felixcheung c76457c8e4 [SPARK-10903][SPARKR] R - Simplify SQLContext method signatures and use a singleton ... Eliminate the need to pass sqlContext to method since it is a singleton - and we don't want to support multiple contexts in a R session. Changes are done in a back compat way with deprecation warning added. Method signature for S3 methods are added in a concise, clean approach such that in the next release the deprecated signature can be taken out easily/cleanly (just delete a few lines per method). Custom method dispatch is implemented to allow for multiple JVM reference types that are all 'jobj' in R and to avoid having to add 30 new exports. Author: felixcheung <felixcheung_m@hotmail.com> Closes #9192 from felixcheung/rsqlcontext.		2016-05-26 11:20:20 -07:00
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testthat	[SPARK-10903][SPARKR] R - Simplify SQLContext method signatures and use a singleton	2016-05-26 11:20:20 -07:00