postgresql7.1 select p.public_p, p.pres_title as presentation_title, acs_permission__permission_p(:pres_item_id, :user_id, 'wp_admin_presentation') as admin_p, acs_permission__permission_p(:pres_item_id, :user_id, 'wp_delete_presentation') as delete_p, ao.creation_user, p.show_comments_p, p.presentation_id from cr_wp_presentations p, cr_items i, acs_objects ao where i.item_id = :pres_item_id and i.live_revision = p.presentation_id and ao.object_id = :pres_item_id select distinct on (p.person_id) p.person_id, p.first_names || ' ' || p.last_name as full_name, perm.privilege from persons p, acs_permissions perm where perm.object_id = :pres_item_id and perm.grantee_id = p.person_id and (perm.privilege = 'wp_view_presentation' or perm.privilege = 'wp_edit_presentation' or perm.privilege = 'wp_admin_presentation' ) order by p.person_id, perm.privilege ASC