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

{
        ColumnsDescription columns_description{header.getNamesAndTypesList()};
        if (source_info->need_path_column)
            columns_description.add({"_path", std::make_shared<DataTypeString>()});
        if (source_info->need_file_column)
            columns_description.add({"_file", std::make_shared<DataTypeString>()});
        return columns_description;
    }
    StorageHiveSource(
        SourcesInfoPtr source_info_,
        String hdfs_namenode_url_,
        String format_,
        String compression_method_,
        Block sample_block_,
        ContextPtr context_,
        UInt64 max_block_size_,
        const Names & text_input_field_names_ = {})
        : SourceWithProgress(getHeader(sample_block_, source_info_))
        , WithContext(context_)
        , source_info(std::move(source_info_))
        , hdfs_namenode_url(hdfs_namenode_url_)
        , format(std::move(format_))
        , compression_method(compression_method_)
        , max_block_size(max_block_size_)
        , sample_block(std::move(sample_block_))
        , to_read_block(sample_block)
        , columns_description(getColumnsDescription(sample_block, source_info))
        , text_input_field_names(text_input_field_names_)
        , format_settings(getFormatSettings(getContext()))
    {