```
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 first = true;
        std::for_each(polygons.begin(), polygons.end(), [&](const auto & polygon)
        {
            bg::for_each_point(polygon, [&](const Point & point)
            {
                auto x = point.x();
                auto y = point.y();
                if (first || x < min_x)
                    min_x = x;
                if (first || x > max_x)
                    max_x = x;
                if (first || y < min_y)
                    min_y = y;
                if (first || y > max_y)
                    max_y = y;
                if (first)
                    first = false;
            });
        });
        max_x += kEps;
        max_y += kEps;
    }
};
}