How To Fix CFD_GENERATION028 - Determination whether CDS View &1 is a projection view failed.

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_GENERATION - Custom Fields: Generation Handler

• Message number: 028

• Message text: Determination whether CDS View &1 is a projection view failed.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CFD_GENERATION028 - Determination whether CDS View &1 is a projection view failed. ?

  The SAP error message CFD_GENERATION028 indicates that there is an issue with determining whether a Core Data Services (CDS) view is a projection view. This error typically arises during the generation of a CDS view or when trying to use it in a context where a projection view is expected.
  Cause:
  
  Incorrect View Definition: The CDS view may not be defined correctly, or it may not meet the criteria to be recognized as a projection view.
  Missing Annotations: The necessary annotations that define the view's behavior or its relationship with other views may be missing.
  Dependency Issues: The CDS view may depend on other views or tables that are not accessible or have issues.
  Technical Errors: There could be technical issues in the underlying database or in the SAP system itself.
  
  Solution:
  
  Check View Definition: Review the definition of the CDS view to ensure it is correctly defined as a projection view. A projection view typically selects fields from one or more tables without any complex logic.
  Verify Annotations: Ensure that the necessary annotations are present in the CDS view. For example, check for @AbapCatalog.sqlViewName and other relevant annotations.
  Check Dependencies: Make sure that all dependent views and tables are available and correctly defined. If the CDS view relies on other views, ensure those views are also valid.
  Re-activate the View: Sometimes, simply re-activating the CDS view can resolve the issue. This can be done in the ABAP Development Tools (ADT) or in the SAP GUI.
  Check for Syntax Errors: Look for any syntax errors in the CDS view definition that might prevent it from being recognized correctly.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional guidance.
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) is a framework for defining semantically rich data models in SAP. Understanding how projection views work is crucial for effective use of CDS.
  Projection Views: These are views that primarily select fields from a single table or a combination of tables without complex joins or aggregations.
  SAP Documentation: Refer to the official SAP documentation for detailed information on creating and managing CDS views, including best practices and common pitfalls.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with the specific details of the error and the context in which it occurs.