spark git commit: [SPARK-12234][SPARKR] Fix ```subset``` function error when only set ```select``` argument

Repository: spark Updated Branches: refs/heads/branch-1.6 e65c88536 -> 93ef24638 [SPARK-12234][SPARKR] Fix ```subset``` function error when only set ```select``` argument Fix ```subset``` function error when only set ```select``` argument. Please refer to the

spark git commit: [SPARK-12234][SPARKR] Fix ```subset``` function error when only set ```select``` argument

Repository: spark Updated Branches: refs/heads/master 9fba9c800 -> d9d354ed4 [SPARK-12234][SPARKR] Fix ```subset``` function error when only set ```select``` argument Fix ```subset``` function error when only set ```select``` argument. Please refer to the