Fix of UNION code

Added heap_delete_table
Added HA_EXTRA_PREPARE_FOR_DELETE
Added and use my_dup() for faster open of tables.
Removed not working no-mix-table-type

1 files changed, 27 insertions, 11 deletions

diff --git a/heap/hp_create.c b/heap/hp_create.c
index 01c5f43adfd..da91e412180 100644
--- a/heap/hp_create.c
+++ b/heap/hp_create.c
@@ -21,33 +21,49 @@
 
 #include "heapdef.h"
 
+
 int heap_create(const char *name)
 {
+  reg1 HP_SHARE *share;
   DBUG_ENTER("heap_create");
-  (void) heap_delete_all(name);
+  pthread_mutex_lock(&THR_LOCK_heap);
+  if ((share=_hp_find_named_heap(name)))
+  {
+    if (share->open_count == 0)
+      _hp_free(share);
+  }
+  else
+  {
+    my_errno=ENOENT;
+  }
+  pthread_mutex_unlock(&THR_LOCK_heap);
   DBUG_RETURN(0);
 }
 
-int heap_delete_all(const char *name)
+int heap_delete_table(const char *name)
 {
-  reg1 HP_SHARE *info;
-  int found;
-  DBUG_ENTER("heap_delete_all");
+  int result;
+  reg1 HP_SHARE *share;
+  DBUG_ENTER("heap_delete_table");
+
   pthread_mutex_lock(&THR_LOCK_heap);
-  if ((info=_hp_find_named_heap(name)))
+  if ((share=_hp_find_named_heap(name)))
   {
-    if (info->open_count == 0)
-      _hp_free(info);
-    found=0;
+    if (share->open_count == 0)
+      _hp_free(share);
+    else
+     share->delete_on_close=1;
+    result=0;
   }
   else
   {
-    found=my_errno=ENOENT;
+    result=my_errno=ENOENT;
   }
   pthread_mutex_unlock(&THR_LOCK_heap);
-  DBUG_RETURN(found);
+  DBUG_RETURN(result);
 }
 
+
 void _hp_free(HP_SHARE *share)
 {
   heap_share_list=list_delete(heap_share_list,&share->open_list);