Created by Jerry Wang, last modified on Sep 22, 2015
使用如下url 进行测试：
https://:4080/sap/opu/odata/sap/CRM_OPPORTUNITY/Opportunities?KaTeX parse error: Expected 'EOF', got '&' at position 22: …=Id,Description&̲top=1
返回结果只包含request的id和description：
how is OData url select option implemented in the backend 
how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend lo_expand_select包含我们url传入的id和description信息：
how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend how is OData url select option implemented in the backend 
