sql server 2012 执行计划 set showplain_all on

Hi All:

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO
IF OBJECT_ID('UF_GETPARTITIONID') IS NOT NULL
BEGIN
PRINT 'Dropping function UF_GETPARTITIONID'
DROP FUNCTION UF_GETPARTITIONID
IF @@ERROR = 0
PRINT 'Function UF_GETPARTITIONID dropped'
END
GO
CREATE FUNCTION [dbo].UF_GETPARTITIONID()
RETURNS BIGINT
AS
BEGIN
DECLARE @PARTITIONID BIGINT = NULL
SELECT  @PARTITIONID=RECID FROM DBO.PARTITIONS WITH(NOLOCK)   where partitionkey='initial'
RETURN @PARTITIONID
END
GO

Calling function dbo.uf_getpartitionid()



2.Adding column partition to the query and compareits query plan to a traditional one.

SELECT DATAAREAID,[PARTITION],ACCOUNTNUM,TRANSDATE,VOUCHER FROM custtrans
WHERE  DATAAREAID = '835' AND [PARTITION] = '5637144576' AND ACCOUNTNUM =        '835-000112' AND
TRANSDATE > '2014-07-15' AND VOUCHER = 'AR-0000287'
GO
SELECT DATAAREAID,[PARTITION],ACCOUNTNUM,TRANSDATE,VOUCHER FROM custtrans
WHERE DATAAREAID = '835' AND [PARTITION] = dbo.uf_getpartitionid() --returns value of partition
AND ACCOUNTNUM =  '835-000112'  AND  TRANSDATE > '2014-07-15' AND VOUCHER = 'AR-0000287'

3.Query Plan: getting data through seeking relative indexes.