Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3418#discussion_r103206923
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/MapRunner.scala
---
@@ -41,7 +43,13 @@ class MapRunner[IN, OUT](
LOG.debug(s"Compiling MapFunction: $name \n\n Code:\n$code")
val clazz = compile(getRuntimeContext.getUserCodeClassLoader, name,
code)
LOG.debug("Instantiating MapFunction.")
- function = clazz.newInstance()
+ if (null == parameterValues || null == parameterTypes) {
--- End diff --
Same as `FlatMapRunner`
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