|
1.5.3
by Seth Arnold
Import upstream version 5.1.69 |
1 |
/* Copyright (c) 2000-2003, 2005-2007 MySQL AB
|
|
1
by Norbert Tretkowski
Import upstream version 5.1.45 |
2 |
|
3 |
This program is free software; you can redistribute it and/or modify
|
|
4 |
it under the terms of the GNU General Public License as published by
|
|
5 |
the Free Software Foundation; version 2 of the License.
|
|
6 |
||
7 |
This program is distributed in the hope that it will be useful,
|
|
8 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
9 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
10 |
GNU General Public License for more details.
|
|
11 |
||
12 |
You should have received a copy of the GNU General Public License
|
|
13 |
along with this program; if not, write to the Free Software
|
|
14 |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
15 |
||
16 |
#include "myrg_def.h" |
|
17 |
||
18 |
/*
|
|
19 |
Read next row with the same key as previous read
|
|
20 |
*/
|
|
21 |
||
22 |
int myrg_rnext(MYRG_INFO *info, uchar *buf, int inx) |
|
23 |
{
|
|
24 |
int err; |
|
25 |
MI_INFO *mi; |
|
26 |
||
27 |
if (!info->current_table) |
|
28 |
return (HA_ERR_KEY_NOT_FOUND); |
|
29 |
||
30 |
/* at first, do rnext for the table found before */
|
|
31 |
if ((err=mi_rnext(info->current_table->table,NULL,inx))) |
|
32 |
{
|
|
33 |
if (err == HA_ERR_END_OF_FILE) |
|
34 |
{
|
|
35 |
queue_remove(&(info->by_key),0); |
|
36 |
if (!info->by_key.elements) |
|
37 |
return HA_ERR_END_OF_FILE; |
|
38 |
}
|
|
39 |
else
|
|
40 |
return err; |
|
41 |
}
|
|
42 |
else
|
|
43 |
{
|
|
44 |
/* Found here, adding to queue */
|
|
45 |
queue_top(&(info->by_key))=(uchar *)(info->current_table); |
|
46 |
queue_replaced(&(info->by_key)); |
|
47 |
}
|
|
48 |
||
49 |
/* now, mymerge's read_next is as simple as one queue_top */
|
|
50 |
mi=(info->current_table=(MYRG_TABLE *)queue_top(&(info->by_key)))->table; |
|
51 |
return _myrg_mi_read_record(mi,buf); |
|
52 |
}
|