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https://issues.apache.org/jira/browse/SPARK-28345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-28345.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 25106
[https://github.com/apache/spark/pull/25106]
> PythonUDF predicate should be able to pushdown to join
> ------------------------------------------------------
>
> Key: SPARK-28345
> URL: https://issues.apache.org/jira/browse/SPARK-28345
> Project: Spark
> Issue Type: Improvement
> Components: PySpark, SQL
> Affects Versions: 3.0.0
> Reporter: Liang-Chi Hsieh
> Assignee: Liang-Chi Hsieh
> Priority: Major
> Fix For: 3.0.0
>
>
> A Filter predicate using PythonUDF can't be push down into join condition,
> currently. A predicate like that should be able to push down to join
> condition. For PythonUDFs that can't be evaluated in join condition,
> {{PullOutPythonUDFInJoinCondition}} will pull them out later.
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