In CDS view entities>, it is now possible to reuse expressions defined in the SELECT> list in other operand positions of the same CDS view entity by using the syntax $projection.reuse_exp>>.
The new statement EXTEND ABSTRACT ENTITY>> of the DDL of ABAP CDS makes it possible to add new elements to existing CDS abstract entities> by using CDS abstract entity extensions>.
ABAP_MODIFICATION_NN CDS View Entity, Handling of Amounts and Quantities>
In CDS view entities>, special handling for CDS amount fields> and CDS quantity fields> has been implemented. It differs from the handling of amount fields and quantity fields in DDIC, for example, more data types are possible and the currency key/unit key reference is considered in expressions. Moreover, a new type is available: the CDS calculated quantity>. A CDS calculated quantity is the result type of a calculation using amount and/or quantity fields.
ABAP_MODIFICATION_NN New CDS System Entities to Generate Series >
The following new CDS system table functions> are available: