Why Scala Option is not a valid key?

Posted by Timur Fayruzov on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Why-Scala-Option-is-not-a-valid-key-tp5792.html

Hello,

I'm evaluating Flink and one thing I noticed is Option[A] can't be used as a key for coGroup (looking specifically here: https://github.com/apache/flink/blob/master/flink-scala/src/main/scala/org/apache/flink/api/scala/typeutils/OptionTypeInfo.scala#L39). I'm not clear about the reason of this and appreciate if someone can explain.

Thanks,

Timur