ExprNodeDesc constant = new ExprNodeConstantDesc(TypeInfoFactory.stringTypeInfo, "aaa");
List<ExprNodeDesc> children = Lists.newArrayList();
children.add(column);
children.add(constant);
ExprNodeDesc node = new ExprNodeGenericFuncDesc(TypeInfoFactory.stringTypeInfo,
new GenericUDFOPEqualOrLessThan(), children);
assertNotNull(node);
ExprNodeDesc column2 = new ExprNodeColumnDesc(TypeInfoFactory.stringTypeInfo, "rid", null,
false);
ExprNodeDesc constant2 = new ExprNodeConstantDesc(TypeInfoFactory.stringTypeInfo, "bbb");