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https://issues.apache.org/jira/browse/SPARK-22673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16275141#comment-16275141
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Apache Spark commented on SPARK-22673:
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User 'CodingCat' has created a pull request for this issue:
https://github.com/apache/spark/pull/19864
> InMemoryRelation should utilize on-disk table stats whenever possible
> ---------------------------------------------------------------------
>
> Key: SPARK-22673
> URL: https://issues.apache.org/jira/browse/SPARK-22673
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Nan Zhu
>
> The current implementation of InMemoryRelation always uses the most expensive
> execution plan when writing cache
> With CBO enabled, we can actually have a more exact estimation of the
> underlying table size...
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