presto-main/src/main/java/io/prestosql/operator/scalar/MathFunctions.java/MathFunctions/power
class MathFunctions:    @Description("value raised to the power of exponent")
    @ScalarFunction(alias = "pow")
    @SqlType(StandardTypes.DOUBLE)
    public static double power(@SqlType(StandardTypes.DOUBLE) double num, @SqlType(StandardTypes.DOUBLE) double exponent)
    {
        return Math.pow(num, exponent);
    }