ABAP knows three types of data objects: Variables, Constants, and Literals. A variable is a data object with content that can change during runtime. A variable is identified by a name. The name is also used to address the data object at runtime. The starting value of an ABAP variables is always well-defined. Constants are similar to variables.

You want to learn how to define objects in ABAP Dictionary and ABAP Core Data Services. In the first step, you prepare the ABAP development environment, create a new package, and analyze some existing objects.

ABAP CDS makes it possible to define semantic data models on the standard database of an AS ABAP and support ABAP RAP using behavior models.

The SAP HANA Core Data Services (CDS) Reference explains how to use SAP HANA CDS to define and consume semantically rich, design-time data models in SAP HANA (on-premise). The model described in CDS

The VALUE #( ) expression is an elegant way to assign values to a structured data object. If you want to fill a whole structure, you can address each component individually as you saw in the previous example.

Sep 9, 2017 · To take advantage of SAP HANA for application development, SAP introduced a new data modeling infrastructure known as Core data services. With CDS, data models are defined and consumed on database server rather than on application server.

Sep 3, 2018 · Select to your ABAP package created in tutorial Create Simple Database Table for ABAP Environment and create a Core Data Services (CDS) data definition. Therefore right-click on your package Z_BOOKING_XXX and select New > Other Repository Object.

Like GDTs, SAP saves context data types as core data types or as aggregated data types in the ES Repository. The following figure provides an overview of the different levels of the data type development. A service interface for B2B communication is an example of where they could be applied. Naming Conventions.

You will define database tables in the ABAP dictionary, and views in ABAP core data services (CDS). You will model relations, add SQL logic, and enrich your views with metadata. In the end, you will protect your data against unauthorized read access and …

ABAP Core Data Services1 (CDS) is a data dictionary infrastructure that was introduced with SAP NetWeaver 7.40. It allows for defining and consuming semantically rich data models. The underlying principles are depicted in Figure 1.