Remove an element from XML present in CLOB column

Question

Hi,
I need to remove element TEST2 and TEST3 from the below XML which is present in the CLOB column of a table. I need to do this using DBMS_XMLDOM package of Oracle as my existing code is using the same -
<ROOT>
<LEAF1>
<TEST1>TEXT1</TEST1>
<TEST2>TEXT2</TEST2>
<TEST3>TEXT3</TEST3>
</LEAF1>
</ROOT>
Hence the final o/p should be like
<ROOT>
<LEAF1>
<TEST1>TEXT1</TEST1>
</LEAF1>
</ROOT>
Please suggest how to achieve this.

Answer 1

Something like this?
Anton
declare
  t_doc dbms_xmldom.DOMDocument;
  t_root dbms_xmldom.DOMNode;
  t_node dbms_xmldom.DOMNode;
  t_buf varchar2(1000);
begin
  t_doc := dbms_xmldom.newDOMDocument( xmltype( '<ROOT>
<LEAF1>
<TEST1>TEXT1</TEST1>
<TEST2>TEXT2</TEST2>
<TEST3>TEXT3</TEST3>
</LEAF1>
</ROOT>' ) );
  t_root := dbms_xmldom.makeNode( t_doc );
  t_node := dbms_xmldom.removeChild( t_root, dbms_xslprocessor.selectSingleNode( t_root, '/ROOT/LEAF1/TEST2' ) );
  t_node := dbms_xmldom.removeChild( t_root, dbms_xslprocessor.selectSingleNode( t_root, '/ROOT/LEAF1/TEST3' ) );
  dbms_xmldom.writetoBuffer( t_root, t_buf );
  dbms_output.put_line( t_buf );
end;