postgresql7.2 update forums_messages set reply_count = reply_count + 1, approved_reply_count = approved_reply_count + 1, max_child_sortkey = tree_increment_key(max_child_sortkey) where message_id = :message_id select message_id as msge_id, substring(tree_sortkey, 9, length(tree_sortkey)) as child_tree_sortkey from forums_messages where forum_id = $message(forum_id) and tree_sortkey between tree_left('$message(tree_sortkey)') and tree_right('$message(tree_sortkey)') order by tree_sortkey desc update forums_messages set last_child_post = (select max(last_child_post) from forums_messages where forum_id = :forum_id and tree_sortkey between tree_left((select tree_sortkey from forums_messages where message_id = :message_id)) and tree_right((select tree_sortkey from forums_messages where message_id = :message_id))) where message_id = :message_id