Count Field in Odata service

Hello All,

I have one entityset -  ResourceSet. I am sending Resources List in this set. Along with this I need to send the total count of resources in the list , in a separate field. I need to pas this number to UI5 App.

I have created a BAPI , which gives the output as Resources Table and one export parameter RCOUNT ( which has the resources Count)

When I map this to query operation how ever how to map this global field ?

Regards,

Sheetal