jorgecarleitao commented on a change in pull request #9402:
URL: https://github.com/apache/arrow/pull/9402#discussion_r576411810
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File path: rust/arrow/src/compute/kernels/cast.rs
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@@ -292,6 +343,30 @@ pub fn cast(array: &ArrayRef, to_type: &DataType) ->
Result<ArrayRef> {
Ok(list_array)
}
+ (_, LargeList(ref to)) => {
+ // cast primitive to list's primitive
+ let cast_array = cast(array, to.data_type())?;
+ // create offsets, where if array.len() = 2, we have [0,1,2]
+ let offsets: Vec<i64> = (0..=array.len() as i64).collect();
+ let value_offsets = Buffer::from_slice_ref(&offsets);
+ let list_data = ArrayData::new(
+ to.data_type().clone(),
+ array.len(),
+ Some(cast_array.null_count()),
+ cast_array
+ .data()
+ .null_bitmap()
+ .clone()
Review comment:
Same here.
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