```
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] [                                                                                                                                                                                                                                        <=>               ]
```

const String & format,
    const S3::URI & uri,
    const String & access_key_id,
    const String & secret_access_key,
    UInt64 max_connections,
    UInt64 max_single_read_retries,
    const String & compression_method,
    bool distributed_processing,
    const std::optional<FormatSettings> & format_settings,
    ContextPtr ctx)
{
    ClientAuthentication client_auth{uri, access_key_id, secret_access_key, max_connections, {}, {}};
    updateClientAndAuthSettings(ctx, client_auth);
    return getTableStructureFromDataImpl(format, client_auth, max_single_read_retries, compression_method, distributed_processing, uri.key.find_first_of("*?{") != std::string::npos, format_settings, ctx);
}
ColumnsDescription StorageS3::getTableStructureFromDataImpl(