| From: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru> |
|---|---|
| To: | Andrey Borodin <x4mmm(at)yandex-team(dot)ru> |
| Cc: | Nikita Glukhov <n(dot)gluhov(at)postgrespro(dot)ru>, David Steele <david(at)pgmasters(dot)net>, Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] [PATCH] kNN for SP-GiST |
| Date: | 2018-08-28 09:50:49 |
| Message-ID: | CAPpHfdstcdyKr49qvLkVmcAd_GyKB-Umk+Qx6-g5Ni_fB8w1mA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jul 26, 2018 at 8:39 PM Andrey Borodin <x4mmm(at)yandex-team(dot)ru> wrote:
> I'm not sure in architectural point of view: supporting two ways (list and heap) to store result seems may be a bit heavy, but OK. At least, it has meaningful benefits.
It seems that Nikita have reworked it that way after my suspect that
switching regular scans to pairing heap *might* cause a regression.
However, I didn't insist that we need to support two ways. For
instance, if we can prove that there is no regression then it's fine
to use just heap...
------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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