On 09/12/15 00:02, Jeff Janes wrote: > The second one consumes that giant tape run along with 232 small tape > runs.
In terms of number of comparisons, binary merge works best when the inputs are of similar length. I'd assume the same goes for n-ary merge, but I don't know if comparison count is an issue here. -- Cheers, Jeremy -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
