myrg_extra.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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 */
- /*
- Extra functions we want to do with a database
- - All flags, exept record-cache-flags, are set in all used databases
- record-cache-flags are set in myrg_rrnd when we are changing database.
- */
- #include "myrg_def.h"
- int myrg_extra(MYRG_INFO *info,enum ha_extra_function function,
- void *extra_arg)
- {
- int error,save_error=0;
- MYRG_TABLE *file;
- DBUG_ENTER("myrg_extra");
- DBUG_PRINT("info",("function: %d",(ulong) function));
- if (function == HA_EXTRA_CACHE)
- {
- info->cache_in_use=1;
- info->cache_size= (extra_arg ? *(ulong*) extra_arg :
- my_default_record_cache_size);
- }
- else
- {
- if (function == HA_EXTRA_NO_CACHE || function == HA_EXTRA_RESET ||
- function == HA_EXTRA_PREPARE_FOR_UPDATE)
- info->cache_in_use=0;
- if (function == HA_EXTRA_RESET || function == HA_EXTRA_RESET_STATE)
- {
- info->current_table=0;
- info->last_used_table=info->open_tables;
- }
- for (file=info->open_tables ; file != info->end_table ; file++)
- {
- if ((error=mi_extra(file->table, function, extra_arg)))
- save_error=error;
- }
- }
- DBUG_RETURN(save_error);
- }
- void myrg_extrafunc(MYRG_INFO *info, invalidator_by_filename inv)
- {
- MYRG_TABLE *file;
- DBUG_ENTER("myrg_extrafunc");
- for (file=info->open_tables ; file != info->end_table ; file++)
- file->table->s->invalidator = inv;
- DBUG_VOID_RETURN;
- }