postgresql7.1 SELECT fma.message_id FROM forums_messages_approved fma WHERE fma.forum_id = :forum_id and fma.tree_sortkey between (select fm.tree_sortkey from forums_messages fm where fm.message_id = :root_message_id) and (select tree_right(fm.tree_sortkey) from forums_messages fm where fm.message_id = :root_message_id) ORDER BY fma.message_id select message_id, 0 as n_attachments, t.subject, t.content, t.format, to_char(t.posting_date, 'YYYY-MM-DD HH24:MI:SS') as posting_date_ansi, tree_level(t.tree_sortkey) as tree_level, t.state, t.user_id, t.parent_id, t.open_p, t.max_child_sortkey from $table_name t where t.forum_id = :forum_id and t.tree_sortkey between tree_left(:tree_sortkey) and tree_right(:tree_sortkey) order by $order_by select message_id, (select count(*) from attachments where object_id = t.message_id) as n_attachments, t.subject, t.content, t.format, to_char(t.posting_date, 'YYYY-MM-DD HH24:MI:SS') as posting_date_ansi, tree_level(t.tree_sortkey) as tree_level, t.state, t.user_id, t.parent_id, t.open_p, t.max_child_sortkey from $table_name t where t.forum_id = :forum_id and t.tree_sortkey between tree_left(:tree_sortkey) and tree_right(:tree_sortkey) order by $order_by