How To Fix SADL_GW_DT_CDS033 - Key field &1 must not be annotated as &2.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 033

• Message text: Key field &1 must not be annotated as &2.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW_DT_CDS033 - Key field &1 must not be annotated as &2. ?

  The SAP error message SADL_GW_DT_CDS033 indicates that there is an issue with the annotations of a key field in a Core Data Services (CDS) view. Specifically, the error states that a key field (denoted by &1) must not be annotated as a certain type (denoted by &2). This typically occurs when the key field is incorrectly annotated in the CDS definition.
  Cause:
  The error is usually caused by one of the following:
  
  Incorrect Annotations: A key field in the CDS view is annotated with an inappropriate annotation type. For example, a key field should not be annotated as @Aggregation or @UI if it is meant to be a key.
  Modeling Errors: There may be a misunderstanding in the data model where a field that is defined as a key is being treated as a non-key field or vice versa.
  Incompatibility with OData: If the CDS view is intended to be exposed as an OData service, certain annotations are required for key fields, and incorrect annotations can lead to this error.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Review the CDS View Definition:
  
  Open the CDS view in the ABAP Development Tools (ADT) or the relevant development environment.
  Check the annotations of the key field that is causing the error.
  
  
  
  Correct the Annotations:
  
  Ensure that the key field is annotated correctly. For example, it should not have annotations that are incompatible with key fields.
  Remove any inappropriate annotations from the key field.
  
  
  
  Validate the Data Model:
  
  Ensure that the data model is correctly defined, and that the key fields are properly identified.
  If necessary, consult the data model documentation or guidelines to ensure compliance.
  
  
  
  Test the Changes:
  
  After making the necessary changes, activate the CDS view and test it to ensure that the error is resolved.
  
  
  
  Check for Dependencies:
  
  If the CDS view is used in other objects (like OData services), ensure that those objects are also updated if necessary.
  
  
  
  Related Information:
  
  CDS Annotations: Familiarize yourself with the various annotations available for CDS views, especially those related to key fields and OData exposure.
  SAP Documentation: Refer to the official SAP documentation for Core Data Services and OData services for best practices and guidelines.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the SADL_GW_DT_CDS033 error and ensure that your CDS view is correctly defined and functional.