I wrote: > On a longer-term basis, I'm looking into what we could do with > extracting stats from subqueries, but that doesn't seem like material > for a backpatch. I have a draft patch that I've been playing with > (attached).
I've committed a heavily rewritten version of that patch. Git HEAD seems to do reasonably well on the test case you gave at the start of this thread. I'm not sure yet how well the logic will hold up in real-world queries as opposed to simplified test cases, but give it a try. regards, tom lane -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers