I'm guessing it's this... looks pretty interesting even if not. http://optimizermagic.blogspot.com/2008/06/why-are-some-of-tables-in-my-query.html
...Robert -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers