```
$ ~/arc/build/clickhouse/programs/clickhouse client
ClickHouse client version 21.2.1.1-arcadia.
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 21.2.1 revision 54447.

max42-dev.sas.yp-c.yandex.net :) create table t(a Tuple(UInt8, UInt8)) engine = Log()

CREATE TABLE t
(
    `a` Tuple(UInt8, UInt8)
)
ENGINE = Log

Query id: b49dbb5d-d2a9-4c99-b90e-00c60edf2103

Ok.

0 rows in set. Elapsed: 0.005 sec. 

max42-dev.sas.yp-c.yandex.net :) insert into t values ((NULL, 42))

INSERT INTO t VALUES

Query id: 318d6f3e-f3bc-467c-85ff-62da908230dd

Logical error: 'Unexpected literal type inside Array: Nothing. It's a bug'.
Aborted (core dumped)
```

This is CH similar to one from Arcadia r7788360 (~fresh master version from GH).

(you don't have to strictly follow this form)

: elems(elems_), names(names_), have_explicit_names(true), serialize_names(serialize_names_)
{
    size_t size = elems.size();
    if (names.size() != size)
        throw Exception("Wrong number of names passed to constructor of DataTypeTuple", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
    if (auto exception = checkTupleNames(names))
        throw std::move(*exception);
}
bool DataTypeTuple::canBeCreatedWithNames(const Strings & names)
{
    return checkTupleNames(names) == std::nullopt;
}
std::string DataTypeTuple::doGetName() const
{
    size_t size = elems.size();
    WriteBufferFromOwnString s;
    s << "Tuple(";
    for (size_t i = 0; i < size; ++i)
    {
        if (i != 0)
            s << ", ";
        if (have_explicit_names && serialize_names)
            s << backQuoteIfNeed(names[i]) << ' ';
        s << elems[i]->getName();
    }
    s << ")";
    return s.str();
}
static inline IColumn & extractElementColumn(IColumn & column, size_t idx)