Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18865#discussion_r136234146
--- 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 --
@dm-tran I think the current change can support your use cases. When only
`_corrupt_record` is selected, it is as the same as the effect of selecting all
columns, i.e. a record is recognized as corrupt if any column is in invalid
format.
However, it seems be countering the designed behavior that lets
`_corrupt_record` depend on the selected columns, as we discussed in previous
comments.
I think @gatorsmile's suggestion should be good.
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