viirya commented on a change in pull request #30957:
URL: https://github.com/apache/spark/pull/30957#discussion_r571255682
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/BaseScriptTransformationExec.scala
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@@ -47,7 +47,13 @@ trait BaseScriptTransformationExec extends UnaryExecNode {
def ioschema: ScriptTransformationIOSchema
protected lazy val inputExpressionsWithoutSerde: Seq[Expression] = {
- input.map(Cast(_, StringType).withTimeZone(conf.sessionLocalTimeZone))
+ input.map { in =>
+ in.dataType match {
+ case _: ArrayType | _: MapType | _: StructType =>
+ new StructsToJson(in).withTimeZone(conf.sessionLocalTimeZone)
Review comment:
How do users know we serialize complex type data using json format? This
requires the external process know to parse json back to complext data, isn't?
Is it well known to use json for similar feature in Hive?
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