oData developement based on RFC Time management standard BAPI

Dear experts,

I am exploring Gateway service possiblities by trying to implement an oData service based on RFC. I have choosen a BAPI from R/3 Time Management which isBAPI_EMPATTABS_GETLIST.

That standard BAPI provides time details according to given import parameters (FROM_DATE and TO_DATE) as shown :

I have successfully gone through those steps :

• 1 - Create a project
• 2 - Import data model from RFC BAPI_EMPATTABS_GETLIST
• 3 - Select data source parameters :

Question #1 : is this the correct way to proceed to select both HRTIMESREC_LIST[] and import parameters FROM_DATE and TO_DATE?

Question #2 : what if I would like to use the SEL_EMPLOYEE[] range parameters as well? It seems to create an extra Entity type...

• 4 - Set DOCUMENTNUMER as key :

• 5 - Define default entity set :

• 6 - Define the mapping setting FROM_DATE and TO_DATE as INPUT parameters:

Question #3 : do those parameters allow me to make a ....?filter$fromdate='20151010' post on the base service URL?

• 7 - Generating gives no error : so far so good!
• 8 - Testing with Gateway client gives no result

Any advice?

Thanks,

J.