postgresql7.1 select acs_rel_type__drop_type(:rel_type,'t') drop table $table_name select r.rel_id from acs_rels r where acs_permission__permission_p(r.rel_id, :user_id, 'delete') and r.rel_type = :rel_type select s.segment_id from rel_segments s where acs_permission__permission_p(s.segment_id, :user_id, 'delete') and s.rel_type = :rel_type