/* Copyright (C) 2000 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; 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 */ /* Delete of records and truncate of tables. Multi-table deletes were introduced by Monty and Sinisa */ #include "mysql_priv.h" #include "sql_select.h" #include "sp_head.h" #include "sql_trigger.h" bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, SQL_LIST *order, ha_rows limit, ulonglong options, bool reset_auto_increment) { bool will_batch; int error, loc_error; TABLE *table; SQL_SELECT *select=0; READ_RECORD info; bool using_limit=limit != HA_POS_ERROR; bool transactional_table, safe_update, const_cond; ha_rows deleted= 0; uint usable_index= MAX_KEY; SELECT_LEX *select_lex= &thd->lex->select_lex; DBUG_ENTER("mysql_delete"); if (open_and_lock_tables(thd, table_list)) DBUG_RETURN(TRUE); if (!(table= table_list->table)) { my_error(ER_VIEW_DELETE_MERGE_VIEW, MYF(0), table_list->view_db.str, table_list->view_name.str); DBUG_RETURN(TRUE); } thd->proc_info="init"; table->map=1; if (mysql_prepare_delete(thd, table_list, &conds)) DBUG_RETURN(TRUE); /* check ORDER BY even if it can be ignored */ if (order && order->elements) { TABLE_LIST tables; List fields; List all_fields; bzero((char*) &tables,sizeof(tables)); tables.table = table; tables.alias = table_list->alias; if (select_lex->setup_ref_array(thd, order->elements) || setup_order(thd, select_lex->ref_pointer_array, &tables, fields, all_fields, (ORDER*) order->first)) { delete select; free_underlaid_joins(thd, &thd->lex->select_lex); DBUG_RETURN(TRUE); } } const_cond= (!conds || conds->const_item()); safe_update=test(thd->options & OPTION_SAFE_UPDATES); if (safe_update && const_cond) { my_message(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE, ER(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE), MYF(0)); DBUG_RETURN(TRUE); } select_lex->no_error= thd->lex->ignore; /* Test if the user wants to delete all rows and deletion doesn't have any side-effects (because of triggers), so we can use optimized handler::delete_all_rows() method. We implement fast TRUNCATE for InnoDB even if triggers are present. TRUNCATE ignores triggers. */ if (!using_limit && const_cond && (!conds || conds->val_int()) && !(specialflag & (SPECIAL_NO_NEW_FUNC | SPECIAL_SAFE_MODE)) && (thd->lex->sql_command == SQLCOM_TRUNCATE || !(table->triggers && table->triggers->has_delete_triggers())) && !thd->current_stmt_binlog_row_based) { /* Update the table->file->stats.records number */ table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK); ha_rows const maybe_deleted= table->file->stats.records; DBUG_PRINT("debug", ("Trying to use delete_all_rows()")); if (!(error=table->file->delete_all_rows())) { error= -1; // ok deleted= maybe_deleted; goto cleanup; } if (error != HA_ERR_WRONG_COMMAND) { table->file->print_error(error,MYF(0)); error=0; goto cleanup; } /* Handler didn't support fast delete; Delete rows one by one */ } if (conds) { Item::cond_result result; conds= remove_eq_conds(thd, conds, &result); if (result == Item::COND_FALSE) // Impossible where limit= 0; } #ifdef WITH_PARTITION_STORAGE_ENGINE if (prune_partitions(thd, table, conds)) { free_underlaid_joins(thd, select_lex); thd->row_count_func= 0; send_ok(thd); // No matching records DBUG_RETURN(0); } #endif /* Update the table->file->stats.records number */ table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK); table->covering_keys.clear_all(); table->quick_keys.clear_all(); // Can't use 'only index' select=make_select(table, 0, 