如下代码来自? http://www.iteye.com/topic/1026084?

1.drop procedure if exists `sp_nested_cursor`;??
2.create procedure `sp_nested_cursor`()??
3.begin?
4.??? declare v_uid bigint(22);??
5.??? declare v_code varchar(100);??
6.??? declare v_value varchar(100);??
7.??? declare _done TINYINT(1) default 0;??
8.??? declare cur_user cursor for select id from `tb_user`;??
9.??? declare continue handler for not found set _done = 1;??
10.??????
11.??? open cur_user;??
12.??? loop_xxx:loop??
13.??????? fetch cur_user into v_uid;??
14.??????? if _done=1 then?
15.??????????? leave loop_xxx;??
16.??????? end if;??
17.??????? begin?
18.??????????? declare _inner tinyint(1) default 0;??
19.??????????? declare cur_param cursor for select code, value???
20.???????????????????????????????????????? from `tb_user_param`???
21.???????????????????????????????????????? where user_id=v_uid;??
22.??????????? declare continue handler for not found set _inner = 1;???
23.??????????? open cur_param;??
24.??????????? loop_yyy:loop??
25.??????????????? fetch cur_param into v_code, v_value;??
26.??????????????? if _inner=1 then?
27.??????????????????? leave loop_yyy;??
28.??????????????? end if;??
29.??????????????? insert into tb_key_value values (v_uid, v_code, v_value);??
30.??????????? end loop;??
31.??????????? commit;??
32.??????? end;??
33.??? end loop;??
34.end;??

?

?

在sqlyog enterprise工具中执行

Error Code : 1064
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 'loop_yyy:loop
???????????????? fetch cur_param into v_code, v_value' at line 1
(0 ms taken)

mysql5.0 不支持这种写法？