```
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:
```
{
    auto size = key_columns.front()->size();
    auto result = ColumnUInt8::create(size);
    auto& out = result->getData();
    size_t row = 0;
    for (const auto & pt : extractPoints(key_columns))
    {
        size_t trash = 0;
        out[row] = find(pt, trash);
        ++row;
    }
    query_count.fetch_add(row, std::memory_order_relaxed);
    return result;
}
size_t IPolygonDictionary::getAttributeIndex(const std::string & attribute_name) const
{
    const auto it = attribute_index_by_name.find(attribute_name);
    if (it == attribute_index_by_name.end())
        throw Exception{"No such attribute: " + attribute_name, ErrorCodes::BAD_ARGUMENTS};
    return it->second;
}
template <typename AttributeType, typename OutputType, typename ValueSetter, typename DefaultValueExtractor>
void IPolygonDictionary::getItemsImpl(