Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/19492#discussion_r144755348 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/json/JacksonParser.scala --- @@ -89,6 +95,24 @@ class JacksonParser( /** * Create a converter which converts the JSON documents held by the `JsonParser` + * to a value according to a desired schema. This is an overloaded method to the + * previous one which allows to handle array of primitive types. + */ + private def makeRootConverter(at: ArrayType): JsonParser => Seq[Any] = { + (parser: JsonParser) => parseJsonToken[Seq[Any]](parser, at) { + case START_ARRAY => + val array = convertArray(parser, makeConverter(at.elementType)) + if (array.numElements() == 0) { + Nil + } else { + array.toArray(at.elementType).toSeq + } + case _ => Nil --- End diff -- Should we return `Nil` when it is not parsed to array? The original `makeRootConverter` didn't do this.
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