sql使用游标插入数据 为什么出现死循环？

create table stu
(
id int,
names varchar(120)
)

insert into stu(id,names)
values (1,'wdl')

insert into stu(id,names)
values (2,'cyc')

insert into stu(id,names)
values (3,'zyz')

declare @id int
declare @names nvarchar(200)

declare myCursor cursor for

select id,names from stu
open myCursor
fetch next from myCursor into @id,@names

while @@FETCH_STATUS=0
begin
insert into dbo.stu values(@id+3,@names)
fetch next from myCursor into @id,@names
end
close myCursor
deallocate myCursor

select * from stu

确定不是特意写的死循环吗？一边先stu表插入新的记录，一边从stu表获取记录，fetch永远可以得到新记录，@@FETCH_STATUS=0永远为真，当然是死循环了。

@@FETCH_STATUS fetch成功就返回0.那你这fetch成功while就能一直循环，没办法停止下来肯定死循环了。