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https://issues.apache.org/jira/browse/SPARK-30425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17010408#comment-17010408
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Sandeep Katta commented on SPARK-30425:
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[~gengliang]
> FileScan of Data Source V2 doesn't implement Partition Pruning
> --------------------------------------------------------------
>
> Key: SPARK-30425
> URL: https://issues.apache.org/jira/browse/SPARK-30425
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Haifeng Chen
> Priority: Major
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> I was trying to understand how Data Source V2 handling partition pruning, I
> didn't find the code anywhere which filtering out the unnecessary files in
> current Data Source V2 implementation. For a File data source, the base class
> FileScan of Data Source V2 possibly should handle this in "partitions"
> method. But the current implementation is like the following:
> protected def partitions: Seq[FilePartition] = {
> val selectedPartitions = fileIndex.listFiles(Seq.empty, Seq.empty)
>
> listFiles passed to empty sequence where no files will be filtered by the
> partition filter.
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