}
@Override
public void visit( NotExpression op ) throws FrontendException {
PONot pNot = new PONot(new OperatorKey(DEFAULT_SCOPE, nodeGen
.getNextNodeId(DEFAULT_SCOPE)));
// physOp.setAlias(op.getAlias());
currentPlan.add(pNot);
logToPhyMap.put(op, pNot);
ExpressionOperator from = (ExpressionOperator) logToPhyMap.get(op
.getExpression());
pNot.setExpr(from);
pNot.setResultType(op.getType());
pNot.setOperandType(op.getType());
try {
currentPlan.connect(from, pNot);
} catch (PlanException e) {
int errCode = 2015;
String msg = "Invalid physical operators in the physical plan" ;