Dandandan commented on code in PR #4714:
URL: https://github.com/apache/arrow-datafusion/pull/4714#discussion_r1056096585
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datafusion/core/src/physical_optimizer/repartition.rs:
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@@ -546,12 +538,12 @@ mod tests {
}
#[test]
- fn repartition_ignores_sort_preserving_merge() -> Result<()> {
+ fn repartition_with_preserving_merge() -> Result<()> {
let plan = sort_preserving_merge_exec(parquet_exec());
let expected = &[
"SortPreservingMergeExec: [c1@0 ASC]",
- // Expect no repartition of SortPreservingMergeExec
+ "RepartitionExec: partitioning=RoundRobinBatch(10)",
Review Comment:
This seems worse than before? I think round robin should not be added before
merge (at least currently, as we don't support parallel sort very well) as it
will increase the work needed.
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