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https://issues.apache.org/jira/browse/SPARK-16849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liang-Chi Hsieh updated SPARK-16849:
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Attachment: de-duplicating subqueries.pdf
> Improve subquery execution by deduplicating the subqueries with the same
> results
> --------------------------------------------------------------------------------
>
> Key: SPARK-16849
> URL: https://issues.apache.org/jira/browse/SPARK-16849
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
> Attachments: de-duplicating subqueries.pdf
>
>
> The subqueries in SparkSQL will be run even they have the same physical plan
> and output same results. We should be able to deduplicate these subqueries
> which are referred in a query for many times.
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