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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/04/13 19:52:25 UTC

[jira] [Created] (SPARK-14600) Push predicates through Expand

Davies Liu created SPARK-14600:
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             Summary: Push predicates through Expand
                 Key: SPARK-14600
                 URL: https://issues.apache.org/jira/browse/SPARK-14600
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Davies Liu


A grouping sets will be analyzed as Aggregate(Expand(Project)), the grouping attributes came from Project, but have different meaning in Project (equal to original grouping expression) and Expand (could be original grouping expression or null), this does not make sense, because the attribute has different result in different operator,

 A better way could be  Aggregate(Expand()), then we need to  fix SQL generation.



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