Function Aggregate

cpp/src/arrow/compute/api_aggregate.h:295–300

  Aggregate() = default;

  Aggregate(std::string function, std::shared_ptr<FunctionOptions> options,
            std::vector<FieldRef> target, std::string name = "")
      : function(std::move(function)),
        options(std::move(options)),
        target(std::move(target)),
        name(std::move(name)) {}

  Aggregate(std::string function, std::shared_ptr<FunctionOptions> options,
            FieldRef target, std::string name = "")