Hi, I want to prefix a set of dataframes and I try two solutions: * A for loop calling withColumnRename based on columns() * transforming my Dataframe to and RDD, updating the old schema and recreating the dataframe.
both are working for me, the second one is faster with tables that contain 800 columns but have a more stage of transformation toRDD. Is there any other solution? Thank you -- M'BAREK Med Nihed, Fedora Ambassador, TUNISIA, Northern Africa http://www.nihed.com <http://tn.linkedin.com/in/nihed>
