/* Copyright (C) 2004-2006 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 "event_scheduler.h" #include "sp.h" #include "sp_head.h" /* TODO list : - 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. - Add logging to file 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. */ MEM_ROOT evex_mem_root; time_t mysql_event_last_create_time= 0L; const char *event_scheduler_state_names[]= { "OFF", "0", "ON", "1", "SUSPEND", "2", NullS }; TYPELIB Events::opt_typelib= { array_elements(event_scheduler_state_names)-1, "", event_scheduler_state_names, NULL }; ulong Events::opt_event_scheduler= 2; static TABLE_FIELD_W_TYPE event_table_fields[Events::FIELD_COUNT] = { { {(char *) STRING_WITH_LEN("db")}, {(char *) STRING_WITH_LEN("char(64)")}, {(char *) STRING_WITH_LEN("utf8")} }, { {(char *) STRING_WITH_LEN("name")}, {(char *) STRING_WITH_LEN("char(64)")}, {(char *) STRING_WITH_LEN("utf8")} }, { {(char *) STRING_WITH_LEN("body")}, {(char *) STRING_WITH_LEN("longblob")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("definer")}, {(char *) STRING_WITH_LEN("char(77)")}, {(char *) STRING_WITH_LEN("utf8")} }, { {(char *) STRING_WITH_LEN("execute_at")}, {(char *) STRING_WITH_LEN("datetime")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("interval_value")}, {(char *) STRING_WITH_LEN("int(11)")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("interval_field")}, {(char *) STRING_WITH_LEN("enum('YEAR','QUARTER','MONTH','DAY'," "'HOUR','MINUTE','WEEK','SECOND','MICROSECOND','YEAR_MONTH','DAY_HOUR'," "'DAY_MINUTE','DAY_SECOND','HOUR_MINUTE','HOUR_SECOND','MINUTE_SECOND'," "'DAY_MICROSECOND','HOUR_MICROSECOND','MINUTE_MICROSECOND'," "'SECOND_MICROSECOND')")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("created")}, {(char *) STRING_WITH_LEN("timestamp")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("modified")}, {(char *) STRING_WITH_LEN("timestamp")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("last_executed")}, {(char *) STRING_WITH_LEN("datetime")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("starts")}, {(char *) STRING_WITH_LEN("datetime")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("ends")}, {(char *) STRING_WITH_LEN("datetime")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("status")}, {(char *) STRING_WITH_LEN("enum('ENABLED','DISABLED')")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("on_completion")}, {(char *) STRING_WITH_LEN("enum('DROP','PRESERVE')")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("sql_mode")}, {(char *) STRING_WITH_LEN("set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES'," "'IGNORE_SPACE','NOT_USED','ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION'," "'NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB'," "'NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40'," "'ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES'," "'STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES'," "'ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER'," "'HIGH_NOT_PRECEDENCE')")}, {NULL, 0} }, { {(char *) STRING_WITH_LEN("comment")}, {(char *) STRING_WITH_LEN("char(64)")}, {(char *) STRING_WITH_LEN("utf8")} } }; LEX_STRING interval_type_to_name[] = { {(char *) STRING_WITH_LEN("YEAR")}, {(char *) STRING_WITH_LEN("QUARTER")}, {(char *) STRING_WITH_LEN("MONTH")}, {(char *) STRING_WITH_LEN("DAY")}, {(char *) STRING_WITH_LEN("HOUR")}, {(char *) STRING_WITH_LEN("MINUTE")}, {(char *) STRING_WITH_LEN("WEEK")}, {(char *) STRING_WITH_LEN("SECOND")}, {(char *) STRING_WITH_LEN("MICROSECOND")}, {(char *) STRING_WITH_LEN("YEAR_MONTH")}, {(char *) STRING_WITH_LEN("DAY_HOUR")}, {(char *) STRING_WITH_LEN("DAY_MINUTE")}, {(char *) STRING_WITH_LEN("DAY_SECOND")}, {(char *) STRING_WITH_LEN("HOUR_MINUTE")}, {(char *) STRING_WITH_LEN("HOUR_SECOND")}, {(char *) STRING_WITH_LEN("MINUTE_SECOND")}, {(char *) STRING_WITH_LEN("DAY_MICROSECOND")}, {(char *) STRING_WITH_LEN("HOUR_MICROSECOND")}, {(char *) STRING_WITH_LEN("MINUTE_MICROSECOND")}, {(char *) STRING_WITH_LEN("SECOND_MICROSECOND")} }; /* Compares 2 LEX strings regarding case. SYNOPSIS my_time_compare() s - first LEX_STRING t - second LEX_STRING cs - charset RETURN VALUE -1 - s < t 0 - s == t 1 - s > t Notes TIME.second_part is not considered during comparison */ 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); } /* Compares 2 TIME structures SYNOPSIS my_time_compare() a - first TIME b - second time RETURN VALUE -1 - a < b 0 - a == b 1 - a > b NOTES TIME.second_part is not considered during comparison */ int my_time_compare(TIME *a, TIME *b) { my_ulonglong a_t= TIME_to_ulonglong_datetime(a); my_ulonglong b_t= TIME_to_ulonglong_datetime(b); if (a_t > b_t) return 1; else if (a_t < b_t) return -1; return 0; } /* Compares the execute_at members of 2 Event_timed instances. Used as callback for the prioritized queue when shifting elements inside. SYNOPSIS event_timed_compare() vptr - not used (set it to NULL) a - first Event_timed object b - second Event_timed object RETURNS: -1 - a->execute_at < b->execute_at 0 - a->execute_at == b->execute_at 1 - a->execute_at > b->execute_at Notes execute_at.second_part is not considered during comparison */ int event_timed_compare_q(void *vptr, byte* a, byte *b) { return my_time_compare(&((Event_timed *)a)->execute_at, &((Event_timed *)b)->execute_at); } /* Reconstructs interval expression from interval type and expression value that is in form of a value of the smalles entity: For YEAR_MONTH - expression is in months DAY_MINUTE - expression is in minutes SYNOPSIS Events::reconstruct_interval_expression() buf - preallocated String buffer to add the value to interval - the interval type (for instance YEAR_MONTH) expression - the value in the lowest entity RETURNS 0 - OK 1 - Error */ int Events::reconstruct_interval_expression(String *buf, interval_type interval, longlong expression) { ulonglong expr= expression; char tmp_buff[128], *end; bool close_quote= TRUE; int multipl= 0; char separator=':'; switch (interval) { case INTERVAL_YEAR_MONTH: multipl= 12; separator= '-'; goto common_1_lev_code; case INTERVAL_DAY_HOUR: multipl= 24; separator= ' '; goto common_1_lev_code; case INTERVAL_HOUR_MINUTE: case INTERVAL_MINUTE_SECOND: multipl= 60; common_1_lev_code: buf->append('\''); end= longlong10_to_str(expression/multipl, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff)); expr= expr - (expr/multipl)*multipl; break; case INTERVAL_DAY_MINUTE: { ulonglong tmp_expr= expr; tmp_expr/=(24*60); buf->append('\''); end= longlong10_to_str(tmp_expr, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff));// days buf->append(' '); tmp_expr= expr - tmp_expr*(24*60);//minutes left end= longlong10_to_str(tmp_expr/60, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff));// hours expr= tmp_expr - (tmp_expr/60)*60; /* the code after the switch will finish */ } break; case INTERVAL_HOUR_SECOND: { ulonglong tmp_expr= expr; buf->append('\''); end= longlong10_to_str(tmp_expr/3600, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff));// hours buf->append(':'); tmp_expr= tmp_expr - (tmp_expr/3600)*3600; end= longlong10_to_str(tmp_expr/60, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff));// minutes expr= tmp_expr - (tmp_expr/60)*60; /* the code after the switch will finish */ } break; case INTERVAL_DAY_SECOND: { ulonglong tmp_expr= expr; tmp_expr/=(24*3600); buf->append('\''); end= longlong10_to_str(tmp_expr, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff));// days buf->append(' '); tmp_expr= expr - tmp_expr*(24*3600);//seconds left