liukun4515 commented on issue #2387:
URL: https://github.com/apache/arrow-rs/issues/2387#issuecomment-1225169192
I find other thing about the `casting`.
I writ the test code for `cast int32 to int8` like below
```
let a = Int32Array::from(vec![10000, 17890]);
let array = Arc::new(a) as ArrayRef;
let b = cast(&array, &DataType::Int8).unwrap();
let c = b.as_any().downcast_ref::<Int8Array>().unwrap();
println!("{:?}", c);
```
All data are out of the range int8, we will get `[NULL,NULL]`
But for decimal data type conversion, we will get `Error`.
I think the two results are not inconsistent.
Which is the right behavior for the `cast` when occurs overflow? @alamb
@tustvold
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