Cdbhttpsession Class

If i add a new column to the YiiSession table, i can write data to that column by creating session storage class extending CdbHttpSession class. It seems, writeSession() method also writes session data to DB, but to the default columns(id, expire and data) of YiiSession table. Can i use this method to write data to the column that i have added?

I used gii to create module on sessions table, it’s no any problem when you create your own new columns, and I also extended this module for each users, so each user can change their session time out.