postgresql7.1 select b.bookmark_id, b.url_id, b.local_title, last_live_date, last_checked_date, b.parent_id, complete_url, b.folder_p, tree_level(b.tree_sortkey) as lev from ( select bm.bookmark_id, bm.url_id, bm.local_title, bm.folder_p, bm.parent_id, bm.owner_id, bm.tree_sortkey from bm_bookmarks bm, bm_bookmarks bm2 where bm.tree_sortkey between bm2.tree_sortkey and tree_right(bm2.tree_sortkey) and bm2.bookmark_id = :root_id ) b left join bm_urls using (url_id) where b.bookmark_id <> :root_id and acs_permission__permission_p(b.bookmark_id, :user_id, 'read') order by b.tree_sortkey