db/migrate/20180530135500_add_index_to_stages_position.rb


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

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    add_concurrent_index :ci_stages, [:pipeline_id, :position]
  end

  def down
    remove_concurrent_index :ci_stages, [:pipeline_id, :position]
  end
end