Lianhui Wang created SPARK-16456:
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Summary: Reuse the uncorrelated scalar subqueries with 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 on the same uncorrelated scalar subquery.
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