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ABENCDS_ENTITY_KEY - CDS ENTITY KEY

The key elements of a CDS entity do not define unique lines in its result with regard to the key. An application or framework accessing a CDS entity must expect duplicate entries for the key fields in the result set. If the lines of a result set should be unique in respect to a set of key elements, it is the task of the application or framework that provides the CDS entity to define them appropriately and to document the view accordingly.