presto-main/src/main/java/io/prestosql/operator/scalar/MathFunctions.java/MathFunctions/modTinyint
class MathFunctions:    @Description("remainder of given quotient")
    @ScalarFunction("mod")
    @SqlType(StandardTypes.TINYINT)
    public static long modTinyint(@SqlType(StandardTypes.TINYINT) long num1, @SqlType(StandardTypes.TINYINT) long num2)
    {
        return num1 % num2;
    }