oracle 8.1.6 select site_node.url(node_id) as url, acs_object.name(object_id) as name from site_nodes where parent_id = site_node.node_id('/') and object_id is not null and acs_permission.permission_p( object_id, nvl(:user_id, acs.magic_object_id('the_public')), 'read') = 't'