How To Fix SADL_GW031 - Filter by element '&1' is not implemented

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW -

• Message number: 031

• Message text: Filter by element '&1' is not implemented

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW031 - Filter by element '&1' is not implemented ?

  The SAP error message SADL_GW031 indicates that there is an issue with a filter element in a Service Data Layer (SDL) query. Specifically, it means that the filter by the specified element (&1) is not implemented in the context of the query you are trying to execute. This can occur in various scenarios, such as when using OData services or when working with CDS views.
  Causes
  
  Unsupported Filter Element: The filter element you are trying to use in your query is not supported or implemented in the underlying data model or service.
  Incorrect Query Structure: The query may be incorrectly structured, leading to the system not recognizing the filter element.
  Missing Annotations: The necessary annotations for the filter element may not be defined in the CDS view or the OData service.
  Version Mismatch: There may be a version mismatch between the service and the client application, leading to unsupported features.
  
  Solutions
  
  Check Filter Element: Verify that the filter element you are trying to use is indeed supported in the context of the query. You can do this by checking the metadata of the OData service or the CDS view.
  Modify Query: If the filter element is not supported, consider modifying your query to use a different filter that is implemented.
  Update CDS View: If you have access to the CDS view, you may need to implement the filter element by adding the necessary annotations or logic to support it.
  Consult Documentation: Review the SAP documentation for the specific OData service or CDS view to understand the supported filter elements and their usage.
  Check for Updates: Ensure that you are using the latest version of the service or application, as updates may include new features or fixes for existing issues.
  
  Related Information
  
  SAP Notes: Check SAP Notes related to the specific OData service or CDS view for any known issues or fixes.
  SAP Community: Engage with the SAP Community forums to see if others have encountered the same issue and what solutions they have found.
  Debugging: If you have access to the backend, consider debugging the service to see how the filters are being processed and where the failure occurs.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.