DDLS464 - View must not be extended: extends are not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 464

• Message text: View must not be extended: extends are not allowed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS464 - View must not be extended: extends are not allowed ?

  The SAP error message DDLS464 indicates that you are trying to extend a database view in a way that is not permitted. This typically occurs when you attempt to modify a view that has been defined in a way that does not allow for extensions. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  
  View Definition: The view you are trying to extend is defined in such a way that it does not allow extensions. This could be due to the use of certain SQL constructs or the way the view is structured.
  System Restrictions: Some views are system-defined or are part of standard SAP applications, and SAP restricts modifications to these views to maintain data integrity and consistency.
  Database Constraints: The underlying database may have constraints that prevent the extension of the view.
  
  Solution
  
  Check View Definition: Review the definition of the view to understand why it cannot be extended. Look for any specific clauses or constructs that might be causing the restriction.
  Create a New View: If you need to add additional fields or logic, consider creating a new view that includes the original view as a base. You can do this by selecting from the original view and adding the necessary fields or joins.
  Use a Projection: If you only need a subset of the fields, consider creating a projection view instead of trying to extend the existing view.
  Consult Documentation: Refer to SAP documentation or the ABAP Dictionary to understand the limitations and best practices for working with views.
  Check for Authorizations: Ensure that you have the necessary authorizations to modify views in the system.
  
  Related Information
  
  SAP Notes: Check SAP Notes for any specific guidance or updates related to the error message DDLS464.
  ABAP Dictionary: Familiarize yourself with the ABAP Dictionary and how views are managed within it.
  Database Documentation: If you are using a specific database (like HANA, Oracle, etc.), consult the database documentation for any specific limitations regarding views.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they have found.
  
  By following these steps, you should be able to address the DDLS464 error and find a suitable approach to achieve your requirements without violating the constraints of the existing view.