Jefffrey commented on code in PR #10176:
URL: https://github.com/apache/arrow-rs/pull/10176#discussion_r3451701394
##########
arrow-select/src/take.rs:
##########
@@ -256,11 +256,18 @@ fn take_impl<IndexType: ArrowPrimitiveType>(
*length as u32,
)?))
}
- DataType::Map(_, _) => {
+ DataType::Map(field, ordered) => {
let list_arr = ListArray::from(values.as_map().clone());
let list_data = take_list::<_, Int32Type>(&list_arr, indices)?;
- let builder =
list_data.into_data().into_builder().data_type(values.data_type().clone());
- Ok(Arc::new(MapArray::from(unsafe { builder.build_unchecked() })))
+ let (_, offsets, entries, nulls) = list_data.into_parts();
+ let entries = entries.as_struct().clone();
+ Ok(Arc::new(MapArray::try_new(
Review Comment:
i suppose the checks inside `try_new` are cheap enough to not be too much of
an impact 👍
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