diff --git a/storage/innobase/row/row0mysql.cc b/storage/innobase/row/row0mysql.cc index 74a17b9a1c3..4a39fc311b0 100644 --- a/storage/innobase/row/row0mysql.cc +++ b/storage/innobase/row/row0mysql.cc @@ -73,7 +73,7 @@ UNIV_INTERN ibool row_rollback_on_timeout = FALSE; /** Chain node of the list of tables to drop in the background. */ struct row_mysql_drop_t{ - char* table_name; /*!< table name */ + table_id_t table_id; /*!< table id */ UT_LIST_NODE_T(row_mysql_drop_t)row_mysql_drop_list; /*!< list chain node */ }; @@ -136,19 +136,6 @@ row_mysql_is_system_table( || 0 == strcmp(name + 6, "db")); } -/*********************************************************************//** -If a table is not yet in the drop list, adds the table to the list of tables -which the master thread drops in background. We need this on Unix because in -ALTER TABLE MySQL may call drop table even if the table has running queries on -it. Also, if there are running foreign key checks on the table, we drop the -table lazily. -@return TRUE if the table was not yet in the drop list, and was added there */ -static -ibool -row_add_table_to_background_drop_list( -/*==================================*/ - const char* name); /*!< in: table name */ - /*******************************************************************//** Delays an INSERT, DELETE or UPDATE operation if the purge is lagging. */ static @@ -2727,7 +2714,7 @@ loop: mutex_enter(&row_drop_list_mutex); ut_a(row_mysql_drop_list_inited); - +next: drop = UT_LIST_GET_FIRST(row_mysql_drop_list); n_tables = UT_LIST_GET_LEN(row_mysql_drop_list); @@ -2740,62 +2727,39 @@ loop: return(n_tables + n_tables_dropped); } - DBUG_EXECUTE_IF("row_drop_tables_in_background_sleep", - os_thread_sleep(5000000); - ); + table = dict_table_open_on_id(drop->table_id, FALSE, + DICT_TABLE_OP_NORMAL); - table = dict_table_open_on_name(drop->table_name, FALSE, FALSE, - DICT_ERR_IGNORE_NONE); - - if (table == NULL) { - /* If for some reason the table has already been dropped - through some other mechanism, do not try to drop it */ - - goto already_dropped; - } - - if (!table->to_be_dropped) { - /* There is a scenario: the old table is dropped - just after it's added into drop list, and new - table with the same name is created, then we try - to drop the new table in background. */ - dict_table_close(table, FALSE, FALSE); - - goto already_dropped; + if (!table) { + n_tables_dropped++; + mutex_enter(&row_drop_list_mutex); + UT_LIST_REMOVE(row_mysql_drop_list, row_mysql_drop_list, drop); + MONITOR_DEC(MONITOR_BACKGROUND_DROP_TABLE); + ut_free(drop); + goto next; } ut_a(!table->can_be_evicted); + if (!table->to_be_dropped) { + dict_table_close(table, FALSE, FALSE); + + mutex_enter(&row_drop_list_mutex); + UT_LIST_REMOVE(row_mysql_drop_list, row_mysql_drop_list, drop); + UT_LIST_ADD_LAST(row_mysql_drop_list, row_mysql_drop_list, + drop); + goto next; + } + dict_table_close(table, FALSE, FALSE); if (DB_SUCCESS != row_drop_table_for_mysql_in_background( - drop->table_name)) { + table->name)) { /* If the DROP fails for some table, we return, and let the main thread retry later */ - return(n_tables + n_tables_dropped); } - n_tables_dropped++; - -already_dropped: - mutex_enter(&row_drop_list_mutex); - - UT_LIST_REMOVE(row_mysql_drop_list, row_mysql_drop_list, drop); - - MONITOR_DEC(MONITOR_BACKGROUND_DROP_TABLE); - - ut_print_timestamp(stderr); - fputs(" InnoDB: Dropped table ", stderr); - ut_print_name(stderr, NULL, TRUE, drop->table_name); - fputs(" in background drop queue.