| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | dsuchka(at)gmail(dot)com |
| Cc: | pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #14972: row duplicate on first SELECT from CTE (by JOIN/FOR UPDATE) from which UPDATE performed recently |
| Date: | 2017-12-13 20:14:52 |
| Message-ID: | CAKFQuwb2OAyOsE3m5dZT5DXz-rYF9Jj4wY5juSRHFJGdoNuyzQ@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Wed, Dec 13, 2017 at 12:12 PM, <dsuchka(at)gmail(dot)com> wrote:
> The following bug has been logged on the website:
>
> Bug reference: 14972
> Logged by: Evgeniy Kozlov
> Email address: dsuchka(at)gmail(dot)com
> PostgreSQL version: 9.5.5
> Operating system: gentoo, debian
> Description:
>
> Since ON CONFLICT does not work with partitions, I have designed an
> aggregation appender by hand using UPDATE (for existed rows) + INSERT (for
> new ones). Unexpectedly I got a strange result as a count of updated
> (really
> joined) rows running that function cuncurrently on 9.5.5 and 9.5.7 (9.5.2
> works correctly).
> The got value exceeds the expected result by 1
>
Can you run this against 9.5.10 and see if it is still a problem? Its
seems the last couple of bug fix patches covered something that sounds
familiar.
David J.
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