Batch service passing multiple values as filters

Hi,

Service call : /sap/opu/odata/sap/ZEMPS_SRV/$batch

My request is

--batch

Content-Type: application/http

Content-Transfer-Encoding: binary

Accept: application/xml

GET ztotal_EmpSet/?$filter= StartDate+eq+'24.08.2016 00:00:00'+and+EndDate+eq+'28.08.2016 23:00:00'+and+Unit+eq+'50006636'+and+DateField+eq+'BASIC'+and+Id+eq+'EMP1' HTTP/1.1

--batch--

The debugger is going into the get_entityset method, but

it_filter_select_option is empty.

How do I get these filter values?

Regards,

Gopa