viirya commented on code in PR #3534:
URL: https://github.com/apache/arrow-rs/pull/3534#discussion_r1071533600
##########
arrow-data/src/transform/mod.rs:
##########
@@ -473,6 +475,20 @@ impl<'a> MutableArrayData<'a> {
})
.collect::<Vec<_>>(),
},
+ DataType::RunEndEncodedType(_, _) => {
+ let run_ends_child = arrays
+ .iter()
+ .map(|array| &array.child_data()[0])
+ .collect::<Vec<_>>();
+ let value_child = arrays
+ .iter()
+ .map(|array| &array.child_data()[1])
+ .collect::<Vec<_>>();
+ vec![
+ MutableArrayData::new(run_ends_child, use_nulls,
array_capacity),
Review Comment:
It should be handled at `extend_nulls` for `RunEndEncoded` actually.
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