How To Fix CSP_BDEF_CHECK021 - Field '&1' of CDS view '&2' must be named '&3' as in the persistent table

SAP Error Message - Details

• Message type: E = Error

• Message class: CSP_BDEF_CHECK - Messages for CSP-implemented BDEF checks

• Message number: 021

• Message text: Field '&1' of CDS view '&2' must be named '&3' as in the persistent table

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CSP_BDEF_CHECK021 - Field '&1' of CDS view '&2' must be named '&3' as in the persistent table ?

  The SAP error message CSP_BDEF_CHECK021 indicates that there is a mismatch between the field names defined in a Core Data Services (CDS) view and the corresponding field names in the underlying persistent table. This error typically arises during the activation of a CDS view when the field names do not align as expected.
  Cause:
  The error occurs due to one of the following reasons:
  
  Field Name Mismatch: The field name in the CDS view does not match the field name in the underlying database table. This could be due to a typo or a change in the database schema that was not reflected in the CDS view.
  Inconsistent Naming Conventions: If the naming conventions for fields in the CDS view and the database table are not consistent, this error may arise.
  Changes in the Underlying Table: If the underlying table has been modified (e.g., fields added, renamed, or removed) after the CDS view was created, it may lead to this error.
  
  Solution:
  To resolve the CSP_BDEF_CHECK021 error, you can follow these steps:
  
  
  Check Field Names: Verify the field names in the CDS view and compare them with the field names in the underlying persistent table. Ensure that they match exactly, including case sensitivity.
  
  
  Update the CDS View: If you find any discrepancies, update the CDS view to ensure that the field names match those in the persistent table. This may involve renaming fields in the CDS view or adjusting the underlying table if necessary.
  
  
  Re-activate the CDS View: After making the necessary changes, try to activate the CDS view again. This should resolve the error if all field names are now consistent.
  
  
  Check for Changes in the Database: If the underlying table has been modified, ensure that the CDS view is updated accordingly. You may need to regenerate the CDS view or create a new one if significant changes have occurred.
  
  
  Consult Documentation: If you are unsure about the correct field names or the structure of the underlying table, consult the relevant documentation or data dictionary (SE11) in SAP.
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) is a framework for defining semantically rich data models in SAP. It allows for the creation of views that can be consumed by various applications.
  Activation Errors: Activation errors in CDS views can often be traced back to inconsistencies between the view definition and the underlying data model.
  SAP Notes: Check SAP Notes for any known issues or updates related to the specific error message or the version of SAP you are using.
  
  By following these steps, you should be able to resolve the CSP_BDEF_CHECK021 error and ensure that your CDS view is correctly defined and activated.