Function unflattenObjectToTuple

src/DataTypes/ObjectUtils.cpp:786–815

}

std::pair<ColumnPtr, DataTypePtr> unflattenObjectToTuple(const ColumnObject & column)
{
    const auto & subcolumns = column.getSubcolumns();

    if (subcolumns.empty())
    {
        auto type = std::make_shared<DataTypeTuple>(
            DataTypes{std::make_shared<DataTypeUInt8>()},
            Names{ColumnObject::COLUMN_NAME_DUMMY});

        return {type->createColumn()->cloneResized(column.size()), type};
    }

    PathsInData paths;
    DataTypes types;
    Columns columns;

    paths.reserve(subcolumns.size());
    types.reserve(subcolumns.size());
    columns.reserve(subcolumns.size());

    for (const auto & entry : subcolumns)
    {
        paths.emplace_back(entry->path);
        types.emplace_back(entry->data.getLeastCommonType());
        columns.emplace_back(entry->data.getFinalizedColumnPtr());
    }

    return unflattenTuple(paths, types, columns);
}

std::pair<ColumnPtr, DataTypePtr> unflattenTuple(
    const PathsInData & paths,