```
$ ~/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)

info.type = std::make_shared<DataTypeArray>(nested_types[0]);
        }
        else if (field_type == Field::Types::Tuple)
        {
            info.special_parser.is_tuple = true;
            info.type = applyVisitor(FieldToDataType(), info.literal->value);
            auto nested_types = assert_cast<const DataTypeTuple &>(*info.type).getElements();
            fillLiteralInfo(nested_types, info);
            info.type = std::make_shared<DataTypeTuple>(nested_types);
        }
        else if (field_type == Field::Types::Map)
        {
            info.special_parser.is_map = true;
            info.type = applyVisitor(FieldToDataType(), info.literal->value);
            auto nested_types = assert_cast<const DataTypeMap &>(*info.type).getKeyValueTypes();
            fillLiteralInfo(nested_types, info);
            info.type = std::make_shared<DataTypeMap>(nested_types);
        }
        else
            throw Exception(String("Unexpected literal type ") + info.literal->value.getTypeName() + ". It's a bug",
                            ErrorCodes::LOGICAL_ERROR);
        
        if (info.force_nullable && info.type->canBeInsideNullable())
        {
            info.type = makeNullable(info.type);
            info.special_parser.is_nullable = true;
        }
    }
};
ConstantExpressionTemplate::TemplateStructure::TemplateStructure(LiteralsInfo & replaced_literals, TokenIterator expression_begin, TokenIterator expression_end,