How To Fix DD_CDS_ANALYSIS303 - Cardinality &2 of Association &1 does not match to the ON-condition

SAP Error Message - Details

• Message type: E = Error

• Message class: DD_CDS_ANALYSIS - CDS code inspector messages

• Message number: 303

• Message text: Cardinality &2 of Association &1 does not match to the ON-condition

What causes this issue?

The cardinality &V2& of the association &V1& does not match to the given
ON-Condition:
If not all key-elements of the targeted data source are compared with an
EQUAL Operator with a corresponding element in the current data source,
a cardinality of TO-1 is not expected.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

This warning can be suppressed by putting the pseudo comment
/*+[hideWarning] { "IDS" : [ "CARDINALITY_CHECK" ] }*/
in front of the view definition or the association definition.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DD_CDS_ANALYSIS303 - Cardinality &2 of Association &1 does not match to the ON-condition ?

  The SAP error message DD_CDS_ANALYSIS303 indicates a mismatch in the cardinality of an association in a Core Data Services (CDS) view. Specifically, it means that the cardinality defined for an association does not align with the conditions specified in the ON clause of the association.
  Cause:
  
  Cardinality Mismatch: The cardinality defined in the association (e.g., one-to-one, one-to-many, etc.) does not match the actual relationship defined in the ON condition. For example, if the association is defined as one-to-many but the ON condition implies a one-to-one relationship, this error will occur.
  Incorrect ON Condition: The ON condition may not correctly reflect the intended relationship between the entities involved in the association.
  Data Model Issues: There may be issues in the underlying data model that lead to inconsistencies in the expected cardinality.
  
  Solution:
  
  
  Review the Association Definition: Check the definition of the association in your CDS view. Ensure that the cardinality specified matches the actual relationship between the entities.
  
  For example, if you have defined an association as @Cardinality: [1..*] (one-to-many), ensure that the ON condition reflects that.
  
  
  
  Check the ON Condition: Review the ON condition of the association. Make sure that it correctly represents the relationship between the two entities. Adjust the condition if necessary to align with the defined cardinality.
  
  
  Adjust Data Model: If the underlying data model has issues, consider revising it to ensure that the relationships between tables/entities are correctly defined and that they match the expected cardinalities.
  
  
  Testing: After making changes, test the CDS view to ensure that the error is resolved and that the data is being retrieved as expected.
  
  
  Related Information:
  
  Cardinality Definitions: Understand the different types of cardinalities (e.g., one-to-one, one-to-many, many-to-many) and how they affect the relationships in your data model.
  CDS Annotations: Familiarize yourself with CDS annotations that can help define associations and their properties more clearly.
  SAP Documentation: Refer to the official SAP documentation for Core Data Services for more detailed information on defining associations and handling cardinality.
  
  By carefully reviewing the association definitions and the ON conditions, you should be able to resolve the DD_CDS_ANALYSIS303 error effectively.