1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* Copyright (c) 2000, 2001, 2005-2007 MySQL AB
Use is subject to license terms
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
/* read record through position and fix key-position */
/* As mi_rsame but supply a position */
#include "myisamdef.h"
/*
** If inx >= 0 update index pointer
** Returns one of the following values:
** 0 = Ok.
** HA_ERR_KEY_NOT_FOUND = Row is deleted
** HA_ERR_END_OF_FILE = End of file
*/
int mi_rsame_with_pos(MI_INFO *info, uchar *record, int inx, my_off_t filepos)
{
DBUG_ENTER("mi_rsame_with_pos");
DBUG_PRINT("enter",("index: %d filepos: %ld", inx, (long) filepos));
if (inx < -1 ||
(inx >= 0 && ! mi_is_key_active(info->s->state.key_map, inx)))
{
DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
}
info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
if ((*info->s->read_rnd)(info,record,filepos,0))
{
if (my_errno == HA_ERR_RECORD_DELETED)
my_errno=HA_ERR_KEY_NOT_FOUND;
DBUG_RETURN(my_errno);
}
info->lastpos=filepos;
info->lastinx=inx;
if (inx >= 0)
{
info->lastkey_length=_mi_make_key(info,(uint) inx,info->lastkey,record,
info->lastpos);
info->update|=HA_STATE_KEY_CHANGED; /* Don't use indexposition */
}
DBUG_RETURN(0);
} /* mi_rsame_pos */
|
