http://developer.postgresql.org/pgdocs/postgres/release-9-0.html
Performance section: > Simplify the forms foo <> true and foo <> false to foo = false and > foo = true during query optimization. Will it work correct;ly when foo is NULL? -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
