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https://issues.apache.org/jira/browse/SPARK-5791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321777#comment-14321777
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Yi Zhou commented on SPARK-5791:
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For the same input dataset size, it costs about ~2mins on hive on M/R with
optimization parameters but it costs about ~1hour on SparkSQL.
> [Spark SQL] show poor performance when multiple table do join operation
> -----------------------------------------------------------------------
>
> Key: SPARK-5791
> URL: https://issues.apache.org/jira/browse/SPARK-5791
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.2.0
> Reporter: Yi Zhou
>
> Spark SQL shows poor performance when multiple tables do join operation
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