From: | Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
---|---|
To: | Andres Freund <andres(at)anarazel(dot)de> |
Cc: | Pavel Borisov <pashkin(dot)elfe(at)gmail(dot)com>, Japin Li <japinli(at)hotmail(dot)com>, Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org |
Subject: | Re: Table AM Interface Enhancements |
Date: | 2024-04-07 23:25:17 |
Message-ID: | CAPpHfduoywCT5iBcmp3bXiRsNUuBnjAkDDCjhzo6rDvqfdgMHg@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Hi,
On Mon, Apr 8, 2024 at 12:40 AM Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2024-03-30 23:33:04 +0200, Alexander Korotkov wrote:
> > I've pushed 0001, 0002 and 0006.
>
> I briefly looked at 27bc1772fc81 and I don't think the state post this commit
> makes sense. Before this commit another block based AM could implement analyze
> without much code duplication. Now a large portion of analyze.c has to be
> copied, because they can't stop acquire_sample_rows() from calling
> heapam_scan_analyze_next_block().
>
> I'm quite certain this will break a few out-of-core AMs in a way that can't
> easily be fixed.
I was under the impression there are not so many out-of-core table
AMs, which have non-dummy analysis implementations. And even if there
are some, duplicating acquire_sample_rows() isn't a big deal.
But given your feedback, I'd like to propose to keep both options
open. Turn back the block-level API for analyze, but let table-AM
implement its own analyze function. Then existing out-of-core AMs
wouldn't need to do anything (or probably just set the new API method
to NULL).
> And even for non-block based AMs, the new interface basically requires
> reimplementing all of analyze.c.
.
Non-lock base AM needs to just provide an alternative implementation
for what acquire_sample_rows() does. This seems like reasonable
effort for me, and surely not reimplementing all of analyze.c.
------
Regards,
Alexander Korotkov
Attachment | Content-Type | Size |
---|---|---|
v1-0001-Turn-back-the-block-level-API-for-relation-analyz.patch | application/octet-stream | 14.2 KB |
From | Date | Subject | |
---|---|---|---|
Next Message | Andres Freund | 2024-04-07 23:26:35 | Re: meson: Specify -Wformat as a common warning flag for extensions |
Previous Message | Daniel Gustafsson | 2024-04-07 23:14:23 | Re: Add bump memory context type and use it for tuplesorts |