How To Fix SDDL_PARSER_MSG100 - Extension of a view with UNION or UNION ALL is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 100

• Message text: Extension of a view with UNION or UNION ALL is not possible

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG100 - Extension of a view with UNION or UNION ALL is not possible ?

  The SAP error message SDDL_PARSER_MSG100 indicates that there is an issue with extending a view that uses a UNION or UNION ALL operation. This error typically arises when you attempt to extend a view that is defined with these operations, which are not supported for view extensions in SAP.
  Cause:
  The primary cause of this error is that SAP does not allow the extension of views that are created using UNION or UNION ALL. This is due to the complexity and potential ambiguity that can arise from combining multiple data sources in this manner. When a view is defined with a UNION, it combines the results of two or more SELECT statements, and extending such views can lead to complications in data integrity and structure.
  Solution:
  To resolve this error, consider the following approaches:
  
  
  Avoid Using UNION/UNION ALL: If possible, redesign the view to avoid using UNION or UNION ALL. Instead, you can create separate views for each data source and then use them in your application logic as needed.
  
  
  Create a New View: If you need to extend the functionality of the existing view, consider creating a new view that combines the necessary fields from the original view and any additional fields you need. This new view should not use UNION or UNION ALL.
  
  
  Use a Different Approach: Depending on your requirements, you might be able to achieve the desired results using other SQL constructs or by restructuring your data model.
  
  
  Check SAP Notes: Always check the SAP Notes and Knowledge Base for any updates or specific recommendations related to this error. There may be patches or updates that address this issue.
  
  
  Consult Documentation: Review the SAP documentation for the specific version you are using to understand the limitations and best practices for creating and extending views.
  
  
  Related Information:
  
  SAP HANA: If you are using SAP HANA, be aware that it has its own set of rules and limitations regarding views and their extensions.
  Performance Considerations: When redesigning views, consider the performance implications of your changes, especially if the views are used in high-traffic areas of your application.
  Testing: After making changes, thoroughly test the new or modified views to ensure they meet your business requirements and perform as expected.
  
  By following these guidelines, you should be able to address the SDDL_PARSER_MSG100 error effectively.