这个过程在MySQL 5中有效,但在MySQL6中失败了,为什么?

程序:

delimiter |
create procedure  pro_regs(in username varchar(50), 
                           in pwd varchar(50), 
                           in email varchar(50), 
                           in address varchar(50)) 
  begin  

     insert into regists 
       ( `user_name` , `user_psd` , `user_email` , `user_address`)
     values
       (username, pwd, email, address);

  end|

有人知道吗?