mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 11:01:52 +01:00
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/* 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 */
|
|||
|
|||
/* Update current record in heap-database */
|
|||
|
|||
#include "heapdef.h"
|
|||
|
|||
int heap_update(HP_INFO *info, const byte *old, const byte *new)
|
|||
{
|
|||
uint key;
|
|||
byte *pos;
|
|||
HP_SHARE *share=info->s;
|
|||
DBUG_ENTER("heap_update");
|
|||
|
|||
test_active(info);
|
|||
pos=info->current_ptr;
|
|||
|
|||
if (info->opt_flag & READ_CHECK_USED && _hp_rectest(info,old))
|
|||
DBUG_RETURN(my_errno); /* Record changed */
|
|||
if (--(share->records) < share->blength >> 1) share->blength>>= 1;
|
|||
share->changed=1;
|
|||
|
|||
for (key=0 ; key < share->keys ; key++)
|
|||
{
|
|||
if (_hp_rec_key_cmp(share->keydef+key,old,new))
|
|||
{
|
|||
if (_hp_delete_key(info,share->keydef+key,old,pos,key ==
|
|||
(uint) info->lastinx) ||
|
|||
_hp_write_key(share,share->keydef+key,new,pos))
|
|||
goto err;
|
|||
}
|
|||
}
|
|||
|
|||
memcpy(pos,new,(size_t) share->reclength);
|
|||
if (++(share->records) == share->blength) share->blength+= share->blength;
|
|||
DBUG_RETURN(0);
|
|||
|
|||
err:
|
|||
if (my_errno == HA_ERR_FOUND_DUPP_KEY)
|
|||
{
|
|||
info->errkey=key;
|
|||
do
|
|||
{
|
|||
if (_hp_rec_key_cmp(share->keydef+key,old,new))
|
|||
{
|
|||
if (_hp_delete_key(info,share->keydef+key,new,pos,0) ||
|
|||
_hp_write_key(share,share->keydef+key,old,pos))
|
|||
break;
|
|||
}
|
|||
} while (key-- > 0);
|
|||
}
|
|||
if (++(share->records) == share->blength) share->blength+= share->blength;
|
|||
DBUG_RETURN(my_errno);
|
|||
} /* heap_update */
|
