#
# Copyright (C) 2017 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.

class AddActiveSubmissionsIndex < ActiveRecord::Migration[5.0]
  tag :postdeploy
  disable_ddl_transaction!

  def change
    add_index :submissions, [:assignment_id, :grading_period_id],
              algorithm: :concurrently,
              name: 'index_active_submissions',
              where: "workflow_state <> 'deleted'"
  end
end