Fetch data based on input in OData service

Hi everyone,

I created BAPI to fetch sales details of a given customer.

Import parameter

   CUST_NO

Export Parameter

   RETURN

Tables:  SALES_TAB   (Table having 4 columns given below)

                *  SO_NO

                *  SO_DATE

                *  NET_VALUE

                *  CURRENCY

BAPI working fine.

Now I want to create a OData service by importing the above BAPI function.

I have little confusion while selecting the fields to create a model.

I want to take RETURN structure also.

Another question is do I need to go with GetEntity (Read) or GetEntitySet (Query) for my above BAPI.

Please help.

Ravinder.