Error in query: SELECT *, (MATCH(`desc`,`head`,`item`)AGAINST ('0' IN BOOLEAN MODE)) as relevance FROM search WHERE MATCH(`desc`,`head`,`item`)AGAINST('0' IN BOOLEAN MODE) ORDER BY relevance DESC LIMIT -30,30. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-30,30' at line 3