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Sun Rui authored
Author: Sun Rui <rui.sun@intel.com> Closes #5655 from sun-rui/SPARK-6818 and squashes the following commits: 7c66570 [Sun Rui] [SPARK-6818][SPARKR] Support column deletion in SparkR DataFrame API.
Sun Rui authoredAuthor: Sun Rui <rui.sun@intel.com> Closes #5655 from sun-rui/SPARK-6818 and squashes the following commits: 7c66570 [Sun Rui] [SPARK-6818][SPARKR] Support column deletion in SparkR DataFrame API.