Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/18865#discussion_r132889074 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JsonFileFormat.scala --- @@ -114,7 +114,16 @@ class JsonFileFormat extends TextBasedFileFormat with DataSourceRegister { } (file: PartitionedFile) => { - val parser = new JacksonParser(actualSchema, parsedOptions) + // SPARK-21610: when the `requiredSchema` only contains `_corrupt_record`, --- End diff -- Yeah, I agreed. With current behavior, it is unavoidable to have some strange queries with `_corrupted_record`. I'd suggest as https://github.com/apache/spark/pull/18865#discussion_r132688380, we should document `_corrupted_record` in CSV, JSON data sources is a derived column and can be incorrect if not used with other columns.
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