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这个问题与在 SQL Server 的单个 XQuery 中删除多个节点有关。不同之处在于我想不加选择地删除文档中的所有节点。

XML:

<root>      
    <Attachment id="Holding_1_attachment_0">
      <AttachmentData>(B64 Enconded string)</AttachmentData>
      <MimeTypeTC tc="17" />
      <AttachmentLocation tc="2">URL Reference</AttachmentLocation>
    </Attachment>
    <Attachment id="Holding_1_attachment_0">
      <AttachmentData>(B64 Enconded string)</AttachmentData>
      <MimeTypeTC tc="17" />
      <AttachmentLocation tc="2">URL Reference</AttachmentLocation>
    </Attachment>
    <Attachment id="234">
      <AttachmentBasicType tc="3">File</AttachmentBasicType>
      <AttachmentSource>C:\Windows Ding.wav</AttachmentSource>
      <AttachmentData>(B64 Enconded string)</AttachmentData>
      <MimeTypeTC tc="7">WAV</MimeTypeTC>
      <TransferEncodingTypeTC tc="4">Base64</TransferEncodingTypeTC>
      <AttachmentLocation tc="1">Inline</AttachmentLocation>
      <FileName>Windows Ding.wav</FileName>
    </Attachment>
    <Attachment id="234">
      <AttachmentBasicType tc="3">File</AttachmentBasicType>
      <AttachmentSource>C:\Windows Ding.wav</AttachmentSource>
      <AttachmentData>(B64 Enconded string)</AttachmentData>
      <MimeTypeTC tc="7">WAV</MimeTypeTC>
      <TransferEncodingTypeTC tc="4">Base64</TransferEncodingTypeTC>
      <AttachmentLocation tc="1">Inline</AttachmentLocation>
      <FileName>Windows Ding2.wav</FileName>
    </Attachment>
</root>

本质上，我有一个包含上述 XML 的巨大文档，我想要么删除所有Attachment节点（包括子节点），要么删除AttachmentData节点（我还没有完全决定要使用哪种方法）。

我尝试了以下方法来删除节点：

UPDATE tblXmlDocumentData
SET DocumentXml = DocumentXml.modify('delete (//Attachment)') /* or //Attachment/AttachmentData */
Where DocumentId = 1

SQL 回复的内容： Incorrect use of the XML data type method 'modify'. A non-mutator method is expected in this context.

我假设这是因为我没有指定Attachment要删除的节点。我可以删除所有节点而不必一次删除一个吗？

4

1 回答 1

1

试试这个查询：

UPDATE tblXmlDocumentData
SET DocumentXml.modify('delete (//Attachment)') 
Where DocumentId = 1
于 2014-01-17T18:53:08.243 回答