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https://issues.apache.org/jira/browse/SPARK-47897?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun closed SPARK-47897.
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> ExpressionSet performance regression in scala 2.12
> --------------------------------------------------
>
> Key: SPARK-47897
> URL: https://issues.apache.org/jira/browse/SPARK-47897
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.5.1
> Reporter: Zhen Wang
> Assignee: Zhen Wang
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.2, 3.4.4
>
>
> After SPARK-38836, the `++` and `--` methods in ExpressionSet of scala 2.12
> were removed, causing performance regression.
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