Re: [PG19] eager aggregation gives wrong results because of bpchar_ops

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Peter Geoghegan <pg(at)bowt(dot)ie>
Cc: shihao zhong <zhong950419(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Guofenglinux <guofenglinux(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>
Subject: Re: [PG19] eager aggregation gives wrong results because of bpchar_ops
Date: 2026-10-07 00:40:56
Message-ID: 1873963.1791333656@sss.pgh.pa.us
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Peter Geoghegan <pg(at)bowt(dot)ie> writes:
> On Tue, Oct 6, 2026 at 7:49 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> I'm about to go to dinner, but I can work on fixing this afterwards
>> if you don't want to.

> I'll see where I get with following this precedent now.

If you like, but my experience is that getting this right is pretty
painful if you don't have a cross-version-upgrade-testing BF animal
to experiment on. I do ...

regards, tom lane

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