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 

if (zookeeper->exists(zookeeper_path + "/dropped"))
        {
            
            
            
            LOG_WARNING(log, "Removing leftovers from table {} (this might take several minutes)", zookeeper_path);
            String drop_lock_path = zookeeper_path + "/dropped/lock";
            Coordination::Error code = zookeeper->tryCreate(drop_lock_path, "", zkutil::CreateMode::Ephemeral);
            if (code == Coordination::Error::ZNONODE || code == Coordination::Error::ZNODEEXISTS)
            {
                LOG_WARNING(log, "The leftovers from table {} were removed by another replica", zookeeper_path);
            }
            else if (code != Coordination::Error::ZOK)
            {
                throw Coordination::Exception(code, drop_lock_path);
            }
            else
            {
                auto metadata_drop_lock = zkutil::EphemeralNodeHolder::existing(drop_lock_path, *zookeeper);
                if (!removeTableNodesFromZooKeeper(zookeeper, zookeeper_path, metadata_drop_lock, log))
                {
                    
                    continue;
                }
            }
        }
        LOG_DEBUG(log, "Creating table {}", zookeeper_path);
        
        String metadata_str = ReplicatedMergeTreeTableMetadata(*this, metadata_snapshot).toString();