0, conds, 0, &error); if (error) DBUG_RETURN(TRUE); if ((select && select->check_quick(thd, safe_update, limit)) || !limit) { delete select; free_underlaid_joins(thd, select_lex); thd->row_count_func= 0; send_ok(thd,0L); /* We don't need to call reset_auto_increment in this case, because mysql_truncate always gives a NULL conds argument, hence we never get here. */ DBUG_RETURN(0); // Nothing to delete } /* If running in safe sql mode, don't allow updates without keys */ if (table->quick_keys.is_clear_all()) { thd->server_status|=SERVER_QUERY_NO_INDEX_USED; if (safe_update && !using_limit) { delete select; free_underlaid_joins(thd, select_lex); my_message(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE, ER(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE), MYF(0)); DBUG_RETURN(TRUE); } } if (options & OPTION_QUICK) (void) table->file->extra(HA_EXTRA_QUICK); if (order && order->elements) { uint length= 0; SORT_FIELD *sortorder; ha_rows examined_rows; if ((!select || table->quick_keys.is_clear_all()) && limit != HA_POS_ERROR) usable_index= get_index_for_order(table, (ORDER*)(order->first), limit); if (usable_index == MAX_KEY) { table->sort.io_cache= (IO_CACHE *) my_malloc(sizeof(IO_CACHE), MYF(MY_FAE | MY_ZEROFILL)); if (!(sortorder= make_unireg_sortorder((ORDER*) order->first, &length, NULL)) || (table->sort.found_records = filesort(thd, table, sortorder, length, select, HA_POS_ERROR, 1, &examined_rows)) == HA_POS_ERROR) { delete select; free_underlaid_joins(thd, &thd->lex->select_lex); DBUG_RETURN(TRUE); } /* Filesort has already found and selected the rows we want to delete, so we don't need the where clause */ delete select; free_underlaid_joins(thd, select_lex); select= 0; } } /* If quick select is used, initialize it before retrieving rows. */ if (select && select->quick && select->quick->reset()) { delete select; free_underlaid_joins(thd, select_lex); DBUG_RETURN(TRUE); } if (usable_index==MAX_KEY) init_read_record(&info,thd,table,select,1,1); else init_read_record_idx(&info, thd, table, 1, usable_index); init_ftfuncs(thd, select_lex, 1); thd->proc_info="updating"; if (table->triggers && table->triggers->has_triggers(TRG_EVENT_DELETE, TRG_ACTION_AFTER)) { /* The table has AFTER DELETE triggers that might access to subject table and therefore might need delete to be done immediately. So we turn-off the batching. */ (void) table->file->extra(HA_EXTRA_DELETE_CANNOT_BATCH); will_batch= FALSE; } else will_batch= !table->file->start_bulk_delete(); table->mark_columns_needed_for_delete(); while (!(error=info.read_record(&info)) && !thd->killed && !thd->net.report_error) { // thd->net.report_error is tested to disallow delete row on error if (!(select && select->skip_record())&& !thd->net.report_error ) { if (table->triggers && table->triggers->process_triggers(thd, TRG_EVENT_DELETE, TRG_ACTION_BEFORE, FALSE)) { error= 1; break; } if (!(error= table->file->ha_delete_row(table->record[0]))) { deleted++; if (table->triggers && table->triggers->process_triggers(thd, TRG_EVENT_DELETE, TRG_ACTION_AFTER, FALSE)) { error= 1; break; } if (!