1/* Copyright (c) 2000, 2001, 2003, 2005-2007 MySQL AB
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 Street, Fifth Floor, Boston, MA 02110-1301, USA */
16
17#include "myrg_def.h"
18
19 /* Read first row according to specific key */
20
21int myrg_rfirst(MYRG_INFO *info, uchar *buf, int inx)
22{
23 MYRG_TABLE *table;
24 MI_INFO *mi;
25 int err;
26
27 if (_myrg_init_queue(info,inx,HA_READ_KEY_OR_NEXT))
28 return my_errno;
29
30 for (table=info->open_tables ; table != info->end_table ; table++)
31 {
32 if ((err=mi_rfirst(table->table,NULL,inx)))
33 {
34 if (err == HA_ERR_END_OF_FILE)
35 continue;
36 return err;
37 }
38 /* adding to queue */
39 queue_insert(&(info->by_key),(uchar *)table);
40 }
41 /* We have done a read in all tables */
42 info->last_used_table=table;
43
44 if (!info->by_key.elements)
45 return HA_ERR_END_OF_FILE;
46
47 mi=(info->current_table=(MYRG_TABLE *)queue_top(&(info->by_key)))->table;
48 return _myrg_mi_read_record(mi,buf);
49}
50