-class AddMd5IndexToContainers < ActiveRecord::Migration
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+class AddMd5IndexToContainers < ActiveRecord::Migration[4.2]
def up
ActiveRecord::Base.connection.execute 'CREATE INDEX index_containers_on_reuse_columns on containers (md5(command), cwd, md5(environment), output_path, container_image, md5(mounts), secret_mounts_md5, md5(runtime_constraints))'
end