5 easy steps to extend standard CDS views

0
37694

Dear SAP Learners, in the blog post we will learn on how to extend standard CDS Views using Eclipse ABAP Development Tools(ADT).

Given some client/business requirements we may have to extend standard CDS views to add extra fields.

Also Read: How to find all standard and custom CDS views in the system

CDS View Extensions

A CDS view is extended by creating a new DDL source with DDL statement EXTEND VIEW.

As we know for every DDL source we have 2 corresponding dictionary objects created:

  • The CDS View and
  • SQL View

So when you extend a CDS view, there will be two corresponding objects created:

  • The CDS view extension and
  • Append View

Note:

CDS view development and extensions is done using Eclipse ABAP Development Tools(ADT).

Extend Standard CDS Views

Lets see the steps to extend a standard CDS view. In this example I will be using standard CDS view “SEPM_SDDL_SALESORDER_HEAD” and add 3 new fields.

1. Launch the Eclipse ABAP Development Tools.

2. In your ABAP project, select the relevant package in the Project Explorer.

3. Right-click on the package and choose: New – Other ABAP Repository Object – Core Data Services – Data Definition to open the creation wizard.

ABAP CDS View Extension 1
ABAP CDS View Extension 2

4. Enter the Name and the Description for the CDS view extension. Choose Next.

ABAP CDS View Extension 3

5. Assign a transport request, if prompted and choose Next.

6. Select the Extend View template and choose Finish.

ABAP CDS View Extension 4

7. In DDL source code editor, enter the necessary information for names of the append view, the original CDS view and for the actual view extension like below.

ABAP CDS View Extension 5

8. In the above CDS view source code, I have extended the view SEPM_SDDL_SALESORDER_HEAD with three new fields: overall_status, payment_terms and payment_method

9. Save and activate the newly created CDS view extension.

10. After successful activation, check the DDL SQL Append View “ZD_EXTENDAPPND” in SE11 transaction.

ABAP CDS View Extension 6

Additional fields are added to original CDS view using append view.

11. Now that, we have created CDS view extension lets check the output of the original CDS view using Data Preview

ABAP CDS View Extension 7

Key Notes

  • A standard CDS view can be extended using multiple CDS view extensions.
  • The annotation AbapCatalog.viewEnahancementCategory must be specified in ABAP CDS view with any of these values #PROJECTION_LIST, #GROUP_BY and #UNION.
  • A CDS view with AbapCatalog.viewEnahancementCategory as #NONE cannot be extended.

Conclusion

Congrats!! you have successfully learned how to extend standard CDS view using EXTEND VIEW.

Please feel free to comment and let us know your feedback. Subscribe for more updates.

If you liked it ❤️, please share it! Thanks! 🙏