-class AddIndexOnTimestamps < ActiveRecord::Migration
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+class AddIndexOnTimestamps < ActiveRecord::Migration[4.2]
def tables
%w{api_clients collections jobs job_steps links logs nodes pipeline_invocations pipelines projects specimens users}
end