How To Fix RS_HCPR_MODEL135 - CompositeProvider &1 with union part not allowed as right join partner

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_HCPR_MODEL - Messages related to the HANA Composite Provider Backend

• Message number: 135

• Message text: CompositeProvider &1 with union part not allowed as right join partner

Self-Explanatory Message

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• What is the cause and solution for SAP error message RS_HCPR_MODEL135 - CompositeProvider &1 with union part not allowed as right join partner ?

  The SAP error message RS_HCPR_MODEL135 indicates that there is an issue with the definition of a CompositeProvider in SAP BW/4HANA or SAP BW on HANA. Specifically, the error states that a union part is not allowed as a right join partner in the CompositeProvider.
  Cause:
  This error typically arises when you are trying to create a CompositeProvider that includes a union operation, and you are attempting to use that union as a right join partner. In SAP BW, certain restrictions apply to how unions and joins can be combined in CompositeProviders. A union cannot be used as a right join partner because it does not have a defined structure that can be matched with the right join requirements.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Change the Join Type: If possible, change the right join to a left join or an inner join. This may involve rethinking the data model and how the data is combined.
  
  
  Reorganize the CompositeProvider: If the union is essential, consider restructuring your CompositeProvider. You might need to separate the union from the join logic or create a different CompositeProvider that handles the union and then join that result with other data sources.
  
  
  Use a Different Data Source: If the union is not strictly necessary, consider using a different data source that can be joined without the union.
  
  
  Check the Data Model: Review the data model to ensure that the CompositeProvider is designed correctly. Ensure that the fields being joined are compatible and that the data types match.
  
  
  Consult Documentation: Refer to the SAP BW/4HANA documentation for CompositeProviders to understand the limitations and best practices for using unions and joins.
  
  
  Related Information:
  
  CompositeProvider: A CompositeProvider is a virtual data model in SAP BW that allows you to combine data from different sources, including InfoProviders, other CompositeProviders, and more.
  Join Types: Understand the different types of joins (inner, left outer, right outer) and how they affect the data retrieval process.
  SAP Notes: Check for any relevant SAP Notes or updates that may address this specific error or provide additional guidance on CompositeProvider design.
  
  By following these steps, you should be able to resolve the RS_HCPR_MODEL135 error and successfully configure your CompositeProvider.