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https://issues.apache.org/jira/browse/SPARK-20941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16032089#comment-16032089
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Apache Spark commented on SPARK-20941:
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User 'gatorsmile' has created a pull request for this issue:
https://github.com/apache/spark/pull/18169
> Subquery Reuse does not work
> ----------------------------
>
> Key: SPARK-20941
> URL: https://issues.apache.org/jira/browse/SPARK-20941
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Xiao Li
> Assignee: Xiao Li
>
> - Subquery reuse does not work.
> - It is sharing the same `SQLConf` (`spark.sql.exchange.reuse`) with the one
> for Exchange Reuse.
> - No test case covers the rule Subquery reuse.
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