How to create abap cds view

How do you create a CDS view in SAP ABAP?

In your package, create a CDS view.

  1. Select the entity set and choose Preview.
  2. Log in using your ABAP Environment user and password; the Fiori Elements preview appears.
  3. By default, no columns are selected. To see the data, choose Settings, then choose Select All.
  4. Display the data by choosing Go.

How do I make a simple CD view?

  1. Create an ABAP project within Eclipse by logging in to S4 HANA system.
  2. Right click on your username under Local Objects and choose New->Other ABAP Repository Objects. Core Data Services->Data Definition.

What are ABAP CDS views?

A CDS view is defined for existing database tables and views, or for other CDS views in ABAP Dictionary, using the ABAP CDS statement DEFINE VIEW . A CDS view serves to define the structure of an SQL view and represents a projection onto one or several Dictionary tables or Dictionary views.

Can we debug CDS views?

You might also like to check Debugging in SAP HANA Studio/ADT/Eclipse. The last thing we want to cover today is how to consume a CDS View in ABAP Program. We can use the CDS View like any other table or data dictionary view in ABAP.

What is the difference between Hana CDS and ABAP CDS?

There are ABAP CDS views and HANA CDS views. ABAP CDS views are database independent whereas HANA CDS views are database dependent. The CDS objects created using HANA CDS is not controlled by ABAP dictionary and hence cannot be consumed in ABAP Programs or Open SQL.

What are the types of CDS views?

Answer: There are two types of CDS Views.

How many types of CDS views are there?

There are two types of CDS available: HANA CDS (defined in XS engine) ABAP CDS.

How do I combine two CDS views?

JOINs in CDS View In ABAP CDS, Join between two data sources is allowed. Allowed joins are:- Inner Join/Join Left Outer Join Right Outer Join The post shows a simple Inner Join between data sources form SCARR & SPFLI table. In HANA studio, open ABAP perspective.

Which CDS views Cannot be extended?

CDS view extensions themselves cannot be extended. EXTEND VIEW is used to make the following modification-free extensions: The elements of the extension list select_list_extension specified after EXTEND VIEW are added to the existing SELECT list. At least one element must be added.

What is CDS view in Hana?

SAP HANA CDS views are defined at SAP HANA database level. Views are created and maintained in DDL files stored in the SAP HANA XS (HANA Extended Application Services) database. The views use Native SQL. HANA CDS views aim to support the development of native SAP HANA applications.

How do I use CDS view?

CDS view is also called a VDM i.e. Virtual Data Model as there is no data persistence happening. All the SQL like code written in a CDS view pick the data from Base tables directly or via other CDS view at RUNTIME .

How do I open CDS files?

CDS Views can be previewed right within the Eclipse editor. To do this, right-click on the created view, select “Open With” and then select “Data Preview” from the submenu. (Note that in other versions of the ABAP Development Tools, the “Data Preview” option may appear immediately in the menu when you right click.)

How can I improve my standard CDS view?

Provide the SQL View Append name and the CDS view name to be extended and the filed list. Activate the extend view. Make a data preview of the base CDS view and it shows the CDS view fields as well as the extension view fields. Open the SQL view APPEND in SE11.

What is Association in CDS view?

An association in a CDS view associates source data source with a target data source. The cardinality [min . . max] defines the cardinality of the target data source. min – can be omitted then assumed as 0 , min can not be * . max- cannot be 0, max can be * means any no of rows.

What is path expression in CDS view?

A path expression is a string of associations separated by periods (.) Path expressions can be specified in the ABAP CDS DDL as data sources data_source, as elements of SELECT lists, and as operands of WHERE conditions or HAVING conditions.

What is projection in CDS view?

Projection views provide means within the specific service to define service-specific projections including denormalization of the underlying data model. Fine-tuning, which does not belong to the general data model layer is defined in projection views.

What is cardinality in CDS view?

Cardinality is the relationship between the source and associated CDS View (or table) , included in the definition of the association as [min.. max]. The specified cardinality is evaluated by the syntax check for paths specified in the CDS DDL of CDS or in ABAP SQL.

What are the supported joins in CDS view?

Defines a join between two data sources of a CDS view. Inner joins, outer joins, and cross joins are all possible: A join between two data sources using INNER JOIN or just JOIN selects all entries of the data sources whose fields meet the ON condition.