/* Copyright (C) 2004-2005 MySQL AB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. 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 */ #include "event_priv.h" #include "event.h" #include "sp.h" /* TODO list : - The default value of created/modified should not be 0000-00-00 because of STRICT mode restricions. - CREATE EVENT should not go into binary log! Does it now? The SQL statements issued by the EVENT are replicated. I have an idea how to solve the problem at failover. So the status field will be ENUM('DISABLED', 'ENABLED', 'SLAVESIDE_DISABLED'). In this case when CREATE EVENT is replicated it should go into the binary as SLAVESIDE_DISABLED if it is ENABLED, when it's created as DISABLEd it should be replicated as disabled. If an event is ALTERed as DISABLED the query should go untouched into the binary log, when ALTERed as enable then it should go as SLAVESIDE_DISABLED. This is regarding the SQL interface. TT routines however modify mysql.event internally and this does not go the log so in this case queries has to be injected into the log...somehow... or maybe a solution is RBR for this case, because the event may go only from ENABLED to DISABLED status change and this is safe for replicating. As well an event may be deleted which is also safe for RBR. - Maybe move all allocations during parsing to evex_mem_root thus saving double parsing in evex_create_event! - If the server is killed (stopping) try to kill executing events? - What happens if one renames an event in the DB while it is in memory? Or even deleting it? - Consider using conditional variable when doing shutdown instead of waiting till all worker threads end. - Make event_timed::get_show_create_event() work - Add function documentation whenever needed. - Add logging to file - Move comparison code to class event_timed Warning: - For now parallel execution is not possible because the same sp_head cannot be executed few times!!! There is still no lock attached to particular event. */ QUEUE EVEX_EQ_NAME; MEM_ROOT evex_mem_root; void evex_queue_init(EVEX_QUEUE_TYPE *queue) { if (init_queue_ex(queue, 30 /*num_el*/, 0 /*offset*/, 0 /*smallest_on_top*/, event_timed_compare_q, NULL, 30 /*auto_extent*/)) sql_print_error("Insufficient memory to initialize executing queue."); } int sortcmp_lex_string(LEX_STRING s, LEX_STRING t, CHARSET_INFO *cs) { return cs->coll->strnncollsp(cs, (unsigned char *) s.str,s.length, (unsigned char *) t.str,t.length, 0); } int my_time_compare(TIME *a, TIME *b) { #ifdef ENABLE_WHEN_WE_HAVE_MILLISECOND_IN_TIMESTAMPS my_ulonglong a_t= TIME_to_ulonglong_datetime(a)*100L + a->second_part; my_ulonglong b_t= TIME_to_ulonglong_datetime(b)*100L + b->second_part; #else my_ulonglong a_t= TIME_to_ulonglong_datetime(a); my_ulonglong b_t= TIME_to_ulonglong_datetime(b); #endif if (a_t > b_t) return 1; else if (a_t < b_t) return -1; return 0; } int event_timed_compare(event_timed *a, event_timed *b) { return my_time_compare(&a->execute_at, &b->execute_at); } /* Callback for the prio queue */ int event_timed_compare_q(void *vptr, byte* a, byte *b) { return event_timed_compare((event_timed *)a, (event_timed *)b); } /* Open mysql.event table for read SYNOPSIS evex_open_event_table_for_read() thd Thread context lock_type How to lock the table table The table pointer RETURN 1 Cannot lock table 2 The table is corrupted - different number of fields 0 OK */ int evex_open_event_table(THD *thd, enum thr_lock_type lock_type, TABLE **table) { TABLE_LIST tables; bool not_used; DBUG_ENTER("open_proc_table"); bzero((char*) &tables, sizeof(tables)); tables.db= (char*) "mysql"; tables.table_name= tables.alias= (char*) "event"; tables.lock_type= lock_type; if (simple_open_n_lock_tables(thd, &tables)) DBUG_RETURN(1); if (tables.table->s->fields != EVEX_FIELD_COUNT) { my_error(ER_EVENT_COL_COUNT_DOESNT_MATCH, MYF(0), "mysql", "event"); close_thread_tables(thd); DBUG_RETURN(2); } *table= tables.table; DBUG_RETURN(0); } /* Find row in open mysql.event table representing event SYNOPSIS evex_db_find_event_aux() thd Thread context dbname Name of event's database rname Name of the event inside the db table TABLE object for open mysql.event table. RETURN VALUE 0 - Routine found EVEX_KEY_NOT_FOUND - No routine with given name */ int evex_db_find_event_aux(THD *thd, const LEX_STRING dbname, const LEX_STRING ev_name, const LEX_STRING user_name, TABLE *table) { byte key[MAX_KEY_LENGTH]; DBUG_ENTER("evex_db_find_event_aux"); DBUG_PRINT("enter", ("name: %.*s", ev_name.length, ev_name.str)); /* Create key to find row. We have to use field->store() to be able to handle VARCHAR and CHAR fields. Assumption here is that the two first fields in the table are 'db' and 'name' and the first key is the primary key over the same fields. */ if (dbname.length > table->field[EVEX_FIELD_DB]->field_length || ev_name.length > table->field[EVEX_FIELD_NAME]->field_length || user_name.length > table->field[EVEX_FIELD_DEFINER]->field_length) DBUG_RETURN(EVEX_KEY_NOT_FOUND); table->field[EVEX_FIELD_DB]->store(dbname.str, dbname.length, &my_charset_bin); table->field[EVEX_FIELD_NAME]->store(ev_name.str, ev_name.length, &my_charset_bin); table->field[EVEX_FIELD_DEFINER]->store(user_name.str, user_name.length, &my_charset_bin); key_copy(key, table->record[0], table->key_info, table->key_info->key_length); if (table->file->index_read_idx(table->record[0], 0, key, table->key_info->key_length,HA_READ_KEY_EXACT)) DBUG_RETURN(EVEX_KEY_NOT_FOUND); DBUG_RETURN(0); } /* Puts some data common to CREATE and ALTER EVENT into a row. SYNOPSIS evex_fill_row() thd THD table the row to fill out et Event's data Returns 0 - ok EVEX_GENERAL_ERROR - bad data EVEX_GET_FIELD_FAILED - field count does not match. table corrupted? DESCRIPTION Used both when an event is created and when it is altered. */ static int evex_fill_row(THD *thd, TABLE *table, event_timed *et, my_bool is_update) { enum evex_table_field field_num; DBUG_ENTER("evex_fill_row"); if (table->s->fields != EVEX_FIELD_COUNT) { my_error(ER_EVENT_COL_COUNT_DOESNT_MATCH, MYF(0), "mysql", "event"); DBUG_RETURN(EVEX_GET_FIELD_FAILED); } DBUG_PRINT("info", ("dbname.len=[%s]",et->dbname.str)); DBUG_PRINT("info", ("name.len=[%s]",et->name.str)); DBUG_PRINT("info", ("body=[%s]",et->body.str)); if (table->field[field_num= EVEX_FIELD_DB]-> store(et->dbname.str, et->dbname.length, system_charset_info)) goto trunc_err; if (table->field[field_num= EVEX_FIELD_NAME]-> store(et->name.str, et->name.length, system_charset_info)) goto trunc_err; // both ON_COMPLETION and STATUS are NOT NULL thus not calling set_notnull() table->field[EVEX_FIELD_ON_COMPLETION]->store((longlong)et->on_completion); table->field[EVEX_FIELD_STATUS]->store((longlong)et->status); if (et->body.str) if (table->field[field_num= EVEX_FIELD_BODY]-> store(et->body.str, et->body.length, system_charset_info)) goto trunc_err; if (et->starts.year) { table->field[EVEX_FIELD_STARTS]->set_notnull();// set NULL flag to OFF table->field[EVEX_FIELD_STARTS]-> store_time(&et->starts, MYSQL_TIMESTAMP_DATETIME); } if (et->ends.year) { table->field[EVEX_FIELD_ENDS]->set_notnull(); table->field[EVEX_FIELD_ENDS]-> store_time(&et->ends, MYSQL_TIMESTAMP_DATETIME); } if (et->expression) { table->field[EVEX_FIELD_INTERVAL_EXPR]->set_notnull(); table->field[EVEX_FIELD_INTERVAL_EXPR]->store((longlong)et->expression); table->field[EVEX_FIELD_TRANSIENT_INTERVAL]->set_notnull(); /* In the enum (C) intervals start from 0 but in mysql enum valid values start from 1. Thus +1 offset is needed! */ table->field[EVEX_FIELD_TRANSIENT_INTERVAL]->store((longlong)et->interval+1); table->field[EVEX_FIELD_EXECUTE_AT]->set_null(); } else