How To Fix SADL_EXPOSURE058 - Entity &2 must be root because its base view &1 is root

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_EXPOSURE - Errors During Exposure Compilation

• Message number: 058

• Message text: Entity &2 must be root because its base view &1 is root

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 SADL_EXPOSURE058 - Entity &2 must be root because its base view &1 is root ?

  The SAP error message SADL_EXPOSURE058 indicates that there is an issue with the entity definition in the SAP ABAP programming environment, specifically related to the SAP Data Access Layer (SADL). This error typically arises when there is a mismatch in the hierarchy of entities defined in your CDS (Core Data Services) views.
  Cause:
  The error message states that the entity you are trying to expose (denoted as &2) must be a root entity because its base view (denoted as &1) is already defined as a root entity. In the context of CDS views, a root entity is one that does not have a parent entity. If you attempt to define a child entity based on a root entity, it can lead to this error if the system expects the child entity to also be a root.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Entity Definitions: Review the definitions of the entities involved. Ensure that the entity you are trying to expose (&2) is correctly defined in relation to its base view (&1).
  
  
  Adjust Hierarchy: If &1 is a root entity, you may need to adjust the hierarchy of your entities. You can either:
  
  Change the definition of &2 to make it a root entity if that aligns with your data model.
  Modify the base view or the way you are trying to expose the entity to ensure that the hierarchy is respected.
  
  
  
  Review CDS Annotations: Check the annotations in your CDS views. Ensure that the annotations for the entities are correctly set up to reflect their relationships.
  
  
  Consult Documentation: Refer to the SAP documentation for SADL and CDS views to understand the rules governing entity hierarchies and how to properly define root and child entities.
  
  
  Testing: After making the necessary changes, test the entity exposure again to ensure that the error is resolved.
  
  
  Related Information:
  
  SADL (SAP Data Access Layer): A framework that allows for the creation of data access services in SAP applications.
  CDS Views: Core Data Services are a way to define semantically rich data models in SAP systems, allowing for the creation of database views that can be consumed by various applications.
  Entity Relationships: Understanding the relationships between entities (root and child) is crucial for proper data modeling in SAP.
  
  If you continue to face issues after following these steps, consider reaching out to your SAP support team or consulting the SAP Community for further assistance.