我可以在多个CPU上分布一个长时间运行的存储过程吗?

[也在超级用户上- https://superuser.com/questions/116600/can-i-spead-out-a-long-running-stored-proc-accross-multiple-cpus ]

我在SQL Server的gets中有一个存储过程,并对一块数据进行解密。(这种情况下是信用卡。)

大多数情况下,性能是可以接受的,但是有几个客户的流程非常缓慢,实际需要1分钟才能完成。(准确地说,从SQL Server返回59377ms,但根据负载的不同,可能会有几百ms的变化)

当我观察这个过程时,我看到SQL只使用一个过程来执行整个过程,而且通常只使用过程0。

有没有一种方法可以更改我的存储过程,以便SQL可以多线程处理这个过程?欺骗和将呼叫分成两半(前50%,后50%)并以粗暴的方式分散负载是可行的吗?(只是在这里吐痰)

我存储的进程:

USE [Commerce]
GO
/****** Object:  StoredProcedure [dbo].[GetAllCreditCardsByCustomerId]    Script Date: 03/05/2010 11:50:14 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[GetAllCreditCardsByCustomerId]
@companyId UNIQUEIDENTIFIER, @DecryptionKey NVARCHAR (MAX)
AS
SET NoCount ON

DECLARE @cardId uniqueidentifier
DECLARE @tmpdecryptedCardData VarChar(MAX);
DECLARE @decryptedCardData VarChar(MAX);

    DECLARE @tmpTable as Table 
    (
        CardId uniqueidentifier,
        DecryptedCard NVarChar(Max)
    )

DECLARE creditCards CURSOR FAST_FORWARD READ_ONLY
  FOR  Select cardId from CreditCards where companyId = @companyId and Active=1 order by addedBy desc



--2 
OPEN creditCards
--3 
FETCH creditCards INTO @cardId   -- prime the cursor

WHILE @@Fetch_Status = 0 
  BEGIN

        --OPEN creditCards
        DECLARE creditCardData CURSOR FAST_FORWARD READ_ONLY
                        FOR select convert(nvarchar(max), DecryptByCert(Cert_Id('Oh-Nay-Nay'), EncryptedCard, @DecryptionKey)) FROM CreditCardData where cardid = @cardId order by valueOrder

                OPEN creditCardData

                FETCH creditCardData INTO @tmpdecryptedCardData   -- prime the cursor

                WHILE @@Fetch_Status = 0 
                    BEGIN               

                        print 'CreditCardData'
                        print @tmpdecryptedCardData                     

                        set @decryptedCardData = ISNULL(@decryptedCardData, '') + @tmpdecryptedCardData
                        print '@decryptedCardData'
                        print @decryptedCardData;

                        FETCH NEXT FROM creditCardData INTO @tmpdecryptedCardData   -- fetch next
                    END 
                    CLOSE creditCardData
                    DEALLOCATE creditCardData       

                    insert into @tmpTable (CardId, DecryptedCard) values (  @cardId, @decryptedCardData )
                    set @decryptedCardData = ''


    FETCH NEXT FROM creditCards INTO @cardId   -- fetch next
  END

select CardId, DecryptedCard FROM @tmpTable


CLOSE creditCards
DEALLOCATE creditCards