jayzhan211 commented on issue #10368:
URL: https://github.com/apache/datafusion/issues/10368#issuecomment-2095237393
See the result in Postgres
```
postgres=# set timezone to '+08';
SET
postgres=# select '2020-11-30T08:00:00.000Z'::timestamp at time zone
'Europe/Brussels';
timezone
------------------------
2020-11-30 15:00:00+08
(1 row)
postgres=# set timezone to '+01';
SET
postgres=# select '2020-11-30T08:00:00.000Z'::timestamp at time zone
'Europe/Brussels';
timezone
------------------------
2020-11-30 08:00:00+01
(1 row)
postgres=# set timezone to '+00';
SET
postgres=# select '2020-11-30T08:00:00.000Z'::timestamp at time zone
'Europe/Brussels';
timezone
------------------------
2020-11-30 07:00:00+00
(1 row)
```
I think we should not return 9:00:00, because the local time for timezone +1
is 8:00:00.
If I understand correctly, the function you proposing is similar to the
example above, but the timezone is given into the function?
so `select to_local_time('2020-11-30T08:00:00.000Z'::timestamp, '+01'); `
should return `2020-11-30 08:00:00`, `select
to_local_time('2020-11-30T08:00:00.000Z'::timestamp, '+00'); ` should return
`2020-11-30 07:00:00` and likewise `2020-11-30 15:00:00` for '+08'
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