Github user gengliangwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/21439#discussion_r192501912
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
---
@@ -523,6 +523,11 @@ case class JsonToStructs(
// can generate incorrect files if values are missing in columns
declared as non-nullable.
val nullableSchema = if (forceNullableSchema) schema.asNullable else
schema
+ private val caseInsensitiveOptions = CaseInsensitiveMap(options)
+ private val unpackArray: Boolean = {
--- End diff --
Why do we need this? Can you add comments about it?
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