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https://issues.apache.org/jira/browse/SPARK-57200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-57200.
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Fix Version/s: 4.2.0
Resolution: Fixed
Issue resolved by pull request 56249
[https://github.com/apache/spark/pull/56249]
> JVM whole-stage codegen returns NULL for 3-arg form with column
> nullReplacement
> -------------------------------------------------------------------------------
>
> Key: SPARK-57200
> URL: https://issues.apache.org/jira/browse/SPARK-57200
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 4.2.0
> Reporter: Roy Huang
> Assignee: Roy Huang
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.2.0
>
>
> ArrayJoin.doGenCode silently returns NULL for every row when the third
> argument (nullReplacement) is a non-foldable column, the plan is fused in
> Whole-Stage Codegen (WSCG), and an upstream Filter with IsNotNull(array) has
> tightened the array (and/or delimiter) nullability. Interpreted eval() and
> Photon both return the correct joined string.
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