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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-21222) Move elimination of Distinct clause from analyzer to optimizer
Date Tue, 27 Jun 2017 04:14:02 GMT

     [ https://issues.apache.org/jira/browse/SPARK-21222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-21222:
------------------------------------

    Assignee:     (was: Apache Spark)

> Move elimination of Distinct clause from analyzer to optimizer
> --------------------------------------------------------------
>
>                 Key: SPARK-21222
>                 URL: https://issues.apache.org/jira/browse/SPARK-21222
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Gengliang Wang
>            Priority: Minor
>
> Distinct clause is after MAX/MIN clause 
> "Select MAX(distinct a) FROM src from"
>  is equivalent of 
> "Select MAX(distinct a) FROM src from"
> However, this optimization is implemented in analyzer. It should be in optimizer.



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