Typo in online docs

On this page:
http://www.postgresql.org/docs/8.4/interactive/explicit-locking.html

This chapter:
13.3.4. Advisory Locks

This example:
SELECT pg_advisory_lock(id) FROM foo WHERE id = 12345; -- ok
SELECT pg_advisory_lock(id) FROM foo WHERE id > 12345 LIMIT 100; -- danger!
SELECT pg_advisory_lock(q.id) FROM
(
SELECT id FROM foo WHERE id > 12345 LIMIT 100;
) q; -- ok

Last statement seems bogus to me ...

--strk;

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