mmooyyii opened a new issue, #17054:
URL: https://github.com/apache/datafusion/issues/17054
### Is your feature request related to a problem or challenge?
When using round(value::decimal) in datafusion, the decimal will implicit
cast to float64 and round returns float64.
It may lose decimal's precision.
I think round support decimal can make calculations safer
```
> select round('173975140545.855'::decimal(38,10),2);
+------------------------------------------+
| round(Utf8("173975140545.855"),Int64(2)) |
+------------------------------------------+
| 173975140545.85 |
+------------------------------------------+
1 row(s) fetched.
Elapsed 0.001 seconds.
```
same SQL in postgreSQL
```
postgres=# select round('173975140545.855'::decimal(38,10),2);
round
-----------------
173975140545.86
```
### Describe the solution you'd like
_No response_
### Describe alternatives you've considered
_No response_
### Additional context
_No response_
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