Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7301#discussion_r34231143
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala ---
@@ -220,6 +214,89 @@ object EvaluatePython {
// TODO(davies): we could improve this by try to cast the object to
expected type
case (c, _) => null
}
+
+
+ private val module = "pyspark.sql.types"
+
+ /**
+ * Pickler for StructType
+ */
+ private class StructTypePickler extends IObjectPickler {
+
+ private val cls = classOf[StructType]
+
+ def register(): Unit = {
+ Pickler.registerCustomPickler(cls, this)
+ }
+
+ def pickle(obj: Object, out: OutputStream, pickler: Pickler): Unit = {
+ out.write(Opcodes.GLOBAL)
+ out.write((module + "\n" + "_parse_datatype_json_string" +
"\n").getBytes)
--- End diff --
Should we pass an explicit character set to `getBytes`? I worry that
falling back to the platforms default encoding might cause problems if the
platform uses a wider encoding than Python expects.
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