ve = vc.getVectorExpression(exprDesc);
assertTrue(ve instanceof IfExprLongColumnLongColumn);
// timestamp column/scalar IF where scalar is really a CAST of a constant to timestamp.
ExprNodeGenericFuncDesc f = new ExprNodeGenericFuncDesc();
f.setGenericUDF(new GenericUDFTimestamp());
f.setTypeInfo(TypeInfoFactory.timestampTypeInfo);
List<ExprNodeDesc> children2 = new ArrayList<ExprNodeDesc>();
f.setChildren(children2);
children2.add(new ExprNodeConstantDesc("2013-11-05 00:00:00.000"));
children1.set(2, f);