Re: function to get GMT time

Terry,
You're missing the point. There's no built-in knowledge in this function to determine WHEN to switch from the "S" to the "D". If you're interactively doing this and you know you are now on DST, then this will work fine. However, if you're doing this inside a program, there is no method to automatically determine whether the source or target has now switched to DST. Plus, the time of the switch will vary from year to year. So, you will need to build a table to store this switchover points, by country (not timezone as switchover times vary within timezones -- and some countries do not have DST) and by year.

The NEW_TIME is just a simplistic function that subtracts or adds hours. Also, there's a very limited number of timezones supported (mainly US plus GMT). Marc Perkowitz

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Tuesday, April 03, 2001 4:23 PM

> But all you need to do is substitute the S for a D in the local time.
> select sysdate, new_time(sysdate,'MDT','GMT') from dual;
>
> The D already converts to DST for you.
>
> Terry
>
> Marc Perkowitz wrote:
>
> > Just keep in mind, as I mentioned earlier, DST is not accounted for. So
you
> > will first need to convert from EDT to EST and then use this function.
> > Otherwise your GMT will be one hour off. Of course, if you run your
machine
> > on EST and do not switch to EDT, you will be fine.
> >
> > Oh, I've assuming you really mean Universal Time (UT) when you're saying
> > GMT. If you actually mean the local time for the UK, then you'll need
to
> > take their summer time change into effect also. Their summer time took
> > effect on March 25th this year, while US DST took effect on April 1st.
So,
> > for one week the time difference was less than usual, but now the
difference
> > is consistent.
> >
> > Marc Perkowitz
> > Senior Consultant
> > TWJ Consulting, LLP
> >
> > 847-256-8866 x15
> > www.twjconsulting.com
> >
> > ----- Original Message -----
> > To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> > Sent: Tuesday, April 03, 2001 1:19 PM
> >
> > > This gives GMT. Thanks! Ruth
> > > ----- Original Message -----
> > > To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> > > Sent: Tuesday, April 03, 2001 1:15 PM
> > >
> > >
> > > > Hi Andreas,
> > > >
> > > > Please try this.
> > > >
> > > > select sysdate, new_time(sysdate,'EST','GMT') from dual;
> > > >
> > > > Thanks,
> > > > Gurdarshan
> > > >
> > > >
> > > > -----Original Message-----
> > > > [mailto:Andreas.Haunschmidt_at_voest.co.at]
> > > > Sent: Tuesday, April 03, 2001 11:45 AM
> > > > To: Multiple recipients of list ORACLE-L
> > > >
> > > >
> > > > Hi !
> > > >
> > > > Is there a way to get GMT time within PL/SQL independent from
> > > > the local time(zone), I'm looking for a function similar to SYSDATE,
> > > > but it should return GMT instead of the local time.
> > > >
> > > >
> > > > TIA
> > > >
> > > > Andreas
> > > > --
> > > > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > > > --
> > > > Author: Haunschmidt Andreas VASL/FAS
> > > > INET: Andreas.Haunschmidt_at_voest.co.at
> > > >
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> > > > Author: Singh, Gurdarshan (Gurdarshan)** CTR **
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> --
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> Author: Terry Ball
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Marc Perkowitz
  INET: mperkowitz_at_twjconsulting.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
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