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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/03/23 11:10:11 UTC

[jira] [Commented] (SPARK-6466) Remove unnecessary attributes when resolving GroupingSets

    [ https://issues.apache.org/jira/browse/SPARK-6466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14375657#comment-14375657 ] 

Apache Spark commented on SPARK-6466:
-------------------------------------

User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/5134

> 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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