--limit && using_limit) { error= -1; break; } } else { table->file->print_error(error,MYF(0)); /* In < 4.0.14 we set the error number to 0 here, but that was not sensible, because then MySQL would not roll back the failed DELETE, and also wrote it to the binlog. For MyISAM tables a DELETE probably never should fail (?), but for InnoDB it can fail in a FOREIGN KEY error or an out-of-tablespace error. */ error= 1; break; } } else table->file->unlock_row(); // Row failed selection, release lock on it } if (thd->killed && !error) error= 1; // Aborted if (will_batch && (loc_error= table->file->end_bulk_delete())) { if (error != 1) table->file->print_error(loc_error,MYF(0)); error=1; } thd->proc_info= "end"; end_read_record(&info); if (options & OPTION_QUICK) (void) table->file->extra(HA_EXTRA_NORMAL); if (reset_auto_increment && (error < 0)) { /* We're really doing a truncate and need to reset the table's auto-increment counter. */ int error2= table->file->reset_auto_increment(0); if (error2 && (error2 != HA_ERR_WRONG_COMMAND)) { table->file->print_error(error2, MYF(0)); error= 1; } } cleanup: /* Invalidate the table in the query cache if something changed. This must be before binlog writing and ha_autocommit_... */ if (deleted) { query_cache_invalidate3(thd, table_list, 1); } delete select; transactional_table= table->file->has_transactions(); /* See similar binlogging code in sql_update.cc, for comments */ if ((error < 0) || (deleted && !transactional_table)) { if (mysql_bin_log.is_open()) { if (error < 0) thd->clear_error(); /* [binlog]: If 'handler::delete_all_rows()' was called and the storage engine does not inject the rows itself, we replicate statement-based; otherwise, 'ha_delete_row()' was used to delete specific rows which we might log row-based. */ int log_result= thd->binlog_query(THD::ROW_QUERY_TYPE, thd->query, thd->query_length, transactional_table, FALSE); if (log_result && transactional_table) { error=1; } } if (!transactional_table) thd->no_trans_update.all= TRUE; } free_underlaid_joins(thd, select_lex); if (transactional_table) { if (ha_autocommit_or_rollback(thd,error >= 0)) error=1; } if (thd->lock) { mysql_unlock_tables(thd, thd->lock); thd->lock=0; } if (error < 0 || (thd->lex->ignore && !thd->is_fatal_error)) { thd->row_count_func= deleted; send_ok(thd,deleted); DBUG_PRINT("info",("%ld records deleted",(long) deleted)); } DBUG_RETURN(error >= 0 || thd->net.report_error); } /* Prepare items in DELETE statement SYNOPSIS mysql_prepare_delete() thd - thread handler table_list - global/local table list conds - conditions RETURN VALUE FALSE OK TRUE error */ bool mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds) { Item *fake_conds= 0; SELECT_LEX *select_lex= &thd->lex->select_lex; DBUG_ENTER("mysql_prepare_delete"); List all_fields; thd->lex->allow_sum_func= 0; if (setup_tables_and_check_access(thd, &thd->lex->select_lex.context, &thd->lex->select_lex.top_join_list, table_list, &select_lex->leaf_tables, FALSE, DELETE_ACL, SELECT_ACL) || setup_conds(thd, table_list, select_lex->leaf_tables, conds) || setup_ftfuncs(select_lex)) DBUG_RETURN(TRUE); if (!table_list->updatable || check_key_in_view(thd, table_list)) { my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE"); DBUG_RETURN(TRUE); } { TABLE_LIST *duplicate; if ((duplicate= unique_table(thd, table_list, table_list->next_global, 0))) { update_non_unique_table_error(table_list, "DELETE", duplicate); DBUG_RETURN(TRUE); } } if (select_lex->inner_refs_list.elements && fix_inner_refs(thd, all_fields, select_lex, select_lex->ref_pointer_array)) DBUG_RETURN(-1); select_lex->fix_prepare_information(thd, conds, &fake_conds); DBUG_RETURN(FALSE); } /*************************************************************************** Delete multiple tables from join ***************************************************************************/ #define MEM_STRIP_BUF_SIZE current_thd->variables.sortbuff_size extern "C" int