What is CDS projection view in SAP BC-ESI-RAP - RESTful ABAP Programming Model?

SAP Term: CDS projection view

• Component: BC-ESI-RAP

• Component Name: RESTful ABAP Programming Model

• Description: Result of CDS view projection. A CDS projection is defined in a data definition in which you can define the service-specific projected data model, a subset of the data model of the general business object.

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• Key Concepts: 
  CDS projection view is a type of view in the BC-ESI-RAP RESTful ABAP Programming Model. It is used to project data from one or more CDS entities into a single view. This view can then be used to access the data from the CDS entities in a structured way. 
  
  How to use it: 
  To create a CDS projection view, you must first define the CDS entities that you want to project. Then, you must define the projection view itself, which includes specifying the columns and their data types. Finally, you must define the mapping between the CDS entities and the projection view. Once this is done, you can use the projection view to access the data from the CDS entities in a structured way. 
  
  Tips & Tricks: 
  When creating a CDS projection view, it is important to ensure that all of the columns in the projection view are mapped correctly to their corresponding CDS entities. This will ensure that all of the data is correctly projected into the view. Additionally, it is important to ensure that all of the columns in the projection view have compatible data types with their corresponding CDS entities. 
  
  Related Information: 
  For more information on how to create a CDS projection view, please refer to SAP Help documentation on BC-ESI-RAP RESTful ABAP Programming Model. Additionally, there are many online tutorials available that provide step-by-step instructions on how to create a CDS projection view.