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/* Copyright (C) 2000-2002, 2004-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
/* Update current record in heap-database */
#include "heapdef.h"
int heap_update(HP_INFO *info, const uchar *old, const uchar *heap_new)
{
HP_KEYDEF *keydef, *end, *p_lastinx;
uchar *pos;
my_bool auto_key_changed= 0, key_changed= 0;
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;
p_lastinx= share->keydef + info->lastinx;
for (keydef= share->keydef, end= keydef + share->keys; keydef < end; keydef++)
{
if (hp_rec_key_cmp(keydef, old, heap_new, 0))
{
if ((*keydef->delete_key)(info, keydef, old, pos, keydef == p_lastinx) ||
(*keydef->write_key)(info, keydef, heap_new, pos))
goto err;
if (share->auto_key == (uint) (keydef - share->keydef + 1))
auto_key_changed= 1;
}
}
memcpy(pos,heap_new,(size_t) share->reclength);
if (++(share->records) == share->blength) share->blength+= share->blength;
#if !defined(DBUG_OFF) && defined(EXTRA_HEAP_DEBUG)
DBUG_EXECUTE("check_heap",heap_check_heap(info, 0););
#endif
if (auto_key_changed)
heap_update_auto_increment(info, heap_new);
if (key_changed)
share->key_version++;
DBUG_RETURN(0);
err:
if (my_errno == HA_ERR_FOUND_DUPP_KEY)
{
info->errkey = (int) (keydef - share->keydef);
if (keydef->algorithm == HA_KEY_ALG_BTREE)
{
/* we don't need to delete non-inserted key from rb-tree */
if ((*keydef->write_key)(info, keydef, old, pos))
{
if (++(share->records) == share->blength)
share->blength+= share->blength;
DBUG_RETURN(my_errno);
}
keydef--;
}
while (keydef >= share->keydef)
{
if (hp_rec_key_cmp(keydef, old, heap_new, 0))
{
if ((*keydef->delete_key)(info, keydef, heap_new, pos, 0) ||
(*keydef->write_key)(info, keydef, old, pos))
break;
}
keydef--;
}
}
if (++(share->records) == share->blength)
share->blength+= share->blength;
DBUG_RETURN(my_errno);
} /* heap_update */
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