code: @Override
      protected void bindAggregationSpecificKeyParameters(
              TypedQuery<PortletExecutionAggregationImpl> query,
              Set<PortletExecutionAggregationKey> keys) {
          query.setParameter(this.portletMappingParameter, extractAggregatePortletMappings(keys));
          query.setParameter(this.executionTypeParameter, extractExecutionTypes(keys));
      }
docs: The execution type is obtained from the first PortletExecutionAggregationKey.