SELECT ie_id, iid, itf_id, CONVERT(GROUP_CONCAT(stuff) USING utf8) as stuff from dp_information_extends_text where ie_id='3mr3l3qj4b2icbp6bew16wdrlp7764s9fnfu';
relation表，针对ird_id，多个or查询，无索引耗时1111秒，有索引0.062ms秒开。
