hyukjinkwon aeb45df668 [SPARK-22844][R] Adds date_trunc in R API ... ## What changes were proposed in this pull request? This PR adds `date_trunc` in R API as below: ```r > df <- createDataFrame(list(list(a = as.POSIXlt("2012-12-13 12:34:00")))) > head(select(df, date_trunc("hour", df$a))) date_trunc(hour, a) 1 2012-12-13 12:00:00 ``` ## How was this patch tested? Unit tests added in `R/pkg/tests/fulltests/test_sparkSQL.R`. Author: hyukjinkwon <gurwls223@gmail.com> Closes #20031 from HyukjinKwon/r-datetrunc.		2017-12-24 01:18:11 +09:00
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fulltests	[SPARK-22844][R] Adds date_trunc in R API	2017-12-24 01:18:11 +09:00
run-all.R	[SPARK-22344][SPARKR] clean up install dir if running test as source package	2017-11-10 10:22:42 -08:00