postgresql7.1
select case when exists (select 1
from acs_object_types t
where t.supertype = :group_type)
then 1 else 0 end
select case when exists (select 1
from acs_rel_types t
where t.object_type_one = :group_type
or t.object_type_two = :group_type)
then 1 else 0 end