refpos_order_cmp(void* arg, const void *a,const void *b) { handler *file= (handler*)arg; return file->cmp_ref((const uchar*)a, (const uchar*)b); } /* make delete specific preparation and checks after opening tables SYNOPSIS mysql_multi_delete_prepare() thd thread handler RETURN FALSE OK TRUE Error */ bool mysql_multi_delete_prepare(THD *thd) { LEX *lex= thd->lex; TABLE_LIST *aux_tables= (TABLE_LIST *)lex->auxiliary_table_list.first; TABLE_LIST *target_tbl; DBUG_ENTER("mysql_multi_delete_prepare"); /* setup_tables() need for VIEWs. JOIN::prepare() will not do it second time. lex->query_tables also point on local list of DELETE SELECT_LEX */ if (setup_tables_and_check_access(thd, &thd->lex->select_lex.context, &thd->lex->select_lex.top_join_list, lex->query_tables, &lex->select_lex.leaf_tables, FALSE, DELETE_ACL, SELECT_ACL)) DBUG_RETURN(TRUE); /* Multi-delete can't be constructed over-union => we always have single SELECT on top and have to check underlying SELECTs of it */ lex->select_lex.exclude_from_table_unique_test= TRUE; /* Fix tables-to-be-deleted-from list to point at opened tables */ for (target_tbl= (TABLE_LIST*) aux_tables; target_tbl; target_tbl= target_tbl->next_local) { if (!(target_tbl->table= target_tbl->correspondent_table->table)) { DBUG_ASSERT(target_tbl->correspondent_table->view && target_tbl->correspondent_table->merge_underlying_list && target_tbl->correspondent_table->merge_underlying_list-> next_local); my_error(ER_VIEW_DELETE_MERGE_VIEW, MYF(0), target_tbl->correspondent_table->view_db.str, target_tbl->correspondent_table->view_name.str); DBUG_RETURN(TRUE); } if (!target_tbl->correspondent_table->updatable || check_key_in_view(thd, target_tbl->correspondent_table)) { my_error(ER_NON_UPDATABLE_TABLE, MYF(0), target_tbl->table_name, "DELETE"); DBUG_RETURN(TRUE); } /* Check that table from which we delete is not used somewhere inside subqueries/view. */ { TABLE_LIST *duplicate; if ((duplicate= unique_table(thd, target_tbl->correspondent_table, lex->query_tables, 0))) { update_non_unique_table_error(target_tbl->correspondent_table, "DELETE", duplicate); DBUG_RETURN(TRUE); } } } DBUG_RETURN(FALSE); } multi_delete::multi_delete(TABLE_LIST *dt, uint num_of_tables_arg) : delete_tables(dt), deleted(0), found(0), num_of_tables(num_of_tables_arg), error(0), do_delete(0), transactional_tables(0), normal_tables(0) { tempfiles= (Unique **) sql_calloc(sizeof(Unique *) * num_of_tables); } int multi_delete::prepare(List &values, SELECT_LEX_UNIT *u) { DBUG_ENTER("multi_delete::prepare"); unit= u; do_delete= 1; thd->proc_info="deleting from main table"; DBUG_RETURN(0); } bool multi_delete::initialize_tables(JOIN *join) { TABLE_LIST *walk; Unique **tempfiles_ptr; DBUG_ENTER("initialize_tables"); if ((thd->options & OPTION_SAFE_UPDATES) && error_if_full_join(join)) DBUG_RETURN(1); table_map tables_to_delete_from=0; for (walk= delete_tables; walk; walk= walk->next_local) tables_to_delete_from|= walk->table->map; walk= delete_tables; delete_while_scanning= 1; for (JOIN_TAB *tab=join->join_tab, *end=join->join_tab+join->tables; tab < end; tab++) { if (tab->table->map & tables_to_delete_from) { /* We are going to delete from this table */ TABLE *tbl=walk->table=tab->table; walk= walk->next_local; /* Don't use KEYREAD optimization on this table */ tbl->no_keyread=1; /* Don't use record cache */ tbl->no_cache= 1; tbl->covering_keys.clear_all(); if (tbl->file->has_transactions()) transactional_tables= 1; else normal_tables= 1; if (tbl->triggers && tbl->triggers->has_triggers(TRG_EVENT_DELETE, TRG_ACTION_AFTER)) { /* The table has AFTER DELETE triggers that might access to subject table and therefore might need delete to be done immediately. So we turn-off the batching. */ (void) tbl->file->extra(HA_EXTRA_DELETE_CANNOT_BATCH); } tbl->prepare_for_position(); tbl->mark_columns_needed_for_delete(); } else if ((tab->type != JT_SYSTEM && tab->type != JT_CONST) && walk == delete_tables) { /* We are not deleting from the table we are scanning. In this case send_data() shouldn't delete any rows a we may touch the rows in the deleted table many times */ delete_while_scanning= 0; } } walk= delete_tables; tempfiles_ptr= tempfiles; if (delete_while_scanning) { table_being_deleted= delete_tables; walk= walk->next_local; } for (;walk ;walk= walk->next_local) { TABLE *table=walk->table; *tempfiles_ptr++= new Unique (refpos_order_cmp, (void *) table->file, table->file->ref_length, MEM_STRIP_BUF_SIZE); } init_ftfuncs(thd, thd->lex->current_select, 1); DBUG_RETURN(thd->is_fatal_error != 0); } multi_delete::~multi_delete() { for (table_being_deleted= delete_tables; table_being_deleted; table_being_deleted= table_being_deleted->next_local) { TABLE *table= table_being_deleted->table; table->no_keyread=0; } for (uint counter= 0; counter < num_of_tables; counter++) { if (tempfiles[counter]) delete tempfiles[counter]; } } bool multi_delete::send_data(List &values) { int secure_counter= delete_while_scanning ? -1 : 0; TABLE_LIST *del_table; DBUG_ENTER("multi_delete::send_data"); for (del_table= delete_tables; del_table; del_table= del_table->next_local, secure_counter++) { TABLE *table= del_table->table; /* Check if we are using outer join and we didn't find the row */ if (table->status & (STATUS_NULL_ROW | STATUS_DELETED)) continue; table->file->position(table->record[0]); found++; if (secure_counter < 0) { /* We are scanning the current table */ DBUG_ASSERT(del_table == table_being_deleted); if (table->triggers && table->triggers->process_triggers(thd, TRG_EVENT_DELETE, TRG_ACTION_BEFORE, FALSE)) DBUG_RETURN(1); table->status|= STATUS_DELETED; if (!(error=table->file->ha_delete_row(table->record[0]))) { deleted++; if (table->triggers && table->triggers->process_triggers(thd, TRG_EVENT_DELETE, TRG_ACTION_AFTER, FALSE)) DBUG_RETURN(1); } else { table->file->print_error(error,MYF(0)); DBUG_RETURN(1); } } else { error=tempfiles[secure_counter]->unique_add((char*) table->file->ref); if (error) { error= 1; // Fatal error DBUG_RETURN(1); } } } DBUG_RETURN(0); } void multi_delete::send_error(uint errcode,const char *err) { DBUG_ENTER("multi_delete::send_error"); /* First send error what ever it is ... */ my_message(errcode, err, MYF(0)); /* If nothing deleted return */ if (!deleted) DBUG_VOID_RETURN; /* Something already deleted so we have to invalidate cache */ query_cache_invalidate3(thd, delete_tables, 1); /* If rows from the first table only has been deleted and it is transactional, just do rollback. The same if all tables are transactional, regardless of where we are. In all other cases do attempt deletes ... */ if ((table_being_deleted == delete_tables && table_being_deleted->table->file->has_transactions()) || !normal_tables) ha_rollback_stmt(thd); else if (do_delete) { /* We have to execute the recorded do_deletes() and write info into the error log */ error= 1; send_eof(); } DBUG_VOID_RETURN; } /* Do delete from other tables. Returns values: 0 ok 1 error */ int multi_delete::do_deletes() { int local_error= 0, counter= 0, error; bool