How To Fix SDDL_PARSER_MSG402 - Only CDS view entities are allowed as basis entities for projection views

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 402

• Message text: Only CDS view entities are allowed as basis entities for projection views

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG402 - Only CDS view entities are allowed as basis entities for projection views ?

  The SAP error message SDDL_PARSER_MSG402 indicates that you are trying to create a projection view using a basis entity that is not a Core Data Services (CDS) view. In SAP, projection views are designed to be based on CDS views, which are a specific type of data model that allows for the definition of semantically rich data models in a database-agnostic way.
  Cause:
  The error occurs when:
  
  You attempt to create a projection view using a table or a non-CDS view as the basis entity.
  The entity you are trying to use does not meet the requirements of being a CDS view.
  
  Solution:
  To resolve this error, you should ensure that the basis entity for your projection view is a valid CDS view. Here are the steps you can take:
  
  
  Check the Basis Entity: Verify that the entity you are using as the basis for your projection view is indeed a CDS view. You can do this by checking the definition of the entity in the ABAP Development Tools (ADT) or in the SAP GUI.
  
  
  Create a CDS View: If the basis entity is not a CDS view, you will need to create a CDS view that encapsulates the data you need. This can be done using the following steps:
  
  Open the ABAP Development Tools (ADT) in Eclipse.
  Create a new CDS view by right-clicking on your package and selecting New > Other ABAP Repository Object > Core Data Services > Data Definition.
  Define your CDS view using the appropriate SQL-like syntax.
  
  
  
  Use the Correct Entity: Once you have a valid CDS view, use it as the basis entity for your projection view.
  
  
  Check for Dependencies: Ensure that any dependencies or associations required by your projection view are correctly defined in the CDS view.
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) is a framework that allows you to define semantic data models in SAP. CDS views can be used to create complex data models that can be consumed by various applications.
  Projection Views: These are a type of CDS view that allows you to select specific fields from a basis entity, effectively creating a new view that contains only the necessary data.
  Documentation: Refer to the official SAP documentation on CDS views and projection views for more detailed information on how to create and manage these entities.
  
  By following these steps and ensuring that you are using a valid CDS view as the basis for your projection view, you should be able to resolve the error message SDDL_PARSER_MSG402.