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