How To Fix SADL_EXPOSURE073 - Cardinality of association '&1' of entity '&2' is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_EXPOSURE - Errors During Exposure Compilation

• Message number: 073

• Message text: Cardinality of association '&1' of entity '&2' is not unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_EXPOSURE073 - Cardinality of association '&1' of entity '&2' is not unique ?

  The SAP error message SADL_EXPOSURE073 indicates that there is an issue with the cardinality of an association in the context of the SAP ABAP programming model, particularly when working with the SAP Data Access Layer (SADL). This error typically arises when the system detects that the cardinality of an association is not unique, which can lead to ambiguity in data retrieval.
  Cause:
  The error occurs when:
  
  An association defined in the data model has a cardinality that does not uniquely identify the relationship between two entities. For example, if an association is defined as one-to-many (1:N) or many-to-many (N:M) but is expected to be one-to-one (1:1) or one-to-many (1:N) in a specific context, it can lead to this error.
  The underlying data model does not enforce uniqueness constraints that are expected by the application logic.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Data Model: Check the definition of the entities and their associations in the data model. Ensure that the cardinality is correctly defined according to the business requirements.
  
  
  Adjust Cardinality: If the association is incorrectly defined, modify the cardinality in the data model to reflect the correct relationship. For example, if an association should be one-to-one, ensure that it is defined as such.
  
  
  Check for Unique Constraints: Ensure that the relevant fields in the database tables have unique constraints if they are expected to be unique. This may involve adding unique indexes or constraints in the database.
  
  
  Test the Changes: After making adjustments, test the changes to ensure that the error is resolved and that the application behaves as expected.
  
  
  Consult Documentation: Refer to SAP documentation or the SAP Community for additional guidance on defining associations and cardinalities in the context of your specific SAP environment.
  
  
  Related Information:
  
  SAP Data Model: Understanding how entities and associations are defined in the SAP data model is crucial for resolving cardinality issues.
  ABAP Programming Model: Familiarity with the ABAP programming model and how it interacts with the SADL can help in troubleshooting and resolving issues.
  SAP Notes and Community: Check for any relevant SAP Notes or community discussions that may provide insights or solutions related to this error message.
  
  By following these steps, you should be able to identify and resolve the issue causing the SADL_EXPOSURE073 error in your SAP environment.