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https://issues.apache.org/jira/browse/SPARK-6303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-6303.
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Resolution: Fixed
Fix Version/s: 1.4.0
Issue resolved by pull request 4996
[https://github.com/apache/spark/pull/4996]
> Remove unnecessary Average in GeneratedAggregate
> ------------------------------------------------
>
> Key: SPARK-6303
> URL: https://issues.apache.org/jira/browse/SPARK-6303
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
> Priority: Minor
> Fix For: 1.4.0
>
>
> Because {{Average}} is a {{PartialAggregate}}, we never get a {{Average}}
> node when reaching {{HashAggregation}} to prepare {{GeneratedAggregate}}.
> That is why in SQLQuerySuite there is already a test for {{avg}} with
> codegen. And it works.
> But we can find a case in {{GeneratedAggregate}} to deal with {{Average}}.
> Based on the above, we actually never execute this case.
> So we can remove this case from {{GeneratedAggregate}}.
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