How To Fix RSUOM163 - Secondary index on SID columns activated (table &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: RSUOM - BW: Conversion of Units of Measure

• Message number: 163

• Message text: Secondary index on SID columns activated (table &1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSUOM163 - Secondary index on SID columns activated (table &1) ?

  The SAP error message RSUOM163 indicates that a secondary index on SID (Surrogate ID) columns has been activated for a specific table. This message typically arises in the context of SAP BW (Business Warehouse) or SAP HANA environments, where performance optimization and data retrieval efficiency are critical.
  Cause:
  The error message RSUOM163 is triggered when:
  
  A secondary index on SID columns is activated for a table that is not designed to support it.
  The system may have detected that the secondary index is not necessary or could lead to performance issues.
  There may be a configuration or design issue in the data model that needs to be addressed.
  
  Solution:
  To resolve the RSUOM163 error, consider the following steps:
  
  
  Check the Table Design: Review the design of the table in question. Ensure that the use of a secondary index on SID columns is appropriate for your data model.
  
  
  Deactivate the Secondary Index: If the secondary index is not needed, you can deactivate it. This can typically be done through the Data Warehousing Workbench (transaction RSA1) or by using the appropriate database management tools.
  
  
  Analyze Performance: If the secondary index is necessary for performance reasons, analyze the performance of your queries and data loads. You may need to optimize your data model or queries instead of relying on the secondary index.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific table and its indexing strategy. There may be specific recommendations or best practices for handling SID columns.
  
  
  Check for SAP Notes: Look for any relevant SAP Notes that may address this issue. SAP frequently releases notes that provide fixes or workarounds for known issues.
  
  
  Engage with SAP Support: If the issue persists or if you are unsure about the implications of deactivating the index, consider reaching out to SAP Support for guidance.
  
  
  Related Information:
  
  SID Columns: SID columns are used in SAP BW to uniquely identify master data records. They are crucial for performance in data retrieval and reporting.
  Secondary Indexes: Secondary indexes can improve query performance but may also introduce overhead during data loading and maintenance. It's essential to balance the use of indexes based on the specific use case.
  Performance Tuning: Regularly monitor and tune the performance of your BW system, especially after significant changes to the data model or volume of data.
  
  By following these steps, you should be able to address the RSUOM163 error effectively.