postgresql7.1 select case when count(*) = 0 then 0 else 1 end from apm_packages p, site_nodes s where package_id = :package_id and p.package_id = s.object_id select apm_package__delete(:package_id) select case when count(*) = 0 then 0 else 1 end from apm_packages where package_id = :package_id