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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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "myisamdef.h"
/*
** Find current row with read on position or read on key
** If inx >= 0 find record using key
** Return values:
** 0 = Ok.
** HA_ERR_KEY_NOT_FOUND = Row is deleted
** HA_ERR_END_OF_FILE = End of file
*/
int mi_rsame(MI_INFO *info, byte *record, int inx)
{
DBUG_ENTER("mi_rsame");
if (inx != -1 && ! mi_is_key_active(info->s->state.key_map, inx))
{
DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
}
if (info->lastpos == HA_OFFSET_ERROR || info->update & HA_STATE_DELETED)
{
DBUG_RETURN(my_errno=HA_ERR_KEY_NOT_FOUND); /* No current record */
}
info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
/* Read row from data file */
if (fast_mi_readinfo(info))
DBUG_RETURN(my_errno);
if (inx >= 0)
{
info->lastinx=inx;
info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
info->lastpos);
if (info->s->concurrent_insert)
rw_rdlock(&info->s->key_root_lock[inx]);
VOID(_mi_search(info,info->s->keyinfo+inx,info->lastkey, USE_WHOLE_KEY,
SEARCH_SAME,
info->s->state.key_root[inx]));
if (info->s->concurrent_insert)
rw_unlock(&info->s->key_root_lock[inx]);
}
if (!(*info->read_record)(info,info->lastpos,record))
DBUG_RETURN(0);
if (my_errno == HA_ERR_RECORD_DELETED)
my_errno=HA_ERR_KEY_NOT_FOUND;
DBUG_RETURN(my_errno);
} /* mi_rsame */
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