Adding upstream version 1:10.11.6.upstream/1%10.11.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 197 insertions, 0 deletions

diff --git a/storage/heap/hp_clear.c b/storage/heap/hp_clear.c
new file mode 100644
index 00000000..b0b26324
--- /dev/null
+++ b/storage/heap/hp_clear.c
@@ -0,0 +1,197 @@
+/* Copyright (c) 2000-2002, 2004-2007 MySQL AB, 2009 Sun Microsystems, Inc.
+   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 St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+/*
+  remove all records from database
+  Identical as hp_create() and hp_open() but used HP_SHARE* instead of name and
+  database remains open.
+*/
+
+#include "heapdef.h"
+
+void heap_clear(HP_INFO *info)
+{
+  hp_clear(info->s);
+}
+
+void hp_clear(HP_SHARE *info)
+{
+  DBUG_ENTER("hp_clear");
+
+  if (info->block.levels)
+    (void) hp_free_level(&info->block,info->block.levels,info->block.root,
+			(uchar*) 0);
+  info->block.levels=0;
+  hp_clear_keys(info);
+  info->records= info->deleted= 0;
+  info->data_length= 0;
+  info->blength=1;
+  info->changed=0;
+  info->del_link=0;
+  info->key_version++;
+  info->file_version++;
+  DBUG_VOID_RETURN;
+}
+
+
+/*
+  Clear all keys.
+
+  SYNOPSIS
+    heap_clear_keys()
+    info      A pointer to the heap storage engine HP_INFO struct.
+
+  DESCRIPTION
+    Delete all trees of all indexes and leave them empty.
+
+  RETURN
+    void
+*/
+
+void heap_clear_keys(HP_INFO *info)
+{
+  hp_clear(info->s);
+}
+
+
+/*
+  Clear all keys.
+
+  SYNOPSIS
+    hp_clear_keys()
+    info      A pointer to the heap storage engine HP_SHARE struct.
+
+  DESCRIPTION
+    Delete all trees of all indexes and leave them empty.
+
+  RETURN
+    void
+*/
+
+void hp_clear_keys(HP_SHARE *info)
+{
+  uint key;
+  DBUG_ENTER("hp_clear_keys");
+
+  for (key=0 ; key < info->keys ; key++)
+  {
+    HP_KEYDEF *keyinfo = info->keydef + key;
+    if (keyinfo->algorithm == HA_KEY_ALG_BTREE)
+    {
+      delete_tree(&keyinfo->rb_tree, 0);
+    }
+    else
+    {
+      HP_BLOCK *block= &keyinfo->block;
+      if (block->levels)
+        (void) hp_free_level(block,block->levels,block->root,(uchar*) 0);
+      block->levels=0;
+      block->last_allocated=0;
+      keyinfo->hash_buckets= 0;
+    }
+  }
+  info->index_length=0;
+  DBUG_VOID_RETURN;
+}
+
+
+/*
+  Disable all indexes.
+
+  SYNOPSIS
+    heap_disable_indexes()
+    info      A pointer to the heap storage engine HP_INFO struct.
+
+  DESCRIPTION
+    Disable and clear (remove contents of) all indexes.
+
+  RETURN
+    0  ok
+*/
+
+int heap_disable_indexes(HP_INFO *info)
+{
+  HP_SHARE *share= info->s;
+
+  if (share->keys)
+  {
+    hp_clear_keys(share);
+    share->currently_disabled_keys= share->keys;
+    share->keys= 0;
+  }
+  return 0;
+}
+
+
+/*
+  Enable all indexes
+
+  SYNOPSIS
+    heap_enable_indexes()
+    info      A pointer to the heap storage engine HP_INFO struct.
+
+  DESCRIPTION
+    Enable all indexes. The indexes might have been disabled
+    by heap_disable_index() before.
+    The function works only if both data and indexes are empty,
+    since the heap storage engine cannot repair the indexes.
+    To be sure, call handler::delete_all_rows() before.
+
+  RETURN
+    0  ok
+    HA_ERR_CRASHED data or index is non-empty.
+*/
+
+int heap_enable_indexes(HP_INFO *info)
+{
+  int error= 0;
+  HP_SHARE *share= info->s;
+
+  if (share->data_length || share->index_length)
+    error= HA_ERR_CRASHED;
+  else
+    if (share->currently_disabled_keys)
+    {
+      share->keys= share->currently_disabled_keys;
+      share->currently_disabled_keys= 0;
+    }
+  return error;
+}
+
+
+/*
+  Test if indexes are disabled.
+
+  SYNOPSIS
+    heap_indexes_are_disabled()
+    info      A pointer to the heap storage engine HP_INFO struct.
+
+  DESCRIPTION
+    Test if indexes are disabled.
+
+  RETURN
+    0  indexes are not disabled
+    1  all indexes are disabled
+   [2  non-unique indexes are disabled - NOT YET IMPLEMENTED]
+*/
+
+int heap_indexes_are_disabled(HP_INFO *info)
+{
+  HP_SHARE *share= info->s;
+
+  return (! share->keys && share->currently_disabled_keys);
+}
+