1
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
BEGIN TRAN
DECLARE @res INT
EXEC @res = sp_getapplock
@Resource = 'This a Lock ID 3',
@LockMode = 'Exclusive',
@LockOwner = 'Transaction',
@LockTimeout = 60000,
@DbPrincipal = 'public'
if @res < 0
begin
declare @errorMessage nvarchar(200)
set @errorMessage = case @res
when -1 then 'Applock request timed out.'
when -2 then 'Applock request canceled.'
when -3 then 'Applock involved in deadlock'
else 'Parameter validation or other call error.'
end
raiserror (@errorMessage,16,1)
end
/*
INSERT AND UPDATE STATEMENTS HERE
...
...
*/
COMMIT TRANSACTION -- THIS RELEASES THE APPLOCK
RETURN 0;
END TRY
BEGIN CATCH
-- ROLLBACK TRANSACTION IF NEEDED
IF @@TRANCOUNT > 0
ROLLBACK
/*
Exception handling stuff here. Should I call sp_releaseapplock?
...
...
*/
-- return the success code
RETURN -1;
END CATCH
중복 : http://stackoverflow.com/questions/1380707/sql-2005-spgetapplock-when-to-call- 출연 알리미 –