Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/21439#discussion_r204274790
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/json/JacksonParser.scala
---
@@ -101,6 +102,17 @@ class JacksonParser(
}
}
+ private def makeArrayRootConverter(at: ArrayType): JsonParser =>
Seq[InternalRow] = {
+ val elemConverter = makeConverter(at.elementType)
+ (parser: JsonParser) => parseJsonToken[Seq[InternalRow]](parser, at) {
+ case START_ARRAY => Seq(InternalRow(convertArray(parser,
elemConverter)))
+ case START_OBJECT if at.elementType.isInstanceOf[StructType] =>
--- End diff --
I think it is a super weird case...can we put this special handling code
for back-compatibility in `JsonToStructs`?
Ether way, I think we should leave code comments here to make others
understood easily?
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