public function setJson($json)
    {
        global $CFG, $PDOX;

        $q = $PDOX->queryDie("UPDATE {$CFG->dbprefix}{$this->TABLE_NAME}
                SET json = :SET WHERE $this->PRIMARY_KEY = :PK",
            array(":SET" => $json, ":PK" => $this->id)
        );
    }