* ���� IQueryable�� ���������� Queryable�� ��ӹ��� ���� Ŭ������
* EmptyQueryable, TimeOutQuery, XAUserProcedure�� �̰͵��� �ٸ� Queryable�� ���� �ϳ��� Ʈ��������� ó���ɼ� ���� ������
*/
public void testFirst() throws Exception {
IUserCommand ins = dc.createUserCommand("insert into update_sample values(?,?)") ;
ins.addParam(1).addParam("abc") ;
IUserCommand sel = dc.createUserCommand("select * from update_sample") ;
CombinedUserProcedures upts = dc.createCombinedUserProcedures("combined") ;
upts.add(ins, "ins", IQueryable.UPDATE_COMMAND)
.add(sel, "sel", IQueryable.QUERY_COMMAND) ;