How To Fix R7679 - Attribute &1 with high card. must not be used as navigation attr. in &2

SAP Error Message - Details

• Message type: E = Error

• Message class: R7 - BW: Data basis

• Message number: 679

• Message text: Attribute &1 with high card. must not be used as navigation attr. in &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message R7679 - Attribute &1 with high card. must not be used as navigation attr. in &2 ?

  The SAP error message R7679 indicates that an attribute with a high cardinality is being used as a navigation attribute in a data model, which is not allowed. High cardinality attributes are those that have a large number of unique values, such as customer IDs or transaction numbers. Using such attributes for navigation can lead to performance issues and inefficiencies in data processing.
  Cause:
  The error occurs when:
  
  An attribute that has a high number of unique values is defined as a navigation attribute in a data model (e.g., InfoObject, InfoCube, or CompositeProvider).
  The system is trying to use this attribute for navigation in queries or reports, which is not recommended due to potential performance degradation.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify the Attribute: Determine which attribute is causing the issue. The error message will specify the attribute name (&1) and the object name (&2) where the issue is occurring.
  
  
  Change Attribute Settings:
  
  Remove Navigation Attribute: If the attribute is not essential for navigation, consider removing it from the navigation attributes list in the data model.
  Use a Different Attribute: If possible, replace the high cardinality attribute with a lower cardinality attribute that can serve the same purpose for navigation.
  
  
  
  Review Data Model Design: 
  
  Assess the overall design of your data model. Ensure that high cardinality attributes are used appropriately and that they are not being used in contexts where they can cause performance issues.
  Consider creating a new attribute that aggregates or categorizes the high cardinality attribute into a lower cardinality form.
  
  
  
  Consult Documentation: Review SAP documentation or guidelines regarding the use of navigation attributes and high cardinality attributes to ensure compliance with best practices.
  
  
  Testing: After making changes, test the data model to ensure that it functions correctly without the error and that performance is acceptable.
  
  
  Related Information:
  
  High Cardinality: Refers to attributes that have a large number of distinct values. Examples include user IDs, transaction IDs, etc.
  Navigation Attributes: Attributes that are used to filter or drill down in reports and queries. They should ideally have a lower cardinality to ensure efficient data retrieval.
  Performance Considerations: Using high cardinality attributes for navigation can lead to slow query performance and increased resource consumption.
  
  By following these steps, you should be able to resolve the R7679 error and optimize your SAP data model for better performance.