-- Revert gaia:api_2018_07_12_add_related_fields from mysql

BEGIN;

DROP TABLE IF EXISTS `polymer_polymercontent_cities`;
ALTER TABLE `polymer_polymercontent` DROP COLUMN `start_time`;
ALTER TABLE `polymer_polymercontent` DROP COLUMN `end_time`;
ALTER TABLE `polymer_polymercontent` DROP COLUMN `is_online`;
ALTER TABLE `polymer_polymercontent` DROP COLUMN `is_related_city`;

COMMIT;
