db/migrate/20170204181513_add_index_to_labels_for_type_and_project.rb


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

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    add_concurrent_index :labels, [:type, :project_id]
  end

  def down
    remove_index :labels, [:type, :project_id] if index_exists? :labels, [:type, :project_id]
  end
end