Question

我有以下sql存储过程：

USE [FishTrackerProfessional]
GO
/****** Object:  StoredProcedure [dbo].[CreateErsSalesAddSubmission]    Script Date: 08/06/2015 15:57:42 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[CreateErsSalesAddSubmission]

-- Add the parameters for the stored procedure here
@uname VARCHAR(10) ,
        @pword VARCHAR(10) ,
        @sntype VARCHAR(1) ,
        @action VARCHAR(10) ,
        @salesContractRef VARCHAR(10),

        @auctionId NCHAR(10) 

AS
BEGIN
  -- SET NOCOUNT ON added to prevent extra result sets from
  -- interfering with SELECT statements.
  SET NOCOUNT ON;

  -- Insert statements for procedure here
 SELECT
    RTRIM(@uname) AS '@uname',
    RTRIM(@pword) AS '@pword',

    (SELECT

        @snType AS '@snType',
        RTRIM(@action) AS '@action',
        COALESCE(@salesContractRef, '') AS '@salesContractRef',
        CONVERT(VARCHAR(10), DateOfPurchase, 112) AS '@saleDate',
        RTRIM(COALESCE(@auctionID, '')) AS '@auctionID',
        ISNULL(Logbook1 + ',', '') + ISNULL(Logbook2 + ',', '') + ISNULL(Logbook3 + ',', '') AS '@logBookNums',
        ISNULL(LandingDecNumber1 + ',', '') + ISNULL(LandingDecNumber2 + ',', '') + ISNULL(LandingDecNumber3 + ',', '') AS '@landingDecNums',
        COALESCE(VesselName, '') AS '@vesselName',
        RTRIM(VesselPLN) AS '@vesselPln',
        RTRIM(VesselOwner) AS '@vesselMasterOwner',
        COALESCE(CONVERT(VARCHAR(10), LandingDate1, 112), '') AS '@landingDate1',
        COALESCE(CONVERT(VARCHAR(10), LandingDate2, 112), '') AS '@landingDate2',
        COALESCE(CONVERT(VARCHAR(10), LandingDate3, 112), '') AS '@landingDate3',
        RTRIM(CountryOfLanding) AS '@countryOfLanding',
        RTRIM(PortOfLanding) AS '@portOfLanding',
        (SELECT

            COALESCE(RTRIM(SpeciesCode),'') AS '@speciesCode',
            RTRIM(FishingArea) AS '@faoAreaCode',
            COALESCE(RTRIM(IcesZone),'') AS '@ZoneCode',
            COALESCE(RTRIM(ld.DisposalCode),'') AS '@disposalCode',
            COALESCE(ld.FreshnessGrade,'') AS '@freshnessCode',
            COALESCE(ld.ProductSize,'') AS '@sizeCode',
            COALESCE(ld.PresentationCode,'') AS '@presentationCode',
            COALESCE(ld.PresentationState,'') AS '@stateCode',
            RTRIM(ld.NumberOfFish) AS '@numberOfFish',
            FORMAT(ld.Quantity, 'N2') AS '@weightKgs',
            FORMAT(Quantity * ld.UnitPrice, 'N2') AS '@value',
            COALESCE(ld.Currency,'') AS '@currencyCode',
            RTRIM(ld.WithdrawnDestinationCode) AS '@withdrawnDestinationCode',
            RTRIM(ld.BuyersRegistrationCode) AS '@buyerReg',
            RTRIM(ld.SalesContractRef) AS '@salesContractRef'

        FROM LandingDetails ld
        JOIN LandingHeaders lh
            ON ld.LandingId = lh.LandingId
        WHERE ld.LandingId = lh1.LandingId
        FOR XML PATH ('salesline'), TYPE)



    FROM LandingHeaders lh1

    WHERE lh1.AllocatedErsId IS NULL AND lh1.LandingDate1 BETWEEN '2015-05-01' AND '2015-05-30'
    ORDER BY VesselName,lh1.LandingId

    FOR XML PATH ('salesnote'), TYPE)
FOR XML PATH ('ers')
END

当从ssms内部运行时，它能够返回大量信息。但是，当这个过程被映射到我的entitydata模型中的一个函数时，返回一个类型为string的标量，它只返回它的一小部分。

我开始认为ssms是专门用于显示使用for xml的查询结果的，因此除非我可以做其他事情，否则这对我来说将是一个潜在的问题。

我知道我可以从ssms结果中保存此sproc的结果，并且它将全部保存到单个xml文件中。因此，可以从sproc中指示将结果保存到特定名称的文件中（例如公共文档文件夹之类的公共文件），并且在运行该过程时应始终覆盖它。

由于

Answer 1

有可能，但我不确定它真的是个好主意。您的SQL Server用户帐户需要额外的权限才能写入磁盘，您需要管理和维护一种方法，以确保您不会无意中覆盖文件（哪些SQL编程实际上不是设计为以及，例如，.NET），你的过程的任何消费者都需要一些特殊的知识（这个过程在其他地方返回它的结果集，这里是它发生故障时发生的错误代码或发生故障等）。

您确实最好只是确保正确使用您的程序。对于EF，这个问题可能会有所帮助：Entity framework calling a FOR XML stored procedure truncates at 2033 characters

但请记住，其他一些（非EntityFramework）客户端可能有一天会想要使用该SP - 以绕过这个EF特定限制的方式重写它可能会让这个消费者陷入困境，需要进一步的体操应该首先由EF客户端执行。或者，只需使用ADO.NET而不是EF来调用该过程 - 在我看来，在这种情况下执行此操作可能比尝试解决奇怪的EF限制更容易。

如何返回sql查询的所有结果或将其保存到文件中

1 个答案: