waitingkuo opened a new issue, #3096:
URL: https://github.com/apache/arrow-datafusion/issues/3096
**Describe the bug**
A clear and concise description of what the bug is.
**To Reproduce**
Steps to reproduce the behavior:
```bash
❯ select date_part('hour', 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.")
```
note that it could be fixed by
```bash
❯ select date_part('hour', now()::timestamp);
+-------------------------------------------------------------------+
| datepart(Utf8("hour"),CAST(now() AS Timestamp(Nanosecond, None))) |
+-------------------------------------------------------------------+
| 6 |
+-------------------------------------------------------------------+
1 row in set. Query took 0.000 seconds.
```
the reason for that is `now()` output `timestamp with time zone`, but our
`date_part` doesn't work for it
**Expected behavior**
A clear and concise description of what you expected to happen.
**Additional context**
Add any other context about the problem here.
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