GPSnoopy commented on issue #8042:
URL: https://github.com/apache/arrow-rs/issues/8042#issuecomment-3183902898
Similarly, `PrimitiveRunBuilder` calls `RunArray::try_new` which creates the
value field as nullable, with no way to override this:
```rust
pub fn try_new(run_ends: &PrimitiveArray<R>, values: &dyn Array) ->
Result<Self, ArrowError> {
let run_ends_type = run_ends.data_type().clone();
let values_type = values.data_type().clone();
let ree_array_type = DataType::RunEndEncoded(
Arc::new(Field::new("run_ends", run_ends_type, false)),
Arc::new(Field::new("values", values_type, true)),
);
```
So far, I've not found a workaround for this part.
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