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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/04/30 16:43:00 UTC

[jira] [Commented] (SPARK-27602) SparkSQL CBO can't get true size of partition table after partition pruning

    [ https://issues.apache.org/jira/browse/SPARK-27602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830455#comment-16830455 ] 

Hyukjin Kwon commented on SPARK-27602:
--------------------------------------

So, what's proposal to fix it?

> SparkSQL CBO can't get true size of partition table after partition pruning
> ---------------------------------------------------------------------------
>
>                 Key: SPARK-27602
>                 URL: https://issues.apache.org/jira/browse/SPARK-27602
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.2.0, 2.3.0, 2.4.0
>            Reporter: angerszhu
>            Priority: Major
>
> When I want to do extract a cost of one sql for myself's cost framework,  I found that CBO  can't get true size of partition table  since when partition pruning is true. we just need corresponding partition's size. It just use the tables's statistic.



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