Wed, 07 Jan 2009 14:57:03 +0100 Sylvain Thenault fixes for some cases of neged inlined relations, may have to use (new) IntersectStep. XXX: write IntersectFetchStep
Wed, 07 Jan 2009 14:55:16 +0100 Sylvain Thenault consider intersect *and* distinct
Wed, 07 Jan 2009 09:47:56 +0100 Sylvain Thenault in some cases (eg ambiguous neged relations), INTERSECT should be used instead of DISTINCT
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