Hi Jason,

> > Who could explain in details, how the engine performs queries with ORDER
> > BY clause.
>
> I wish that I could but I don't feel qualified.
>
> The best place to find someone who will answer your question is on the
> IB-Architect@egroups.com list.

I was going to cross-post my question to the both lists, but forgot it :-(
Sending it to the Architect list at the moment.

Best regards,
Dmitry