Re: Time zone offset in to_char()

On 1/12/24 00:51, Alban Hertroijs wrote:

> Following up on my own mail from yesterday evening, here's the output
> that shows the function using set_config 'leaking' the timezone change
> to outside the function (the first select vs. the 2^nd  select) into the
> (same) transaction, whereas the function with the time zone bound to the
> header does not (the 3^rd  select).
> These are all from a single session, ran consecutively - a straight
> copy-paste from psql.

Alright I see what you are talking about.

>
> ciscache=> select ToDatetimeOffset(current_timestamp,
> 'Europe/Amsterdam'), to_char(current_timestamp, 'YYYY-MM-DD
> HH24:MI:SS.US0 TZH:TZM');
>           todatetimeoffset          |              to_char
> ------------------------------------+------------------------------------
>  2024-01-12 09:41:44.7019350 +01:00 | 2024-01-12 09:41:44.7019350 +01:00
> (1 row)
>
> ciscache=> select to_char(current_timestamp, 'YYYY-MM-DD HH24:MI:SS.US0
> TZH:TZM');
>               to_char
> ------------------------------------
>  2024-01-12 08:41:54.4739800 +00:00
> (1 row)
>
> ciscache=> select ToDatetimeOffsetNL(current_timestamp),
> to_char(current_timestamp, 'YYYY-MM-DD HH24:MI:SS.US0 TZH:TZM');
>          todatetimeoffsetnl         |              to_char
> ------------------------------------+------------------------------------
>  2024-01-12 09:42:44.1989210 +01:00 | 2024-01-12 08:42:44.1989210 +00:00
> (1 row)
>
> Regards,
> Alban Hertroijs.
>

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