How To Fix CFD_REGISTRY_CHECK375 - Foreign Key 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: 375

• Message text: Foreign Key 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_CHECK375 - Foreign Key Association &1 in CDS View &2 has not only 'equal' operator ?

  The SAP error message CFD_REGISTRY_CHECK375 indicates that there is an issue with the foreign key association in a Core Data Services (CDS) view. Specifically, it suggests that the foreign key association defined in the CDS view is not using only the 'equal' operator, which is a requirement for foreign key relationships in CDS views.
  Cause:
  The error occurs when:
  
  A foreign key association in the CDS view is defined with conditions that are not strictly equality checks. For example, if you are using operators like >, <, >=, <=, or any other non-equal operator in the association definition.
  The foreign key association is expected to link two tables based on a primary key relationship, which should only involve equality checks.
  
  Solution:
  To resolve this error, you should:
  
  
  Review the CDS View Definition: Check the definition of the foreign key association in your CDS view. Ensure that all conditions used in the association are based on equality (=).
  Example of a correct foreign key association:
  define view Z_CDS_View
  as select from Z_Table1
  inner join Z_Table2
  on Z_Table1.key_field = Z_Table2.key_field
  {
      // fields to select
  }
  
  
  Modify the Association: If you find any non-equal conditions, modify them to use equality. If you need to filter data based on other conditions, consider doing that in the main query or using a different approach.
  
  
  Check for Implicit Associations: Sometimes, implicit associations can cause issues. Ensure that any implicit associations are also correctly defined.
  
  
  Test the Changes: After making the necessary changes, activate the CDS view and test it 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.
  Foreign Key Associations: In CDS views, foreign key associations are used to define relationships between different entities (tables/views) based on primary key relationships.
  SAP Documentation: For more detailed information, refer to the official SAP documentation on CDS views and foreign key associations.
  
  By ensuring that your foreign key associations strictly use equality checks, you should be able to resolve the CFD_REGISTRY_CHECK375 error.