```
$ ~/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)

{
    if (from.getType() == Field::Types::UInt64)
        return convertNumericTypeImpl<UInt64, To>(from);
    if (from.getType() == Field::Types::Int64)
        return convertNumericTypeImpl<Int64, To>(from);
    if (from.getType() == Field::Types::Float64)
        return convertNumericTypeImpl<Float64, To>(from);
    throw Exception("Type mismatch in IN or VALUES section. Expected: " + type.getName() + ". Got: "
        + Field::Types::toString(from.getType()), ErrorCodes::TYPE_MISMATCH);
}
template <typename From, typename T>
static Field convertIntToDecimalType(const Field & from, const DataTypeDecimal<T> & type)
{
    From value = from.get<From>();
    if (!type.canStoreWhole(value))
        throw Exception("Number is too much to place in " + type.getName(), ErrorCodes::ARGUMENT_OUT_OF_BOUND);
    T scaled_value = type.getScaleMultiplier() * value;
    return DecimalField<T>(scaled_value, type.getScale());
}
template <typename T>
static Field convertStringToDecimalType(const Field & from, const DataTypeDecimal<T> & type)
{
    const String & str_value = from.get<String>();
    T value = type.parseFromString(str_value);
    return DecimalField<T>(value, type.getScale());
}
template <typename From, typename T>
static Field convertDecimalToDecimalType(const Field & from, const DataTypeDecimal<T> & type)