1 files changed, 4 insertions, 0 deletions
diff --git a/sql/item_subselect.h b/sql/item_subselect.h
index b5823dfb194..7e504d09565 100644
--- a/sql/item_subselect.h
+++ b/sql/item_subselect.h
@@ -149,6 +149,10 @@ public:
   Item_subselect(THD *thd);
 
   virtual subs_type substype() { return UNKNOWN_SUBS; }
+  bool is_exists_predicate()
+  {
+    return substype() == Item_subselect::EXISTS_SUBS;
+  }
   bool is_in_predicate()
   {
     return get_IN_subquery() != NULL;