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https://issues.apache.org/jira/browse/SPARK-21634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16114689#comment-16114689
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Reynold Xin commented on SPARK-21634:
-------------------------------------
Done in https://github.com/apache/spark/pull/18839
> Change OneRowRelation from a case object to case class
> ------------------------------------------------------
>
> Key: SPARK-21634
> URL: https://issues.apache.org/jira/browse/SPARK-21634
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 2.3.0
>
>
> OneRowRelation is the only plan that is a case object, which causes some
> issues with makeCopy using a 0-arg constructor. This patch changes it from a
> case object to a case class.
> This blocks SPARK-21619.
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