```
$ ~/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)

{
    nested->updateWeakHash32(hash);
}
void ColumnMap::updateHashFast(SipHash & hash) const
{
    nested->updateHashFast(hash);
}
void ColumnMap::insertRangeFrom(const IColumn & src, size_t start, size_t length)
{
    nested->insertRangeFrom(
        assert_cast<const ColumnMap &>(src).getNestedColumn(),
        start, length);
}
ColumnPtr ColumnMap::filter(const Filter & filt, ssize_t result_size_hint) const
{
    auto filtered = nested->filter(filt, result_size_hint);
    return ColumnMap::create(filtered);
}
ColumnPtr ColumnMap::permute(const Permutation & perm, size_t limit) const
{
    auto permuted = nested->permute(perm, limit);
    return ColumnMap::create(std::move(permuted));
}
ColumnPtr ColumnMap::index(const IColumn & indexes, size_t limit) const
{
    auto res = nested->index(indexes, limit);
    return ColumnMap::create(std::move(res));
}
ColumnPtr ColumnMap::replicate(const Offsets & offsets) const