How To Fix DA479 - Error in ALTER TABLE generation for table &

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 479

• Message text: Error in ALTER TABLE generation for table &

What causes this issue?

This error message indicates that internal inconsistencies exist.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please consult SAP.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DA479 - Error in ALTER TABLE generation for table & ?

  The SAP error message DA479, which states "Error in ALTER TABLE generation for table &," typically occurs during database operations, particularly when there are issues with the generation of the ALTER TABLE statement for a specific database table. This error can arise due to various reasons, including:
  Causes:
  
  Database Locking Issues: The table may be locked by another process, preventing the ALTER TABLE command from executing.
  Syntax Errors: There may be a syntax error in the generated SQL statement, which can happen if there are issues with the table definition or constraints.
  Database Constraints: Existing constraints on the table may conflict with the changes being made.
  Insufficient Authorizations: The user executing the command may not have the necessary permissions to alter the table.
  Database Corruption: In rare cases, there may be corruption in the database that prevents the operation from completing successfully.
  Incompatible Data Types: If the changes involve altering data types, there may be incompatibilities with existing data.
  
  Solutions:
  
  Check Locks: Use transaction codes like SM12 to check for locks on the table and release them if necessary.
  Review SQL Statement: If possible, review the generated SQL statement for any syntax errors or issues. You can often find this in the system logs or by enabling SQL trace.
  Check Constraints: Review the existing constraints on the table to ensure that the changes you are trying to make do not violate any of them.
  User Authorizations: Ensure that the user has the necessary authorizations to perform the ALTER TABLE operation.
  Database Consistency Check: Run a consistency check on the database to identify and resolve any corruption issues.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SM21 (System Log) to help diagnose and resolve the issue.
  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 occurred.
  Documentation: Review the SAP documentation related to database operations and table management for best practices and troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the DA479 error and implement a solution to resolve it.