Remove XML Nodes for matching attribute condition in SQLServer

Question

I want to remove all the nodes in XML datatype column; matching the attribute condition for all the records.For example <resource> node which has attribute "type" whose value is like '%audio%'.

Input:

<metadata Item="1234" version="5" packageVersion="5" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2">
  <contents>
    <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
      <resources />
    </content>
    <content version="3" href="content_en-us.xml" lang="en-us">
      <resources>
        <resource type="image/svg" href="girlwateringtomatoes2.svg" />
        <resource type="audio/ogg" href="Audio/115988A_Sound1.ogg" />
        <resource type="audio/mp4" href="Audio/115988A_Sound1.m4a" />  
      </resources>
    </content>
  </contents>
  <references />
  <brailleEncodings />
</metadata>

Output:

<metadata Item="1234" version="5" packageVersion="5" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2">
  <contents>
    <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
      <resources />
    </content>
    <content version="3" href="content_en-us.xml" lang="en-us">
      <resources>
        <resource type="image/svg" href="girlwateringtomatoes2.svg" /> 
      </resources>
    </content>
  </contents>
  <references />
  <brailleEncodings />
</metadata>

Here is the query which i have tried but didn't work.

;WITH XMLNAMESPACES ('http://www.imsglobal.org/xsd/imsqti_v2p2' AS NS)
Update dbo.TableX 
SET [XML].modify('delete /NS:metadata/NS:contents/NS:content[2]/resources/resource[@type != "image/svg"]')

Thanks!

Lukasz Szozda · Accepted Answer · 2016-03-09 16:44:28Z

If you want to remove everything that has type like audio you could use contains:

;WITH XMLNAMESPACES ('http://www.imsglobal.org/xsd/imsqti_v2p2' AS NS)
Update TableX 
SET [XML].modify('delete /NS:metadata/NS:contents/NS:content[2]/NS:resources/NS:resource[contains(@type, "audio")]');

LiveDemo

Output:

<metadata xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2" Item="1234" version="5" packageVersion="5">
   <contents>
      <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
         <resources />
      </content>
      <content version="3" href="content_en-us.xml" lang="en-us">
         <resources>
            <resource type="image/svg" href="girlwateringtomatoes2.svg" />
         </resources>
      </content>
   </contents>
   <references />
   <brailleEncodings />
</metadata>

Alternatively in any position in XML document:

;WITH XMLNAMESPACES (DEFAULT 'http://www.imsglobal.org/xsd/imsqti_v2p2' )
Update TableX 
SET [XML].modify('delete //resources/resource[contains(@type, "audio")]');

LiveDemo2

Gottfried Lesigang · Accepted Answer · 2016-03-09 16:33:18Z

3

Try it like this, it's a namespaces issue...

declare @x table(myXML xml);
insert into @x values(
'<metadata Item="1234" version="5" packageVersion="5" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2">
  <contents>
    <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
      <resources />
    </content>
    <content version="3" href="content_en-us.xml" lang="en-us">
      <resources>
        <resource type="image/svg" href="girlwateringtomatoes2.svg" />
        <resource type="audio/ogg" href="Audio/115988A_Sound1.ogg" />
        <resource type="audio/mp4" href="Audio/115988A_Sound1.m4a" />  
      </resources>
    </content>
  </contents>
  <references />
  <brailleEncodings />
</metadata>');

;WITH XMLNAMESPACES (DEFAULT 'http://www.imsglobal.org/xsd/imsqti_v2p2')
Update @x 
SET [myXML].modify('delete /metadata/contents/content[2]/resources/resource[@type != "image/svg"]')

SELECT * FROM @x;

answered Mar 9, 2016 at 16:33

Gottfried Lesigang

67.6k9 gold badges60 silver badges124 bronze badges

1 Comment

Dan Field Over a year ago

yup - alternatively add the NS: prefix to ech node down the chain.

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