db/post_migrate/20170621102400_add_stage_id_index_to_builds.rb


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

class AddStageIdIndexToBuilds < ActiveRecord::Migration
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    unless index_exists?(:ci_builds, :stage_id)
      add_concurrent_foreign_key(:ci_builds, :ci_stages, column: :stage_id, on_delete: :cascade)
      add_concurrent_index(:ci_builds, :stage_id)
    end
  end

  def down
    if index_exists?(:ci_builds, :stage_id)
      remove_foreign_key(:ci_builds, column: :stage_id)
      remove_concurrent_index(:ci_builds, :stage_id)
    end
  end
end