presto-main/src/main/java/io/prestosql/operator/scalar/UrlFunctions.java/UrlFunctions/decodeUrl
class UrlFunctions:    private static Slice decodeUrl(String value)
    {
        try {
            return slice(URLDecoder.decode(value, UTF_8.name()));
        }
        catch (UnsupportedEncodingException e) {
            throw new AssertionError(e);
        }
        catch (IllegalArgumentException e) {
            throw new PrestoException(INVALID_FUNCTION_ARGUMENT, e);
        }
    }