I am reading clickhouse mutation code. In StorageMergeTree->selectPartsToMutate() function, there is a check 
`if (current_ast_elements + commands_size >= max_ast_elements)
                break;`

I think if there are many mutations then the check result will be true, so that it will skip the remaining mutations.
But the new part's mutation is set to the last one in mutation map, and it does not apply the remaining mutations actually.
`new_part_info.mutation = current_mutations_by_version.rbegin()->first;`

Then the new part will miss the remaining mutations in future mutation job.

I think it's wrong here. Am I right?

If it is right, I will submit a PR 

{
    std::lock_guard lock(current_zookeeper_mutex);
    return current_zookeeper;
}
zkutil::ZooKeeperPtr StorageReplicatedMergeTree::getZooKeeper() const
{
    auto res = tryGetZooKeeper();
    if (!res)
        throw Exception("Cannot get ZooKeeper", ErrorCodes::NO_ZOOKEEPER);
    return res;
}
static std::string normalizeZooKeeperPath(std::string zookeeper_path, bool check_starts_with_slash, Poco::Logger * log = nullptr)
{
    if (!zookeeper_path.empty() && zookeeper_path.back() == '/')
        zookeeper_path.resize(zookeeper_path.size() - 1);
    
    if (!zookeeper_path.empty() && zookeeper_path.front() != '/')
    {
        
        if (check_starts_with_slash)
            throw Exception(ErrorCodes::BAD_ARGUMENTS, "ZooKeeper path must starts with '/', got '{}'", zookeeper_path);
        if (log)
            LOG_WARNING(log, "ZooKeeper path ('{}') does not start with '/'. It will not be supported in future releases");
        zookeeper_path = "/" + zookeeper_path;
    }
    return zookeeper_path;
}
static String extractZooKeeperName(const String & path)