Hi All, I have been trying to serialize a dataframe in protobuf format. So far, I have been able to serialize every row of the dataframe by using map function and the logic for serialization within the same(within the lambda function). The resultant dataframe consists of rows in serialized format(1 row = 1 serialized message). I wish to form a single protobuf serialized message for this dataframe and in order to do that i need to combine all the serialized rows using some custom logic very similar to the one used in map operation. I am assuming that this would be possible by using the reduce operation on the dataframe, however, i am unaware of how to go about it. Any suggestions/approach would be much appreciated.
Thanks, Rishikesh
