如何改进带有内连接的存储过程的代码以可能为空tvp

我想改进以下存储过程的代码。我想将它加入到单个选择语句中。你能找到更好的方法吗？

CREATE PROCEDURE [dbo].[pr_FinDocument_Filter]
  @finDocIdForFilter [dbo].[GuidList] READONLY,
  @filteredSid nvarchar(64),
  @filteringOffsetInDay int
AS
BEGIN

    IF (@filteredSid is null or @filteringOffsetInDay is null)
        BEGIN
            RAISERROR(N'arguments must have a value', 15, 1);
        END

    IF EXISTS (SELECT 1 FROM @finDocIdForFilter)
        BEGIN
            SELECT fin_doc_extra.docId
            FROM
                [CpsOther].[dbo].[FinDocumentExtra] AS fin_doc_extra
                INNER JOIN @finDocIdForFilter       AS fin_doc_for_filter
                    ON fin_doc_extra.docId = fin_doc_for_filter.Id
                    AND fin_doc_extra.sid = @filteredSid
            WHERE
                DATEDIFF(DAY, CONVERT(DATE, fin_doc_extra.value, 105), CONVERT(DATE, GETDATE(), 126)) = @filteringOffsetInDay
        END
    ELSE
        BEGIN
            SELECT fin_doc_extra.docId
            FROM
                [CpsOther].[dbo].[FinDocumentExtra] AS fin_doc_extra
            WHERE
                fin_doc_extra.sid = @filteredSid
                AND DATEDIFF(DAY, CONVERT(DATE, fin_doc_extra.value, 105), CONVERT(DATE, GETDATE(), 126)) = @filteringOffsetInDay
        END

END

我想这可能对你有用。

SELECT  fin_doc_extra.docID
FROM    [CpsOther].[dbo].[FinDocumentExtra] AS fin_doc_extra
WHERE   DATEDIFF(DAY, CONVERT(DATE, fin_doc_extra.value, 105),
                 CONVERT(DATE, GETDATE(), 126)) = @filteringOffsetInDay
        AND fin_doc_extra.sid = @filteredSid
        AND ( ( fin_doc_extra.docId IN ( SELECT fin_doc_for_filter.Id
                                         FROM   @finDocIdForFilter ) )
              OR ( NOT EXISTS ( SELECT  1
                                FROM    @finDocIdForFilter )
                 )
            );