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List:       postgresql-general
Subject:    Re: [GENERAL] Retrieve the server's time zone
From:       Thomas Kellerer <spam_eater () gmx ! net>
Date:       2017-11-14 14:49:58
Message-ID: ouevqe$3el$1 () blaine ! gmane ! org
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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.

Thomas



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