How To Fix SDDL_PARSER_MSG420 - Extend on projection view not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 420

• Message text: Extend on projection view not supported

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG420 - Extend on projection view not supported ?

  The SAP error message SDDL_PARSER_MSG420 indicates that there is an issue with extending a projection view in the SAP system. This error typically arises when you attempt to extend a projection view that does not support extensions. Projection views are a specific type of view in SAP that are designed to provide a simplified representation of data, and they have certain limitations regarding modifications and extensions.
  Cause:
  The primary cause of this error is that the projection view you are trying to extend is not designed to allow extensions. In SAP, projection views are often used for performance optimization and data abstraction, and as such, they may have restrictions on how they can be modified or extended.
  Solution:
  To resolve this error, consider the following approaches:
  
  
  Check View Type: Verify if the view you are trying to extend is indeed a projection view. If it is, you will not be able to extend it. You may need to look for an alternative view type that allows extensions.
  
  
  Use a Different View: If you need to extend functionality, consider using a different type of view (e.g., a standard view or a table) that supports extensions.
  
  
  Custom Development: If the existing views do not meet your requirements, you may need to create a custom view or a custom CDS (Core Data Services) view that includes the necessary fields and supports extensions.
  
  
  Consult Documentation: Review the SAP documentation related to the specific projection view you are working with. This may provide insights into its limitations and any potential workarounds.
  
  
  SAP Notes and Support: Check for any relevant SAP Notes or updates that may address this issue. If necessary, reach out to SAP support for assistance.
  
  
  Related Information:
  
  Projection Views: Understand the purpose and limitations of projection views in SAP. They are typically used to optimize performance and simplify data access.
  Core Data Services (CDS): Familiarize yourself with CDS views, which provide a more flexible way to define and extend data models in SAP.
  SAP Development Guidelines: Follow best practices for SAP development, including how to properly extend views and models.
  
  By following these steps, you should be able to address the SDDL_PARSER_MSG420 error and find a suitable solution for your requirements.