"Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes:
> Craig Ringer <craig@postnewspapers.com.au> wrote:
>> Doesn't the planner have some ... issues ... with estimation of
>> row counts on joins over unions? Or is my memory just more faulty
>> than usual?
> So far I can't tell if it's views with unions or (as I suspect)
> inheritance.
As of recent versions there shouldn't be a lot of difference between
inheritance and UNION ALL subqueries --- they're both "appendrels"
to the planner. And yeah, I think the statistical support is pretty
crummy.
regards, tom lane
