1/* Copyright (c) 2000, 2001, 2005-2007 MySQL AB, 2009 Sun Microsystems, Inc.
2 Use is subject to license terms.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; version 2 of the License.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
16
17#include "myisamdef.h"
18
19 /*
20 ** Find current row with read on position or read on key
21 ** If inx >= 0 find record using key
22 ** Return values:
23 ** 0 = Ok.
24 ** HA_ERR_KEY_NOT_FOUND = Row is deleted
25 ** HA_ERR_END_OF_FILE = End of file
26 */
27
28
29int mi_rsame(MI_INFO *info, uchar *record, int inx)
30{
31 DBUG_ENTER("mi_rsame");
32
33 if (inx != -1 && ! mi_is_key_active(info->s->state.key_map, inx))
34 {
35 DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
36 }
37 if (info->lastpos == HA_OFFSET_ERROR || info->update & HA_STATE_DELETED)
38 {
39 DBUG_RETURN(my_errno=HA_ERR_KEY_NOT_FOUND); /* No current record */
40 }
41 info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
42
43 /* Read row from data file */
44 if (fast_mi_readinfo(info))
45 DBUG_RETURN(my_errno);
46
47 if (inx >= 0)
48 {
49 info->lastinx=inx;
50 info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
51 info->lastpos);
52 if (info->s->concurrent_insert)
53 mysql_rwlock_rdlock(&info->s->key_root_lock[inx]);
54 (void) _mi_search(info,info->s->keyinfo+inx,info->lastkey, USE_WHOLE_KEY,
55 SEARCH_SAME,
56 info->s->state.key_root[inx]);
57 if (info->s->concurrent_insert)
58 mysql_rwlock_unlock(&info->s->key_root_lock[inx]);
59 }
60
61 if (!(*info->read_record)(info,info->lastpos,record))
62 DBUG_RETURN(0);
63 if (my_errno == HA_ERR_RECORD_DELETED)
64 my_errno=HA_ERR_KEY_NOT_FOUND;
65 DBUG_RETURN(my_errno);
66} /* mi_rsame */
67