How To Fix CFD_REGISTRY_CHECK157 - Chosen View Type not allowed for CDS View with aggregation via Group By

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_REGISTRY_CHECK - Custom Fields: Messages for Registry Check

• Message number: 157

• Message text: Chosen View Type not allowed for CDS View with aggregation via Group By

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 CFD_REGISTRY_CHECK157 - Chosen View Type not allowed for CDS View with aggregation via Group By ?

  The SAP error message CFD_REGISTRY_CHECK157 indicates that there is an issue with the chosen view type for a Core Data Services (CDS) view that uses aggregation via the GROUP BY clause. This error typically arises when the view type selected is not compatible with the aggregation logic defined in the CDS view.
  Cause:
  The error occurs when:
  
  You are trying to use a view type that does not support aggregation. For example, if you are trying to create a projection view or a simple view that does not allow for aggregated data.
  The CDS view is defined with aggregation (using GROUP BY), but the view type selected (like a basic view) does not support this aggregation.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the View Type: Ensure that you are using an appropriate view type that supports aggregation. For example, you should use a @AbapCatalog.sqlViewName annotation with a view type that allows for aggregation, such as a @AbapCatalog.sqlViewType: #CUBE or @AbapCatalog.sqlViewType: #DIMENSION.
  
  
  Modify the CDS View: If you need to perform aggregation, ensure that your CDS view is defined correctly. You may need to adjust the annotations or the structure of the view to ensure it is compatible with the aggregation logic.
  
  
  Review the Aggregation Logic: Make sure that the aggregation logic in your CDS view is correctly defined. Check the fields being aggregated and ensure that they are compatible with the view type you are using.
  
  
  Use the Correct Annotations: Ensure that you are using the correct annotations for your CDS view. For example, if you are creating a view that is meant to be used for reporting and includes aggregated data, you should use the appropriate annotations to define it as such.
  
  
  Test with Different View Types: If you are unsure which view type to use, you can test with different types to see which one resolves the error. 
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) views are a way to define semantic data models in SAP. They allow for complex data retrieval and can include features like aggregation, associations, and annotations.
  Aggregation in CDS: When using aggregation in CDS views, it is important to understand how to use the GROUP BY clause and how it interacts with the selected fields.
  SAP Documentation: Refer to the official SAP documentation for CDS views to understand the different view types and their capabilities.
  
  By following these steps, you should be able to resolve the CFD_REGISTRY_CHECK157 error and successfully create your CDS view with the desired aggregation.