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-rw-r--r--storage/heap/hp_update.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/storage/heap/hp_update.c b/storage/heap/hp_update.c
new file mode 100644
index 00000000..da83a9c7
--- /dev/null
+++ b/storage/heap/hp_update.c
@@ -0,0 +1,91 @@
+/* Copyright (c) 2000-2002, 2004-2008 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 02110-1335 USA */
+
+/* Update current record in heap-database */
+
+#include "heapdef.h"
+
+int heap_update(HP_INFO *info, const uchar *old, const uchar *heap_new)
+{
+ HP_KEYDEF *keydef, *end, *p_lastinx;
+ uchar *pos;
+ my_bool auto_key_changed= 0, key_changed= 0;
+ HP_SHARE *share= info->s;
+ DBUG_ENTER("heap_update");
+
+ test_active(info);
+ pos=info->current_ptr;
+
+ if (info->opt_flag & READ_CHECK_USED && hp_rectest(info,old))
+ DBUG_RETURN(my_errno); /* Record changed */
+ if (--(share->records) < share->blength >> 1) share->blength>>= 1;
+ share->changed=1;
+
+ p_lastinx= share->keydef + info->lastinx;
+ for (keydef= share->keydef, end= keydef + share->keys; keydef < end; keydef++)
+ {
+ if (hp_rec_key_cmp(keydef, old, heap_new))
+ {
+ if ((*keydef->delete_key)(info, keydef, old, pos, keydef == p_lastinx) ||
+ (*keydef->write_key)(info, keydef, heap_new, pos))
+ goto err;
+ if (share->auto_key == (uint) (keydef - share->keydef + 1))
+ auto_key_changed= 1;
+ }
+ }
+
+ memcpy(pos,heap_new,(size_t) share->reclength);
+ if (++(share->records) == share->blength) share->blength+= share->blength;
+
+#if !defined(DBUG_OFF) && defined(EXTRA_HEAP_DEBUG)
+ DBUG_EXECUTE("check_heap",heap_check_heap(info, 0););
+#endif
+ if (auto_key_changed)
+ heap_update_auto_increment(info, heap_new);
+ if (key_changed)
+ share->key_version++;
+ DBUG_RETURN(0);
+
+ err:
+ if (my_errno == HA_ERR_FOUND_DUPP_KEY)
+ {
+ info->errkey = (int) (keydef - share->keydef);
+ if (keydef->algorithm == HA_KEY_ALG_BTREE)
+ {
+ /* we don't need to delete non-inserted key from rb-tree */
+ if ((*keydef->write_key)(info, keydef, old, pos))
+ {
+ if (++(share->records) == share->blength)
+ share->blength+= share->blength;
+ DBUG_RETURN(my_errno);
+ }
+ keydef--;
+ }
+ while (keydef >= share->keydef)
+ {
+ if (hp_rec_key_cmp(keydef, old, heap_new))
+ {
+ if ((*keydef->delete_key)(info, keydef, heap_new, pos, 0) ||
+ (*keydef->write_key)(info, keydef, old, pos))
+ break;
+ }
+ keydef--;
+ }
+ }
+ if (++(share->records) == share->blength)
+ share->blength+= share->blength;
+ DBUG_RETURN(my_errno);
+} /* heap_update */