[WIP]CDS

 

1.Modeing Your First CDS View

 

you'll also learn how to user CDS views as basic building blocks for defining other CDS views as well as learn how to use CDS views as data sources in your ABAP logic.

that is, you'll learn how to select data from the modeled CDS views by leveraging the ABAP SQL syntax of ABAP.

CDS views represent the most important design-time artifacts within the range of supported CDS model types.

they allow you to flexibly transform the fixed design of database tables into suitable data models, on top of which you can then efficiently build your application.

1.1 Define the Data Model of the Application

to identify and name the different data sources, that is, the corresponding fundamental entities should also be correlated to one another based on their semantic relationships.

(1) 기초 엔티티 식별 (주요 데이터를 기반으로 기본적인 엔티티-데이터 모델 정의, 예를 들어 고객 제품 등)

(2) 데이터 소스와 엔티티 매핑 ( 각 엔티티가 어떤 데이터 소스에서 제공되는 지 명확하게 구분 - 예를 들어 고객정보는 crm에서)

(3) 시멘틱 관계 정의 : 주문 엔티티는 고객 엔티티와 연결 등

1.2 Implement the Data Model of the Application

1.2.1 Create Database Tables

1.2.2 Create a CDS View

1.2.3 Edit a CDS View

1.2.4 Create a Hierarchy of CDS Views

 

2. Fundamentals of CDS Data Modeling

3. Associations

4. Annotations

5. Access Controls

6. Business Services

7. Native SAP HANA Functions in CDS

8. Modeling Application Data

9. the Virtual Data Model in SAP S/4 HANA

10. Hierarchies in CDS

 

Business Semantics

In business reality, the important entities, such as employees or cost cen- Business semanticsters, can be found in many different hierarchical arrangements, often com-bined with other entities of the business world. Therefore, it’s common
practice to not include business attributes in the hierarchy node entities
but have a relation (association) to a separate entity that represents the employee or the cost center. Entities with different business semantics can
be combined in a hierarchy that way.