1 /* Copyright (c) 2000-2002, 2004-2008 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 02110-1335 USA */
16
17 /* Update current record in heap-database */
18
19 #include "heapdef.h"
20
heap_update(HP_INFO * info,const uchar * old,const uchar * heap_new)21 int heap_update(HP_INFO *info, const uchar *old, const uchar *heap_new)
22 {
23 HP_KEYDEF *keydef, *end, *p_lastinx;
24 uchar *pos;
25 my_bool auto_key_changed= 0, key_changed= 0;
26 HP_SHARE *share= info->s;
27 DBUG_ENTER("heap_update");
28
29 test_active(info);
30 pos=info->current_ptr;
31
32 if (info->opt_flag & READ_CHECK_USED && hp_rectest(info,old))
33 DBUG_RETURN(my_errno); /* Record changed */
34 if (--(share->records) < share->blength >> 1) share->blength>>= 1;
35 share->changed=1;
36
37 p_lastinx= share->keydef + info->lastinx;
38 for (keydef= share->keydef, end= keydef + share->keys; keydef < end; keydef++)
39 {
40 if (hp_rec_key_cmp(keydef, old, heap_new))
41 {
42 if ((*keydef->delete_key)(info, keydef, old, pos, keydef == p_lastinx) ||
43 (*keydef->write_key)(info, keydef, heap_new, pos))
44 goto err;
45 if (share->auto_key == (uint) (keydef - share->keydef + 1))
46 auto_key_changed= 1;
47 }
48 }
49
50 memcpy(pos,heap_new,(size_t) share->reclength);
51 if (++(share->records) == share->blength) share->blength+= share->blength;
52
53 #if !defined(DBUG_OFF) && defined(EXTRA_HEAP_DEBUG)
54 DBUG_EXECUTE("check_heap",heap_check_heap(info, 0););
55 #endif
56 if (auto_key_changed)
57 heap_update_auto_increment(info, heap_new);
58 if (key_changed)
59 share->key_version++;
60 DBUG_RETURN(0);
61
62 err:
63 if (my_errno == HA_ERR_FOUND_DUPP_KEY)
64 {
65 info->errkey = (int) (keydef - share->keydef);
66 if (keydef->algorithm == HA_KEY_ALG_BTREE)
67 {
68 /* we don't need to delete non-inserted key from rb-tree */
69 if ((*keydef->write_key)(info, keydef, old, pos))
70 {
71 if (++(share->records) == share->blength)
72 share->blength+= share->blength;
73 DBUG_RETURN(my_errno);
74 }
75 keydef--;
76 }
77 while (keydef >= share->keydef)
78 {
79 if (hp_rec_key_cmp(keydef, old, heap_new))
80 {
81 if ((*keydef->delete_key)(info, keydef, heap_new, pos, 0) ||
82 (*keydef->write_key)(info, keydef, old, pos))
83 break;
84 }
85 keydef--;
86 }
87 }
88 if (++(share->records) == share->blength)
89 share->blength+= share->blength;
90 DBUG_RETURN(my_errno);
91 } /* heap_update */
92