Re: using 'zoneinfo' to manipulate dates ...

On Sun, Jun 26, 2005 at 12:24:53AM -0300, Marc G. Fournier wrote:
>
> Does anyone have a 'table of timezones' that could be used to "localize"
> as part of a query?
>
> For instance, something like:
>
> SELECT date
> FROM table
> WHERE ( time || ' ' || ( SELECT timezone
> FROM zones
> WHERE id = table.timezone )) = '2004-12-12';

You can do this very easily in CVS tip. I assume you want something like
this:

alvherre=# show timezone;
TimeZone
------------------
America/Santiago
(1 fila)

alvherre=# select '00:00:00 GMT'::timetz at time zone 'Chile/EasterIsland';
timezone
-------------
18:00:00-06
(1 fila)

alvherre=# select '00:00:00 GMT'::timetz at time zone 'Chile/Continental';
timezone
-------------
20:00:00-04
(1 fila)

Not sure if that helps you any. I think you could build a table using
this and the fact that "postmaster -d3" prints the whole table of known
timezones. (You could extract that bit from the zic files as well.)

--
Alvaro Herrera (<alvherre[a]surnet.cl>)
"Hay quien adquiere la mala costumbre de ser infeliz" (M. A. Evans)