Schema Based XML View Question

Question

Hi,
Is there a way to use the OBJECT ID value in the view's WHERE clause?
For example:
create or replace view xml_view of XMLTYPE
XMLSCHEMA "http://yo.orf/sample.xsd" ELEMENT "el"
WITH OBJECT ID ( extract('/el/@id').getNumberVal())
FROM columns( l.id)
AS
SELECT XMLElement( "el", ....)
FROM liner_tbl l
WHERE l.id = ?? extracted object id value ??
Can I replace ?? extracted object id value ?? with a some sort of xmldata qualifier?
Ciao
Stefano

Answer 1

Mark,
Basically we have an XML view that generates undesirable query execution plans for queries on the object id:
select value(x) from xml_view x
where existsNode( value(x), '/el[@id="4"') = 1;
Whereas if I just take the query statement that defines the view alone, and add to it a simple where clause with the value of the object id, the execution plans it generates become optimal.
select XMLElement( ...)
from liner_tbl l
where l.id = 4;
Ciao
Stefano