```
$ ~/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 elements_num = nested_types.size();
    info.special_parser.nested_types.reserve(elements_num);
    for (auto & nested_type : nested_types)
    {
        
        bool is_nullable = false;
        if (const auto * nullable = dynamic_cast<const DataTypeNullable *>(nested_type.get()))
        {
            nested_type = nullable->getNestedType();
            is_nullable = true;
        }
        WhichDataType type_info{nested_type};
        Field::Types::Which field_type;
        
        if (type_info.isNativeUInt())
        {
            nested_type = std::make_shared<DataTypeUInt64>();
            field_type = Field::Types::UInt64;
        }
        else if (type_info.isNativeInt())
        {
            nested_type = std::make_shared<DataTypeInt64>();
            field_type = Field::Types::Int64;
        }
        else if (type_info.isFloat64())
        {
            field_type = Field::Types::Float64;
        }