Robert,
>> Yeah, I can generate one pretty easily; the behavior is readily
>> observable and repeatable. Will get on it RSN, but at you said, we're
>> not doing anything about it for 9.0.
Well, I can generate a test case, but on examination it turns out to be
nothing to do with partitioning; it's just good old "n-distinct
underestimation", and not really related to partitioning or joins.
--Josh Berkus