Forum OpenACS Development: application_groups

I've seen that there is a table called application_groups in acs_subsite, the idea is cool, but it doesn't run in my openacs instance. I've written a view called package_group_map that seems run:

CREATE VIEW package_group_map AS
SELECT ao_group.object_id AS group_id, ao_application.package_id
   FROM dotlrn_communities_all dca, acs_objects ao_application, acs_objects ao_group
  WHERE ao_application.context_id = dca.package_id AND dca.community_id = ao_group.object_id;

I think that would be interesting to be able to recover the group_id from the package_id in a more declarative way than doing this sql query. Perhaps this view may be useful to someone.

Regards!