1 files changed, 7 insertions, 0 deletions
diff --git a/sql/field.h b/sql/field.h
index ae088ab5e31..08905f2c9e9 100644
--- a/sql/field.h
+++ b/sql/field.h
@@ -600,6 +600,13 @@ public:
   {
     in_partitioning_expr= TRUE;
   }
+  bool is_equal(Virtual_column_info* vcol)
+  {
+    return field_type == vcol->get_real_type()
+        && stored_in_db == vcol->is_stored()
+        && expr_str.length == vcol->expr_str.length
+        && memcmp(expr_str.str, vcol->expr_str.str, expr_str.length) == 0;
+  }
 };
 
 class Field: public Value_source