Support OData Groupping Agregates Rollup
Support in Asp.Net Web Api OData for Groupping Agregates Rollup...
If this feature is of interest to you then please vote here and also make a request through the Issue Tracker at http://odata.codeplex.com as this would need to be implemented first in ODataLib.
João Vitor Paes de Barros do Carmo commented
Created as suggested: https://odata.codeplex.com/workitem/9