How To Fix RSQBW423 - Only one outer join is permitted

SAP Error Message - Details

• Message type: E = Error

• Message class: RSQBW -

• Message number: 423

• Message text: Only one outer join is permitted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSQBW423 - Only one outer join is permitted ?

  The SAP error message RSQBW423, which states "Only one outer join is permitted," typically occurs in the context of SAP BW (Business Warehouse) when you are trying to create a query that involves multiple outer joins in a single query definition. This limitation is due to the way SAP BW handles joins in its data models.
  Cause:
  The error is triggered when:
  
  You attempt to create a query that includes more than one outer join between InfoObjects or between InfoProviders.
  The query is trying to fetch data from multiple sources where the relationships are defined with outer joins, which is not supported in the current context.
  
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Limit Outer Joins: 
  
  Review your query design and try to limit the number of outer joins to just one. This may involve restructuring your query or the underlying data model.
  
  
  
  Use Inner Joins: 
  
  If possible, replace outer joins with inner joins. This may require a change in how you want to retrieve data, but it can help you avoid the error.
  
  
  
  Create a Composite Provider: 
  
  If you need to combine data from multiple sources with outer joins, consider creating a Composite Provider. This allows you to define a more complex data model that can handle multiple outer joins.
  
  
  
  Use a Data Flow: 
  
  Instead of trying to handle everything in the query, you can create a data flow that pre-joins the necessary tables and then use that as the basis for your query.
  
  
  
  Check Query Design: 
  
  Review the query design in the Query Designer. Ensure that the joins are set up correctly and that you are not inadvertently creating multiple outer joins.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or community forums for specific guidance on your version of SAP BW, as there may be version-specific considerations or updates.
  
  
  
  Related Information:
  
  SAP BW Documentation: Check the official SAP Help Portal for detailed documentation on query design and join limitations.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Performance Considerations: Be aware that using outer joins can impact performance, so always consider the efficiency of your queries.
  
  By following these steps, you should be able to resolve the RSQBW423 error and successfully create your query in SAP BW.