alamb commented on code in PR #3386:
URL: https://github.com/apache/arrow-datafusion/pull/3386#discussion_r967157748
##########
datafusion/core/src/physical_plan/sorts/sort_preserving_merge.rs:
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@@ -320,11 +317,14 @@ pub(crate) struct SortPreservingMergeStream {
/// An id to uniquely identify the input stream batch
next_batch_id: usize,
- /// min heap for record comparison
- min_heap: BinaryHeap<SortKeyCursor>,
+ /// Heap that yields [`SortKeyCursor`] in increasing order
+ heap: BinaryHeap<Reverse<SortKeyCursor>>,
/// target batch size
batch_size: usize,
+
+ /// row converter
+ row_converter: RowConverter,
Review Comment:
Great -- so we'll handle that discussion on
https://github.com/apache/arrow-rs/pull/2593
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