Method createAttributes

src/Dictionaries/HashedArrayDictionary.cpp:450–480

template <DictionaryKeyType dictionary_key_type, bool sharded>
void HashedArrayDictionary<dictionary_key_type, sharded>::createAttributes()
{
    const auto size = dict_struct.attributes.size();
    attributes.reserve(size);

    for (const auto & dictionary_attribute : dict_struct.attributes)
    {
        auto type_call = [&, this](const auto & dictionary_attribute_type)
        {
            using Type = std::decay_t<decltype(dictionary_attribute_type)>;
            using AttributeType = typename Type::AttributeType;
            using ValueType = DictionaryValueType<AttributeType>;

            auto is_index_null = dictionary_attribute.is_nullable ? std::make_optional<VectorWithMemoryTracking<typename Attribute::RowsMask>>(configuration.shards) : std::nullopt;
            Attribute attribute{
                .containers = AttributeContainerShardsType<ValueType>(configuration.shards),
                .is_index_null = std::move(is_index_null),
                .type = dictionary_attribute.underlying_type};
            attributes.emplace_back(std::move(attribute));
        };

        callOnDictionaryAttributeType(dictionary_attribute.underlying_type, type_call);
    }

    key_attribute.containers.resize(configuration.shards);
    element_counts.resize(configuration.shards);

    string_arenas.resize(configuration.shards);
    for (auto & arena : string_arenas)
        arena = std::make_unique<Arena>();
}

template <DictionaryKeyType dictionary_key_type, bool sharded>
void HashedArrayDictionary<dictionary_key_type, sharded>::updateData()