# frozen_string_literal: true class AddIndexesIssuesOnProjectIdAndClosedAt < Gitlab::Database::Migration[2.0] disable_ddl_transaction! OLD_INDEX_NAME = 'index_issues_on_project_id_and_closed_at' NEW_INDEX_NAME_1 = 'index_issues_on_project_id_closed_at_desc_state_id_and_id' NEW_INDEX_NAME_2 = 'index_issues_on_project_id_closed_at_state_id_and_id' def up # Index to improve performance when sorting issues by closed_at desc unless index_exists_by_name?(:issues, NEW_INDEX_NAME_1) add_concurrent_index :issues, 'project_id, closed_at DESC NULLS LAST, state_id, id', name: NEW_INDEX_NAME_1 end # Index to improve performance when sorting issues by closed_at asc # This replaces the old index which didn't account for state_id and id unless index_exists_by_name?(:issues, NEW_INDEX_NAME_2) add_concurrent_index :issues, [:project_id, :closed_at, :state_id, :id], name: NEW_INDEX_NAME_2 end remove_concurrent_index_by_name :issues, OLD_INDEX_NAME end def down add_concurrent_index :issues, [:project_id, :closed_at], name: OLD_INDEX_NAME remove_concurrent_index_by_name :issues, NEW_INDEX_NAME_1 remove_concurrent_index_by_name :issues, NEW_INDEX_NAME_2 end end