How to convert Oracle Collection(Objects) to XML dynamically?

Question

Dear members,
As a requirement I need to pass the collection of values(typically a object or a table type) to a procedure and generate a XML file on the fly basing on these collection values.I am not sure how to do it.Can anyone please guide me on that?
Thanks

Answer 1

Hi,
depending on how often/how complex the programming job is:
--- complex Xml structure, lots of changes: Have a look at [Oracle XML DB Developers Guide|http://download-west.oracle.com/docs/cd/B28359_01/appdev.111/b28369/toc.htm], chapter 3: Using Oracle XML DB
--- simple:
Here's a quick sample for generating Xml from SQL collection types. Works (at least) >= 10g.
create type xxp_foo_type as object (
a number
instantiable
create type xxp_foo_tab as table of xxp_foo_type
declare
v_table xxp_foo_tab := xxp_foo_tab();
v_xml xmltype;
begin
v_table.extend(2);
v_table(1) := xxp_foo_type( 1 );
v_table(2) := xxp_foo_type( 2 );
select xmlelement( "MyXml",
xmlagg(
xmlelement( "SomeValue", t.a )
into v_xml
from table( v_table ) t
dbms_output.put_line( v_xml.getStringVal() );
end;