How To Fix CFD_REGISTRY_CHECK122 - On clause of Association &1 in CDS View &2 has not only 'equal' operator

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_REGISTRY_CHECK - Custom Fields: Messages for Registry Check

• Message number: 122

• Message text: On clause of Association &1 in CDS View &2 has not only 'equal' operator

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CFD_REGISTRY_CHECK122 - On clause of Association &1 in CDS View &2 has not only 'equal' operator ?

  The SAP error message CFD_REGISTRY_CHECK122 indicates that there is an issue with the ON clause of an association in a Core Data Services (CDS) view. Specifically, it states that the ON clause of the association is not using only the 'equal' operator, which is a requirement for defining associations in CDS views.
  Cause:
  In CDS views, associations are used to define relationships between different entities. The ON clause of an association should only use the 'equal' operator (=) to establish a direct relationship between the fields of the associated entities. If the ON clause includes other operators (like >, <, >=, <=, <>, etc.), the system will raise this error.
  Solution:
  To resolve this error, you need to review the ON clause of the association in your CDS view definition. Here are the steps to fix the issue:
  
  
  Open the CDS View: Access the CDS view in the ABAP Development Tools (ADT) or the relevant development environment.
  
  
  Locate the Association: Find the association that is causing the error. Look for the define association statement in your CDS view.
  
  
  Check the ON Clause: Examine the ON clause of the association. Ensure that it only contains conditions that use the = operator. For example:
  define association to AnotherEntity as _AnotherEntity
  on $projection.Field1 = AnotherEntity.Field2
  
  
  Modify the ON Clause: If you find any operators other than =, modify the ON clause to use only the = operator. If you need to express more complex conditions, consider using additional associations or filtering in the SELECT statement instead.
  
  
  Activate the CDS View: After making the necessary changes, activate the CDS view to ensure that the error is resolved.
  
  
  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.
  Associations: In CDS, associations are used to define relationships between different entities, allowing for easier navigation and data retrieval.
  Error Handling: When working with CDS views, it's essential to understand the syntax and rules governing associations to avoid common errors.
  
  By following these steps, you should be able to resolve the CFD_REGISTRY_CHECK122 error and ensure that your CDS view is correctly defined.