Обсуждение: Time zone string not showing

Hi all,

I want to have the time zone string (like 'BRT') displayed after a
date-time. The date column is of the type timestamp with time zone. But
the time zone is not displayed.

It works for a timestamp without time zone column:
# select to_char(timestamp '2001-02-16 20:38:40' at time zone 'BRT',
'HH24:MI DD/MM/YYYY TZ');
       to_char
----------------------
 23:38 16/02/2001 UTC

It does not work for a timestamp with time zone column:
# select to_char(timestamp with time zone '2001-02-16 20:38:40-05' at
time zone 'BRT', 'HH24:MI DD/MM/YYYY TZ');
      to_char
-------------------
 22:38 16/02/2001

Is it the expected behavior? Should I just append the time zone
string? The problem is it could be 'BRT' or 'BRST' depending on the
date.

Regards,
Clodoaldo Pinto





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=?iso-8859-1?q?Clodoaldo=20Pinto=20Neto?= <clodoaldo_pinto@yahoo.com.br> writes:
> It does not work for a timestamp with time zone column:
> # select to_char(timestamp with time zone '2001-02-16 20:38:40-05' at
> time zone 'BRT', 'HH24:MI DD/MM/YYYY TZ');
>       to_char
> -------------------
>  22:38 16/02/2001

> Is it the expected behavior?

Yes.  AT TIME ZONE converts a timestamp without time zone to a timestamp
with time zone, or vice versa.

            regards, tom lane