A joined inheritance mapper is mapped to a join();
these have no .info attribute, so use that
of the local table instead. The sorting order when
querying against a joined subclass table
can at least be derived from the base table, so
use the base mapper's table. It may be a better idea
to comprise the constraints amongst the base table
*and* the joined table, though.
Change-Id: I9466c9dbbbdc4af10ab0f15ee0f558199973c1ec
(cherry picked from commit b19738a13a)
13223e459b