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https://issues.apache.org/jira/browse/SPARK-33758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-33758:
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Assignee: Apache Spark
> Prune unnecessary output partitioning when the attribute is not part of
> output.
> -------------------------------------------------------------------------------
>
> Key: SPARK-33758
> URL: https://issues.apache.org/jira/browse/SPARK-33758
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.1, 3.1.0
> Reporter: Prakhar Jain
> Assignee: Apache Spark
> Priority: Major
>
> Consider the query:
>
> select t1.id from t1 JOIN t2 on t1.id = t2.id
>
> This query will have top level Project node which will just project t1.id.
> But the outputPartitioning of this project node will be:
> PartitioningCollection(HashPartitioning(t1.id), HashPartitioning(t2.id))
>
> We should drop HashPartitioning(t2.id) from outputPartitioning of Project
> node.
>
> cc - [~maropu] [~cloud_fan]
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