解锁存储过程是不是有问题啊？

[fionazou]

过程如下：
CREATE procedure sp_who_lock
as
begin
declare @spid int,@bl int,
@intTransactionCountOnEntry int,
@intRowcount int,
@intCountProperties int,
@intCounter int,
@exec nvarchar(4000)
create table #tmp_lock_who (
id int identity(1,1),
spid smallint,
bl smallint)

IF @@ERROR<>0 RETURN @@ERROR

insert into #tmp_lock_who(spid,bl) select 0 ,blocked
from (select * from sysprocesses where blocked>0 ) a
where not exists(select * from (select * from sysprocesses where blocked>0 ) b
where a.blocked=spid)
union select spid,blocked from sysprocesses where blocked>0

IF @@ERROR<>0 RETURN @@ERROR

-- 找到临时表的记录数
select @intCountProperties = Count(*),@intCounter = 1
from #tmp_lock_who

IF @@ERROR<>0 RETURN @@ERROR

if @intCountProperties=0
select '现在没有阻塞和死锁信息' as message

-- 循环开始
while @intCounter <= @intCountProperties
begin
-- 取第一条记录
select @spid = spid,@bl = bl
from #tmp_lock_who where Id = @intCounter
begin
if @spid =0
select '引起数据库死锁的是: '+ CAST(@bl AS VARCHAR(10)) + '进程号,其执行的SQL语法如下'
else
select '进程号SPID：'+ CAST(@spid AS VARCHAR(10))+ '被' + '进程号SPID：'+ CAST(@bl AS VARCHAR(10)) +'阻塞,其当前进程执行的SQL语法如下'
DBCC INPUTBUFFER (@bl )
select @exec='kill '+rtrim(@bl)
exec (@exec)
end


-- 循环指针下移
set @intCounter = @intCounter + 1
end

drop table #tmp_lock_who

return 0
end
GO


我明明看到有阻塞，可是执行的结果却显示‘现在没有阻塞和死锁信息' ，帮我看看！

[fionazou]

怎么没人回复啊？

[Garnett_KG]

[Quote=引用 2 楼 bwu851 的回复:]

你为什么最后用个'UNION'? --- 这样一来, 前面的还有必要吗???
[/Quote]

SPID=0的是死锁进程，UNION后的是阻塞的SPID。

select 0 ,blocked 
from (
       select * 
       from sysprocesses 
       where blocked>0 
     ) a 
where not exists
    (
    select * 
    from 
        (
         select * from sysprocesses where blocked>0 
        ) b 
    where a.blocked=spid
    ) 
         
UNION
select spid,blocked from sysprocesses where blocked>0 

[bwu851]

[Quote=引用 1 楼 fionazou 的回复:]
怎么没人回复啊？
[/Quote]

LZ能不能把下面的逻辑讲讲?

select 0 ,blocked 
          from (select * from sysprocesses where blocked>0 ) a 
          where not exists(select * from (select * from sysprocesses where blocked>0 ) b 
          where a.blocked=spid) 
          union select spid,blocked from sysprocesses where blocked>0 

你为什么最后用个'UNION'? --- 这样一来, 前面的还有必要吗???