Github user NarineK commented on the pull request:
https://github.com/apache/spark/pull/12493#issuecomment-214041344
@sun-rui , It seems that there are some recent changes in logical plans.
Specifically, there is no ObjectOperator in ../logical/object.scala but
ObjectsConsumers and Producers instead.
I'm a little confused. It seems that ObjectConsumer extends UnaryNode and
SerializeFromObject extends UnaryNode with ObjectConsumer .
Is it necessary that SerializeFromObject extends UnaryNode explicitly ?
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