mysql 存储过程游标学习

drop procedure if exists my_procedure;
create procedure my_procedure()
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE _list_name char;
DECLARE _list_id int;
DECLARE _cur CURSOR for select list_id,list_name from aa_list;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;

open _cur;
_f_loop:LOOP
FETCH _cur into _list_id,_list_name;
IF done then leave _f_loop;
END IF;
select _list_id as list_id,_list_name as list_name;
END LOOP _f_loop;
close _cur;
END;