Felix Cheung 671bc08ed5 [SPARK-19399][SPARKR] Add R coalesce API for DataFrame and Column ... ## What changes were proposed in this pull request? Add coalesce on DataFrame for down partitioning without shuffle and coalesce on Column ## How was this patch tested? manual, unit tests Author: Felix Cheung <felixcheung_m@hotmail.com> Closes #16739 from felixcheung/rcoalesce.		2017-02-15 10:45:37 -08:00
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testthat	[SPARK-19399][SPARKR] Add R coalesce API for DataFrame and Column	2017-02-15 10:45:37 -08:00