不在DataSet中显示动态SQL的列

时间:2015-11-09 09:18:22

标签: sql sql-server sql-server-2008 dynamic-sql

我有以下SP在单独运行时正常工作:

ALTER PROCEDURE [dbo].[sgetInvoiceHeaderDetails]

@InvoiceNo varchar(max)
AS
BEGIN
SET FMTONLY ON;
    declare @sql varchar(max)

set @sql = 'SELECT IH.InvoiceNo, IH.InvoiceDate, IH.InvoiceTime, C.Name, R.Name AS Customer, IH.NetAmount, 
IM.Name AS Item, ID.UnitPrice, ID.Qty, ID.Total, ID.BatchNo
FROM InvoiceHeader AS IH INNER JOIN
InvoiceDetail AS ID ON IH.InvoiceNo = ID.InvoiceNo INNER JOIN
Customer AS C ON IH.CustomerId = C.Id INNER JOIN
Route AS R ON IH.RouteId = R.Id INNER JOIN
ItemMaster AS IM ON ID.ItemMasterId = IM.Id
WHERE IH.InvoiceNo IN ('+@InvoiceNo+')'
print @sql
exec (@sql)
END

我遇到的问题是,当我为报告添加DataSet时,它会在Fields部分中不提取任何字段/列。我猜它是由于动态SQL?

我该如何解决?

enter image description here

1 个答案:

答案 0 :(得分:1)

作为我在评论中的状态,你应该避免使用动态方法。

为了在SQL中为您提供纯粹的内联解决方案,请看一下:

DECLARE @tbl TABLE(ID INT, Caption VARCHAR(100));
INSERT INTO @tbl VALUES(1,'Test 1'),(2,'Test 2'),(3,'Test 3'),(4,'Test 4'),(5,'Test 5');

DECLARE @WantToGet VARCHAR(100)='1,3,4';

WITH Splitted AS
(
    SELECT CAST('<x>' + REPLACE(@WantToGet,',','</x><x>') + '</x>' AS XML) AS AsXml
)
,SplittedAsList AS
(
    SELECT The.Node.value('.','int') As ID
    FROM Splitted
    CROSS APPLY AsXml.nodes('/x') AS The(Node)
)
SELECT Caption
FROM @tbl AS tbl
INNER JOIN SplittedAsList sal ON sal.ID = tbl.ID;

字符串1,3,4被拆分为列表。最后的INNER JOIN与您想要使用IN子句完全相同。

这种方法可以在表值函数内进行(确保将其保留为内联函数!)。这个功能在任何地方都可以更好地重复使用。

第二个可推荐的方法是CREATE TYPE,这需要在应用方面采取更多行动......