```
$ ~/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)

Field::Types::Which main_type = Field::Types::String;
    bool is_nullable = false;
    bool is_array = false;
    bool is_tuple = false;
    bool is_map = false;
    
    std::vector<std::pair<Field::Types::Which, bool>> nested_types;
    bool useDefaultParser() const
    {
        return main_type == Field::Types::String || (!nested_types.empty()
            && std::all_of(
                nested_types.begin(),
                nested_types.end(),
                [](const auto & type) { return type.first == Field::Types::String; }));
    }
};
struct LiteralInfo
{
    using ASTLiteralPtr = std::shared_ptr<ASTLiteral>;
    LiteralInfo(const ASTLiteralPtr & literal_, const String & column_name_, bool force_nullable_)
            : literal(literal_), dummy_column_name(column_name_), force_nullable(force_nullable_) { }
    ASTLiteralPtr literal;
    String dummy_column_name;
    
    
    bool force_nullable;
    DataTypePtr type;
    SpecialParserType special_parser;
};
static void fillLiteralInfo(DataTypes & nested_types, LiteralInfo & info)