How To Fix DD_CDS_ANALYSIS305 - View &1: Recursive View Definitions are not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: DD_CDS_ANALYSIS - CDS code inspector messages

• Message number: 305

• Message text: View &1: Recursive View Definitions are not supported

What causes this issue?

By building CDS Views on top each other, a directed acyclic graph is
being build. But it is not possible to build a graph containing cycles
using view. Say, a view cannot read data from itself. neither directly
nor indirectly.
The recursive dependency for the view &V1& is as follows: &V2&

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DD_CDS_ANALYSIS305 - View &1: Recursive View Definitions are not supported ?

  The SAP error message DD_CDS_ANALYSIS305 indicates that there is a problem with a Core Data Services (CDS) view definition in your SAP system. Specifically, the error states that "Recursive View Definitions are not supported," which means that the CDS view you are trying to create or use is referencing itself directly or indirectly, leading to a recursive loop.
  Cause:
  
  Self-Referencing Views: The CDS view is defined in such a way that it references itself, either directly or through another view that eventually leads back to the original view.
  Circular Dependencies: There may be a chain of views where one view references another, which in turn references the first view, creating a circular dependency.
  
  Solution:
  
  Review the View Definition: Check the definition of the CDS view that is causing the error. Look for any self-references or circular references in the SQL-like definition of the view.
  Refactor the View: If you find that the view is self-referencing, you will need to refactor the view to eliminate the recursive definition. This may involve:
  
  Breaking the view into multiple views that do not reference each other.
  Using different logic to achieve the desired result without recursion.
  
  
  Use Alternative Approaches: If the logic you are trying to implement requires recursion, consider using other methods such as:
  
  ABAP code to handle the logic instead of a CDS view.
  Using database procedures or functions if applicable.
  
  
  Testing: After making changes, test the view to ensure that it works as expected and does not produce the same error.
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) is a framework for defining semantically rich data models in SAP. It allows for the creation of views that can be consumed by various applications.
  Documentation: Refer to the official SAP documentation for CDS views to understand the best practices and limitations regarding view definitions.
  SAP Notes: Check SAP Notes and Knowledge Base Articles for any specific issues or updates related to the error message DD_CDS_ANALYSIS305.
  
  By following these steps, you should be able to resolve the error and successfully define your CDS view without recursive definitions.