presto-main/src/main/java/io/prestosql/operator/scalar/MathFunctions.java/MathFunctions/degrees
class MathFunctions:    @Description("converts an angle in radians to degrees")
    @ScalarFunction
    @SqlType(StandardTypes.DOUBLE)
    public static double degrees(@SqlType(StandardTypes.DOUBLE) double radians)
    {
        return Math.toDegrees(radians);
    }