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

{
    auto result = NamesAndTypesList{
        {"_topic", std::make_shared<DataTypeString>()},
        {"_key", std::make_shared<DataTypeString>()},
        {"_offset", std::make_shared<DataTypeUInt64>()},
        {"_partition", std::make_shared<DataTypeUInt64>()},
        {"_timestamp", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeDateTime>())},
        {"_timestamp_ms", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeDateTime64>(3))},
        {"_headers.name", std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>())},
        {"_headers.value", std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>())}
    };
    if (kafka_settings->kafka_handle_error_mode == HandleKafkaErrorMode::STREAM)
    {
        result.push_back({"_raw_message", std::make_shared<DataTypeString>()});
        result.push_back({"_error", std::make_shared<DataTypeString>()});
    }
    return result;
}
Names StorageKafka::getVirtualColumnNames() const