Github user SparkQA commented on the issue: https://github.com/apache/spark/pull/20933 **[Test build #89846 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/89846/testReport)** for PR 20933 at commit [`36c5c7f`](https://github.com/apache/spark/commit/36c5c7f48d92d1b2cef7ebef7a1259ef21672c32). * This patch **fails Spark unit tests**. * This patch merges cleanly. * This patch adds the following public classes _(experimental)_: * `class EmptyDataReader[T] extends DataReader[T] ` * `case class PartitionedFileDataReader[T](` * `case class FileDataReader[T](` * `abstract class FileSourceReader(options: DataSourceOptions, userSpecifiedSchema: Option[StructType])` * `abstract class ColumnarBatchFileSourceReader(` * `class RecordDataReadeWithProject[X, T](`
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