Greg Stark <gsstark@mit.edu> writes:
> Richard Huxton <dev@archonet.com> writes:
>> If I join two tables with a comparison to a constant on one, why can't the
>> planner see that the comparison applies to both tables:
> It sure does. Postgres does an impressive job of tracing equality clauses
> around for just this purpose.
CVS tip does. Existing releases don't...
regards, tom lane