Merge gleb.loc:/home/uchum/5.0-opt

into  gleb.loc:/home/uchum/5.1-opt


sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/sp_rcontext.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
mysql-test/r/subselect.result:
  Merge with 5.0-opt.
mysql-test/t/subselect.test:
  Merge with 5.0-opt.

1 files changed, 12 insertions, 1 deletions

diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index 843c6ced263..e8e64faf865 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -1760,7 +1760,7 @@ void subselect_engine::set_row(List<Item> &item_list, Item_cache **row)
     item->decimals= sel_item->decimals;
     item->unsigned_flag= sel_item->unsigned_flag;
     maybe_null= sel_item->maybe_null;
-    if (!(row[i]= Item_cache::get_cache(res_type)))
+    if (!(row[i]= Item_cache::get_cache(sel_item)))
       return;
     row[i]->setup(sel_item);
   }
@@ -2222,6 +2222,7 @@ int subselect_indexsubquery_engine::exec()
   ((Item_in_subselect *) item)->value= 0;
   empty_result_set= TRUE;
   null_keypart= 0;
+  table->status= 0;
 
   if (check_null)
   {
@@ -2234,6 +2235,16 @@ int subselect_indexsubquery_engine::exec()
   if (copy_ref_key())
     DBUG_RETURN(1);
 
+  if (table->status)
+  {
+    /* 
+      We know that there will be no rows even if we scan. 
+      Can be set in copy_ref_key.
+    */
+    ((Item_in_subselect *) item)->value= 0;
+    DBUG_RETURN(0);
+  }
+
   if (null_keypart)
     DBUG_RETURN(scan_table());