Problems with DBMS_XMLDOM.appendChild

Question

Hi, I have the following function that appends a child node to a parent node and returns an XMLTYPE.
FUNCTION append_element(parent XMLType, child XMLType)
RETURN XMLTYPE DETERMINISTIC IS
   parent_document DBMS_XMLDOM.DOMDOCUMENT;
   parent_rootnode DBMS_XMLDOM.DOMNODE;
   child_document  DBMS_XMLDOM.DOMDOCUMENT;
   child_rootnode  DBMS_XMLDOM.DOMNODE;
BEGIN
   parent_document := DBMS_XMLDOM.newDOMDocument(parent);
   parent_rootnode := DBMS_XMLDOM.makeNode(DBMS_XMLDOM.getDocumentElement(parent_document));
   child_document  := DBMS_XMLDOM.newDOMDocument(child);
   child_rootnode  := DBMS_XMLDOM.makeNode(DBMS_XMLDOM.getDocumentElement(child_document));
   parent_rootnode := DBMS_XMLDOM.appendChild(parent_rootnode, child_rootnode);
   RETURN parent;
END append_element;The description of the DBMS_XMLDOM.appendChild method from Oracle is "Adds the node newChild to the end of the list of children of this node. If the newChild is already in the tree, it is first removed.", but in this case it's just adding another child. Here's how I'm using it:
PROCEDURE main IS
   v_xml XMLTYPE := XMLTYPE('<parent></parent>');
BEGIN
   v_xml := append_element(v_xml, XMLType('<child>one</child>'));
   v_xml := append_element(v_xml, XMLType('<child>two</child>'));
   htp.p('<textarea cols=50 rows=5>' || htf.escape_sc(v_xml.getClobVal()) || '</textarea>');
   htp.br;
END main;Produces:
<parent>
  <child>one</child>
  <child>two</child>
</parent>Why is this adding a second child and not deleting the first one?
Thanks,
Mike

Answer 1

9.2.0.1.0 is not supported for any XML DB functionality. Please upgrade to at least 9.2.0.3.0, or ideally 9.2.0.5.0 or 10.1.0.2.0 and try again