1 files changed, 19 insertions, 0 deletions
diff --git a/sql/item_row.cc b/sql/item_row.cc
index 70a9fe50c16..0b55ae5d022 100644
--- a/sql/item_row.cc
+++ b/sql/item_row.cc
@@ -87,6 +87,25 @@ Item_row::eval_not_null_tables(void *opt_arg)
 }
 
 
+bool
+Item_row::find_not_null_fields(table_map allowed)
+{
+  if (~allowed & used_tables())
+    return false;
+
+  Item **arg,**arg_end;
+  if (arg_count)
+  {
+    for (arg= args, arg_end= args + arg_count; arg != arg_end ; arg++)
+    {
+      if (!(*arg)->find_not_null_fields(allowed))
+        continue;
+    }
+  }
+  return false;
+}
+
+
 void Item_row::cleanup()
 {
   DBUG_ENTER("Item_row::cleanup");