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https://issues.apache.org/jira/browse/SPARK-50496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-50496.
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Resolution: Duplicate
Duplicate/already-done: 'Change partitioning to SinglePartition if partition
number is 1' was implemented under SPARK-34919 (Fixed 3.2.0, commit
89ae83d19b96) and is present on master.
> Change partitioning to SinglePartition if partition number is 1
> ---------------------------------------------------------------
>
> Key: SPARK-50496
> URL: https://issues.apache.org/jira/browse/SPARK-50496
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.2.0
> Reporter: Gui Huawen
> Priority: Major
> Labels: pull-request-available
>
> For node `RebalancePartitions` and `RebalanceByExpression`, if partition
> number is 1 we can use `SinglePartition` instead of other `Partitioning`.
> h4.
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