<parameter name="co_id" class="java.lang.String"/> <parameter name="para" class="java.lang.String"/> <queryString> <![CDATA[if($P{para}=1,(select *, company.co_name from contactmst, company where contactmst.co_id=company.co_id and contactmst.co_id=$P{co_id} and is_supplier='t'),(select *, company.co_name from contactmst, company where contactmst.co_id=company.co_id and contactmst.co_id=$P{co_id} and is_customer='t'))]]> </queryString> can any one help me to solve this problem