```
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 column_string = ColumnString::create();
            auto * out = column.get();
            getItemsImpl<String, StringRef>(
                index,
                key_columns,
                [&](const size_t, const StringRef & value) { out->insertData(value.data, value.size); },
                default_value_extractor);
        }
        else
        {
            auto & out = column->getData();
            getItemsImpl<AttributeType, AttributeType>(
                index,
                key_columns,
                [&](const size_t row, const auto value) { return out[row] = value; },
                default_value_extractor);
        }
        result = std::move(column);
    };
    callOnDictionaryAttributeType(dict_struct.attributes[index].underlying_type, type_call);
    return result;
}
BlockInputStreamPtr IPolygonDictionary::getBlockInputStream(const Names &, size_t) const
{
    
    
    throw Exception{"Reading the dictionary is not allowed", ErrorCodes::UNSUPPORTED_METHOD};
}
template <typename T>
void IPolygonDictionary::appendNullValueImpl(const Field & null_value)