-class AddStartFinishTimeToTasksAndPipelines < ActiveRecord::Migration
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+class AddStartFinishTimeToTasksAndPipelines < ActiveRecord::Migration[4.2]
def up
add_column :job_tasks, :started_at, :datetime
add_column :job_tasks, :finished_at, :datetime