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From "Liang-Chi Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-6466) Remove unnecessary attributes when resolving GroupingSets
Date Mon, 23 Mar 2015 10:08:11 GMT
Liang-Chi Hsieh created SPARK-6466:
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             Summary: Remove unnecessary attributes when resolving GroupingSets
                 Key: SPARK-6466
                 URL: https://issues.apache.org/jira/browse/SPARK-6466
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Liang-Chi Hsieh
            Priority: Minor


When resolving GroupingSets, we currently list all outputs of GroupingSets's child plan. However,
the columns that are not in groupBy expressions and not used by aggregation expressions are
unnecessary and can be removed.



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