Tom Lane schrieb am 14.11.2017 um 15:36:
>> is there any way (short of writing a function in an untrusted PL)
>> to determine the actual time zone (or time) of the server OS?
> AFAIK that would only be true if some part of your client stack
> is issuing a SET TIMEZONE command. (libpq will do that if it finds
> a PGTZ environment variable set, but not in response to plain TZ.)
Ah, interesting. I do that through JDBC, so apparently that's the part to blame.
> If that's true, and you can't/don't want to change it, you could try
> select reset_val from pg_settings where name = 'TimeZone';
Hmm, this does not seem to work.
I am connected to a server with Asia/Bangkok but through JDBC
that query still returns Europe/Berlin (which is my client's time zone)
So apparently the JDBC driver somehow "persists" this setting.
I will take this to the JDBC mailing list then, thanks.