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https://issues.apache.org/jira/browse/SPARK-37376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17446222#comment-17446222
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Apache Spark commented on SPARK-37376:
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User 'sunchao' has created a pull request for this issue:
https://github.com/apache/spark/pull/34656
> Introduce a new DataSource V2 interface HasPartitionKey
> --------------------------------------------------------
>
> Key: SPARK-37376
> URL: https://issues.apache.org/jira/browse/SPARK-37376
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: Chao Sun
> Priority: Major
>
> One of the pre-requisite for the feature is to allow V2 input partitions to
> report their partition values to Spark, which can use them to compare if both
> sides of join are co-partitioned, and also optionally group input partitions
> together.
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