What is the best way to "SELECT FROM DUAL" in CUBRID?

I have found some korean forum references telling me that I could use db_root instead of dual, but I'm not sure if that's correct... I'm looking for a syntax-trick to allow for queries like

SELECT 1 WHERE 1 = 1

In some databases, the above syntax is already correct. In other databases, there is a dummy table called DUAL, which I can put to make the syntax work:

SELECT 1 FROM DUAL WHERE 1 = 1

What's the best thing to do in CUBRID? Currently, I've come up with this solution here (which I'm also using in jOOQ's Ingres integration):

SELECT 1 FROM (SELECT 1 AS DUAL) AS DUAL WHERE 1 = 1