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https://issues.apache.org/jira/browse/SPARK-32376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17179450#comment-17179450
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Mukul Murthy commented on SPARK-32376:
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I'm sorry, I only saw the mail for this now. Attaching the file with our tests,
feel free to either use these as a reference or drop them in. Authored by Rahul
Govind from my team, he's rgovind3 on GitHub.
> 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
> Priority: Major
>
> 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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