Revision 8a4e7dd896be20c560097c88ffd79c0d6c30d017 authored by Liang-Chi Hsieh on 05 October 2017, 14:36:18 UTC, committed by hyukjinkwon on 05 October 2017, 14:36:56 UTC
## What changes were proposed in this pull request? Looks like `FlatMapGroupsInRExec.requiredChildDistribution` didn't consider empty grouping attributes. It should be a problem when running `EnsureRequirements` and `gapply` in R can't work on empty grouping columns. ## How was this patch tested? Added test. Author: Liang-Chi Hsieh <viirya@gmail.com> Closes #19436 from viirya/fix-flatmapinr-distribution. (cherry picked from commit ae61f187aa0471242c046fdeac6ed55b9b98a3f6) Signed-off-by: hyukjinkwon <gurwls223@gmail.com>
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