How To Fix SADL_GW_DT_CDS038 - Key fields must be identical to key fields in transactional CDS view.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 038

• Message text: Key fields must be identical to key fields in transactional CDS view.

What causes this issue?

The key fields in the consumption CDS view must be identical to the key
fields in the transactional CDS view.
All key fields that are defined in the transactional CDS view must be
used in the consumption CDS view as well.
Additional key fields in the consumption CDS view are not allowed.

System Response

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

How to fix this error?

Enter the same key fields in the consumption CDS view as defined in the
transactional CDS view.
Renaming of the key fields in the consumption CDS view using aliases is
allowed.

Procedure for System Administrators

Contact the corresponding developer of the CDS view to correct the
error.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW_DT_CDS038 - Key fields must be identical to key fields in transactional CDS view. ?

  The SAP error message SADL_GW_DT_CDS038 indicates that there is a mismatch between the key fields defined in a transactional Core Data Services (CDS) view and the key fields expected in the data model or the service definition. This error typically arises when you are trying to create or consume a service based on a CDS view, and the key fields do not align as required.
  Cause
  The error occurs due to one of the following reasons:
  
  Key Field Mismatch: The key fields defined in the CDS view do not match the key fields expected by the service or the data model. This can happen if the CDS view is not properly defined or if there are changes in the underlying data model.
  Inconsistent Annotations: The annotations in the CDS view may not be correctly set, leading to discrepancies in how the key fields are interpreted.
  Changes in Data Model: If there have been recent changes to the underlying tables or structures that the CDS view is based on, it may lead to inconsistencies in key field definitions.
  
  Solution
  To resolve the error, you can follow these steps:
  
  
  Check Key Fields: 
  
  Open the CDS view in the ABAP Development Tools (ADT) or the relevant transaction (e.g., SE11).
  Verify that the key fields defined in the CDS view match the key fields expected by the service or the transactional model.
  
  
  
  Adjust Annotations:
  
  Ensure that the annotations for the key fields are correctly defined. For example, check if the @ObjectModel.key annotation is properly set for the key fields in the CDS view.
  
  
  
  Review Changes:
  
  If there have been recent changes to the underlying tables or structures, ensure that the CDS view is updated accordingly. You may need to regenerate the CDS view or adjust its definition to align with the changes.
  
  
  
  Activate the CDS View:
  
  After making any changes, make sure to activate the CDS view to ensure that the changes take effect.
  
  
  
  Test the Service:
  
  After resolving the key field issues, test the service again to ensure that the error is resolved.
  
  
  
  Related Information
  
  CDS Views: Core Data Services (CDS) are a way to define semantically rich data models in SAP. They allow for the definition of views that can be consumed by various applications, including Fiori apps and OData services.
  Key Fields: Key fields are essential for uniquely identifying records in a database table or view. In CDS views, they are defined to ensure that the data can be correctly retrieved and manipulated.
  Annotations: Annotations in CDS views provide metadata that can influence how the view is processed and consumed. They are crucial for defining aspects like key fields, data types, and relationships.
  
  By following the above steps, you should be able to resolve the SADL_GW_DT_CDS038 error and ensure that your CDS view and service definitions are correctly aligned.