waitingkuo opened a new issue, #5750:
URL: https://github.com/apache/arrow-datafusion/issues/5750
### Describe the bug
while i try to use `date_trunc` to `Timestamp(Second, None)`, it returns
`Timestamp(Nanosecond, None)`
```bash
❯ select date_trunc('minute', to_timestamp_seconds(61));
+---------------------------------------------------------+
| datetrunc(Utf8("minute"),totimestampseconds(Int64(61))) |
+---------------------------------------------------------+
| 1970-01-01T00:01:00 |
+---------------------------------------------------------+
1 row in set. Query took 0.003 seconds.
❯ select arrow_typeof(date_trunc('minute', to_timestamp_seconds(61)));
+----------------------------------------------------------------------+
| arrowtypeof(datetrunc(Utf8("minute"),totimestampseconds(Int64(61)))) |
+----------------------------------------------------------------------+
| Timestamp(Nanosecond, None) |
+----------------------------------------------------------------------+
1 row in set. Query took 0.003 seconds.
```
The behavior is similar while I apply `date_trunc` to Timestamp with Millis
and Micros.
### To Reproduce
```bash
❯ select arrow_typeof(date_trunc('minute', to_timestamp_seconds(61)));
+----------------------------------------------------------------------+
| arrowtypeof(datetrunc(Utf8("minute"),totimestampseconds(Int64(61)))) |
+----------------------------------------------------------------------+
| Timestamp(Nanosecond, None) |
+----------------------------------------------------------------------+
1 row in set. Query took 0.003 seconds.
```
### Expected behavior
```bash
❯ select arrow_typeof(date_trunc('minute', to_timestamp_seconds(61)));
+----------------------------------------------------------------------+
| arrowtypeof(datetrunc(Utf8("minute"),totimestampseconds(Int64(61)))) |
+----------------------------------------------------------------------+
| Timestamp(Second, None) |
+----------------------------------------------------------------------+
1 row in set. Query took 0.003 seconds.
```
### Additional context
_No response_
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