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https://issues.apache.org/jira/browse/SPARK-35703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-35703.
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Fix Version/s: 3.3.0
Resolution: Fixed
Issue resolved by pull request 32875
[https://github.com/apache/spark/pull/32875]
> Relax constraint for Spark bucket join and remove HashClusteredDistribution
> ---------------------------------------------------------------------------
>
> Key: SPARK-35703
> URL: https://issues.apache.org/jira/browse/SPARK-35703
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Chao Sun
> Assignee: Chao Sun
> Priority: Major
> Fix For: 3.3.0
>
>
> Currently Spark has {{HashClusteredDistribution}} and
> {{ClusteredDistribution}}. The only difference between the two is that the
> former is more strict when deciding whether bucket join is allowed to avoid
> shuffle: comparing to the latter, it requires *exact* match between the
> clustering keys from the output partitioning (i.e., {{HashPartitioning}}) and
> the join keys. However, this is unnecessary, as we should be able to avoid
> shuffle when the set of clustering keys is a subset of join keys, just like
> {{ClusteredDistribution}}.
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