```
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 path = PartitionedSink::replaceWildcards(uri, partition_id);
        PartitionedSink::validatePartitionKey(path, true);
        return std::make_shared<HDFSSink>(path, format, sample_block, context, compression_method);
    }
private:
    const String uri;
    const String format;
    const Block sample_block;
    ContextPtr context;
    const CompressionMethod compression_method;
};
bool StorageHDFS::isColumnOriented() const
{
    return format_name != "Distributed" && FormatFactory::instance().checkIfFormatIsColumnOriented(format_name);
}
Pipe StorageHDFS::read(
    const Names & column_names,
    const StorageMetadataPtr & metadata_snapshot,
    SelectQueryInfo & ,
    ContextPtr context_,
    QueryProcessingStage::Enum ,
    size_t max_block_size,
    unsigned num_streams)