if (et->execute_at.year) { // fix_fields already called in init_execute_at table->field[EVEX_FIELD_INTERVAL_EXPR]->set_null(); table->field[EVEX_FIELD_TRANSIENT_INTERVAL]->set_null(); table->field[EVEX_FIELD_EXECUTE_AT]->set_notnull(); table->field[EVEX_FIELD_EXECUTE_AT]->store_time(&et->execute_at, MYSQL_TIMESTAMP_DATETIME); table->field[EVEX_FIELD_TRANSIENT_INTERVAL]->set_null(); } else { DBUG_ASSERT(is_update); // it is normal to be here when the action is update // this is an error if the action is create. something is borked } ((Field_timestamp *)table->field[EVEX_FIELD_MODIFIED])->set_time(); if (et->comment.length) if (table->field[field_num= EVEX_FIELD_COMMENT]-> store(et->comment.str, et->comment.length, system_charset_info)) goto trunc_err; DBUG_RETURN(0); trunc_err: my_error(ER_EVENT_DATA_TOO_LONG, MYF(0)); DBUG_RETURN(EVEX_GENERAL_ERROR); } /* Creates an event in mysql.event SYNOPSIS db_create_event() thd THD et event_timed object containing information for the event create_if_not - if an warning should be generated in case event exists rows_affected - how many rows were affected Return value 0 - OK EVEX_GENERAL_ERROR - Failure DESCRIPTION Creates an event. Relies on evex_fill_row which is shared with db_update_event. The name of the event is inside "et". */ static int db_create_event(THD *thd, event_timed *et, my_bool create_if_not, uint *rows_affected) { int ret= 0; TABLE *table; char definer[HOSTNAME_LENGTH+USERNAME_LENGTH+2]; char olddb[128]; bool dbchanged= false; DBUG_ENTER("db_create_event"); DBUG_PRINT("enter", ("name: %.*s", et->name.length, et->name.str)); *rows_affected= 0; DBUG_PRINT("info", ("open mysql.event for update")); if (evex_open_event_table(thd, TL_WRITE, &table)) { my_error(ER_EVENT_OPEN_TABLE_FAILED, MYF(0)); goto err; } DBUG_PRINT("info", ("check existance of an event with the same name")); if (!evex_db_find_event_aux(thd, et->dbname, et->name, et->definer, table)) { if (create_if_not) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_EVENT_ALREADY_EXISTS, ER(ER_EVENT_ALREADY_EXISTS), et->name.str); goto ok; } my_error(ER_EVENT_ALREADY_EXISTS, MYF(0), et->name.str); goto err; } DBUG_PRINT("info", ("non-existant, go forward")); if ((ret= sp_use_new_db(thd, et->dbname.str,olddb, sizeof(olddb),0, &dbchanged))) { my_error(ER_BAD_DB_ERROR, MYF(0)); goto err; } restore_record(table, s->default_values); // Get default values for fields if (system_charset_info->cset->numchars(system_charset_info, et->dbname.str, et->dbname.str + et->dbname.length) > EVEX_DB_FIELD_LEN) { my_error(ER_TOO_LONG_IDENT, MYF(0), et->dbname.str); goto err; } if (system_charset_info->cset->numchars(system_charset_info, et->name.str, et->name.str + et->name.length) > EVEX_DB_FIELD_LEN) { my_error(ER_TOO_LONG_IDENT, MYF(0), et->name.str); goto err; } if (et->body.length > table->field[EVEX_FIELD_BODY]->field_length) { my_error(ER_TOO_LONG_BODY, MYF(0), et->name.str); goto err; } if (!(et->expression) && !(et->execute_at.year)) { DBUG_PRINT("error", ("neither expression nor execute_at are set!")); my_error(ER_EVENT_NEITHER_M_EXPR_NOR_M_AT, MYF(0)); goto err; } if ((ret=table->field[EVEX_FIELD_DEFINER]->store(et->definer.str, et->definer.length, system_charset_info))) { my_error(ER_EVENT_STORE_FAILED, MYF(0), et->name.str, ret); goto err; } ((Field_timestamp *)table->field[EVEX_FIELD_CREATED])->set_time(); // evex_fill_row() calls my_error() in case of error so no need to handle it here if ((ret= evex_fill_row(thd, table, et, false))) goto err; if (table->file->ha_write_row(table->record[0])) { my_error(ER_EVENT_STORE_FAILED, MYF(0), et->name.str, ret); goto err; } if (mysql_bin_log.is_open()) { thd->clear_error(); /* Such a statement can always go directly to binlog, no trans cache */ thd->binlog_query(THD::MYSQL_QUERY_TYPE, thd->query, thd->query_length, FALSE, FALSE); } *rows_affected= 1; ok: if (dbchanged) (void) mysql_change_db(thd, olddb, 1); if (table) close_thread_tables(thd); DBUG_RETURN(EVEX_OK); err: if (dbchanged) (void) mysql_change_db(thd, olddb, 1); if (table) close_thread_tables(thd); DBUG_RETURN(EVEX_GENERAL_ERROR); } /* Used to execute ALTER EVENT. Pendant to evex_update_event(). SYNOPSIS db_update_event() thd THD sp_name the name of the event to alter et event's data NOTES sp_name is passed since this is the name of the event to alter in case of RENAME TO. */ static int db_update_event(THD *thd, event_timed *et, sp_name *new_name) { TABLE *table; int ret= EVEX_OPEN_TABLE_FAILED; DBUG_ENTER("db_update_event"); DBUG_PRINT("enter", ("dbname: %.*s", et->dbname.length, et->dbname.str)); DBUG_PRINT("enter", ("name: %.*s", et->name.length, et->name.str)); DBUG_PRINT("enter", ("user: %.*s", et->name.length, et->name.str)); if (new_name) DBUG_PRINT("enter", ("rename to: %.*s", new_name->m_name.length, new_name->m_name.str)); if (evex_open_event_table(thd, TL_WRITE, &table)) { my_error(ER_EVENT_OPEN_TABLE_FAILED, MYF(0)); goto err; } // first look whether we overwrite if (new_name) { if (!sortcmp_lex_string(et->name, new_name->m_name, system_charset_info) && !sortcmp_lex_string(et->dbname, new_name->m_db, system_charset_info)) { my_error(ER_EVENT_SAME_NAME, MYF(0), et->name.str); goto err; } if (!evex_db_find_event_aux(thd, new_name->m_db, new_name->m_name, et->definer, table)) { my_error(ER_EVENT_ALREADY_EXISTS, MYF(0), new_name->m_name.str); goto err; } } /* ...and then whether there is such an event. don't exchange the blocks because you will get error 120 from table handler because new_name will overwrite the key and SE will tell us that it cannot find the already found row (copied into record[1] later */ if (EVEX_KEY_NOT_FOUND == evex_db_find_event_aux(thd, et->dbname, et->name, et->definer, table)) { my_error(ER_EVENT_DOES_NOT_EXIST, MYF(0), et->name.str); goto err; } store_record(table,record[1]); // Don't update create on row update. table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET; // evex_fill_row() calls my_error() in case of error so no need to handle it here if ((ret= evex_fill_row(thd, table, et, true))) goto err; if (new_name) { table->field[EVEX_FIELD_DB]-> store(new_name->m_db.str, new_name->m_db.length, system_charset_info); table->field[EVEX_FIELD_NAME]-> store(new_name->m_name.str, new_name->m_name.length, system_charset_info); } if ((ret= table->file->ha_update_row(table->record[1], table->record[0]))) { my_error(ER_EVENT_STORE_FAILED, MYF(0), et->name.str, ret); goto err; } // close mysql.event or we crash later when loading the event from disk close_thread_tables(thd); DBUG_RETURN(0); err: if (table) close_thread_tables(thd); DBUG_RETURN(EVEX_GENERAL_ERROR); } /* Looks for a named event in mysql.event and in case of success returns an object will data loaded from the table. SYNOPSIS db_find_event() thd THD name the name of the event to find definer who owns the event ett event's data if event is found tbl TABLE object to use when not NULL NOTES 1) Use sp_name for look up, return in **ett if found 2) tbl is not closed at exit */ static int db_find_event(THD *thd, sp_name *name, LEX_STRING definer, event_timed **ett, TABLE *tbl) { TABLE *table; int ret; char *ptr; event_timed *et; DBUG_ENTER("db_find_event"); DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str)); if (tbl) table= tbl; else if (evex_open_event_table(thd, TL_READ, &table)) { my_error(ER_EVENT_OPEN_TABLE_FAILED, MYF(0)); ret= EVEX_GENERAL_ERROR; goto done; } if ((ret= evex_db_find_event_aux(thd, name->m_db, name->m_name, definer, table))) { my_error(ER_EVENT_DOES_NOT_EXIST, MYF(0), name->m_name.str); goto done; } et= new event_timed; /* 1)The table should not be closed beforehand. ::load_from_row() only