gengliangwang opened a new pull request #23961: [SPARK-27049][SQL] Support handling partition values in the abstraction of file source V2 URL: https://github.com/apache/spark/pull/23961 ## What changes were proposed in this pull request? In `FileFormat`, the method `buildReaderWithPartitionValues` appends the partition values to the end of the result returned by `buildReader`, so that for data sources like CSV/JSON/AVRO only need to implement `buildReader` to read a single file without taking care of partition values. This PR proposes to support handling partition values in file source v2 abstraction by: 1. Have two methods `buildReader` and `buildReaderWithPartitionValues` in `FilePartitionReaderFactory`, which have exactly the same meaning as they are in `FileFormat` 2. Rename `buildColumnarReader` as `buildColumnarReaderWithPartitionValues` to make the naming consistent. ## How was this patch tested? Existing unit tests.
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