How To Fix DA644 - Table & change von Row to Column Store; DB version already correct

SAP Error Message - Details

• Message type: E = Error

• Message class: DA - Dictionary: Compare, distribution, timer, instantiation

• Message number: 644

• Message text: Table & change von Row to Column Store; DB version already correct

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DA644 - Table & change von Row to Column Store; DB version already correct ?

  The SAP error message DA644 indicates an issue related to the database table storage format, specifically when trying to change a table from row store to column store in SAP HANA. The message suggests that the database version is already correct, which means that the underlying database supports the desired storage format, but there may be other issues preventing the change.
  Cause:
  
  Incompatible Table Structure: The table may have certain characteristics or constraints that prevent it from being converted from row store to column store.
  Existing Data: If the table contains data that is not compatible with column store format, the conversion will fail.
  Database Configuration: There may be settings or configurations in the database that are not aligned with the requirements for column store tables.
  SAP Version: The version of SAP you are using may have specific limitations or bugs related to table conversion.
  
  Solution:
  
  Check Table Characteristics: Review the table structure and ensure that it does not have any incompatible features (e.g., certain data types, primary keys, or foreign keys).
  Data Migration: If the table contains data, consider exporting the data, dropping the table, and then recreating it as a column store table before re-importing the data.
  Database Settings: Verify the database settings and configurations to ensure they are appropriate for column store tables.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that address this specific error message or related issues.
  Consult Documentation: Review the SAP HANA documentation for guidelines on converting tables from row store to column store, as it may provide specific steps or requirements.
  Testing in Development: If possible, replicate the issue in a development environment to test different approaches without affecting production data.
  
  Related Information:
  
  SAP HANA Documentation: Refer to the official SAP HANA documentation for detailed information on table storage formats and conversion processes.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurs.
  
  By following these steps, you should be able to identify the cause of the DA644 error and implement a suitable solution.