waitingkuo commented on PR #3660:
URL:
https://github.com/apache/arrow-datafusion/pull/3660#issuecomment-1262812816
note that there're some functions don't work with timestamptz due to
mismatch function signatures
e.g.
```bash
❯ select extract(hour from now());
Plan("Coercion from [Utf8, Timestamp(Nanosecond, Some(\"UTC\"))] to the
signature OneOf([Exact([Utf8, Date32]), Exact([Utf8, Date64]), Exact([Utf8,
Timestamp(Second, None)]), Exact([Utf8, Timestamp(Microsecond, None)]),
Exact([Utf8, Timestamp(Millisecond, None)]), Exact([Utf8, Timestamp(Nanosecond,
None)])]) failed.")
```
i'd like to add these in separate pr
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