>
> Now, I am not able to directly use my RDD object and have it implicitly
> become a DataFrame. It can be used as a DataFrameHolder, of which I could
> write:
>
> rdd.toDF.registerTempTable("foo")
>
The rational here was that we added a lot of methods to DataFrame and made
the implicits more powerful, but that increased the likelihood of
accidental application of the implicit. I personally have had to explain
the accidental application of implicits (and the confusing compiler
messages that can result) to beginners so many times that we decided to
remove the subtle conversion from RDD to DataFrame and instead make it
explicit method call.
