[Dbix-class] using a function

[Octavian Rasnita]

Hi,

Please tell me how to do the following SQL clause, or tell me where to read 
how to do it. I have searched in some POD docs from SQL:: and DBIx::, but I 
couldn't find the answer.

... where date(date_field)='2007-06-08';

Thank you.

Octavian