```
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:
```
{
    for (size_t i = 0, prev = ring.size() - 1; i < ring.size(); prev = i, ++i)
    {
        Point a = ring[prev];
        Point b = ring[i];
        
        if (a.x() > b.x())
            std::swap(a, b);
        if (a.x() == b.x() && a.y() > b.y())
            std::swap(a, b);
        if (a.x() == b.x())
        {
            
            continue;
        }
        all_edges.emplace_back(a, b, polygon_id, 0);
    }
}
SlabsPolygonIndex::Edge::Edge(