Query against an interface

Hi list,
I have a question regarding queries against an interface.
In=20
my application I have an interface with 2 subclasses. The interface has=20
a "description" field.

=09/*
=09 * @ojb.field name=3D"description"
=09 * =09jdbc-
type=3D"VARCHAR"
=09 * =09length=3D"300"
=09 */
=09public String getDescription();



When I build a query and I order it by description, all is fine if the=20
query is against a single subclass.
If the query is against the=20
interface, I have these results:
- first subclass results ordered by=20
description, then
- second subclass results ordered by description

Is=20
there a way to have all results ordered by description, and not each=20
subclass results ordered by description?
Any hint would be greatly=20
appreciated.
Thanks in advance and best regards,
Marco


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