How To Fix RSTRAN_DB026 - InfoObject '&1' with high cardinality is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: RSTRAN_DB - message for RSTRAN_DB

• Message number: 026

• Message text: InfoObject '&1' with high cardinality is not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSTRAN_DB026 - InfoObject '&1' with high cardinality is not supported ?

  The SAP error message RSTRAN_DB026 indicates that an InfoObject has high cardinality, which means it has a large number of unique values. This can lead to performance issues or limitations in certain operations within SAP BW (Business Warehouse) or SAP HANA environments.
  Cause:
  The error typically arises when:
  
  An InfoObject is defined with a high cardinality (e.g., a characteristic that can take on many different values).
  The system is trying to perform a transformation or data load operation that does not support high cardinality InfoObjects.
  The InfoObject is being used in a context (like a data source or transformation) that cannot handle the volume of unique values efficiently.
  
  Solution:
  To resolve the RSTRAN_DB026 error, consider the following approaches:
  
  
  Review the InfoObject Definition:
  
  Check the InfoObject's properties and ensure that it is necessary to have such high cardinality. If possible, consider redesigning the InfoObject to reduce its cardinality.
  
  
  
  Use Aggregates:
  
  If the InfoObject is used in reporting, consider creating aggregates that summarize the data instead of using the high cardinality InfoObject directly.
  
  
  
  Change Data Model:
  
  If the InfoObject is not essential for the transformation, consider changing the data model to avoid using it in the transformation process.
  
  
  
  Partitioning:
  
  If applicable, partition the data to manage high cardinality more effectively. This can help in improving performance and avoiding the error.
  
  
  
  Data Source Modification:
  
  If the InfoObject is part of a data source, consider modifying the data source to limit the number of unique values being processed.
  
  
  
  Consult Documentation:
  
  Review SAP documentation for any specific limitations or recommendations regarding high cardinality InfoObjects in your version of SAP BW or HANA.
  
  
  
  SAP Notes:
  
  Check for any relevant SAP Notes that might address this specific error or provide patches or updates that could resolve the issue.
  
  
  
  Related Information:
  
  Cardinality: In database terminology, cardinality refers to the uniqueness of data values contained in a particular column (attribute) of a database table.
  Performance Considerations: High cardinality can lead to performance degradation in reporting and data processing. It is essential to manage high cardinality InfoObjects carefully.
  SAP BW/4HANA: If you are using SAP BW/4HANA, be aware of the specific limitations and capabilities of the system regarding high cardinality InfoObjects.
  
  By following these steps, you should be able to address the RSTRAN_DB026 error effectively. If the problem persists, consider reaching out to SAP support for further assistance.