On Mon, 31 Mar 2003, Tom Lane wrote:
> I said:
> > PG 7.4 will be better prepared to handle this sort of query, but I don't
> > think it will realize that the T1/T2 left join could be reduced to a
> > plain join given these conditions
>
> I take that back --- actually, the algorithm used in CVS tip *does*
> deduce that all these left joins can be plain joins.
>
> Don't suppose you'd like to experiment with a current snapshot to see
> how well it does for you?
Think we can get the authors of the case tool that started this to include
it? :-)