wiedld commented on code in PR #7842:
URL: https://github.com/apache/arrow-datafusion/pull/7842#discussion_r1367404217
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datafusion/physical-plan/src/sorts/builder.rs:
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@@ -42,15 +37,15 @@ pub struct BatchBuilder {
reservation: MemoryReservation,
/// The current [`BatchCursor`] for each stream
- cursors: Vec<BatchCursor>,
+ cursors: Vec<Option<BatchCursor<C>>>,
Review Comment:
This is indexed per stream. As such, we don't always have an ongoing cursor
per each stream => hence the option.
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