Spark Dataframe - Best way to cogroup dataframes

问题

I currently load CSV files into Dataframes using the databricks library.

I'm looking for the best generic approach to cogroup my loaded dataframes using a specific key since the cogroup operation is only available for PairRDDs.

I found this post which implements a cogroup feature for Dataframes but I guess there are some different approaches :

https://gist.github.com/ahoy-jon/b65754cde98cc48b9b38

Have you please ever faced this situation ?

Thanks.

来源：https://stackoverflow.com/questions/31806473/spark-dataframe-best-way-to-cogroup-dataframes