Function decimal64

cpp/src/arrow/type.cc:3360–3362

}

std::shared_ptr<DataType> decimal64(int32_t precision, int32_t scale) {
  return std::make_shared<Decimal64Type>(precision, scale);
}

std::shared_ptr<DataType> decimal128(int32_t precision, int32_t scale) {
  return std::make_shared<Decimal128Type>(precision, scale);