debugging Models

[eluser]Ngulo[/eluser]
hi guys...i'm referring to this post cause i'm trying debugging with an echo a query like this:

Code:

$query =  $this->db->select('id','ip','date')
            ->from('asd');

    echo $query;

but it always returns me this error:

Code:

A PHP Error was encountered

Severity: 4096

Message: Object of class CI_DB_mysql_driver could not be converted to string

do you know why guys?

thanks