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https://issues.apache.org/jira/browse/SPARK-21619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16113586#comment-16113586
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Mark Hamstra commented on SPARK-21619:
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Or you can just enlighten me on how one should design a dispatch function for
multiple expressions of semantically equivalent query plans under the current
architecture. :) Dispatching based on a canonical form of a plan seems like an
obvious solution to me, but maybe I'm missing something.
> Fail the execution of canonicalized plans explicitly
> ----------------------------------------------------
>
> Key: SPARK-21619
> URL: https://issues.apache.org/jira/browse/SPARK-21619
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Reynold Xin
> Assignee: Reynold Xin
>
> Canonicalized plans are not supposed to be executed. I ran into a case in
> which there's some code that accidentally calls execute on a canonicalized
> plan. This patch throws a more explicit exception when that happens.
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