```
$ ~/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)

extern const int LOGICAL_ERROR;
    extern const int NOT_FOUND_COLUMN_IN_BLOCK;
    extern const int ILLEGAL_COLUMN;
    extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
    extern const int SIZES_OF_COLUMNS_IN_TUPLE_DOESNT_MATCH;
}
DataTypeTuple::DataTypeTuple(const DataTypes & elems_)
    : elems(elems_), have_explicit_names(false)
{
    
    size_t size = elems.size();
    names.resize(size);
    for (size_t i = 0; i < size; ++i)
        names[i] = toString(i + 1);
}
static std::optional<Exception> checkTupleNames(const Strings & names)
{
    std::unordered_set<String> names_set;
    for (const auto & name : names)
    {
        if (name.empty())
            return Exception("Names of tuple elements cannot be empty", ErrorCodes::BAD_ARGUMENTS);
        if (isNumericASCII(name[0]))
            return Exception("Explicitly specified names of tuple elements cannot start with digit", ErrorCodes::BAD_ARGUMENTS);
        if (!names_set.insert(name).second)
            return Exception("Names of tuple elements must be unique", ErrorCodes::DUPLICATE_COLUMN);
    }
    return {};
}
DataTypeTuple::DataTypeTuple(const DataTypes & elems_, const Strings & names_, bool serialize_names_)