for geometries indexed into the geo_shape field, it would be helpful to be able to aggregate on the type of geometry.

Example use cases:

(1) for UX-applications that need to present a different UX based on the type-of geometries stored in the index.

• e.g. for styling,
  • show an icon-editor for indices that have points in geo_shape
  • show a fill/outline-editor for indices that have polygons/multipolygons stored.

(2) count/unique counts are especially relevant, but could be appropriate for all aggregations

(3) Similarly, it would be great to be able to specify filters on the data based on geometry-type
- e.g. only query for points for POI-type data.

This would be similar to the ST_GeometryType function in SQL.