[EMAIL PROTECTED] writes:
> I am hoping that there is a simple omission that keeps the optimizer
> from using the transitive literal.

PG doesn't compute transitive equality of literals, and never has AFAIK
(certainly 7.0.* didn't).  I'm not sure what's causing the change in
behavior from 7.0 to 7.1, but your theory about it is wrong.  Could you
make up a self-contained example?

                        regards, tom lane

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