presto-geospatial/src/main/java/io/prestosql/plugin/geospatial/SpatialPartitioningAggregateFunction.java/SpatialPartitioningAggregateFunction/output
class SpatialPartitioningAggregateFunction:    @OutputFunction(StandardTypes.VARCHAR)
    public static void output(SpatialPartitioningState state, BlockBuilder out)
    {
        throw new UnsupportedOperationException("spatial_partitioning(geometry) aggregate function should be re-written into spatial_partitioning(geometry, partitionCount)");
    }