How To Fix DT747 - This is not possible in row store

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 747

• Message text: This is not possible in row store

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT747 - This is not possible in row store ?

  The SAP error message DT747 ("This is not possible in row store") typically occurs when you are trying to perform an operation that is not supported in a row store table. This error is often encountered in the context of SAP HANA, where there are two types of data storage: row store and column store. 
  Cause:
  
  Data Storage Type: The operation you are attempting to perform is not compatible with row store tables. Certain features, such as specific types of aggregations or calculations, may only be supported in column store tables.
  Data Model Design: The data model may be designed in a way that requires columnar storage for optimal performance or functionality, and the operation is being attempted on a row store table instead.
  
  Solution:
  
  Change the Table Type: If possible, consider changing the table from row store to column store. This can be done by creating a new column store table and migrating the data from the row store table to the new table.
  Modify the Query: Review the SQL query or operation you are trying to execute. If it involves operations that are not supported in row store, you may need to adjust your approach or use different SQL functions that are compatible with row store.
  Check Documentation: Refer to the SAP HANA documentation for specific limitations and supported operations for row store and column store tables. This can provide insights into what operations can be performed on each type of storage.
  Consult with SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They can provide guidance based on your specific scenario and system configuration.
  
  Related Information:
  
  Row Store vs. Column Store: Understand the differences between row store and column store in SAP HANA. Row store is optimized for transactional workloads, while column store is optimized for analytical workloads.
  Performance Considerations: Be aware of the performance implications of using row store versus column store, especially in terms of data retrieval and processing speed.
  Best Practices: Follow best practices for data modeling in SAP HANA, which may include using column store for analytical queries and aggregations.
  
  By addressing the underlying cause of the error and considering the solutions outlined above, you should be able to resolve the DT747 error in your SAP environment.