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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 */
/* Read record based on a key */
#include "myrg_def.h"
static int queue_key_cmp(void *keyseg, byte *a, byte *b)
{
MI_INFO *aa=((MYRG_TABLE *)a)->table;
MI_INFO *bb=((MYRG_TABLE *)b)->table;
uint not_used;
int ret= _mi_key_cmp((MI_KEYSEG *)keyseg, aa->lastkey, bb->lastkey,
USE_WHOLE_KEY, SEARCH_FIND, ¬_used);
return ret < 0 ? -1 : ret > 0 ? 1 : 0;
} /* queue_key_cmp */
int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag)
{
int error=0;
QUEUE *q= &(info->by_key);
if (inx < (int) info->keys)
{
if (!is_queue_inited(q))
{
if (init_queue(q,info->tables, 0,
(myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
queue_key_cmp,
info->open_tables->table->s->keyinfo[inx].seg))
error=my_errno;
}
else
{
if (reinit_queue(q,info->tables, 0,
(myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
queue_key_cmp,
info->open_tables->table->s->keyinfo[inx].seg))
error=my_errno;
}
}
return error;
}
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