Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/21439#discussion_r204263502 --- 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 -- If an array of data is empty, and the schema is an array, it should return an empty array, https://github.com/apache/spark/pull/16929/files#diff-88230f171af0b7a40791a867f9dd3a36R389
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