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[SPARK-56182][SQL] Allow SPJ reducing identity to other transforms - #54980
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peter-toth wants to merge 1 commit into
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[SPARK-56182][SQL] Allow SPJ reducing identity to other transforms#54980peter-toth wants to merge 1 commit into
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peter-toth
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Mar 24, 2026
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I will rebease this PR once the bug fix #54961 landed. |
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cc @dongjoon-hyun , @szehon-ho |
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+1, LGTM. Thank you for rebasing, @peter-toth !
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Merged to master for Apache Spark 4.2.0. |
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What changes were proposed in this pull request?
Extended
KeyedShuffleSpecto support storage-partitioned joins (SPJ) where one side uses an identity transform (represented asAttributeReference) and the other side uses an arbitraryTransformExpression.Why are the changes needed?
Previously, SPJ with compatible transform reduction only worked for
(TransformExpression, TransformExpression)pairs. If one data source partitions by identity and the other by an arbitrary transform (e.g. bucket), SPJ was not triggered even though the identity side's raw values can be reduced by simply applying the transform.Does this PR introduce any user-facing change?
No.
How was this patch tested?
Added new test case.
Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Sonnet 4.6