```
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)
```
serialize();
}
void StorageFileLog::closeFilesAndStoreMeta(size_t start, size_t end)
{
    assert(start < end);
    assert(end <= file_infos.file_names.size());
    for (size_t i = start; i < end; ++i)
    {
        auto & file_ctx = findInMap(file_infos.context_by_name, file_infos.file_names[i]);
        if (file_ctx.reader)
        {
            if (file_ctx.reader->is_open())
                file_ctx.reader->close();
        }
        auto & meta = findInMap(file_infos.meta_by_inode, file_ctx.inode);
        serialize(file_ctx.inode, meta);
    }
}
void StorageFileLog::storeMetas(size_t start, size_t end)
{
    assert(start < end);
    assert(end <= file_infos.file_names.size());
    for (size_t i = start; i < end; ++i)
    {
        auto & file_ctx = findInMap(file_infos.context_by_name, file_infos.file_names[i]);
        auto & meta = findInMap(file_infos.meta_by_inode, file_ctx.inode);
        serialize(file_ctx.inode, meta);
    }
}
void StorageFileLog::checkOffsetIsValid(const String & full_name, UInt64 offset)