Please help with how to remove attribute

Question

Hi to all,
I am having some serious problems with removeAttribute (or more like remove anything). I want to remove an attribute from an element, but it just doesn't seem to work no matter what I do.
The following is an example of the xml:
<diffgr:diffgram xmlns:diffgr="urn:pgwc-gov-za:diffgram">
<DataInstance>
<ROW diffgr:id="3240DEAFE594482B86B3A31E77A13975" diffgr:hasChanges="inserted">
<VALUE>VALUE 1</VALUE>
</ROW>
</DataInstance>
</diffgr:diffgram>
I want to remove the diffgr:hasChanges attribute. I have searched high and low and can't find an example of how to do this. Could someone give me a quick example?
Thanks,
DayneO

Answer 1

You can make use of DELETEXML
scott@mydb> create table sun_xml(xmlcol xmltype);
Table created.
scott@mydb> insert into sun_xml
  2  values(xmltype('<diffgr:diffgram xmlns:diffgr="urn:pgwc-gov-za:diffgram">
  3  <DataInstance>
  4  <ROW diffgr:id="3240DEAFE594482B86B3A31E77A13975" diffgr:hasChanges="inserted">
  5  <VALUE>VALUE 1</VALUE>
  6  </ROW>
  7  </DataInstance>
  8  </diffgr:diffgram>'));
1 row created.
scott@mydb> update sun_xml
  2  set xmlcol = deletexml(xmlcol,'//DataInstance/ROW/@diffgr:hasChanges','xmlns:diffgr="urn:pgwc-gov-za:diffgram"');
1 row updated.
scott@mydb> select * from sun_xml;
XMLCOL
<diffgr:diffgram xmlns:diffgr="urn:pgwc-gov-za:diffgram">
  <DataInstance>
    <ROW diffgr:id="3240DEAFE594482B86B3A31E77A13975">
      <VALUE>VALUE 1</VALUE>
    </ROW>
  </DataInstance>
</diffgr:diffgram>