private String generateVariables(BusinessRule businessRule) {
        String variables = "";
        if(businessRule.getAttribute1() != null && businessRule.getAttribute2() != null){
            if(!businessRule.getAttribute1().getTabel().equals(businessRule.getAttribute2().getTabel())
               || !businessRule.getAttribute1().getKolom().equals(businessRule.getAttribute2().getKolom())){
                variables += "v_temp " + businessRule.getAttribute1().getTabel() + "." + businessRule.getAttribute1().getKolom() + "%type;";
            }
        }
        return variables;
    }