i have some SimpleFeature

        SimpleFeatureTypeBuilder sftb = new SimpleFeatureTypeBuilder();
        sftb.setName("PointSimpleFeatureType");
        sftb.add("name",String.class);
        sftb.add("area", Integer.class);
        sftb.add("the_geom", Geometry.class);

and i use geowave wirte this SimleFeature to HBase, and i query the Statistics, and i only get the histogram about area field, and can i quickly get the sum and average?
If i can't get through Statistics, is there any other way?