will_batch; DBUG_ENTER("do_deletes"); DBUG_ASSERT(do_delete); do_delete= 0; // Mark called if (!found) DBUG_RETURN(0); table_being_deleted= (delete_while_scanning ? delete_tables->next_local : delete_tables); for (; table_being_deleted; table_being_deleted= table_being_deleted->next_local, counter++) { TABLE *table = table_being_deleted->table; if (tempfiles[counter]->get(table)) { local_error=1; break; } READ_RECORD info; init_read_record(&info,thd,table,NULL,0,1); /* Ignore any rows not found in reference tables as they may already have been deleted by foreign key handling */ info.ignore_not_found_rows= 1; will_batch= !table->file->start_bulk_delete(); while (!(local_error=info.read_record(&info)) && !thd->killed) { if (table->triggers && table->triggers->process_triggers(thd, TRG_EVENT_DELETE, TRG_ACTION_BEFORE, FALSE)) { local_error= 1; break; } if ((local_error=table->file->ha_delete_row(table->record[0]))) { table->file->print_error(local_error,MYF(0)); break; } deleted++; if (table->triggers && table->triggers->process_triggers(thd, TRG_EVENT_DELETE, TRG_ACTION_AFTER, FALSE)) { local_error= 1; break; } } if (will_batch && (error= table->file->end_bulk_delete())) { if (!local_error) { local_error= error; table->file->print_error(local_error,MYF(0)); } } end_read_record(&info); if (thd->killed && !local_error) local_error= 1; if (local_error == -1) // End of file local_error = 0; } DBUG_RETURN(local_error); } /* Send ok to the client return: 0 sucess 1 error */ bool multi_delete::send_eof() { thd->proc_info="deleting from reference tables"; /* Does deletes for the last n - 1 tables, returns 0 if ok */ int local_error= do_deletes(); // returns 0 if success /* compute a total error to know if something failed */ local_error= local_error || error; /* reset used flags */ thd->proc_info="end"; /* We must invalidate the query cache before binlog writing and ha_autocommit_... */ if (deleted) { query_cache_invalidate3(thd, delete_tables, 1); } if ((local_error == 0) || (deleted && normal_tables)) { if (mysql_bin_log.is_open()) { if (local_error == 0) thd->clear_error(); if (thd->binlog_query(THD::ROW_QUERY_TYPE, thd->query, thd->query_length, transactional_tables, FALSE) && !normal_tables) { local_error=1; // Log write failed: roll back the SQL statement } } if (!transactional_tables) thd->no_trans_update.all= TRUE; } /* Commit or rollback the current SQL statement */ if (transactional_tables) if (ha_autocommit_or_rollback(thd,local_error > 0)) local_error=1; if (!local_error) { thd->row_count_func= deleted; ::send_ok(thd, deleted); } return 0; } /*************************************************************************** TRUNCATE TABLE ****************************************************************************/ /* Optimize delete of all rows by doing a full generate of the table This will work even if the .ISM and .ISD tables are destroyed dont_send_ok should be set if: - We should always wants to generate the table (even if the table type normally can't safely do this. - We don't want an ok to be sent to the end user. - We don't want to log the truncate command - If we want to have a name lock on the table on exit without errors. */ bool mysql_truncate(THD *thd, TABLE_LIST *table_list, bool dont_send_ok) { HA_CREATE_INFO create_info; char path[FN_REFLEN]; TABLE *table; bool error; uint closed_log_tables= 0, lock_logger= 0; uint path_length; uint log_type; DBUG_ENTER("mysql_truncate"); bzero((char*) &create_info,sizeof(create_info)); /* If it is a temporary table, close and regenerate it */ if (!dont_send_ok && (table= find_temporary_table(thd, table_list))) { handlerton *table_type= table->s->db_type; TABLE_SHARE *share= table->s; if (!ha_check_storage_engine_flag(table_type, HTON_CAN_RECREATE)) goto trunc_by_del; table->file->info(HA_STATUS_AUTO | HA_STATUS_NO_LOCK); close_temporary_table(thd, table, 0, 0); // Don't free share ha_create_table(thd, share->normalized_path.str, share->db.str, share->table_name.str, &create_info, 1); // We don't need to call invalidate() because this table is not in cache if ((error= (int) !(open_temporary_table(thd, share->path.str, share->db.str, share->table_name.str, 1)))) (void) rm_temporary_table(table_type, path); free_table_share(share); my_free((char*) table,MYF(0)); /* If we return here we will not have logged the truncation to the bin log and we will not send_ok() to the client. */ goto end; } path_length= build_table_filename(path, sizeof(path), table_list->db, table_list->table_name, reg_ext, 0); if (!dont_send_ok) { enum legacy_db_type table_type; mysql_frm_type(thd, path, &table_type); if (table_type == DB_TYPE_UNKNOWN) { my_error(ER_NO_SUCH_TABLE, MYF(0), table_list->db, table_list->table_name); DBUG_RETURN(TRUE); } if (!ha_check_storage_engine_flag(ha_resolve_by_legacy_type(thd, table_type), HTON_CAN_RECREATE)) goto trunc_by_del; if (lock_and_wait_for_table_name(thd, table_list)) DBUG_RETURN(TRUE); } log_type= check_if_log_table(table_list->db_length, table_list->db, table_list->table_name_length, table_list->table_name, 1); /* close log tables in use */ if (log_type) { lock_logger= 1; logger.lock(); logger.close_log_table(log_type, FALSE); closed_log_tables= closed_log_tables | log_type; } // Remove the .frm extension AIX 5.2 64-bit compiler bug (BUG#16155): this // crashes, replacement works. *(path + path_length - reg_ext_length)= // '\0'; path[path_length - reg_ext_length] = 0; VOID(pthread_mutex_lock(&LOCK_open)); error= ha_create_table(thd, path, table_list->db, table_list->table_name, &create_info, 1); VOID(pthread_mutex_unlock(&LOCK_open)); query_cache_invalidate3(thd, table_list, 0); end: if (!dont_send_ok) { if (!error) { if (mysql_bin_log.is_open()) { /* TRUNCATE must always be statement-based binlogged (not row-based) so we don't test current_stmt_binlog_row_based. */ thd->clear_error(); thd->binlog_query(THD::STMT_QUERY_TYPE, thd->query, thd->query_length, FALSE, FALSE); } send_ok(thd); // This should return record count } VOID(pthread_mutex_lock(&LOCK_open)); unlock_table_name(thd, table_list); VOID(pthread_mutex_unlock(&LOCK_open)); if (opt_slow_log && (closed_log_tables & QUERY_LOG_SLOW)) logger.reopen_log_table(QUERY_LOG_SLOW); if (opt_log && (closed_log_tables & QUERY_LOG_GENERAL)) logger.reopen_log_table(QUERY_LOG_GENERAL); if (lock_logger) logger.unlock(); } else if (error) { VOID(pthread_mutex_lock(&LOCK_open)); unlock_table_name(thd, table_list); VOID(pthread_mutex_unlock(&LOCK_open)); } DBUG_RETURN(error); trunc_by_del: /* Probably InnoDB table */ ulonglong save_options= thd->options; table_list->lock_type= TL_WRITE; thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_NOT_AUTOCOMMIT); ha_enable_transaction(thd, FALSE); mysql_init_select(thd->lex); bool save_binlog_row_based= thd->current_stmt_binlog_row_based; thd->clear_current_stmt_binlog_row_based(); error= mysql_delete(thd, table_list, (COND*) 0, (SQL_LIST*) 0, HA_POS_ERROR, LL(0), TRUE); ha_enable_transaction(thd, TRUE); thd->options= save_options; thd->current_stmt_binlog_row_based= save_binlog_row_based; DBUG_RETURN(error); }