Re: PoC: Partial sort
| От | Marti Raudsepp |
|---|---|
| Тема | Re: PoC: Partial sort |
| Дата | |
| Msg-id | CABRT9RDva32yHfar3iEHYuji2zyi-nAnTam4FAmxzoQGS83hgg@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: PoC: Partial sort (Jeremy Harris <jgh@wizmail.org>) |
| Список | pgsql-hackers |
Funny, I just wrote a patch to do that some minutes ago (didn't see your email yet).
http://www.postgresql.org/message-id/CABRT9RCK=wmFUYZdqU_+MOFW5PDevLxJmZ5B=eTJJNUBvyARxw@mail.gmail.com
Regards,http://www.postgresql.org/message-id/CABRT9RCK=wmFUYZdqU_+MOFW5PDevLxJmZ5B=eTJJNUBvyARxw@mail.gmail.com
Marti
On Sat, Jan 18, 2014 at 7:10 PM, Jeremy Harris <jgh@wizmail.org> wrote:
On 13/01/14 18:01, Alexander Korotkov wrote:Would it be possible to totally separate the two sets of sort-keys,Thanks. It's included into attached version of patch. As wall as estimation
improvements, more comments and regression tests fix.
only giving the non-index set to the tuplesort? At present tuplesort
will, when it has a group to sort, make wasted compares on the
indexed set of keys before starting on the non-indexed set.
--
Cheers,
Jeremy
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