Function getLeastCommonTypeForTuple

src/DataTypes/ObjectUtils.cpp:395–420

}

static DataTypePtr getLeastCommonTypeForTuple(
    const DataTypeTuple & type, const DataTypes & concrete_types, bool check_ambiguos_paths)
{
    const auto & element_types = type.getElements();
    DataTypes new_element_types(element_types.size());

    for (size_t i = 0; i < element_types.size(); ++i)
    {
        DataTypes concrete_element_types;
        concrete_element_types.reserve(concrete_types.size());

        for (const auto & type_concrete : concrete_types)
        {
            const auto * type_tuple_conctete = typeid_cast<const DataTypeTuple *>(type_concrete.get());
            if (!type_tuple_conctete)
                throw Exception(ErrorCodes::TYPE_MISMATCH, "Expected Tuple type, got {}", type_concrete->getName());

            concrete_element_types.push_back(type_tuple_conctete->getElement(i));
        }

        new_element_types[i] = getLeastCommonTypeForDynamicColumnsImpl(
            element_types[i], concrete_element_types, check_ambiguos_paths);
    }

    return recreateTupleWithElements(type, new_element_types);
}

static DataTypePtr getLeastCommonTypeForDynamicColumnsImpl(
    const DataTypePtr & type_in_storage, const DataTypes & concrete_types, bool check_ambiguos_paths)