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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/01/26 07:02:34 UTC

[jira] [Commented] (SPARK-5404) Statistic of Logical Plan is too aggresive

    [ https://issues.apache.org/jira/browse/SPARK-5404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14291488#comment-14291488 ] 

Apache Spark commented on SPARK-5404:
-------------------------------------

User 'chenghao-intel' has created a pull request for this issue:
https://github.com/apache/spark/pull/4199

> Statistic of Logical Plan is too aggresive
> ------------------------------------------
>
>                 Key: SPARK-5404
>                 URL: https://issues.apache.org/jira/browse/SPARK-5404
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Cheng Hao
>
> The statistic number of a logical plan is quite helpful while do optimization like join reordering, however, the default algorithm is too aggressive, which probably lead to a totally wrong join order.



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