jayzhan211 commented on code in PR #13133:
URL: https://github.com/apache/datafusion/pull/13133#discussion_r1818568050
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datafusion/physical-plan/src/sorts/merge.rs:
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@@ -97,6 +97,26 @@ pub(crate) struct SortPreservingMergeStream<C: CursorValues>
{
/// Cursors for each input partition. `None` means the input is exhausted
cursors: Vec<Option<Cursor<C>>>,
+ /// Configuration parameter to enable round-robin selection of tied
winners of loser tree.
+ enable_round_robin_tie_breaker: bool,
Review Comment:
With this, it is easier to test between enabled one and disabled one
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