-- Revert gaia:answer_2017_05_17_alter_question_answer_table_topic_id from mysql

BEGIN;

-- XXX Add DDLs here.
ALTER TABLE `api_answer` DROP COLUMN `topicreply_id`;
ALTER TABLE `api_question` DROP COLUMN `problem_id`;
ALTER TABLE `api_answer_reply` DROP COLUMN `topicreply_id`;


COMMIT;
