Re: On login trigger: take three

From: Daniel Gustafsson <daniel(at)yesql(dot)se>
To: "Gregory Stark (as CFM)" <stark(dot)cfm(at)gmail(dot)com>
Cc: Mikhail Gribkov <youzhick(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Ted Yu <yuzhihong(at)gmail(dot)com>, Nikita Malakhov <hukutoc(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Ian Lawrence Barwick <barwick(at)gmail(dot)com>, Sergey Shinderuk <s(dot)shinderuk(at)postgrespro(dot)ru>, Ivan Panchenko <wao(at)mail(dot)ru>, Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Greg Nancarrow <gregn4422(at)gmail(dot)com>, Teodor Sigaev <teodor(at)sigaev(dot)ru>, Ibrar Ahmed <ibrar(dot)ahmad(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>
Subject: Re: On login trigger: take three
Date: 2023-03-06 21:24:30
Message-ID: 72605E86-2C65-4391-9F2B-0115EE4226F0@yesql.se
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> On 6 Mar 2023, at 21:55, Gregory Stark (as CFM) <stark(dot)cfm(at)gmail(dot)com> wrote:
>
> It looks like Daniel Gustafsson, Andres, and Tom have all weighed in
> on this patch with at least a neutral comment (+-0 from Andres :)

I think the concept of a login event trigger has merits, even though it's kind
of a niche use case.

> It looks like the main concern was breaking physical replicas and that
> there was consensus that as long as single-user mode worked that it
> was ok?

Having a way to not rely on single-user mode and not causing an unacceptable
performance hit (which judging by recent benchmarks might not be an issue?). I
still intend to revisit this and I hope to get to it during this CF.

--
Daniel Gustafsson

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