\n", stderr); - - mem_free(drop->table_name); - - mem_free(drop); - - mutex_exit(&row_drop_list_mutex); - goto loop; } @@ -2827,14 +2791,13 @@ which the master thread drops in background. We need this on Unix because in ALTER TABLE MySQL may call drop table even if the table has running queries on it. Also, if there are running foreign key checks on the table, we drop the table lazily. -@return TRUE if the table was not yet in the drop list, and was added there */ +@return whether background DROP TABLE was scheduled for the first time */ static -ibool -row_add_table_to_background_drop_list( -/*==================================*/ - const char* name) /*!< in: table name */ +bool +row_add_table_to_background_drop_list(table_id_t table_id) { row_mysql_drop_t* drop; + bool added = true; mutex_enter(&row_drop_list_mutex); @@ -2845,31 +2808,21 @@ row_add_table_to_background_drop_list( drop != NULL; drop = UT_LIST_GET_NEXT(row_mysql_drop_list, drop)) { - if (strcmp(drop->table_name, name) == 0) { - /* Already in the list */ - - mutex_exit(&row_drop_list_mutex); - - return(FALSE); + if (drop->table_id == table_id) { + added = false; + goto func_exit; } } - drop = static_cast( - mem_alloc(sizeof(row_mysql_drop_t))); - - drop->table_name = mem_strdup(name); + drop = static_cast(ut_malloc(sizeof *drop)); + drop->table_id = table_id; UT_LIST_ADD_LAST(row_mysql_drop_list, row_mysql_drop_list, drop); MONITOR_INC(MONITOR_BACKGROUND_DROP_TABLE); - - /* fputs("InnoDB: Adding table ", stderr); - ut_print_name(stderr, trx, TRUE, drop->table_name); - fputs(" to background drop list\n", stderr); */ - +func_exit: mutex_exit(&row_drop_list_mutex); - - return(TRUE); + return added; } /*********************************************************************//** @@ -4043,7 +3996,7 @@ row_drop_table_for_mysql( DBUG_EXECUTE_IF("row_drop_table_add_to_background", - row_add_table_to_background_drop_list(table->name); + row_add_table_to_background_drop_list(table->id); err = DB_SUCCESS; goto funct_exit; ); @@ -4055,33 +4008,22 @@ row_drop_table_for_mysql( checks take an IS or IX lock on the table. */ if (table->n_foreign_key_checks_running > 0) { - - const char* save_tablename = table->name; - ibool added; - - added = row_add_table_to_background_drop_list(save_tablename); - - if (added) { + if (row_add_table_to_background_drop_list(table->id)) { ut_print_timestamp(stderr); fputs(" InnoDB: You are trying to drop table ", stderr); - ut_print_name(stderr, trx, TRUE, save_tablename); + ut_print_name(stderr, trx, TRUE, table->name); fputs("\n" "InnoDB: though there is a" " foreign key check running on it.\n" "InnoDB: Adding the table to" " the background drop queue.\n", stderr); - - /* We return DB_SUCCESS to MySQL though the drop will - happen lazily later */ - - err = DB_SUCCESS; - } else { - /* The table is already in the background drop list */ - err = DB_ERROR; } + /* We return DB_SUCCESS to MySQL though the drop will + happen lazily later */ + err = DB_SUCCESS; goto funct_exit; } @@ -4103,11 +4045,7 @@ row_drop_table_for_mysql( lock_remove_all_on_table(table, TRUE); ut_a(table->n_rec_locks == 0); } else if (table->n_ref_count > 0 || table->n_rec_locks > 0) { - ibool added; - - added = row_add_table_to_background_drop_list(table->name); - - if (added) { + if (row_add_table_to_background_drop_list(table->id)) { ut_print_timestamp(stderr); fputs(" InnoDB: Warning: MySQL is" " trying to drop table ", stderr); diff --git a/storage/xtradb/row/row0mysql.cc b/storage/xtradb/row/row0mysql.cc index ebdee381713..8a6e2728342 100644 --- a/storage/xtradb/row/row0mysql.cc +++ b/storage/xtradb/row/row0mysql.cc @@ -72,7 +72,7 @@ UNIV_INTERN ibool row_rollback_on_timeout = FALSE; /** Chain node of the list of tables to drop in the background. */ struct row_mysql_drop_t{ - char* table_name; /*!