1 files changed, 7 insertions, 0 deletions
diff --git a/sql/item.h b/sql/item.h
index 883cc791f38..d61667f3f2f 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -1208,6 +1208,13 @@ public:
   }
   virtual String *val_nodeset(String*) { return 0; }
 
+  bool eval_const_cond()
+  {
+    DBUG_ASSERT(const_item());
+    DBUG_ASSERT(!is_expensive());
+    return val_bool();
+  }
+
   /*
     save_val() is method of val_* family which stores value in the given
     field.