| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Melanie Plageman <melanieplageman(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Konstantin Knizhnik <knizhnik(at)garret(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Alexander Kuzmenkov <akuzmenkov(at)timescale(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Subject: | Re: Incorrect result of bitmap heap scan. |
| Date: | 2024-12-02 20:56:17 |
| Message-ID: | CAH2-Wzm6gBqc99iEKO6540ynwpjOqWESt5yjg-bHbt0hc8DPsw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Dec 2, 2024 at 2:43 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> Attached is an isolationtest that reliably shows wrong query results.
Nice approach with the cursor!
I took what you wrote, and repurposed it to prove my old theory about
GiST index-only scans being broken due to the lack of an appropriate
interlock against concurrent TID recycling. See the attached patch.
--
Peter Geoghegan
| Attachment | Content-Type | Size |
|---|---|---|
| v1-0001-isolationtester-showing-broken-index-only-scans-w.patch | application/octet-stream | 3.9 KB |
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