Github user shivaram commented on the pull request:
https://github.com/apache/spark/pull/9185#issuecomment-154490703
Thanks @marmbrus - That helps. Yeah so I think from my perspective it makes
sense to just have one *active* session for SparkR and thus just one active
SQLContext. This means that the change @felixcheung was working on to hide
`sqlContext` from users would still be required.
We should however add support for two things (a) Specifying a session in
`sparkR.init` (are sessions just named as strings ?) (b) a command to switch
sessions which will change the sqlContext and all the necessary data structures
under the covers so that commands run after this will run with the new session.
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