How To Fix /IWBEP/CM_EQ026 - Attribute '&1' is missing in select clause

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_EQ -

• Message number: 026

• Message text: Attribute '&1' is missing in select clause

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_EQ026 - Attribute '&1' is missing in select clause ?

  The SAP error message /IWBEP/CM_EQ026 Attribute '&1' is missing in select clause typically occurs in the context of SAP Gateway and OData services. This error indicates that a required attribute (field) is not included in the SELECT clause of the underlying database query for the OData service.
  Cause:
  
  Missing Attribute in the SELECT Clause: The attribute specified in the error message is not included in the SELECT statement of the data retrieval logic (e.g., in the method that fetches data for the OData service).
  Model Definition Issues: The OData model may define attributes that are not being fetched from the database.
  Service Implementation: The implementation of the OData service might not be correctly fetching all the required fields.
  
  Solution:
  
  
  Check the OData Service Implementation:
  
  Go to the implementation of the OData service (e.g., in the DPC class).
  Ensure that the SELECT statement includes the attribute mentioned in the error message.
  
  
  
  Update the SELECT Statement:
  
  Modify the SELECT statement to include the missing attribute. For example, if you are using ABAP, ensure that the field is part of the SELECT query.
  
  
  
  Check the Data Model:
  
  Verify that the data model (e.g., the metadata) correctly defines the attributes that should be available in the OData service.
  If the attribute is newly added, ensure that the service is re-generated to include the new fields.
  
  
  
  Regenerate the OData Service:
  
  If changes were made to the data model or the service implementation, regenerate the OData service to ensure that all changes are reflected.
  
  
  
  Test the Service:
  
  After making the necessary changes, test the OData service to ensure that the error is resolved and that the required data is being returned.
  
  
  
  Related Information:
  
  Transaction Codes: Use transaction codes like /IWFND/MAINT_SERVICE to manage OData services and /IWBEP/REG_SERVICE to register or re-register services.
  Debugging: Use the ABAP debugger to step through the data retrieval logic to identify where the missing attribute should be included.
  SAP Notes: Check for any relevant SAP Notes that might address known issues with specific versions of SAP Gateway or OData services.
  
  By following these steps, you should be able to resolve the error and ensure that the required attributes are included in the OData service's SELECT clause.