27 lines
1.0 KiB
Ruby
27 lines
1.0 KiB
Ruby
#
|
|
# Copyright (C) 2018 - 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 AddSubmissionDateIndex < ActiveRecord::Migration[5.1]
|
|
tag :predeploy
|
|
disable_ddl_transaction!
|
|
|
|
def change
|
|
return if index_name_exists?(:submissions, 'index_submissions_on_user_and_greatest_dates')
|
|
add_index :submissions, "user_id, GREATEST(submitted_at, created_at)", name: "index_submissions_on_user_and_greatest_dates", algorithm: :concurrently
|
|
end
|
|
end
|