gitlab-org--gitlab-foss/db/post_migrate/20170526185858_create_index...

class CreateIndexInPipelineStages < ActiveRecord::Migration[4.2]
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    add_concurrent_index(:ci_stages, [:pipeline_id, :name])
  end

  def down
    remove_concurrent_index(:ci_stages, [:pipeline_id, :name])
  end
end
Add version 4.2 to all existing migrations DB schema generated by a migration may look different in rails 4 and 5 (because rails 5 may use different default values). For this reason it's important to explicitly set for which rails version a migration was written for. See https://stackoverflow.com/questions/35929869/activerecordmigration-deprecation-warning-asks-for-rails-version-but-im-no/35930912#35930912 2018-11-13 07:27:31 +00:00			`class CreateIndexInPipelineStages < ActiveRecord::Migration[4.2]`
Use a separate migration to create pipeline stages index 2017-05-26 18:50:43 +00:00			`include Gitlab::Database::MigrationHelpers`

			`DOWNTIME = false`

			`disable_ddl_transaction!`

			`def up`
			`add_concurrent_index(:ci_stages, [:pipeline_id, :name])`
			`end`

			`def down`
Remove stage index concurrently on migration rollback 2017-06-05 12:54:39 +00:00			`remove_concurrent_index(:ci_stages, [:pipeline_id, :name])`
Use a separate migration to create pipeline stages index 2017-05-26 18:50:43 +00:00			`end`
			`end`