Re: Time zone offset in to_char()

On 1/12/24 02:01, Alban Hertroijs wrote:

> ciscache=> select ToDatetimeOffset(current_timestamp,
> 'Europe/Amsterdam'), to_char(current_timestamp, 'YYYY-MM-DD
> HH24:MI:SS.US0 TZH:TZM');
> ERROR:  invalid value for parameter "TimeZone": "tz_"
> CONTEXT:  SQL statement "set local timezone to tz_"
> PL/pgSQL function todatetimeoffset(timestamp with time zone,text) line 4
> at SQL statement
>
> But set_config() doesn't have that issue.

An example of how to deal with this:

CREATE OR REPLACE FUNCTION public.todatetimeoffset(ts_ timestamp with
time zone, tz_ text)
RETURNS character varying
LANGUAGE plpgsql
AS $function$
begin
--perform set_config('timezone', tz_, true /* local */);
EXECUTE 'set local timezone to ' || quote_literal(tz_);
return to_char(ts_, 'YYYY-MM-DD HH24:MI:SS.US0 TZH:TZM');
end;
$function$

select ToDatetimeOffset(now(), 'Europe/Amsterdam');
todatetimeoffset
------------------------------------
2024-01-12 18:32:02.5486820 +01:00

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com