Re: Incorrect result of bitmap heap scan.

Matthias van de Meent <boekewurm+postgres@gmail.com>

From: Matthias van de Meent <boekewurm+postgres@gmail.com>

To: Andres Freund <andres@anarazel.de>

Cc: vignesh C <vignesh21@gmail.com>, Peter Geoghegan <pg@bowt.ie>, Tom Lane <tgl@sss.pgh.pa.us>, Andrew Dunstan <andrew@dunslane.net>, Melanie Plageman <melanieplageman@gmail.com>, Thomas Munro <thomas.munro@gmail.com>, Konstantin Knizhnik <knizhnik@garret.ru>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>, Alexander Kuzmenkov <akuzmenkov@timescale.com>

Date: 2025-04-02T16:58:11Z

Lists: pgsql-hackers

Attachments

v6-0002-isolationtester-showing-broken-index-only-bitmap-.patch (application/octet-stream) patch v6-0002
v6-0001-Remove-HeapBitmapScan-s-skip_fetch-optimization.patch (application/octet-stream) patch v6-0001

On Wed, 2 Apr 2025 at 18:20, Matthias van de Meent
<boekewurm+postgres@gmail.com> wrote:
>
> On Wed, 2 Apr 2025 at 17:37, Andres Freund <andres@anarazel.de> wrote:
> >
> > Hi,
> >
> > Matthias, any chance you can provide a rebased version for master?
>
> Sure, I'll try to have it in your inbox later today CEST.

And here it is, v6 of the patchset, rebased up to master @ 764d501d.

Kind regards,

Matthias van de Meent
Neon (https://neon.tech)

Commits

Add test for HeapBitmapScan's broken skip_fetch optimization
- 24da5b239a4b 18.0 landed
Remove HeapBitmapScan's skip_fetch optimization
- 459e7bf8e2f8 18.0 landed
- b9ec8125d167 13.21 landed
- 4934d38759cd 14.18 landed
- 77d90d6d6334 15.13 landed
- 980727b84107 16.9 landed
- 78cb2466f752 17.5 landed
Allow bitmap scans to operate as index-only scans when possible.
- 7c70996ebf09 11.0 cited