On Thu, May 28, 2015 at 11:06 AM, Jason Greene <jason.greene@redhat.com> wrote:

Does 5 have significant TCK impacting changes? I heard there was work on a new query engine, but don’t remember if that was for 5 or the future.

There *should not* be.  Of course, proof in always in the pudding :) 

The new query engine (its actually more ambitious than "just" the query engine) is a future roadmap item.