How to add: ?xml version="1.0"?

Question

Hi there,
Just a simple question: How to I add the processing instruction to the top of my xml file
using the xmldom?
Here is my PL/SQL code for the package body so far and it compiles and works fine.
======================================================================================
create or replace package body cardsXml is
procedure generate_xml_order(p_Order_No in NUMBER)
is
begin
DECLARE
doc xmldom.DOMDocument;
main_node xmldom.DOMNode;
root_node xmldom.DOMNode;
user_node xmldom.DOMNode;
item_node xmldom.DOMNode;
root_elmt xmldom.DOMElement;
item_elmt xmldom.DOMElement;
item_text xmldom.DOMText;
CURSOR get_fingers(v_Order_Num NUMBER) IS
SELECT length(RF.Minutia) Sze, RF.Finger_Cde, RF.Quality_Val
FROM sbs.Recipient_Finger RF
, sbs.Recipient R
, sbs.recipient_card RC
WHERE RC.order_no = v_Order_Num
AND RF.pin = R.pin
AND R.pin = RC.pin;
BEGIN
doc := xmldom.newDOMDocument;
main_node := xmldom.makeNode(doc);
root_elmt := xmldom.createElement(
doc
, 'FINGERS'
root_node := xmldom.appendChild(
main_node
, xmldom.makeNode(root_elmt)
FOR get_fingers_rec IN get_fingers(p_Order_No) LOOP
item_elmt := xmldom.createElement(
doc
, 'FINGER'
user_node := xmldom.appendChild(
root_node
, xmldom.makeNode(item_elmt)
-- Create user element: Size
item_elmt := xmldom.createElement(
doc
, 'SIZE'
item_node := xmldom.appendChild(
user_node
, xmldom.makeNode(item_elmt)
item_text := xmldom.createTextNode(
doc
, get_fingers_rec.Sze
item_node := xmldom.appendChild(
item_node
, xmldom.makeNode(item_text)
-- Create user element: FINGER_CDE
item_elmt := xmldom.createElement(
doc
, 'FINGER_CODE'
item_node := xmldom.appendChild(
user_node
, xmldom.makeNode(item_elmt)
item_text := xmldom.createTextNode(
doc
, get_fingers_rec.finger_cde
item_node := xmldom.appendChild(
item_node
, xmldom.makeNode(item_text)
-- Create user element: QUALITY_VALUE
item_elmt := xmldom.createElement(
doc
, 'QUALITY_VALUE'
item_node := xmldom.appendChild(
user_node
, xmldom.makeNode(item_elmt)
item_text := xmldom.createTextNode(
doc
, get_fingers_rec.quality_val
item_node := xmldom.appendChild(
item_node
, xmldom.makeNode(item_text)
END LOOP;
xmldom.writeToFile(
doc
, '/ec_' || p_Order_No || '.xml'
xmldom.freeDocument(doc);
END;
end generate_xml_order;
end cardsXml;
=======================================================================
Thanks,
Francois

Answer 1

Using theDOM seems like a difficult way to create XML from a table.
There are easier ways, e.g.
declare
theXML clob;
query varchar2(100);
id pls_integer := 3;
begin
query :='select run_id, tc_run_id,outcome_id, status from utr_outcome';
theXML := xmlgen.getXML(query);
printclobout(theXML);
end;
will produce
<?xml version = '1.0'?>
<ROWSET>
<ROW num="1">
<RUN_ID>1</RUN_ID>
<TC_RUN_ID>1</TC_RUN_ID>
<OUTCOME_ID>-1</OUTCOME_ID>
<STATUS>FAILURE</STATUS>
</ROW>
<ROW num="2">
<RUN_ID>1</RUN_ID>
<TC_RUN_ID>2</TC_RUN_ID>
<OUTCOME_ID>-2</OUTCOME_ID>
<STATUS>FAILURE</STATUS>
</ROW>
... etc.
If your query is more complicated, you can use inline cursors (performance problems if query run on client).
I recommend Steve Meunchs book, 'Building Oracle XML Applications'. Chapter 10 which covers 'automatic XML generation with DBXML' looks suitable.