1/* Copyright (c) 2002, 2004-2007 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
20int myrg_rnext_same(MYRG_INFO *info, uchar *buf)
21{
22 int err;
23 MI_INFO *mi;
24
25 if (!info->current_table)
26 return (HA_ERR_KEY_NOT_FOUND);
27
28 /* at first, do rnext for the table found before */
29 if ((err=mi_rnext_same(info->current_table->table,NULL)))
30 {
31 if (err == HA_ERR_END_OF_FILE)
32 {
33 queue_remove_top(&(info->by_key));
34 if (!info->by_key.elements)
35 return HA_ERR_END_OF_FILE;
36 }
37 else
38 return err;
39 }
40 else
41 {
42 /* Found here, adding to queue */
43 queue_top(&(info->by_key))=(uchar *)(info->current_table);
44 queue_replace_top(&(info->by_key));
45 }
46
47 /* now, mymerge's read_next is as simple as one queue_top */
48 mi=(info->current_table=(MYRG_TABLE *)queue_top(&(info->by_key)))->table;
49 return _myrg_mi_read_record(mi,buf);
50}
51
52