title: OData call with $filter and $expand simultaneously
body: <p>I've been trying to call a entity, but i'm supposed to call the results from its associated entities. I tried to do it with the following URL:</p>
  
  <pre><code>/sap/opu/odata/XXXXXXXX/SERVICE_NAME/MatnrGetdetailCollection?$filter=IVendorId eq '1701' and ILanguage eq 'P' and IMaterial eq 'M-05'&amp;$expand=MatnrClassGetdetail
  </code></pre>
  
  <p>I must use the filter because the called function has these mandatory parameters.</p>
  
  <p>Am I making any mistake on the URL or the error isn't there?</p>