CDS Modeling Check (SADL/BOPF)

What causes this issue?

This ATC check evaluates annotations and CDS modelling to prevent
unexpected runtime issues
Examples:
- Transactional consumption views
(@ObjectModel.transactionalProcessingDelegated) have to use
transactional views as source (Annotation:
@ObjectModel.transactionalProcessingEnabled)
- Use the annotation @ObjectModel.draftEnabled only for transactional
consumption views or transactional views. All other views will cause
problems during the SADL runtime.
- Joins are not allowed in transactional consumption views.
- The root view of a composition must contain the annotation
@ObjectModel.compostionRoot.
- Transient fields in transactional consumption views must be read-only.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.