Jeff Davis <pg...@j-davis.com> writes: > Yes, I have run into this issue (or something very similar). I don't > understand why the bucketsize even matters much -- assuming few hash > collisions, we are not actually evaluating the quals any more times than > necessary. So why all of the hashjoin-specific logic in determining the > number of qual evaluations? The only reason I can think of is to model > the cost of comparing the hashes themselves.
I think the point is that there may *not* be few hash collisions ... 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