[gnome-db] Providers state

Is there some table which lists status of different providers?

I ask because I tried to use Postgres provider as backend for Midgard
content repository, today and bumped into limitation:
_gda_postgres_meta__enums is not implemented

Would be good to know what to expect in advance

-- 
Alexey Zakhlestin, http://twitter.com/jimi_dini
http://www.milkfarmsoft.com/