在SQL SERVER中定时解锁

* 取消进程的条件：
* 1、锁住了其他进程。
* 2、自身没有被其他进程锁住。
* 3、此进程已经空闲了2分钟以上。
*
*/


DECLARE
@USER_ID INT
, @KILLCMD VARCHAR(100)
, @WAIT_TIME INT
-- 设置空闲时间
SET @WAIT_TIME = 2;
-- 根据选择条件，选择出应该取消的进程
DECLARE cur_lock CURSOR FOR
SELECT spid
FROM master..sysprocesses
WHERE
DATEDIFF(minute, last_batch, getdate()) > @WAIT_TIME
AND blocked = 0
AND spid IN
(SELECT blocked
FROM master..sysprocesses);
-- 取消所有选择出的进程。
OPEN cur_lock;
FETCH NEXT FROM cur_lock INTO @USER_ID;
WHILE @@FETCH_STATUS = 0
BEGIN
SET @KILLCMD = 'kill ' + CAST(@USER_ID AS VARCHAR);
EXECUTE (@KILLCMD);
FETCH NEXT FROM cur_lock INTO @USER_ID;
END;
CLOSE cur_lock;
DEALLOCATE cur_lock;