Function Count

cpp/src/arrow/compute/api_aggregate.cc:228–230

// Scalar aggregates

Result<Datum> Count(const Datum& value, const CountOptions& options, ExecContext* ctx) {
  return CallFunction("count", {value}, &options, ctx);
}

Result<Datum> Mean(const Datum& value, const ScalarAggregateOptions& options,
                   ExecContext* ctx) {