Parameter field in RAP ABAP Application

[NR_Ranasingh]

Hi Experts ,

I want to have an Input field on RAP Application (like Paramter in Reports).

I have a root Entity(I_Cust) and child entity(I_inv) , which are consumed via C_Cust and C_Inv and exposed via metadata extension and its a managed behavior implementation.

I need to add a Parameter field Prate, like the filter fields, but it should work as Input field only not filter .This Field P_Rate will be used inside consumption CDS for calculating one of the Output field value(ex-amount).

Parameterized CDS are not supproted in Service Pubilish .

any suggestion .