2 files changed, 10 insertions, 0 deletions
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index 013304d9df5..fbc1ad97e76 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -654,6 +654,15 @@ Item_func_nullif::val_str(String *str)
   return res;
 }
 
+
+bool
+Item_func_nullif::is_null()
+{
+  if (!(this->*cmp_func)())
+    return null_value=1;
+  return 0;
+}
+
 /*
   CASE expression 
   Return the matching ITEM or NULL if all compares (including else) failed
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 236ebb8d28b..8f1aa525190 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -240,6 +240,7 @@ public:
   void fix_length_and_dec();
   const char *func_name() const { return "nullif"; }
   table_map not_null_tables() const { return 0; }
+  bool is_null();
 };