| From: | Dmitry Dolgov <9erthalion6(at)gmail(dot)com> |
|---|---|
| To: | Pavel Borisov <pashkin(dot)elfe(at)gmail(dot)com> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Teodor Sigaev <teodor(at)sigaev(dot)ru>, Gavin Flower <GavinFlower(at)archidevsys(dot)co(dot)nz>, Andres Freund <andres(at)anarazel(dot)de>, Michael Paquier <michael(at)paquier(dot)xyz>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: POC: GROUP BY optimization |
| Date: | 2020-10-26 08:57:21 |
| Message-ID: | 20201026085721.g6h5xljxvodnmk34@localhost |
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| Thread: | |
| Lists: | pgsql-hackers |
> On Mon, Oct 26, 2020 at 12:44:58PM +0400, Pavel Borisov wrote:
> >
> >
> > I wonder if anyone has plans to try again with this optimization in v14
> > cycle? The patches no longer apply thanks to the incremental sort patch,
> > but I suppose fixing that should not be extremely hard.
> >
> > I found this feature interesting and I'd like to join.
> PFA the updated version of the patch made fully compatible with changes in
> v13 and I suppose it is ready to be reviewed for v14.
>
> Main things changed:
> 1. Patch is made compatible with new lists representation ( 1cff1b95ab6d )
> 2. Patch is made compatible with the incremental sort ( d2d8a229bc58 and
> ba3e76cc571e )
> 3. Tests are changed to represent changes in keys numbering and
> naming convention in the plan ( 55a1954da16 and 6ef77cf46e8 )
>
> As always your ideas are very much welcome!
Hi,
Thanks for your interest! FYI there is a new thread about this topic [1]
with the next version of the patch and more commentaries (I've created
it for visibility purposes, but probably it also created some confusion,
sorry for that).
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