get_compiled_select() doesn't work :(

[eluser]bastien31[/eluser]
Hi,

I want to use the activerecord method get_compiled_select() in order to do some subquery.

I found it here : http://codeigniter.com/nightly_user_guid...led-select

But I have this error :

Fatal error: Call to undefined method CI_DB_mysql_driver::get_compiled_select() in D:\Projets Web\xampp\htdocs\www\CodeIgniter_2.0.3\application\models\dashboard_model.php on line 10

Any idea ? Do I have to load some other library than database ?

thanks
Bastien