How To Fix SADL_GW_DT_CDS019 - The composition does not use consistent primary keys.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 019

• Message text: The composition does not use consistent primary keys.

What causes this issue?

Some CDS views of the composition use UUID-based keys, while other CDS
views of the composition use semantic keys.

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?

Use one key type consistently in your composition.

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_CDS019 - The composition does not use consistent primary keys. ?

  The SAP error message SADL_GW_DT_CDS019 indicates that there is an inconsistency in the primary keys used in a Core Data Services (CDS) view or a composition. This error typically arises when the primary keys defined in the underlying data sources do not match or are not consistent across the entities involved in the composition.
  Cause:
  
  
  Inconsistent Primary Keys: The primary keys defined in the different entities or tables that are being composed do not align. For example, if you are trying to join two tables, and one table has a primary key defined as ID while the other has it defined as ID_NO, this inconsistency will trigger the error.
  
  
  Missing Primary Key: One of the entities in the composition may not have a primary key defined, which is required for the composition to work correctly.
  
  
  Incorrect Associations: The associations defined in the CDS view may not correctly reflect the relationships between the entities, leading to inconsistencies in how the primary keys are interpreted.
  
  
  Solution:
  
  
  Check Primary Key Definitions: Review the primary key definitions in all the entities involved in the composition. Ensure that they are consistent and correctly defined.
  
  
  Align Key Names: If the primary keys have different names, consider renaming them to ensure consistency across the entities.
  
  
  Define Missing Keys: If any entity lacks a primary key, define one that uniquely identifies the records in that entity.
  
  
  Review Associations: Check the associations in your CDS view. Ensure that they are correctly defined and that they reflect the actual relationships between the entities.
  
  
  Use Annotations: If necessary, use annotations to explicitly define the primary keys in your CDS view.
  
  
  Test the Composition: After making the necessary changes, test the composition again to ensure that the error is resolved.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Core Data Services and the specific error message for more detailed guidance.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  Debugging Tools: Utilize SAP's debugging tools to trace the execution of the CDS view and identify where the inconsistency arises.
  
  By following these steps, you should be able to resolve the SADL_GW_DT_CDS019 error and ensure that your CDS composition works as intended.