waitingkuo opened a new issue, #3095:
URL: https://github.com/apache/arrow-datafusion/issues/3095
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
A clear and concise description of what the problem is. Ex. I'm always
frustrated when [...]
(This section helps Arrow developers understand the context and *why* for
this feature, in addition to the *what*)
sometimes it's not that easy to know the output type. e.g.
```bash
❯ select now();
+----------------------------+
| now() |
+----------------------------+
| 2022-08-10 06:36:01.967605 |
+----------------------------+
1 row in set. Query took 0.000 seconds.
```
i thought that it's a `Timestamp(Nanosecond, None)` until
```bash
❯ select now() + 1;
Plan("'Timestamp(Nanosecond, Some(\"UTC\")) + Int64' can't be evaluated
because there isn't a common type to coerce the types to")
```
**Describe the solution you'd like**
A clear and concise description of what you want to happen.
A `arrow_typeof` to output the type like this
```bash
❯ select arrow_typeof(now());
+---------------------------------------+
| arrowtypeof(now()) |
+---------------------------------------+
| Timestamp(Nanosecond, Some("UTC") |
+---------------------------------------+
1 row in set. Query took 0.000 seconds.
```
**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features
you've considered.
**Additional context**
Add any other context or screenshots about the feature request here.
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