Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18865#discussion_r131887972
--- 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 --
> The column _corrupted_record is different when the selected columns are
different
If `_corrupted_record` is designed to have different values for different
selected columns, it may makes sense to set `_corrupted_record` to null if no
columns are selected.
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