postgresql9.0
select c.constraint_id, c.constraint_name
from rel_constraints c
application_group_segments s1, application_group_segments s2
where s1.segment_id = c.rel_segment
and s1.package_id = :package_id
and s2.segment_id = c.required_rel_segment
and s2.package_id = :package_id
and acs_permission__permission_p(c.constraint_id, :user_id, 'read')
order by lower(c.constraint_name)