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https://issues.apache.org/jira/browse/SPARK-27602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830836#comment-16830836
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angerszhu commented on SPARK-27602:
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Want to do this need to change the calculate model. I am tring to build a
framework to estimate cost of a sql, need to solve this. If it ‘s ok for the
origin model . I will try to change it.
On 05/01/2019 00:43, [1]Hyukjin Kwon (JIRA) wrote:
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https://issues.apache.org/jira/browse/SPARK-27602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830455#comment-16830455
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Hyukjin Kwon commented on SPARK-27602:
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So, what's proposal to fix it?
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> 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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