Handling mysql errors with active record

[eluser]BlueCamel[/eluser]
How do you handle mysql records from active record? Is there a small example available? In my Lib I have the following:

Code:

function section_add( $param )
{
    $this->CI->db->insert( $param );
    return $this->CI->db->insert_id();
}

So I'm thinking if the insert fails it would be nice to catch and handle the mysql error. I'm a little lost on where I add the error checking in here. Can I expect the insert to return FALSE? What about the error code and error string from mysql?

Thanks.