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https://issues.apache.org/jira/browse/SPARK-26375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wang, Gang resolved SPARK-26375.
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Resolution: Not A Problem
> Rule PruneFileSourcePartitions should be fired before any other rules based
> on table statistics
> -----------------------------------------------------------------------------------------------
>
> Key: SPARK-26375
> URL: https://issues.apache.org/jira/browse/SPARK-26375
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Wang, Gang
> Priority: Major
>
> In catalyst, some optimize rules are base on table statistics, like rule
> ReorderJoin, in which star schema is detected, and CostBasedJoinReorder. In
> these rules, statistics accuracy are crucial. While, currently all these
> rules are fired before partition pruning, which may result in inaccurate
> statistics.
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