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https://issues.apache.org/jira/browse/SPARK-1880?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin closed SPARK-1880.
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Resolution: Won't Fix
> Eliminate unnecessary job executions.
> -------------------------------------
>
> Key: SPARK-1880
> URL: https://issues.apache.org/jira/browse/SPARK-1880
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Takuya Ueshin
>
> There are unnecessary job executions in {{BroadcastNestedLoopJoin}}.
> When {{Innner}} or {{LeftOuter}} join, preparation of {{rightOuterMatches}}
> for {{RightOuter}} or {{FullOuter}} join is not neccessary.
> And when {{RightOuter}} or {{FullOuter}}, it should use not {{count}} and
> then {{reduce}} but {{fold}}.
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