如何在相关查询中使用WITH XMLNAMESPACES子句？

Question

我试图使用SQL Server的FOR XML功能来生成一些XML和一些特定的命名空间。

我的目标XML应该是这个样子：

<ns1:CustomerInvoices xmlns:ns1="urn:example.com:Invoice:01.00"> 
    <CustomerInvoice> 
    <Header> 
     <OrderDate>2001-11-13T00:00:00</OrderDate> 
     <SalesOrderNumber>SO44643</SalesOrderNumber> 
    </Header> 
    <Lines> 
     <LineTotal>3578.270000</LineTotal> 
     <UnitPrice>3578.2700</UnitPrice> 
     <OrderQty>1</OrderQty> 
    </Lines> 
    </CustomerInvoice> 
    <CustomerInvoice>...(abbreviated)...</CustomerInvoice> 
</ns1:CustomerInvoices> 

我的问题是，当我使用WITH XMLNAMESPACES条款，是出现在很多的子节点，由第三方消费者的命名空间声明此XML的 “宁可不要让”，即我在做这样的事情：

Use AdventureWorks2008 

;WITH XMLNAMESPACES ('urn:example.com:Invoice:01.00' as ns1) 

SELECT  (SELECT  hdr.OrderDate, 
         hdr.SalesOrderNumber 
      FOR XML PATH (''), TYPE) AS Header, 
      (SELECT  line.LineTotal, 
         line.UnitPrice, 
         line.OrderQty 

      FROM  Sales.SalesOrderDetail AS line 

      WHERE  line.SalesOrderID = hdr.SalesOrderID 
      FOR XML PATH (''), TYPE) AS Lines 

FROM  Sales.SalesOrderHeader AS hdr 

WHERE  hdr.ModifiedDate = '2001-11-20' 

FOR XML PATH('CustomerInvoice'), ROOT('ns1:CustomerInvoices') 

其中给出：

<ns1:CustomerInvoices xmlns:ns1="urn:example.com:Invoice:01.00"> 
    <CustomerInvoice> 
    <Header> 
     <OrderDate xmlns:ns1="urn:example.com:Invoice:01.00">2001-11-13T00:00:00</OrderDate> 
     <SalesOrderNumber xmlns:ns1="urn:example.com:Invoice:01.00">SO44643</SalesOrderNumber> 
    </Header> 
    <Lines> 
     <LineTotal xmlns:ns1="urn:example.com:Invoice:01.00">3578.270000</LineTotal> 
     <UnitPrice xmlns:ns1="urn:example.com:Invoice:01.00">3578.2700</UnitPrice> 
     <OrderQty xmlns:ns1="urn:example.com:Invoice:01.00">1</OrderQty> 
    </Lines> 
    </CustomerInvoice> 
    <CustomerInvoice>...(abbreviated)...</CustomerInvoice> 
</ns1:CustomerInvoices> 

是否可以对查询进行调整以使命名空间正确，还是必须将其加载到“其他”来删除冗余名称空间声明？

Answer 1

你并不孤单。

http://connect.microsoft.com/SQLServer/feedback/details/265956/suppress-namespace-attributes-in-nested-select-for-xml-statements

我建议upvoting的改善。

周围有列在Connect网站上面的工作：

http://www.olcot.co.uk/sql-blogs/suppressing-namespace-attributes-in-nested-select-statements-when-using-for-xml-workaround

追加/编辑：

第二个链接我张贴以上是已经死了。

这里是一个不同的链接：

http://www.sqlservercentral.com/blogs/rocks/2012/08/28/suppressing-namespace-attributes-in-nested-select-statements-when-using-for-xml-workaround/