How To Fix SADL_GW_DT_CDS074 - At least one element of annotation &1 or &2 must be a key element.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 074

• Message text: At least one element of annotation &1 or &2 must be a key element.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW_DT_CDS074 - At least one element of annotation &1 or &2 must be a key element. ?

  The SAP error message SADL_GW_DT_CDS074 typically occurs in the context of Core Data Services (CDS) views when there is an issue with the annotations related to the key elements of the data model. This error indicates that at least one of the specified elements in the annotation must be a key element, but the current configuration does not meet this requirement.
  Cause:
  The error is usually caused by one of the following reasons:
  
  Missing Key Elements: The CDS view or the associated data model does not have a defined key element that is required for the operation you are trying to perform.
  Incorrect Annotations: The annotations in the CDS view may not be correctly defined, leading to a situation where the system cannot identify a key element.
  Data Model Configuration: The underlying data model may not be properly configured to include the necessary key fields.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Key Elements:
  
  Review the CDS view definition and ensure that at least one of the elements specified in the annotation is marked as a key element. You can do this by checking the @Key annotation in your CDS view.
  
  
  
  Modify Annotations:
  
  If the annotations are incorrect, modify them to ensure that they reference the correct key elements. For example, if you are using @ObjectModel.readOnly or similar annotations, ensure that they are correctly pointing to key fields.
  
  
  
  Update the CDS View:
  
  If necessary, update the CDS view to include the required key fields. You can do this by adding the appropriate fields to the define statement of the CDS view.
  
  
  
  Check Data Model:
  
  Ensure that the underlying data model (tables, views) has the necessary key fields defined. If you are using a join or association, make sure that the key fields are correctly defined in the associated entities.
  
  
  
  Activate the CDS View:
  
  After making changes, activate the CDS view to ensure that the changes take effect.
  
  
  
  Test the Changes:
  
  After activation, test the CDS view or the related functionality to ensure that the error is resolved.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Core Data Services and annotations to understand the requirements for key elements and how to define them properly.
  SAP Community: You can also check the SAP Community forums for similar issues and solutions shared by other users.
  Debugging Tools: Use debugging tools in the ABAP Development Environment to trace the execution and identify where the error is being triggered.
  
  By following these steps, you should be able to resolve the SADL_GW_DT_CDS074 error and ensure that your CDS view is correctly configured with the necessary key elements.