postgresql7.1 select t2.pretty_name, t2.object_type as rel_type, repeat(' ', (tree_level(t2.tree_sortkey) - tree_level(t1.tree_sortkey)) * 4) as indent from acs_object_types t1, acs_object_types t2, rel_segments s where t2.tree_sortkey between t1.tree_sortkey and tree_right(t1.tree_sortkey) and t1.object_type in ('membership_rel', 'composition_rel') and t2.object_type <> s.rel_type and s.group_id = :group_id order by lower(t2.pretty_name) desc