< table name */ + table_id_t table_id; /*!< table id */ UT_LIST_NODE_T(row_mysql_drop_t)row_mysql_drop_list; /*!< list chain node */ }; @@ -135,19 +135,6 @@ row_mysql_is_system_table( || 0 == strcmp(name + 6, "db")); } -/*********************************************************************//** -If a table is not yet in the drop list, adds the table to the list of tables -which the master thread drops in background. We need this on Unix because in -ALTER TABLE MySQL may call drop table even if the table has running queries on -it. Also, if there are running foreign key checks on the table, we drop the -table lazily. -@return TRUE if the table was not yet in the drop list, and was added there */ -static -ibool -row_add_table_to_background_drop_list( -/*==================================*/ - const char* name); /*!< in: table name */ - /*******************************************************************//** Delays an INSERT, DELETE or UPDATE operation if the purge is lagging. */ static @@ -2739,7 +2726,7 @@ loop: mutex_enter(&row_drop_list_mutex); ut_a(row_mysql_drop_list_inited); - +next: drop = UT_LIST_GET_FIRST(row_mysql_drop_list); n_tables = UT_LIST_GET_LEN(row_mysql_drop_list); @@ -2752,62 +2739,39 @@ loop: return(n_tables + n_tables_dropped); } - DBUG_EXECUTE_IF("row_drop_tables_in_background_sleep", - os_thread_sleep(5000000); - ); + table = dict_table_open_on_id(drop->table_id, FALSE, + DICT_TABLE_OP_NORMAL); - table = dict_table_open_on_name(drop->table_name, FALSE, FALSE, - DICT_ERR_IGNORE_NONE); - - if (table == NULL) { - /* If for some reason the table has already been dropped - through some other mechanism, do not try to drop it */ - - goto already_dropped; - } - - if (!table->to_be_dropped) { - /* There is a scenario: the old table is dropped - just after it's added into drop list, and new - table with the same name is created, then we try - to drop the new table in background. */ - dict_table_close(table, FALSE, FALSE); - - goto already_dropped; + if (!table) { + n_tables_dropped++; + mutex_enter(&row_drop_list_mutex); + UT_LIST_REMOVE(row_mysql_drop_list, row_mysql_drop_list, drop); + MONITOR_DEC(MONITOR_BACKGROUND_DROP_TABLE); + ut_free(drop); + goto next; } ut_a(!table->can_be_evicted); + if (!table->to_be_dropped) { + dict_table_close(table, FALSE, FALSE); + + mutex_enter(&row_drop_list_mutex); + UT_LIST_REMOVE(row_mysql_drop_list, row_mysql_drop_list, drop); + UT_LIST_ADD_LAST(row_mysql_drop_list, row_mysql_drop_list, + drop); + goto next; + } + dict_table_close(table, FALSE, FALSE); if (DB_SUCCESS != row_drop_table_for_mysql_in_background( - drop->table_name)) { + table->name)) { /* If the DROP fails for some table, we return, and let the main thread retry later */ - return(n_tables + n_tables_dropped); } - n_tables_dropped++; - -already_dropped: - mutex_enter(&row_drop_list_mutex); - - UT_LIST_REMOVE(row_mysql_drop_list, row_mysql_drop_list, drop); - - MONITOR_DEC(MONITOR_BACKGROUND_DROP_TABLE); - - ut_print_timestamp(stderr); - fputs(" InnoDB: Dropped table ", stderr); - ut_print_name(stderr, NULL, TRUE, drop->table_name); - fputs(" in background drop queue.