presto-spi/src/main/java/io/prestosql/spi/type/LongDecimalType.java/LongDecimalType/LongDecimalType
class LongDecimalType:    LongDecimalType(int precision, int scale)
    {
        super(precision, scale, Slice.class);
        validatePrecisionScale(precision, scale, MAX_PRECISION);
    }