Groups > comp.databases.postgresql > #99

Re: timestamp and time zone

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From	"M. Strobel" <sorry_no_mail_here@nowhere.dee>
Newsgroups	comp.databases.postgresql
Subject	Re: timestamp and time zone
Date	Fri, 29 Apr 2011 12:23:13 +0200
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Am 29.04.2011 08:45, schrieb Harry Tuttle:
> M. Strobel, 28.04.2011 18:00:
>> I did not quite understand the use case of timestamp with time
>> zone.
>>
>> When do you need 'with time zone'? My tests show you can
>> calculate other time zones time easily from a timestamp without
>> time zone.
>>
>> Is timestamp internally stored normalized to utc, and calculated
>> to client time zone? Or to server time zone?
> 
> From the manual at:
> 
> http://www.postgresql.org/docs/current/static/datatype-datetime.html#DATATYPE-TIMEZONES
> 
> 
> All timezone-aware dates and times are stored internally in UTC.
> They are converted to local time in the zone specified by the
> timezone configuration parameter before being displayed to the
> client.
> 
> 

And I can _not_ conclude from this that a date/time without
timezone is not stored in utc, right?

The server clock is set to utc.

So where does the difference show up?

/Str.

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Thread

timestamp and time zone "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2011-04-28 18:00 +0200
  Re: timestamp and time zone Dog is love <michaelnewportyahoo.com@gmail.com> - 2011-04-28 10:05 -0700
    Re: timestamp and time zone "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2011-04-28 19:22 +0200
  Re: timestamp and time zone Harry Tuttle <OTPXDAJCSJVU@spammotel.com> - 2011-04-29 08:45 +0200
    Re: timestamp and time zone "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2011-04-29 12:23 +0200
      Re: timestamp and time zone D Yuniskis <not.going.to.be@seen.com> - 2011-04-29 06:02 -0700
  Re: timestamp and time zone Jasen Betts <jasen@xnet.co.nz> - 2011-04-30 11:15 +0000
    Re: timestamp and time zone Jasen Betts <jasen@xnet.co.nz> - 2011-04-30 11:26 +0000
    Re: timestamp and time zone "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2011-04-30 17:58 +0200
      Re: timestamp and time zone Jasen Betts <jasen@xnet.co.nz> - 2011-05-01 11:33 +0000

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