oracle8.1.6
select replace(lpad(' ', (t.type_level - 1) * 4), ' ', ' ') as indent,
t.pretty_name, t.rel_type
from (select t.pretty_name, t.object_type as rel_type, level as type_level
from acs_object_types t
where t.object_type not in (select g.rel_type
from group_rels g
where g.group_id = :group_id)
connect by prior t.object_type = t.supertype
start with t.object_type in ('membership_rel', 'composition_rel')) t,
acs_rel_types rel_type
where t.rel_type = rel_type.rel_type
and (rel_type.object_type_one = :group_type
or acs_object_type.is_subtype_p(rel_type.object_type_one, :group_type) = 't')