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