How To Fix RS_DB_DB6521 - PSA is column-organized, no MDC check

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_DB_DB6 - DB6-Specific Messages in SAP BW

• Message number: 521

• Message text: PSA is column-organized, no MDC check

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RS_DB_DB6521 - PSA is column-organized, no MDC check ?

  The SAP error message RS_DB_DB6521 indicates that there is an issue related to the Persistent Staging Area (PSA) in SAP BW (Business Warehouse) when dealing with column-organized tables. This error typically arises when there is an attempt to perform a Multi-Dimensional Compression (MDC) check on a PSA that is organized in a columnar format, which is not supported.
  Cause:
  
  Column-Organized Table: The PSA is set up as a column-organized table, which is optimized for analytical queries but does not support certain operations that are available for row-organized tables.
  MDC Check Attempt: The system is trying to perform an MDC check on the PSA, which is not applicable for column-organized tables.
  
  Solution:
  
  Review Table Structure: Check the structure of the PSA and confirm that it is indeed set up as a column-organized table. If it is not intended to be column-organized, consider changing its structure.
  Avoid MDC Checks: If the PSA is correctly set up as a column-organized table, ensure that any processes or queries that are attempting to perform MDC checks on this table are modified to avoid this operation.
  Data Modeling: If you are using a data model that requires MDC checks, consider using a row-organized table instead for the PSA, as this will allow for the necessary operations.
  SAP Notes and Documentation: Check for any relevant SAP Notes or documentation that may provide additional context or updates regarding this error. SAP frequently updates its systems, and there may be patches or notes that address this specific issue.
  
  Related Information:
  
  Column-Organized vs. Row-Organized Tables: Understand the differences between these two types of table organization in SAP HANA and how they affect data processing and performance.
  SAP BW/4HANA: If you are using SAP BW/4HANA, familiarize yourself with the best practices for data modeling and the use of PSAs in a columnar database environment.
  Performance Considerations: Column-organized tables are optimized for read-heavy operations, while row-organized tables are better for write-heavy operations. Choose the appropriate structure based on your use case.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.