Bulk Operation

	T	Patch Info	Key	Summary	Assignee	Reporter	P	Status	Resolution	Created	Updated	Due	Development
			SPARK-32511	SPARK-22231 Add dropFields method to Column class	fqaiser94	fqaiser94		Resolved	Fixed	31/Jul/20	07/Oct/20
			SPARK-31317	SPARK-22231 Add withField method to Column class	fqaiser94	DB Tsai		Resolved	Fixed	31/Mar/20	08/Jul/20

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