mysql全文搜索问题-->千里冰封转移

CREATE PROCEDURE `keyToSearch`(in searchKey varchar(100))
begin
declare keyStr varchar(100);
set keyStr = searchKey;
SELECT id, title,content, MATCH (title,content) AGAINST
(keyStr) AS score
FROM generalmessage WHERE MATCH (title,content) AGAINST
(keyStr);
end;

查询到0条记录， 怎么办啊？？？？