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https://issues.apache.org/jira/browse/SPARK-32276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-32276.
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Fix Version/s: 3.1.0
Resolution: Fixed
Issue resolved by pull request 29089
[https://github.com/apache/spark/pull/29089]
> Remove redundant sorts before repartition nodes
> -----------------------------------------------
>
> Key: SPARK-32276
> URL: https://issues.apache.org/jira/browse/SPARK-32276
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Anton Okolnychyi
> Assignee: Anton Okolnychyi
> Priority: Major
> Fix For: 3.1.0
>
>
> I think our {{EliminateSorts}} rule can be extended further to remove sorts
> before repartition, repartitionByExpression and coalesce nodes. Independently
> of whether we do a shuffle or not, each repartition operation will change the
> ordering and distribution of data.
> That's why we should be able to rewrite {{Repartition -> Sort -> Scan}} as
> {{Repartition -> Scan}}.
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