release/src/router/mysql/storage/myisammrg/myrg_extra.c

   1 /* Copyright (c) 2000-2003, 2005-2007 MySQL AB
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 of the License.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11
  12    You should have received a copy of the GNU General Public License
  13    along with this program; if not, write to the Free Software
  14    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */
  15
  16 /*
  17   Extra functions we want to do with a database
  18   - All flags, exept record-cache-flags, are set in all used databases
  19     record-cache-flags are set in myrg_rrnd when we are changing database.
  20 */
  21
  22 #include "myrg_def.h"
  23
  24 int myrg_extra(MYRG_INFO *info,enum ha_extra_function function,
  25                void *extra_arg)
  26 {
  27   int error,save_error=0;
  28   MYRG_TABLE *file;
  29   DBUG_ENTER("myrg_extra");
  30   DBUG_PRINT("info",("function: %lu", (ulong) function));
  31
  32   if (!info->children_attached)
  33     DBUG_RETURN(1);
  34   if (function == HA_EXTRA_CACHE)
  35   {
  36     info->cache_in_use=1;
  37     info->cache_size= (extra_arg ? *(ulong*) extra_arg :
  38                        my_default_record_cache_size);
  39   }
  40   else
  41   {
  42     if (function == HA_EXTRA_NO_CACHE ||
  43         function == HA_EXTRA_PREPARE_FOR_UPDATE)
  44       info->cache_in_use=0;
  45     if (function == HA_EXTRA_RESET_STATE)
  46     {
  47       info->current_table=0;
  48       info->last_used_table=info->open_tables;
  49     }
  50     for (file=info->open_tables ; file != info->end_table ; file++)
  51     {
  52       if ((error=mi_extra(file->table, function, extra_arg)))
  53         save_error=error;
  54     }
  55   }
  56   DBUG_RETURN(save_error);
  57 }
  58
  59
  60 void myrg_extrafunc(MYRG_INFO *info, invalidator_by_filename inv)
  61 {
  62   MYRG_TABLE *file;
  63   DBUG_ENTER("myrg_extrafunc");
  64
  65   for (file=info->open_tables ; file != info->end_table ; file++)
  66     file->table->s->invalidator = inv;
  67
  68   DBUG_VOID_RETURN;
  69 }
  70
  71
  72 int myrg_reset(MYRG_INFO *info)
  73 {
  74   int save_error= 0;
  75   MYRG_TABLE *file;
  76   DBUG_ENTER("myrg_reset");
  77
  78   if (!info->children_attached)
  79     DBUG_RETURN(1);
  80   info->cache_in_use=0;
  81   info->current_table=0;
  82   info->last_used_table= info->open_tables;
  83
  84   for (file=info->open_tables ; file != info->end_table ; file++)
  85   {
  86     int error;
  87     if ((error= mi_reset(file->table)))
  88       save_error=error;
  89   }
  90   DBUG_RETURN(save_error);
  91 }