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https://issues.apache.org/jira/browse/SPARK-16958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15412578#comment-15412578
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Apache Spark commented on SPARK-16958:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/14548
> Reuse subqueries within single query
> ------------------------------------
>
> Key: SPARK-16958
> URL: https://issues.apache.org/jira/browse/SPARK-16958
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
>
> There could be same subquery within a single query, we could reuse the result
> without running it multiple times.
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