```
ubuntu@ip-172-31-79-147:/opt/downloads$ clickhouse-local --max_threads 8 --query "WITH parseDateTimeBestEffort(extract(_path, 'pageviews-([\\d\\-]+)\\.gz$')) AS time, splitByChar(' ', line) AS values, splitByChar('.', values[1]) AS projects SELECT time, projects[1] AS project, projects[2] AS subproject, values[2] AS path, (values[3])::UInt64 AS hits FROM file('pageviews*.gz', LineAsString) WHERE length(values) >= 3" | pv > /dev/null
^C01GiB 0:01:08 [ 129MiB/s] [                                                                                                                                                                   <=>                                                                                    ]

ubuntu@ip-172-31-79-147:/opt/downloads$ clickhouse-local --max_threads 8 --query "WITH parseDateTimeBestEffort(extract(toLowCardinality(_path), 'pageviews-([\\d\\-]+)\\.gz$')) AS time, splitByChar(' ', line) AS values, splitByChar('.', values[1]) AS projects SELECT time, projects[1] AS project, projects[2] AS subproject, values[2] AS path, (values[3])::UInt64 AS hits FROM file('pageviews*.gz', LineAsString) WHERE length(values) >= 3" | pv > /dev/null
^C46GiB 0:00:48 [ 175MiB/s] [                                                                                                                                                                                                                                        <=>               ]
```

{
    if (distributed_processing)
    {
        return std::make_shared<StorageS3Source::IteratorWrapper>(
            [callback = local_context->getReadTaskCallback()]() -> String {
                return callback();
        });
    }
    else if (is_key_with_globs)
    {
        
        auto glob_iterator = std::make_shared<StorageS3Source::DisclosedGlobIterator>(*client_auth.client, client_auth.uri);
        return std::make_shared<StorageS3Source::IteratorWrapper>([glob_iterator]()
        {
            return glob_iterator->next();
        });
    }
    else
    {
        auto keys_iterator = std::make_shared<StorageS3Source::KeysIterator>(keys);
        return std::make_shared<StorageS3Source::IteratorWrapper>([keys_iterator]()
        {
            return keys_iterator->next();
        });
    }
}
Pipe StorageS3::read(