\n", stderr); - - mem_free(drop->table_name); - - mem_free(drop); - - mutex_exit(&row_drop_list_mutex); - goto loop; } @@ -2839,14 +2803,13 @@ which the master thread drops in background. We need this on Unix because in ALTER TABLE MySQL may call drop table even if the table has running queries on it. Also, if there are running foreign key checks on the table, we drop the table lazily. -@return TRUE if the table was not yet in the drop list, and was added there */ +@return whether background DROP TABLE was scheduled for the first time */ static -ibool -row_add_table_to_background_drop_list( -/*==================================*/ - const char* name) /*!< in: table name */ +bool +row_add_table_to_background_drop_list(table_id_t table_id) { row_mysql_drop_t* drop; + bool added = true; mutex_enter(&row_drop_list_mutex); @@ -2857,31 +2820,21 @@ row_add_table_to_background_drop_list( drop != NULL; drop = UT_LIST_GET_NEXT(row_mysql_drop_list, drop)) { - if (strcmp(drop->table_name, name) == 0) { - /* Already in the list */ - - mutex_exit(&row_drop_list_mutex); - - return(FALSE); + if (drop->table_id == table_id) { + added = false; + goto func_exit; } } - drop = static_cast( - mem_alloc(sizeof(row_mysql_drop_t))); - - drop->table_name = mem_strdup(name); + drop = static_cast(ut_malloc(sizeof *drop)); + drop->table_id = table_id; UT_LIST_ADD_LAST(row_mysql_drop_list, row_mysql_drop_list, drop); MONITOR_INC(MONITOR_BACKGROUND_DROP_TABLE); - - /* fputs("InnoDB: Adding table ", stderr); - ut_print_name(stderr, trx, TRUE, drop->table_name); - fputs(" to background drop list\n", stderr); */ - +func_exit: mutex_exit(&row_drop_list_mutex); - - return(TRUE); + return added; } /*********************************************************************//** @@ -4057,7 +4010,7 @@ row_drop_table_for_mysql( DBUG_EXECUTE_IF("row_drop_table_add_to_background", - row_add_table_to_background_drop_list(table->name); + row_add_table_to_background_drop_list(table->id); err = DB_SUCCESS; goto funct_exit; ); @@ -4069,33 +4022,22 @@ row_drop_table_for_mysql( checks take an IS or IX lock on the table. */ if (table->n_foreign_key_checks_running > 0) { - - const char* save_tablename = table->name; - ibool added; - - added = row_add_table_to_background_drop_list(save_tablename); - - if (added) { + if (row_add_table_to_background_drop_list(table->id)) { ut_print_timestamp(stderr); fputs(" InnoDB: You are trying to drop table ", stderr); - ut_print_name(stderr, trx, TRUE, save_tablename); + ut_print_name(stderr, trx, TRUE, table->name); fputs("\n" "InnoDB: though there is a" " foreign key check running on it.\n" "InnoDB: Adding the table to" " the background drop queue.\n", stderr); - - /* We return DB_SUCCESS to MySQL though the drop will - happen lazily later */ - - err = DB_SUCCESS; - } else { - /* The table is already in the background drop list */ - err = DB_ERROR; } + /* We return DB_SUCCESS to MySQL though the drop will + happen lazily later */ + err = DB_SUCCESS; goto funct_exit; } @@ -4117,11 +4059,7 @@ row_drop_table_for_mysql( lock_remove_all_on_table(table, TRUE); ut_a(table->n_rec_locks == 0); } else if (table->n_ref_count > 0 || table->n_rec_locks > 0) { - ibool added; - - added = row_add_table_to_background_drop_list(table->name); - - if (added) { + if (row_add_table_to_background_drop_list(table->id)) { ut_print_timestamp(stderr); fputs(" InnoDB: Warning: MySQL is" " trying to drop table ", stderr);