1 /* Copyright (C) 2006 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
15
16 /* Read through all rows sequntially */
17
18 #include "maria_def.h"
19
maria_scan_init(register MARIA_HA * info)20 int maria_scan_init(register MARIA_HA *info)
21 {
22 DBUG_ENTER("maria_scan_init");
23
24 info->cur_row.nextpos= info->s->pack.header_length; /* Read first record */
25 info->lastinx= -1; /* Can't forward or backward */
26 if (info->opt_flag & WRITE_CACHE_USED && flush_io_cache(&info->rec_cache))
27 DBUG_RETURN(my_errno);
28
29 if ((*info->s->scan_init)(info))
30 DBUG_RETURN(my_errno);
31 DBUG_RETURN(0);
32 }
33
34 /*
35 Read a row based on position.
36
37 SYNOPSIS
38 maria_scan()
39 info Maria handler
40 record Read data here
41
42 RETURN
43 0 ok
44 HA_ERR_END_OF_FILE End of file
45 HA_ERR_RECORD_DELETED Record was deleted (can only happen for static rec)
46 # Error code
47 */
48
maria_scan(MARIA_HA * info,uchar * record)49 int maria_scan(MARIA_HA *info, uchar *record)
50 {
51 DBUG_ENTER("maria_scan");
52 /* Init all but update-flag */
53 info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
54 DBUG_RETURN((*info->s->scan)(info, record, info->cur_row.nextpos, 1));
55 }
56
57
maria_scan_end(MARIA_HA * info)58 void maria_scan_end(MARIA_HA *info)
59 {
60 (*info->s->scan_end)(info);
61 }
62
63
_ma_def_scan_remember_pos(MARIA_HA * info,MARIA_RECORD_POS * lastpos)64 int _ma_def_scan_remember_pos(MARIA_HA *info, MARIA_RECORD_POS *lastpos)
65 {
66 *lastpos= info->cur_row.lastpos;
67 return 0;
68 }
69
70
_ma_def_scan_restore_pos(MARIA_HA * info,MARIA_RECORD_POS lastpos)71 int _ma_def_scan_restore_pos(MARIA_HA *info, MARIA_RECORD_POS lastpos)
72 {
73 info->cur_row.nextpos= lastpos;
74 return 0;
75 }
76