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https://issues.apache.org/jira/browse/SPARK-28323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16881717#comment-16881717
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Liang-Chi Hsieh commented on SPARK-28323:
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I found this bug when doing SPARK-28276.
> PythonUDF should be able to use in join condition
> -------------------------------------------------
>
> Key: SPARK-28323
> URL: https://issues.apache.org/jira/browse/SPARK-28323
> Project: Spark
> Issue Type: Bug
> Components: PySpark, SQL
> Affects Versions: 3.0.0
> Reporter: Liang-Chi Hsieh
> Priority: Major
>
> There is a bug in {{ExtractPythonUDFs}} that produces wrong result
> attributes. It causes a failure when using PythonUDFs among multiple child
> plans, e.g., join. An example is using PythonUDFs in join condition.
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