| Wed, 07 Jan 2009 14:55:16 +0100 | Sylvain Thenault | consider intersect *and* distinct | changeset | files |
| Wed, 07 Jan 2009 09:47:56 +0100 | Sylvain Thenault | in some cases (eg ambiguous neged relations), INTERSECT should be used instead of DISTINCT | changeset | files |