"\"cd\""}, {buf, 17, "ab\"cd", 5, NULL, TRUE, "\"#mysql50#ab\"\"cd\""}, {buf, 16, "ab\"cd", 5, NULL, TRUE, "\"#mysql50#ab\"\"c\""}, {buf, 15, "ab\"cd", 5, NULL, TRUE, "\"#mysql50#ab\"\"\""}, {buf, 14, "ab\"cd", 5, NULL, TRUE, "\"#mysql50#ab\""}, {buf, 13, "ab\"cd", 5, NULL, TRUE, "\"#mysql50#ab\""}, {buf, 12, "ab\"cd", 5, NULL, TRUE, "\"#mysql50#a\""}, {buf, 11, "ab\"cd", 5, NULL, TRUE, "\"#mysql50#\""}, {buf, 10, "ab\"cd", 5, NULL, TRUE, "\"#mysql50\""}, {buf, sizeof(buf), "ab/cd", 5, NULL, TRUE, "\"ab\".\"cd\""}, {buf, 9, "ab/cd", 5, NULL, TRUE, "\"ab\".\"cd\""}, {buf, 8, "ab/cd", 5, NULL, TRUE, "\"ab\".\"c\""}, {buf, 7, "ab/cd", 5, NULL, TRUE, "\"ab\".\"\""}, {buf, 6, "ab/cd", 5, NULL, TRUE, "\"ab\"."}, {buf, 5, "ab/cd", 5, NULL, TRUE, "\"ab\"."}, {buf, 4, "ab/cd", 5, NULL, TRUE, "\"ab\""}, {buf, 3, "ab/cd", 5, NULL, TRUE, "\"a\""}, {buf, 2, "ab/cd", 5, NULL, TRUE, "\"\""}, /* XXX probably "" is a better result in this case {buf, 1, "ab/cd", 5, NULL, TRUE, "."}, */ {buf, 0, "ab/cd", 5, NULL, TRUE, ""}, }; for (i = 0; i < sizeof(test_input) / sizeof(test_input[0]); i++) { char* end; ibool ok = TRUE; size_t res_len; fprintf(stderr, "TESTING %lu, %s, %lu, %s\n", test_input[i].buflen, test_input[i].id, test_input[i].idlen, test_input[i].expected); end = innobase_convert_name( test_input[i].buf, test_input[i].buflen, test_input[i].id, test_input[i].idlen, test_input[i].thd, test_input[i].file_id); res_len = (size_t) (end - test_input[i].buf); if (res_len != strlen(test_input[i].expected)) { fprintf(stderr, "unexpected len of the result: %u, " "expected: %u\n", (unsigned) res_len, (unsigned) strlen(test_input[i].expected)); ok = FALSE; } if (memcmp(test_input[i].buf, test_input[i].expected, strlen(test_input[i].expected)) != 0 || !ok) { fprintf(stderr, "unexpected result: %.*s, " "expected: %s\n", (int) res_len, test_input[i].buf, test_input[i].expected); ok = FALSE; } if (ok) { fprintf(stderr, "OK: res: %.*s\n\n", (int) res_len, buf); } else { fprintf(stderr, "FAILED\n\n"); return; } } } #endif /* UNIV_COMPILE_TEST_FUNCS */