Thanks David,
The explanation of 'at time zone' explains what I'd missed there. Much appreciated!
From: David G. Johnston <david.g.johnston@gmail.com>
Sent: 31 May 2022 13:00
To: Gregory Jensen <GreatDJonfire@hotmail.co.uk>
Cc: pgsql-bugs@lists.postgresql.org <pgsql-bugs@lists.postgresql.org>
Subject: Re: Inconsistent time zone output for JSON at UTC
On Tuesday, May 31, 2022, Gregory Jensen <
GreatDJonfire@hotmail.co.uk> wrote:
When the server time zone setting is UTC - timezone = 'UTC'
select to_json(created_at::
timestamptz) from test_tz;
to_json
------------------------------------
"2022-05-31T10:20:07.133799+00:00"
(1 row)
This is the solution. The timezone setting isn't a “server setting”, it is a session-local setting with an initial value based upon server configuration. Change it for the session to UTC if you for some reason must output +00.
The at time zone operator outputs a timestamp without timezone and that is why those variants don’t produce any time zone offset.
David J.
