FROM forum_boards fb NATURAL JOIN forum_threads ft
JOIN forum_posts fp USING (ftid) LEFT OUTER JOIN
(SELECT * FROM forum_thread_visits WHERE uid = $1) ftv ON ftv.ftid = ft.ftid
FROM forum_boards fb NATURAL JOIN forum_threads ft
JOIN forum_posts fp USING (ftid) LEFT OUTER JOIN
(SELECT * FROM forum_thread_visits WHERE uid = $1) ftv ON ftv.ftid = ft.ftid