Github user goldmedal commented on a diff in the pull request:
https://github.com/apache/spark/pull/18875#discussion_r137975716
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/json/JacksonGenerator.scala
---
@@ -193,14 +228,32 @@ private[sql] class JacksonGenerator(
*
* @param row The row to convert
*/
- def write(row: InternalRow): Unit = writeObject(writeFields(row, schema,
rootFieldWriters))
+ def write(row: InternalRow): Unit = dataType match {
+ case st: StructType =>
+ writeObject(writeFields(row, st, rootFieldWriters))
+ case _ => throw new UnsupportedOperationException(
--- End diff --
ok. I'll remove it.
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