```
CREATE TABLE default.x AS system.numbers ENGINE = Log;

INSERT INTO FUNCTION cluster('test_cluster_two_shards', default, x) SELECT * FROM numbers(10)

Received exception from server (version 20.11.1):
Code: 55. DB::Exception: Received from localhost:9000. DB::Exception: Method write is not supported by storage Distributed with more than one shard and no sharding key provided. 

0 rows in set. Elapsed: 0.001 sec. 

INSERT INTO FUNCTION cluster('test_cluster_two_shards', default, x, rand()) SELECT * FROM numbers(10)

Received exception from server (version 20.11.1):
Code: 42. DB::Exception: Received from localhost:9000. DB::Exception: Table function 'cluster' requires from 2 to 3 parameters: <addresses pattern or cluster name>, <name of remote database>, <name of remote table>. 

0 rows in set. Elapsed: 0.001 sec. 
```
{
    if (!blocksHaveEqualStructure(out->getHeader(), block))
    {
        ConvertingBlockInputStream convert(
            std::make_shared<OneBlockInputStream>(block),
            out->getHeader(),
            ConvertingBlockInputStream::MatchColumnsMode::Name);
        auto adopted_block = convert.read();
        for (size_t i = 0; i < repeats; ++i)
            out->write(adopted_block);
    }
    else
    {
        for (size_t i = 0; i < repeats; ++i)
            out->write(block);
    }
}
DistributedBlockOutputStream::DistributedBlockOutputStream(