Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/4468#discussion_r24380694
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/DataFrameImpl.scala
---
@@ -409,8 +411,26 @@ private[sql] class DataFrameImpl protected[sql](
override def toJSON: RDD[String] = {
val rowSchema = this.schema
this.mapPartitions { iter =>
- val jsonFactory = new JsonFactory()
- iter.map(JsonRDD.rowToJSON(rowSchema, jsonFactory))
+ val writer = new CharArrayWriter()
+ // create the Generator without separator inserted between 2 records
+ val gen = new
JsonFactory().createGenerator(writer).setRootValueSeparator(null)
--- End diff --
Should we expect any test result change after using
`setRootValueSeparator(null)`?
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