gengliangwang opened a new pull request #24296: [SPARK-27384][SQL] File source V2: Prune unnecessary partition columns URL: https://github.com/apache/spark/pull/24296 ## What changes were proposed in this pull request? When scanning file sources, we can prune unnecessary partition columns on constructing input partitions, so that: 1. Reduce the data transformation from Driver to Executors 2. Make it easier to implement columnar batch readers, since the partition columns are already pruned. ## How was this patch tested? Existing unit tests.
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