Split active record with if else statement

[eluser]danmontgomery[/eluser]

Code:

$this->db
    ->select('*')
    ->where('this_column', 'that')
    ->where('that_column', 'other');

if($statement){
    $this->db->like('another_column', 'blah');
}

$q = $this->db->get('projects');

if($q !== FALSE && $q->num_rows() > 0){
    return $q->result();
} else {
    return FALSE;
}