From: | David Rowley <dgrowleyml(at)gmail(dot)com> |
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To: | Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: Numeric multiplication overflow errors |
Date: | 2021-07-01 10:44:46 |
Message-ID: | CAApHDvpHvR6GPDjDRCsRzAPmTN6ihc3-SqyBA7Ga3OiW7pNbrg@mail.gmail.com |
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Lists: | pgsql-hackers |
On Thu, 1 Jul 2021 at 22:03, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> wrote:
> One other thing I'm wondering about is back-patching. I was originally
> thinking of these as back-patchable bug fixes, but changing the binary
> format of the aggregate serialization states feels dodgy for a
> back-patch.
I was wondering about that too. I'm not sure if any extensions might
be using serial/deserial functions to communicate over multiple
servers. As far as I know, Citus does not do this and implements
aggregates like AVG(c) over multi-nodes with SUM(c) + COUNT(c). I'm
pretty sure Citus is not the only extension doing that kind of work.
So perhaps other people are using the serial/deserial functions.
David
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