end= longlong10_to_str(tmp_expr/3600, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff));// hours buf->append(':'); tmp_expr= tmp_expr - (tmp_expr/3600)*3600; end= longlong10_to_str(tmp_expr/60, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff));// minutes expr= tmp_expr - (tmp_expr/60)*60; /* the code after the switch will finish */ } break; case INTERVAL_DAY_MICROSECOND: case INTERVAL_HOUR_MICROSECOND: case INTERVAL_MINUTE_MICROSECOND: case INTERVAL_SECOND_MICROSECOND: case INTERVAL_MICROSECOND: my_error(ER_NOT_SUPPORTED_YET, MYF(0), "MICROSECOND"); return 1; break; case INTERVAL_QUARTER: expr/= 3; close_quote= FALSE; break; case INTERVAL_WEEK: expr/= 7; default: close_quote= FALSE; break; } if (close_quote) buf->append(separator); end= longlong10_to_str(expr, tmp_buff, 10); buf->append(tmp_buff, (uint) (end- tmp_buff)); if (close_quote) buf->append('\''); return 0; } /* Open mysql.event table for read SYNOPSIS Events::open_event_table() thd Thread context lock_type How to lock the table table The table pointer RETURN VALUE 1 Cannot lock table 2 The table is corrupted - different number of fields 0 OK */ int Events::open_event_table(THD *thd, enum thr_lock_type lock_type, TABLE **table) { TABLE_LIST tables; 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 (table_check_intact(tables.table, Events::FIELD_COUNT, event_table_fields, &mysql_event_last_create_time, ER_CANNOT_LOAD_FROM_TABLE)) { 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 et event_timed object containing dbname & name table TABLE object for open mysql.event table. RETURN VALUE 0 - Routine found EVEX_KEY_NOT_FOUND - No routine with given name */ inline int evex_db_find_event_aux(THD *thd, Event_timed *et, TABLE *table) { return evex_db_find_event_by_name(thd, et->dbname, et->name, table); } /* Find row in open mysql.event table representing event SYNOPSIS evex_db_find_event_by_name() 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_by_name(THD *thd, const LEX_STRING dbname, const LEX_STRING ev_name, TABLE *table) { byte key[MAX_KEY_LENGTH]; DBUG_ENTER("evex_db_find_event_by_name"); 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[Events::FIELD_DB]->field_length || ev_name.length > table->field[Events::FIELD_NAME]->field_length) DBUG_RETURN(EVEX_KEY_NOT_FOUND); table->field[Events::FIELD_DB]->store(dbname.str, dbname.length, &my_charset_bin); table->field[Events::FIELD_NAME]->store(ev_name.str, ev_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_PRINT("info", ("Row not fonud")); DBUG_RETURN(EVEX_KEY_NOT_FOUND); } DBUG_PRINT("info", ("Row 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 RETURN VALUE 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) { CHARSET_INFO *scs= system_charset_info; enum Events::enum_table_field field_num; DBUG_ENTER("evex_fill_row"); DBUG_PRINT("info", ("dbname=[%s]", et->dbname.str)); DBUG_PRINT("info", ("name =[%s]", et->name.str)); DBUG_PRINT("info", ("body =[%s]", et->body.str)); if (table->field[field_num= Events::FIELD_DEFINER]-> store(et->definer.str, et->definer.length, scs)) goto err_truncate; if (table->field[field_num= Events::FIELD_DB]-> store(et->dbname.str, et->dbname.length, scs)) goto err_truncate; if (table->field[field_num= Events::FIELD_NAME]-> store(et->name.str, et->name.length, scs)) goto err_truncate; /* both ON_COMPLETION and STATUS are NOT NULL thus not calling set_notnull()*/ table->field[Events::FIELD_ON_COMPLETION]-> store((longlong)et->on_completion, true); table->field[Events::FIELD_STATUS]->store((longlong)et->status, true); /* Change the SQL_MODE only if body was present in an ALTER EVENT and of course always during CREATE EVENT. */ if (et->body.str) { table->field[Events::FIELD_SQL_MODE]-> store((longlong)thd->variables.sql_mode, true); if (table->field[field_num= Events::FIELD_BODY]-> store(et->body.str, et->body.length, scs)) goto err_truncate; } if (et->expression) { table->field[Events::FIELD_INTERVAL_EXPR]->set_notnull(); table->field[Events::FIELD_INTERVAL_EXPR]-> store((longlong)et->expression, true); table->field[Events::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[Events::FIELD_TRANSIENT_INTERVAL]-> store((longlong)et->interval+1, true); table->field[Events::FIELD_EXECUTE_AT]->set_null(); if (!et->starts_null) { table->field[Events::FIELD_STARTS]->set_notnull(); table->field[Events::FIELD_STARTS]-> store_time(&et->starts, MYSQL_TIMESTAMP_DATETIME); } if (!et->ends_null) { table->field[Events::FIELD_ENDS]->set_notnull(); table->field[Events::FIELD_ENDS]-> store_time(&et->ends, MYSQL_TIMESTAMP_DATETIME); } } else if (et->execute_at.year) { table->field[Events::FIELD_INTERVAL_EXPR]->set_null(); table->field[Events::FIELD_TRANSIENT_INTERVAL]->set_null(); table->field[Events::FIELD_STARTS]->set_null(); table->field[Events::FIELD_ENDS]->set_null(); table->field[Events::FIELD_EXECUTE_AT]->set_notnull(); table->field[Events::FIELD_EXECUTE_AT]-> store_time(&et->execute_at, MYSQL_TIMESTAMP_DATETIME); } 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[Events::FIELD_MODIFIED])->set_time(); if (et->comment.str) { if (table->field[field_num= Events::FIELD_COMMENT]-> store(et->comment.str, et->comment.length, scs)) goto err_truncate; } DBUG_RETURN(0); err_truncate: my_error(ER_EVENT_DATA_TOO_LONG, MYF(0), table->field[field_num]->field_name); 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". */ int db_create_event(THD *thd, Event_timed *et, my_bool create_if_not, uint *rows_affected) { int ret= 0; CHARSET_INFO *scs= system_charset_info; TABLE *table; 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 (Events::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, 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[Events::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; } ((Field_timestamp *)table->field[Events::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; } #ifdef USE_THIS_CODE_AS_TEMPLATE_WHEN_EVENT_REPLICATION_IS_AGREED 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); } #endif *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 Events::update_event(). SYNOPSIS db_update_event() thd THD sp_name the name of the event to alter et event's data RETURN VALUE 0 OK EVEX_GENERAL_ERROR Error occured (my_error() called) 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) { CHARSET_INFO *scs= system_charset_info; 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->definer.length, et->definer.str)); if (new_name) DBUG_PRINT("enter", ("rename to: %.*s", new_name->m_name.length, new_name->m_name.str)); if (Events::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, scs) && !sortcmp_lex_string(et->dbname, new_name->m_db, scs)) { my_error(ER_EVENT_SAME_NAME, MYF(0), et->name.str); goto err; } if (!evex_db_find_event_by_name(thd,new_name->m_db,new_name->m_name,table)) { my_error(ER_EVENT_ALREADY_EXISTS, MYF(0), new_name->m_name.str); goto err; } } /* ...and then if 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, 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[Events::FIELD_DB]-> store(new_name->m_db.str, new_name->m_db.length, scs); table->field[Events::FIELD_NAME]-> store(new_name->m_name.str, new_name->m_name.length, scs); } 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 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 RETURN VALUE 0 ok In this case *ett is set to the event # error *ett == 0 */ int db_find_event(THD *thd, sp_name *name, Event_timed **ett, TABLE *tbl, MEM_ROOT *root) { TABLE *table; int ret; Event_timed *et= NULL; DBUG_ENTER("db_find_event"); DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str)); if (!root) root= &evex_mem_root; if (tbl) table= tbl; else if (Events::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_by_name(thd, name->m_db, name->m_name, 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(root, table))) { my_error(ER_CANNOT_LOAD_FROM_TABLE, MYF(0)); goto done; } done: if (ret) { 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); } /* The function exported to the world for creating of events. SYNOPSIS Events::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 RETURN VALUE 0 OK !0 Error 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 Events::create_event(THD *thd, Event_timed *et, uint create_options, uint *rows_affected) { int ret; DBUG_ENTER("Events::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))) { Event_scheduler *scheduler= Event_scheduler::get_instance(); if (scheduler->initialized() && (ret= scheduler->add_event(thd, et, true))) my_error(ER_EVENT_MODIFY_QUEUE_ERROR, MYF(0), ret); } /* 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 Events::update_event() thd THD et event's data new_name set in case of RENAME TO. RETURN VALUE 0 OK !0 Error NOTES et contains data about dbname and event name. new_name is the new name of the event, if not null (this means that RENAME TO was specified in the query) */ int Events::update_event(THD *thd, Event_timed *et, sp_name *new_name, uint *rows_affected) { int ret; DBUG_ENTER("Events::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))) { Event_scheduler *scheduler= Event_scheduler::get_instance(); if (scheduler->initialized() && (ret= scheduler->replace_event(thd, et, new_name? &new_name->m_db: NULL, new_name? &new_name->m_name: NULL))) my_error(ER_EVENT_MODIFY_QUEUE_ERROR, MYF(0), ret); } 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 RETURN VALUE 0 OK !0 Error (my_error() called) */ int db_drop_event(THD *thd, Event_timed *et, bool drop_if_exists, uint *rows_affected) { TABLE *table; Open_tables_state backup; int ret; DBUG_ENTER("db_drop_event"); ret= EVEX_OPEN_TABLE_FAILED; thd->reset_n_backup_open_tables_state(&backup); if (Events::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, 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 Events::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 RETURN VALUE 0 OK !0 Error (reported) */ int Events::drop_event(THD *thd, Event_timed *et, bool drop_if_exists, uint *rows_affected) { int ret; DBUG_ENTER("Events::drop_event"); if (!(ret= db_drop_event(thd, et, drop_if_exists, rows_affected))) { Event_scheduler *scheduler= Event_scheduler::get_instance(); if (scheduler->initialized() && (ret= scheduler->drop_event(thd, et))) my_error(ER_EVENT_MODIFY_QUEUE_ERROR, MYF(0), ret); } DBUG_RETURN(ret); } /* SHOW CREATE EVENT SYNOPSIS Events::show_create_event() thd THD spn the name of the event (db, name) RETURN VALUE 0 OK 1 Error during writing to the wire */ int Events::show_create_event(THD *thd, sp_name *spn) { int ret; Event_timed *et= NULL; Open_tables_state backup; DBUG_ENTER("evex_update_event"); DBUG_PRINT("enter", ("name: %*s", spn->m_name.length, spn->m_name.str)); thd->reset_n_backup_open_tables_state(&backup); ret= db_find_event(thd, spn, &et, NULL, thd->mem_root); thd->restore_backup_open_tables_state(&backup); if (!ret) { Protocol *protocol= thd->protocol; char show_str_buf[768]; String show_str(show_str_buf, sizeof(show_str_buf), system_charset_info); List field_list; byte *sql_mode_str; ulong sql_mode_len=0; show_str.length(0); show_str.set_charset(system_charset_info); if (et->get_create_event(thd, &show_str)) goto err; field_list.push_back(new Item_empty_string("Event", NAME_LEN)); sql_mode_str= sys_var_thd_sql_mode::symbolic_mode_representation(thd, et->sql_mode, &sql_mode_len); field_list.push_back(new Item_empty_string("sql_mode", sql_mode_len)); field_list.push_back(new