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https://issues.apache.org/jira/browse/SPARK-9293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14639837#comment-14639837
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Apache Spark commented on SPARK-9293:
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User 'JoshRosen' has created a pull request for this issue:
https://github.com/apache/spark/pull/7631
> Analysis should detect when set operations are performed on tables with
> different numbers of columns
> ----------------------------------------------------------------------------------------------------
>
> Key: SPARK-9293
> URL: https://issues.apache.org/jira/browse/SPARK-9293
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Josh Rosen
> Assignee: Josh Rosen
>
> Our SQL analyzer doesn't always enforce that set operations are only
> performed on relations with the same number of columns.
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