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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/06/27 04:14:02 UTC
[jira] [Assigned] (SPARK-21222) Move elimination of Distinct clause
from analyzer to optimizer
[ https://issues.apache.org/jira/browse/SPARK-21222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-21222:
------------------------------------
Assignee: 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
> Assignee: Apache Spark
> 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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