```
$ ~/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)

{
    size_t size = elems.size();
    for (size_t i = 0; i < size; ++i)
        if (names[i] == name)
            return i;
    throw Exception("Tuple doesn't have element with name '" + name + "'", ErrorCodes::NOT_FOUND_COLUMN_IN_BLOCK);
}
bool DataTypeTuple::textCanContainOnlyValidUTF8() const
{
    return std::all_of(elems.begin(), elems.end(), [](auto && elem) { return elem->textCanContainOnlyValidUTF8(); });
}
bool DataTypeTuple::haveMaximumSizeOfValue() const
{
    return std::all_of(elems.begin(), elems.end(), [](auto && elem) { return elem->haveMaximumSizeOfValue(); });
}
bool DataTypeTuple::isComparable() const
{
    return std::all_of(elems.begin(), elems.end(), [](auto && elem) { return elem->isComparable(); });
}
size_t DataTypeTuple::getMaximumSizeOfValueInMemory() const
{
    size_t res = 0;
    for (const auto & elem : elems)
        res += elem->getMaximumSizeOfValueInMemory();
    return res;
}
size_t DataTypeTuple::getSizeOfValueInMemory() const