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90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* Update current record in heap-database */
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#include "heapdef.h"
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int heap_update(HP_INFO *info, const byte *old, const byte *heap_new)
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{
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HP_KEYDEF *keydef, *end, *p_lastinx;
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byte *pos;
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bool auto_key_changed= 0;
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HP_SHARE *share= info->s;
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DBUG_ENTER("heap_update");
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test_active(info);
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pos=info->current_ptr;
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if (info->opt_flag & READ_CHECK_USED && hp_rectest(info,old))
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DBUG_RETURN(my_errno); /* Record changed */
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if (--(share->records) < share->blength >> 1) share->blength>>= 1;
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share->changed=1;
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p_lastinx= share->keydef + info->lastinx;
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for (keydef= share->keydef, end= keydef + share->keys; keydef < end; keydef++)
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{
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if (hp_rec_key_cmp(keydef, old, heap_new))
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{
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if ((*keydef->delete_key)(info, keydef, old, pos, keydef == p_lastinx) ||
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(*keydef->write_key)(info, keydef, heap_new, pos))
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goto err;
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if (share->auto_key == (uint) (keydef - share->keydef + 1))
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auto_key_changed= 1;
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}
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}
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memcpy(pos,heap_new,(size_t) share->reclength);
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if (++(share->records) == share->blength) share->blength+= share->blength;
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#if !defined(DBUG_OFF) && defined(EXTRA_HEAP_DEBUG)
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DBUG_EXECUTE("check_heap",heap_check_heap(info, 0););
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#endif
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if (auto_key_changed)
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heap_update_auto_increment(info, heap_new);
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DBUG_RETURN(0);
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err:
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if (my_errno == HA_ERR_FOUND_DUPP_KEY)
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{
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info->errkey = keydef - share->keydef;
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if (keydef->algorithm == HA_KEY_ALG_BTREE)
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{
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/* we don't need to delete non-inserted key from rb-tree */
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if ((*keydef->write_key)(info, keydef, old, pos))
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{
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if (++(share->records) == share->blength)
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share->blength+= share->blength;
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DBUG_RETURN(my_errno);
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}
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keydef--;
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}
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while (keydef >= share->keydef)
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{
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if (hp_rec_key_cmp(keydef, old, heap_new))
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{
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if ((*keydef->delete_key)(info, keydef, heap_new, pos, 0) ||
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(*keydef->write_key)(info, keydef, old, pos))
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break;
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}
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keydef--;
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}
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}
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if (++(share->records) == share->blength)
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share->blength+= share->blength;
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DBUG_RETURN(my_errno);
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} /* heap_update */
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