How To Fix CL_SADL_GW_MDE_MSGX009 - Filter sign & is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: CL_SADL_GW_MDE_MSGX - texts for parser

• Message number: 009

• Message text: Filter sign & is unknown

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CL_SADL_GW_MDE_MSGX009 - Filter sign & is unknown ?

  The SAP error message CL_SADL_GW_MDE_MSGX009 with the description "Filter sign & is unknown" typically occurs in the context of using the SAP Gateway and the SADL (SAP ABAP Programming Model for SAP Fiori) framework. This error indicates that there is an issue with the filter criteria being used in a query, specifically that the filter sign (e.g., '=', '<>', '>', '<', etc.) is not recognized or is invalid.
  Cause:
  
  Invalid Filter Sign: The filter sign used in the query is not one of the expected values. This can happen if the filter is constructed incorrectly in the code or if the input parameters are not validated properly.
  Data Type Mismatch: The filter sign may be valid, but it is being applied to a field that does not support that operation due to a data type mismatch.
  Configuration Issues: There may be issues with the configuration of the OData service or the underlying data model that prevent the filter from being processed correctly.
  
  Solution:
  
  Check Filter Sign: Review the code or the query where the filter is being applied. Ensure that the filter sign is one of the recognized values (e.g., '=', '<>', '>', '<', etc.).
  Validate Input Parameters: If the filter sign is being dynamically generated or passed as a parameter, ensure that it is validated before being used in the query.
  Review Data Model: Check the data model and ensure that the fields being filtered support the operations being applied. For example, ensure that numeric comparisons are not being applied to string fields.
  Debugging: Use debugging tools to trace the execution of the code and identify where the invalid filter sign is being introduced.
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand the expected filter signs and their usage in the context of SADL and OData services.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  OData Service Documentation: Review the documentation for the OData service you are using to understand the expected filter syntax and capabilities.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.