```
SELECT *
FROM system.dictionaries
WHERE name LIKE 'XXXX%'

Row 1:
──────
database:                    default
name:                        XXXX_dict
uuid:                        00000000-0000-0000-0000-000000000000
status:                      LOADED
origin:                      default.XXXX_dict
type:                        Polygon
key:                         (Array(Array(Array(Array(Float64)))))
attribute.names:             ['name','id']
attribute.types:             ['String','String']
bytes_allocated:             0
query_count:                 0
hit_rate:                    1
element_count:               433731
load_factor:                 1
source:                      ClickHouse: default.XXXX
lifetime_min:                60
lifetime_max:                1800
loading_start_time:          2021-03-11 00:07:52
last_successful_update_time: 2021-03-11 00:08:24
loading_duration:            31.595
last_exception:
```
bool atLastRingOfPolygon() { return current_ring + 1 == polygon_offsets[current_polygon]; }
    bool atLastPointOfRing() { return points_added == ring_offsets[current_ring]; }
    bool allRingsHaveAPositiveArea()
    {
        IColumn::Offset prev_offset = 0;
        for (const auto offset : ring_offsets)
        {
            if (offset - prev_offset < 3)
                return false;
            prev_offset = offset;
        }
        return true;
    }
};
struct Data
{
    std::vector<IPolygonDictionary::Polygon> & dest;
    std::vector<size_t> & ids;
    void addPolygon(bool new_multi_polygon = false)