If I modify an existing table from timestamp to timestamptz, will it use the current system timezone? If so, how can I modify all the rows to convert to UTC time (basically add 8 hrs to everything)..
On Mon, Jun 15, 2009 at 6:52 PM, Bruce Momjian <bruce@xxxxxxxxxx> wrote:
Mike Christensen wrote:I don't think there is any measurable difference in the two data types,
> Hi all -
>
> I'm considering changing all my "timestamp" columns to "timestamp with
> timezone" columns instead. The reason is I want to use UTC time for
> everything in the DB and on the web server, and only ever convert to local
> time on the client itself. I could use a timestamp and just "know" that the
> timezone is UTC, but npgsql seems to handle this a lot better (like set the
> "Kind" property to UTC, etc) if you have a timestamptz column type.
>
> I'm curious if there's any perf drawbacks to doing this, or would the only
> perf hit be if I were comparing timestamp with timestamptz and doing all
> sorts of casts and stuff. Thanks!
and timestamptz is usually superior, as you have found.
--
Bruce Momjian <bruce@xxxxxxxxxx> http://momjian.us
EnterpriseDB http://enterprisedb.com
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