Statistics
https://play.clickhouse.com/play?user=play#c2VsZWN0IAp0b1N0YXJ0T2ZIb3VyKGNoZWNrX3N0YXJ0X3RpbWUpIGFzIGQsCmNvdW50KCksICBncm91cFVuaXFBcnJheShwdWxsX3JlcXVlc3RfbnVtYmVyKSwgIGFueShyZXBvcnRfdXJsKQpmcm9tIGNoZWNrcyB3aGVyZSAnMjAyMi0wNi0wMScgPD0gY2hlY2tfc3RhcnRfdGltZSBhbmQgdGVzdF9uYW1lIGxpa2UgJyUwMjQ5MV9wYXJ0X2xvZ19oYXNfdGFibGVfdXVpZCUnIGFuZCB0ZXN0X3N0YXR1cyBpbiAoJ0ZBSUwnLCAnRkxBS1knKSBncm91cCBieSBkIG9yZGVyIGJ5IGQgZGVzYw==

Some times there are not output from requests.
}
    if (!does_storage_policy_allow_same_disk)
        throw Exception(
            ErrorCodes::BAD_ARGUMENTS,
            "Could not clone and load part {} because disk does not belong to storage policy",
            quoteString(src_part->getDataPartStorage().getFullPath()));
    String dst_part_name = src_part->getNewName(dst_part_info);
    assert(!tmp_part_prefix.empty());
    String tmp_dst_part_name = tmp_part_prefix + dst_part_name;
    auto temporary_directory_lock = getTemporaryPartDirectoryHolder(tmp_dst_part_name);
    
    auto reservation = src_part->getDataPartStorage().reserve(src_part->getBytesOnDisk());
    auto src_part_storage = src_part->getDataPartStoragePtr();
    scope_guard src_flushed_tmp_dir_lock;
    MergeTreeData::MutableDataPartPtr src_flushed_tmp_part;
    
    
    
    if (auto src_part_in_memory = asInMemoryPart(src_part))
    {
        auto flushed_part_path = *src_part_in_memory->getRelativePathForPrefix(tmp_part_prefix);
        auto tmp_src_part_file_name = fs::path(tmp_dst_part_name).filename();
        src_flushed_tmp_dir_lock = src_part->storage.getTemporaryPartDirectoryHolder(tmp_src_part_file_name);
        auto flushed_part_storage = src_part_in_memory->flushToDisk(flushed_part_path, metadata_snapshot);
        src_flushed_tmp_part = createPart(src_part->name, src_part->info, flushed_part_storage);
        src_flushed_tmp_part->is_temp = true;
        src_part_storage = flushed_part_storage;
    }
    String with_copy;
    if (copy_instead_of_hardlink)