```
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)
```
dir_entry.path().c_str(),
                root_meta_path);
        }
        ReadBufferFromFile in(dir_entry.path().c_str());
        FileMeta meta;
        UInt64 inode, last_written_pos;
        if (!tryReadIntText(inode, in))
        {
            throw Exception(ErrorCodes::CANNOT_READ_ALL_DATA, "Read meta file {} failed", dir_entry.path().c_str());
        }
        assertChar('\n', in);
        if (!tryReadIntText(last_written_pos, in))
        {
            throw Exception(ErrorCodes::CANNOT_READ_ALL_DATA, "Read meta file {} failed", dir_entry.path().c_str());
        }
        meta.file_name = dir_entry.path().filename();
        meta.last_writen_position = last_written_pos;
        file_infos.meta_by_inode.emplace(inode, meta);
    }
}
UInt64 StorageFileLog::getInode(const String & file_name)
{
    struct stat file_stat;
    if (stat(file_name.c_str(), &file_stat))
    {
        throw Exception(ErrorCodes::CANNOT_STAT, "Can not get stat info of file {}", file_name);
    }
    return file_stat.st_ino;
}
Pipe StorageFileLog::read(