```
touch /tmp/aaa.csv

CREATE TABLE log (A String) ENGINE= FileLog('/tmp/aaa.csv', 'CSV');
DB::Exception: The absolute data path should be inside `user_files_path`(/var/lib/clickhouse/user_files/). (BAD_ARGUMENTS)


CREATE TABLE log (A String) ENGINE= FileLog('/tmp/aaa.csv', 'CSV');
DB::Exception: Metadata files already exist by path: /var/lib/clickhouse/.filelog_storage_metadata/default/log, remove them manually if it is intended. (TABLE_METADATA_ALREADY_EXISTS)
```
{
    if (!std::filesystem::exists(root_meta_path))
    {
        std::filesystem::create_directories(root_meta_path);
    }
    auto full_name = getFullMetaPath(file_meta.file_name);
    if (!std::filesystem::exists(full_name))
    {
        FS::createFile(full_name);
    }
    else
    {
        checkOffsetIsValid(full_name, file_meta.last_writen_position);
    }
    WriteBufferFromFile out(full_name);
    writeIntText(inode, out);
    writeChar('\n', out);
    writeIntText(file_meta.last_writen_position, out);
}
void StorageFileLog::deserialize()