@Test
public void testVisit_DateOp1() {
LOG.info("visit(DateOp1):");
Date END_DATE = _dtc.fromString("1998-12-31");
Date orderDateEnd = new DateSum(new ValueSpecification(_dtc, END_DATE), Calendar.DATE, -151).eval(null);
String dateExp = "1998-08-02";
Expression exp = new DateValue(" " + dateExp + " ");
exp.accept(_visitor);
Date jsqlDate = (Date) _visitor.getResult();