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https://issues.apache.org/jira/browse/SPARK-32376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17187382#comment-17187382
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Apache Spark commented on SPARK-32376:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/29587

> Make unionByName null-filling behavior work with struct columns
> ---------------------------------------------------------------
>
>                 Key: SPARK-32376
>                 URL: https://issues.apache.org/jira/browse/SPARK-32376
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Mukul Murthy
>            Assignee: L. C. Hsieh
>            Priority: Major
>         Attachments: tests.scala
>
>
> https://issues.apache.org/jira/browse/SPARK-29358 added support for 
> unionByName to work when the two datasets didn't necessarily have the same 
> schema, but it does not work with nested columns like structs.



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