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https://issues.apache.org/jira/browse/SPARK-21629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16115395#comment-16115395
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Liang-Chi Hsieh commented on SPARK-21629:
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[~hvanhovell] Sorry, I'm mentoring the few local developers in Taiwan for
contributing Spark. This looks a trivial PR. May I ask holding this issue for
one of the mentees? If you don't mind, can you help assign it to me
temporarily. Thanks!
> OR nullability is incorrect
> ---------------------------
>
> Key: SPARK-21629
> URL: https://issues.apache.org/jira/browse/SPARK-21629
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0, 2.1.1, 2.2.0
> Reporter: Herman van Hovell
> Priority: Minor
> Labels: Starter
>
> The SQL {{OR}} expression's nullability is slightly incorrect. It should only
> be nullable when both of the input expressions are nullable, and not when
> either of them is nullable.
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