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https://issues.apache.org/jira/browse/SPARK-16456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15368926#comment-15368926
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Apache Spark commented on SPARK-16456:
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User 'lianhuiwang' has created a pull request for this issue:
https://github.com/apache/spark/pull/14111
> Reuse the uncorrelated scalar subqueries with the same logical plan in a query
> ------------------------------------------------------------------------------
>
> Key: SPARK-16456
> URL: https://issues.apache.org/jira/browse/SPARK-16456
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Lianhui Wang
>
> In TPCDS Q14, the same physical plan of uncorrelated scalar subqueries from a
> CTE could be executed multiple times, we should re-use the same result to
> avoid the duplicated computing.
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