I am sorry to hear that PostgreSQL is not supported. We did a project
with MySQL because it was "free" and then found out it is not free to
commercial organziations like ours. Now we pay a licensing fee and
carefully track assignement of licenses, which is another cost.
PostgreSQL is truly free. It also seems to be far more robust and
reliable than MySQL. We love Eclipse, so its lack of support here is
unfortunate and will probably force us to use Hibernate.
I would like to urge Eclipse's JSR220-ORM planners to include PostgreSQL
in their plans and let everyone know.