On 25/02/15 00:42, Peter Geoghegan wrote: > On Tue, Feb 24, 2015 at 4:32 PM, Jeremy Harris <j...@wizmail.org> wrote: >> On 23/02/15 16:40, Tomas Vondra wrote: >>> On 22.2.2015 22:30, Peter Geoghegan wrote: >>>> You should try it with the data fully sorted like this, but with one >>>> tiny difference: The very last tuple is out of order. How does that >>>> look? >> >> If this case is actually important, a merge-sort can take >> significant advantage of the partial order: > >> test=# set enable_intmerge_sort to on; > > What is this?
Associated with an implementation of an internal merge sort, a control to disable it. Not in the mainline sourcebase. -- Cheers, Jeremy -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers