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Posted to issues@spark.apache.org by "Liang-Chi Hsieh (JIRA)" <ji...@apache.org> on 2016/08/02 05:39:20 UTC

[jira] [Created] (SPARK-16849) Improve subquery execution by deduplicating the subqueries with the same results

Liang-Chi Hsieh created SPARK-16849:
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             Summary: 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


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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