SlaLevel::cleanDBonPurge PHP Method

    function cleanDBonPurge()
    {
        global $DB;
        parent::cleanDBOnPurge();
        $sql = "DELETE\n              FROM `glpi_slalevels_tickets`\n              WHERE `" . $this->rules_id_field . "` = '" . $this->fields['id'] . "'";
        $DB->query($sql);
    }