id_, url_, code_, user_id_, import_time_, update_time_, status_ insert into app_redemption_code(url_, code_, user_id_, import_time_, update_time_, status_) values (#{entity.url}, #{entity.code}, #{entity.userId}, #{entity.importTime}, #{entity.updateTime}, #{entity.status}) select * from app_redemption_code rc where rc.user_id_ is null order by rc.import_time_ desc limit 1 for update; select count(1) from app_redemption_code rc where rc.user_id_ is null