Prakhar Jain created SPARK-33758:
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Summary: 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
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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