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53 lines
1.7 KiB
C
53 lines
1.7 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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/* Read record based on a key */
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#include "mymrgdef.h"
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static int queue_key_cmp(void *keyseg, byte *a, byte *b)
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{
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MI_INFO *aa=((MYRG_TABLE *)a)->table;
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MI_INFO *bb=((MYRG_TABLE *)b)->table;
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uint not_used;
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return (_mi_key_cmp((MI_KEYSEG *)keyseg, aa->lastkey, bb->lastkey,
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USE_WHOLE_KEY, SEARCH_FIND, ¬_used));
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} /* queue_key_cmp */
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int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag)
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{
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QUEUE *q=&(info->by_key);
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if (!q->root)
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{
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if (init_queue(q,info->tables, 0,
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(myisam_read_vec[search_flag]==SEARCH_SMALLER),
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queue_key_cmp,
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info->open_tables->table->s->keyinfo[inx].seg))
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return my_errno;
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}
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else
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{
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if (reinit_queue(q,info->tables, 0,
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(myisam_read_vec[search_flag]==SEARCH_SMALLER),
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queue_key_cmp,
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info->open_tables->table->s->keyinfo[inx].seg))
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return my_errno;
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}
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return 0;
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}
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