loads and does not compile 2)::load_from_row() is silent on error therefore we emit error msg here */ if ((ret= et->load_from_row(&evex_mem_root, table))) { my_error(ER_EVENT_CANNOT_LOAD_FROM_TABLE, MYF(0)); goto done; } done: if (ret && et) { delete et; et= 0; } // don't close the table if we haven't opened it ourselves if (!tbl && table) close_thread_tables(thd); *ett= et; DBUG_RETURN(ret); } /* Looks for a named event in mysql.event and then loads it from the table, compiles it and insert it into the cache. SYNOPSIS evex_load_and_compile_event() thd THD spn the name of the event to alter definer who is the owner use_lock whether to obtain a lock on LOCK_event_arrays or not RETURN VALUE 0 - OK < 0 - error (in this case underlying functions call my_error()). */ static int evex_load_and_compile_event(THD * thd, sp_name *spn, LEX_STRING definer, bool use_lock) { int ret= 0; MEM_ROOT *tmp_mem_root; event_timed *ett; Open_tables_state backup; DBUG_ENTER("db_load_and_compile_event"); DBUG_PRINT("enter", ("name: %*s", spn->m_name.length, spn->m_name.str)); tmp_mem_root= thd->mem_root; thd->mem_root= &evex_mem_root; thd->reset_n_backup_open_tables_state(&backup); // no need to use my_error() here because db_find_event() has done it if ((ret= db_find_event(thd, spn, definer, &ett, NULL))) goto done; thd->restore_backup_open_tables_state(&backup); /* allocate on evex_mem_root. if you call without evex_mem_root then sphead will not be cleared! */ if ((ret= ett->compile(thd, &evex_mem_root))) goto done; ett->compute_next_execution_time(); if (use_lock) VOID(pthread_mutex_lock(&LOCK_event_arrays)); evex_queue_insert(&EVEX_EQ_NAME, (EVEX_PTOQEL) ett); /* There is a copy in the array which we don't need. sphead won't be destroyed. */ if (use_lock) VOID(pthread_mutex_unlock(&LOCK_event_arrays)); done: if (thd->mem_root != tmp_mem_root) thd->mem_root= tmp_mem_root; DBUG_RETURN(ret); } /* 0 - OK can drop from outside 1 - Scheduled from dropping, don't drop from outside */ static int evex_remove_from_cache(LEX_STRING *db, LEX_STRING *name, bool use_lock, bool is_drop) { uint i; int ret= 0; DBUG_ENTER("evex_remove_from_cache"); /* It is possible that 2 (or 1) pass(es) won't find the event in memory. The reason is that DISABLED events are not cached. */ if (use_lock) VOID(pthread_mutex_lock(&LOCK_event_arrays)); for (i= 0; i < evex_queue_num_elements(EVEX_EQ_NAME); ++i) { event_timed *et= evex_queue_element(&EVEX_EQ_NAME, i, event_timed*); DBUG_PRINT("info", ("[%s.%s]==[%s.%s]?",db->str,name->str, et->dbname.str, et->name.str)); if (!sortcmp_lex_string(*name, et->name, system_charset_info) && !sortcmp_lex_string(*db, et->dbname, system_charset_info)) { if (!et->is_running()) { DBUG_PRINT("evex_remove_from_cache", ("not running - free and delete")); et->free_sp(); delete et; } else { DBUG_PRINT("evex_remove_from_cache", ("running.defer mem free. is_drop=%d", is_drop)); et->flags|= EVENT_EXEC_NO_MORE; if ((et->dropped= is_drop)) ret= 1; } DBUG_PRINT("evex_remove_from_cache", ("delete from queue")); evex_queue_delete_element(&EVEX_EQ_NAME, i); // ok, we have cleaned goto done; } } done: if (use_lock) VOID(pthread_mutex_unlock(&LOCK_event_arrays)); DBUG_RETURN(ret); } /* The function exported to the world for creating of events. SYNOPSIS evex_create_event() thd THD et event's data create_options Options specified when in the query. We are interested whether there is IF NOT EXISTS rows_affected How many rows were affected NOTES - in case there is an event with the same name (db) and IF NOT EXISTS is specified, an warning is put into the W stack. */ int evex_create_event(THD *thd, event_timed *et, uint create_options, uint *rows_affected) { int ret = 0; DBUG_ENTER("evex_create_event"); DBUG_PRINT("enter", ("name: %*s options:%d", et->name.length, et->name.str, create_options)); if ((ret = db_create_event(thd, et, create_options & HA_LEX_CREATE_IF_NOT_EXISTS, rows_affected))) goto done; VOID(pthread_mutex_lock(&LOCK_evex_running)); if (evex_is_running && et->status == MYSQL_EVENT_ENABLED) { sp_name spn(et->dbname, et->name); ret= evex_load_and_compile_event(thd, &spn, et->definer, true); } VOID(pthread_mutex_unlock(&LOCK_evex_running)); done: // No need to close the table, it will be closed in sql_parse::do_command DBUG_RETURN(ret); } /* The function exported to the world for alteration of events. SYNOPSIS evex_update_event() thd THD et event's data new_name set in case of RENAME TO. NOTES et contains data about dbname and event name. name is the new name of the event, if not null this means that RENAME TO was specified in the query. */ int evex_update_event(THD *thd, event_timed *et, sp_name *new_name, uint *rows_affected) { int ret, i; bool need_second_pass= true; DBUG_ENTER("evex_update_event"); DBUG_PRINT("enter", ("name: %*s", et->name.length, et->name.str)); /* db_update_event() opens & closes the table to prevent crash later in the code when loading and compiling the new definition. Also on error conditions my_error() is called so no need to handle here */ if ((ret= db_update_event(thd, et, new_name))) goto done; VOID(pthread_mutex_lock(&LOCK_evex_running)); if (!evex_is_running) UNLOCK_MUTEX_AND_BAIL_OUT(LOCK_evex_running, done); VOID(pthread_mutex_lock(&LOCK_event_arrays)); evex_remove_from_cache(&et->dbname, &et->name, false, false); if (et->status == MYSQL_EVENT_ENABLED) { if (new_name) ret= evex_load_and_compile_event(thd, new_name, et->definer, false); else { sp_name spn(et->dbname, et->name); ret= evex_load_and_compile_event(thd, &spn, et->definer, false); } if (ret == EVEX_COMPILE_ERROR) my_error(ER_EVENT_COMPILE_ERROR, MYF(0)); } VOID(pthread_mutex_unlock(&LOCK_event_arrays)); VOID(pthread_mutex_unlock(&LOCK_evex_running)); done: DBUG_RETURN(ret); } /* Drops an event SYNOPSIS db_drop_event() thd THD et event's name drop_if_exists if set and the event not existing => warning onto the stack rows_affected affected number of rows is returned heres */ int db_drop_event(THD *thd, event_timed *et, bool drop_if_exists, uint *rows_affected) { TABLE *table; Open_tables_state backup; uint ret; DBUG_ENTER("db_drop_event"); ret= EVEX_OPEN_TABLE_FAILED; thd->reset_n_backup_open_tables_state(&backup); if (evex_open_event_table(thd, TL_WRITE, &table)) { my_error(ER_EVENT_OPEN_TABLE_FAILED, MYF(0)); goto done; } if (!(ret= evex_db_find_event_aux(thd, et->dbname,et->name,et->definer,table))) { if ((ret= table->file->ha_delete_row(table->record[0]))) { my_error(ER_EVENT_CANNOT_DELETE, MYF(0)); goto done; } } else if (ret == EVEX_KEY_NOT_FOUND) { if (drop_if_exists) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_SP_DOES_NOT_EXIST, ER(ER_SP_DOES_NOT_EXIST), "Event", et->name.str); ret= 0; } else my_error(ER_EVENT_DOES_NOT_EXIST, MYF(0), et->name.str); goto done; } done: /* evex_drop_event() is used by event_timed::drop therefore we have to close our thread tables. */ close_thread_tables(thd); thd->restore_backup_open_tables_state(&backup); DBUG_RETURN(ret); } /* Drops an event SYNOPSIS evex_drop_event() thd THD et event's name drop_if_exists if set and the event not existing => warning onto the stack rows_affected affected number of rows is returned heres */ int evex_drop_event(THD *thd, event_timed *et, bool drop_if_exists, uint *rows_affected) { TABLE *table; int ret= 0; DBUG_ENTER("evex_drop_event"); VOID(pthread_mutex_lock(&LOCK_evex_running)); if (evex_is_running) ret= evex_remove_from_cache(&et->dbname, &et->name, true, true); VOID(pthread_mutex_unlock(&LOCK_evex_running)); if (ret == 1) ret= 0; else if (ret == 0) ret= db_drop_event(thd, et, drop_if_exists, rows_affected); else my_error(ER_UNKNOWN_ERROR, MYF(0)); DBUG_RETURN(ret); }