-- CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
-- BEGIN
--     EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
--                     FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
-- END;
-- $$ LANGUAGE plpgsql;

-- CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
-- BEGIN
--     IF (
--         NEW IS DISTINCT FROM OLD AND
--         NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
--     ) THEN
--         NEW.updated_at := current_timestamp;
--     END IF;
--     RETURN NEW;
-- END;
-- $$ LANGUAGE plpgsql;