How To Fix DT721 - View & cannot be buffered

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 721

• Message text: View & cannot be buffered

What causes this issue?

Selects on the checked view &V1& can return double entries because the
key is not completely defined. The buffer cannot store them because it
first sorts entries to be stored, and this is not possible in this
particular case. As a result, you cannot buffer the view in question if
you want to keep its current definition.

System Response

The technical settings of &V1& are not activated.

How to fix this error?

For an object of View type, the tecnnical settings only include
buffering attributes, but as mentioned, these are meaningless in this
particular case.
Define explicitly that buffering is not permitted for this view or
delete its techncial settings.
You can also include the key fields of the base tables in the view, that
is, you change the view definition itself first. Make sure that the key
fields are at the beginning of the View definition. Buffering is then
possible since the entries that are returned can be sorted because they
are unambiguous.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT721 - View & cannot be buffered ?

  The SAP error message DT721, which states "View & cannot be buffered," typically occurs when you attempt to buffer a database view that is not eligible for buffering. This can happen for various reasons, including the nature of the view itself or the underlying tables involved.
  Cause:
  
  
  Non-Bufferable View: The view may be defined in such a way that it cannot be buffered. This can include:
  
  The view is based on multiple tables.
  The view includes certain types of joins or aggregations.
  The view is defined with certain SQL constructs that prevent buffering.
  
  
  
  Database Constraints: The underlying tables may have constraints or characteristics that prevent the view from being buffered.
  
  
  Technical Settings: The technical settings of the view may not allow for buffering. For example, if the view is defined as a "read-only" view or if it has certain fields that are not suitable for buffering.
  
  
  Solution:
  
  
  Check View Definition: Review the definition of the view in transaction SE11 (Data Dictionary). Ensure that it meets the criteria for buffering. If the view is based on multiple tables or complex joins, consider creating a simpler view or using a different approach.
  
  
  Adjust Technical Settings: If possible, adjust the technical settings of the view to allow for buffering. This may involve changing the view type or modifying the underlying tables.
  
  
  Use Alternative Approaches: If buffering is essential for performance, consider using alternative methods such as:
  
  Creating a database table that stores the required data and can be buffered.
  Using a materialized view or a similar construct if supported by your database.
  
  
  
  Consult Documentation: Refer to SAP documentation or notes related to buffering and views for specific guidelines and best practices.
  
  
  SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support for assistance. They may provide insights based on the specific version of SAP you are using.
  
  
  Related Information:
  
  Buffering Types: Understand the different types of buffering available in SAP (e.g., full buffering, single record buffering) and how they apply to database objects.
  Performance Considerations: Review the performance implications of not buffering certain views and how it may affect your application.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  
  By following these steps, you should be able to diagnose and address the DT721 error effectively.