Re: BUG #6340: to_timestamp() miscalculates

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От Robert Haas
Тема Re: BUG #6340: to_timestamp() miscalculates
Дата
Msg-id CA+TgmoafHC-qikDq0LFxXKbtNEPGeA0Rq=9P=u8KjtmpWjNE5w@mail.gmail.com
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Ответ на Re: BUG #6340: to_timestamp() miscalculates  (Hans-Henrik Fuxelius <hfuxelius@gmail.com>)
Список pgsql-bugs
On Fri, Dec 16, 2011 at 3:43 AM, Hans-Henrik Fuxelius
<hfuxelius@gmail.com> wrote:
> It seems not possible to suppress to_timestamp from doing daylight
> saving conversion, I have GPS timeseries that looks perfect in the
> 'timestamp without time zone' save one value that wreck the whole time
> serie, does that mean that time series cant be stored in time stamps?

I think it mostly means that you shouldn't use timestamp without time zone.

Or else you should use a time zone setting that doesn't involve DST.

Throwing away the time zone information is bad, because YYYY-MM-DD
HH:MM:SS doesn't uniquely identify a point in time, even if you know
what time zone it's relative to.  That combination of years, minutes,
days, hours, minutes, and seconds can occur twice, if it's near a DST
boundary.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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