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bk@work.mysql.com
2000-07-31 21:29:14 +02:00
parent 7eec25e393
commit f4c589ff6c
2375 changed files with 454571 additions and 0 deletions
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heap/hp_update.c Normal file
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/* 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 */