mysql error 1415 not allowed to return a result set from a trigger

环境：win 7，mysql5.5

mysql上创建触发器：

create trigger neworder after insert on orders for each row select new.order_num

错误：

error 1415 not allowed to return a result set from a trigger

修改：

create trigger neworder after insert on orders for each row select new.order_num into @ee