presto-main/src/main/java/io/prestosql/type/UuidOperators.java/UuidOperators/uuid
class UuidOperators:    @Description("generates a random UUID")
    @ScalarFunction(deterministic = false)
    @SqlType(StandardTypes.UUID)
    public static Slice uuid()
    {
        java.util.UUID uuid = randomUUID();
        return wrappedLongArray(uuid.getMostSignificantBits(), uuid.getLeastSignificantBits());
    }