On 1/11/24 6:20 PM, Jim Nasby wrote:
On 1/11/24 5:53 PM, Tom Lane wrote:
Adrian Klaver <adrian.klaver@xxxxxxxxxxx> writes:
test=# select to_char(now() AT TIME ZONE 'Europe/Amsterdam', 'YYYY-MM-DD
HH24:MI:SS.US0 TZH:TZM') ;
to_char
------------------------------------
2024-01-12 00:44:57.5421420 +00:00
(1 row)
You end up with string that does not the correct offset as the AT TIME
ZONE outputs a timestamp not timestamptz value.
Yeah. to_char() does not have any source for the TZ/TZH/TZM fields
other than the prevailing value of the timezone parameter, so you
really have to set that the way you want if you desire to use these
format fields. As noted upthread, SET LOCAL together with a (dummy)
"SET timezone" clause in the function definition can be used to get
the effect of a function-local setting of the parameter. I don't
know of another way to achieve that result above the C-code level.
regards, tom lane
Sorry, I was implying that you could use the generated timestamp without
timezone as a string and supply the necessary timezone:
select to_char(timestamptz(timezone('UTC',tstz) || ' CST6CDT'),
'YYYY-MM-DD HH24:MI:SS.US0 TZH:TZM') from tstz ;
to_char
------------------------------------
2024-01-11 23:29:00.0493300 -06:00
(1 row)
NEVERMIND... I see now that doesn't actually work.
Perhaps we should add a variant of timezone() that handles this use-case...
--
Jim Nasby, Data Architect, Austin TX
