sp_xml_preparedocument and use of the Namespace. I get an error "XML parsing error: Reference to undeclared namespace prefix: 'a'." in SQL Server 2012

Question

请帮忙。看完所有 google 和 Whosebug :) 我的大脑不再工作了。

我有以下 TSQL（运行在 SQL Server 2012 上）

我不知道我需要在哪里声明我的 a: 命名空间？我需要声明多少个命名空间？

DECLARE @XML AS XML
DECLARE @hDoc AS INT

SELECT @XML = '<GetAssetWarrantyResponse xmlns="http://tempuri.org/">
  <GetAssetWarrantyResult xmlns:a="http://schemas.datacontract.org/2004/07/Dell.AWR.Domain.Asset" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
    <a:Faults />
    <a:Response>
      <a:DellAsset>
        <a:AssetParts i:nil="true" />
        <a:CountryLookupCode>5252</a:CountryLookupCode>
        <a:CustomerNumber>645651</a:CustomerNumber>
      </a:DellAsset>
    </a:Response>
  </GetAssetWarrantyResult>
</GetAssetWarrantyResponse>'

EXEC sp_xml_preparedocument @hDoc OUTPUT, @XML

SELECT CountryLookupCode
FROM OPENXML(@hDoc, 'GetAssetWarrantyResponse/GetAssetWarrantyResult/a:Response/a:DellAsset')
WITH 
(
CountryLookupCode   [nvarchar](20)  'a:CountryLookupCode'
)

EXEC sp_xml_removedocument @hDoc
GO

Answer 1

调用时需要指定命名空间前缀sp_xml_preparedocument。在这种情况下，您有 a 命名空间和默认命名空间（没有前缀的命名空间：xmlns="...."）：

EXEC sp_xml_preparedocument 
        @hDoc OUTPUT
        , @XML
        , '<root xmlns:d="http://tempuri.org/" xmlns:a="http://schemas.datacontract.org/2004/07/Dell.AWR.Domain.Asset"/>'

并正确使用已注册的前缀:

SELECT CountryLookupCode
FROM OPENXML(@hDoc, 'd:GetAssetWarrantyResponse/d:GetAssetWarrantyResult/a:Response/a:DellAsset')
WITH 
(
    CountryLookupCode   [nvarchar](20)  'a:CountryLookupCode'
)

Answer 2

我会在 SQL 服务器中使用 内置的原生 XQuery 支持：

DECLARE @XML AS XML

SELECT @XML = '<GetAssetWarrantyResponse xmlns="http://tempuri.org/">
  <GetAssetWarrantyResult xmlns:a="http://schemas.datacontract.org/2004/07/Dell.AWR.Domain.Asset" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
    <a:Faults />
    <a:Response>
      <a:DellAsset>
        <a:AssetParts i:nil="true" />
        <a:CountryLookupCode>5252</a:CountryLookupCode>
        <a:CustomerNumber>645651</a:CustomerNumber>
      </a:DellAsset>
    </a:Response>
  </GetAssetWarrantyResult>
</GetAssetWarrantyResponse>'

;WITH XMLNAMESPACES(DEFAULT 'http://tempuri.org/', 'http://schemas.datacontract.org/2004/07/Dell.AWR.Domain.Asset' AS ns)
SELECT
    @XML.value('(GetAssetWarrantyResponse/GetAssetWarrantyResult/ns:Response/ns:DellAsset/ns:CountryLookupCode)[1]', 'int')

就 XML 命名空间而言：您需要在 XML 文档中定义 所有使用的 直到您想要获得数据来自

sp_xml_preparedocument and use of the Namespace. I get an error "XML parsing error: Reference to undeclared namespace prefix: 'a'." in SQL Server 2012

sp_xml_preparedocument and use of the Namespace. I get an error "XML parsing error: Reference to undeclared namespace prefix: 'a'." in SQL Server 2012

xml

sql-server

namespaces