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Posted to issues@spark.apache.org by "ShuMing Li (JIRA)" <ji...@apache.org> on 2019/07/30 03:07:00 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=16895725#comment-16895725 ]
ShuMing Li commented on SPARK-27602:
------------------------------------
What's the progress of this problem? Is there someone doing this?
Maybe we can support `Partition Level Statistics` just like [Hive|[https://jira.apache.org/jira/browse/HIVE-1361]] ?
> 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: 3.0.0
> Reporter: angerszhu
> Priority: Major
> Attachments: image-2019-05-05-11-46-41-240.png
>
>
> 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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