Pipelined function which creates xml nodes,items and elements

Question

Hi Everyone,
I am Vikas Kumar and i have written a pipelined function
which is returning a UDT which i have created in my database.
but when i am piping a row then there is error :
"Error: PLS-00306: wrong number or types of arguments in call to 'CLASEC_MENU_TYPE' "
i have created UDT as :
create type clasec_menu_type as object (menu_data xmltype);
create type clasec_menu_list_type as table of clasec_menu_type;
and function is as below
create or replace function clasec_fns_menu
return clasec_menu_list_type pipelined as
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_menu IS
SELECT menu_level,
is_menu_a_leaf,
menu_id,
menu_name,
menu_screen_uri,
screen_target_frame,
rownum
FROM clasec_menu_view1;
BEGIN
doc := xmldom.newDOMDocument;
main_node := xmldom.makeNode(doc);
root_elmt := xmldom.createElement(
doc,
'Menubar'
root_node := xmldom.appendChild(
main_node,
xmldom.makeNode(root_elmt)
pipe row (clasec_menu_type(root_node));
FOR get_menu_rec IN get_menu LOOP
if get_menu_rec.menu_level = 1 then
item_elmt := xmldom.createElement(
doc,
'menu'
xmldom.setAttribute(
item_elmt,
'text',
get_menu_rec.menu_name
user_node := xmldom.appendChild(
root_node,
xmldom.makeNode(item_elmt)
pipe row(user_node);
end loop;
end;
compilation error is at the statement
pipe row (clasec_menu_type(root_node));
i think its conversion error but don,t know how can i convert root_node which has been defined with :
root_node xmldom.DOMNode;
Regards,
Vikas Kumar

Answer 1

Hi,
Your type, clasec_menu_type, needs an argument of type XMLType. If you want to create instance of XMLType, you have to pass it varchar2, clob or XMLType.
So, think how will you convert xmldom.DOMNode to XMLtype or Varchar2 or clob.
Best of luck