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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/04/20 06:55:25 UTC

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

     [ https://issues.apache.org/jira/browse/SPARK-14600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Davies Liu resolved SPARK-14600.
--------------------------------
       Resolution: Fixed
    Fix Version/s: 2.0.0

Issue resolved by pull request 12496
[https://github.com/apache/spark/pull/12496]

> 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
>             Fix For: 2.0.0
>
>
> 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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