keep old engine & JOIN if we changed subquery Item (Bug #3646)

1 files changed, 4 insertions, 0 deletions

diff --git a/sql/item_subselect.h b/sql/item_subselect.h
index 6d8f5353695..364781de362 100644
--- a/sql/item_subselect.h
+++ b/sql/item_subselect.h
@@ -290,6 +290,7 @@ public:
   virtual table_map upper_select_const_tables()= 0;
   static table_map calc_const_tables(TABLE_LIST *);
   virtual void print(String *str)= 0;
+  virtual int change_item(Item_subselect *si, select_subselect *result)= 0;
 };
 
 
@@ -313,6 +314,7 @@ public:
   void exclude();
   table_map upper_select_const_tables();
   void print (String *str);
+  int change_item(Item_subselect *si, select_subselect *result);
 };
 
 
@@ -332,6 +334,7 @@ public:
   void exclude();
   table_map upper_select_const_tables();
   void print (String *str);
+  int change_item(Item_subselect *si, select_subselect *result);
 };
 
 
@@ -360,6 +363,7 @@ public:
   void exclude();
   table_map upper_select_const_tables() { return 0; }
   void print (String *str);
+  int change_item(Item_subselect *si, select_subselect *result);
 };