Item_empty_string("Create Event", show_str.length())); if (protocol->send_fields(&field_list, Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF)) goto err; protocol->prepare_for_resend(); protocol->store(et->name.str, et->name.length, system_charset_info); protocol->store((char*) sql_mode_str, sql_mode_len, system_charset_info); protocol->store(show_str.c_ptr(), show_str.length(), system_charset_info); ret= protocol->write(); send_eof(thd); } delete et; DBUG_RETURN(ret); err: delete et; DBUG_RETURN(1); } /* Drops all events from a schema SYNOPSIS Events::drop_schema_events() thd Thread db ASCIIZ schema name RETURN VALUE 0 OK !0 Error */ int Events::drop_schema_events(THD *thd, char *db) { int ret= 0; LEX_STRING db_lex= {db, strlen(db)}; DBUG_ENTER("evex_drop_db_events"); DBUG_PRINT("enter", ("dropping events from %s", db)); Event_scheduler *scheduler= Event_scheduler::get_instance(); if (scheduler->initialized()) ret= scheduler->drop_schema_events(thd, &db_lex); else ret= db_drop_events_from_table(thd, &db_lex); DBUG_RETURN(ret); } /* Drops all events in the selected database, from mysql.event. SYNOPSIS evex_drop_db_events_from_table() thd Thread db Schema name RETURN VALUE 0 OK !0 Error from ha_delete_row */ int db_drop_events_from_table(THD *thd, LEX_STRING *db) { int ret; TABLE *table; READ_RECORD read_record_info; DBUG_ENTER("db_drop_events_from_table"); DBUG_PRINT("info", ("dropping events from %s", db->str)); if ((ret= Events::open_event_table(thd, TL_WRITE, &table))) { sql_print_error("Table mysql.event is damaged."); DBUG_RETURN(ret); } /* only enabled events are in memory, so we go now and delete the rest */ init_read_record(&read_record_info, thd, table, NULL, 1, 0); while (!(read_record_info.read_record(&read_record_info)) && !ret) { char *et_db= get_field(thd->mem_root, table->field[Events::FIELD_DB]); LEX_STRING et_db_lex= {et_db, strlen(et_db)}; DBUG_PRINT("info", ("Current event %s.%s", et_db, get_field(thd->mem_root, table->field[Events::FIELD_NAME]))); if (!sortcmp_lex_string(et_db_lex, *db, system_charset_info)) { DBUG_PRINT("info", ("Dropping")); if ((ret= table->file->ha_delete_row(table->record[0]))) my_error(ER_EVENT_DROP_FAILED, MYF(0), get_field(thd->mem_root, table->field[Events::FIELD_NAME])); } } end_read_record(&read_record_info); thd->version--; /* Force close to free memory */ close_thread_tables(thd); DBUG_RETURN(ret); } /* Inits the scheduler's structures. SYNOPSIS Events::init() NOTES This function is not synchronized. RETURN VALUE 0 OK 1 Error */ int Events::init() { int ret= 0; DBUG_ENTER("Events::init"); /* it should be an assignment! */ if (opt_event_scheduler) { Event_scheduler *scheduler= Event_scheduler::get_instance(); DBUG_ASSERT(opt_event_scheduler == 1 || opt_event_scheduler == 2); DBUG_RETURN(scheduler->init() || (opt_event_scheduler == 1? scheduler->start(): scheduler->start_suspended())); } DBUG_RETURN(0); } /* Cleans up scheduler's resources. Called at server shutdown. SYNOPSIS Events::shutdown() NOTES This function is not synchronized. */ void Events::shutdown() { DBUG_ENTER("Events::shutdown"); Event_scheduler *scheduler= Event_scheduler::get_instance(); if (scheduler->initialized()) { scheduler->stop(); scheduler->destroy(); } DBUG_VOID_RETURN; } /* Proxy for Event_scheduler::dump_internal_status SYNOPSIS Events::dump_internal_status() thd Thread RETURN VALUE 0 OK !0 Error */ int Events::dump_internal_status(THD *thd) { return Event_scheduler::dump_internal_status(thd); } /* Inits Events mutexes SYNOPSIS Events::init_mutexes() thd Thread */ void Events::init_mutexes() { Event_scheduler::init_mutexes(); } /* Destroys Events mutexes SYNOPSIS Events::destroy_mutexes() */ void Events::destroy_mutexes() { Event_scheduler::destroy_mutexes(); }