jorgecarleitao commented on a change in pull request #9402:
URL: https://github.com/apache/arrow/pull/9402#discussion_r576411761
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File path: rust/arrow/src/compute/kernels/cast.rs
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@@ -266,6 +278,45 @@ pub fn cast(array: &ArrayRef, to_type: &DataType) ->
Result<ArrayRef> {
let list = ListArray::from(Arc::new(array_data));
Ok(Arc::new(list) as ArrayRef)
}
+ (LargeList(_), LargeList(ref to)) => {
+ let data = array.data_ref();
+ let underlying_array = make_array(data.child_data()[0].clone());
+ let cast_array = cast(&underlying_array, to.data_type())?;
+ let array_data = ArrayData::new(
+ to.data_type().clone(),
+ array.len(),
+ Some(cast_array.null_count()),
+ cast_array
+ .data()
+ .null_bitmap()
+ .clone()
+ .map(|bitmap| bitmap.bits),
+ array.offset(),
+ // reuse offset buffer
+ data.buffers().to_vec(),
+ vec![cast_array.data()],
Review comment:
What do you think about making this a function/generic that is used by
both List and ListArray? It feels copy-pasted from `List`
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