How To Fix BRAINOLAPAPI119 - MDX statement contains disallowed UNION of two outputs.

SAP Error Message - Details

• Message type: E = Error

• Message class: BRAINOLAPAPI - Message class for OLAP API

• Message number: 119

• Message text: MDX statement contains disallowed UNION of two outputs.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BRAINOLAPAPI119 - MDX statement contains disallowed UNION of two outputs. ?

  The SAP error message BRAINOLAPAPI119 indicates that there is an issue with an MDX (Multidimensional Expressions) query where a UNION operation is being attempted on two sets that are not allowed to be combined. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when working with queries that involve OLAP (Online Analytical Processing) data sources.
  Cause:
  The error arises when the MDX statement attempts to perform a UNION operation on two sets that are incompatible. This can happen due to several reasons:
  
  Incompatible Dimensions: The sets being combined may belong to different dimensions or hierarchies that cannot be merged.
  Different Member Types: The members in the sets may not be of the same type or level, making it impossible to perform a UNION.
  Incorrect Query Logic: The logic of the MDX query may be flawed, leading to an attempt to combine sets that should not be combined.
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Review the MDX Query: Check the MDX statement for any UNION operations. Ensure that the sets being combined are compatible in terms of dimensions and member types.
  
  
  Check Dimensions and Hierarchies: Ensure that the sets you are trying to UNION belong to the same dimension or hierarchy. If they do not, you may need to adjust your query to work within a single dimension.
  
  
  Use INTERSECT or EXCEPT: If the intention is to find common members or exclude certain members, consider using INTERSECT or EXCEPT instead of UNION.
  
  
  Debugging: If possible, break down the MDX query into smaller parts to isolate the issue. Test each part of the query separately to identify where the incompatibility arises.
  
  
  Consult Documentation: Refer to SAP documentation or MDX reference materials for guidance on the correct usage of UNION and other set operations.
  
  
  Seek Help from SAP Community: If the issue persists, consider reaching out to the SAP community forums or support for assistance. Provide them with the specific MDX query and context for better guidance.
  
  
  Related Information:
  
  MDX Basics: Understanding the fundamentals of MDX, including how sets and tuples work, can help in constructing valid queries.
  SAP BW and HANA Documentation: Official SAP documentation provides insights into the limitations and capabilities of MDX in the context of SAP BW and HANA.
  Performance Considerations: Be aware that complex MDX queries can impact performance. Simplifying queries or optimizing them can lead to better performance and fewer errors.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.