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

#include <Storages/FileLog/FileLogSource.h>
#include <Storages/FileLog/ReadBufferFromFileLog.h>
#include <Storages/FileLog/StorageFileLog.h>
#include <Storages/StorageFactory.h>
#include <Storages/StorageMaterializedView.h>
#include <base/logger_useful.h>
#include <Common/Exception.h>
#include <Common/Macros.h>
#include <Common/filesystemHelpers.h>
#include <Common/getNumberOfPhysicalCPUCores.h>
#include <sys/stat.h>
namespace DB
{
namespace ErrorCodes
{
    extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
    extern const int BAD_ARGUMENTS;
    extern const int CANNOT_STAT;
    extern const int BAD_FILE_TYPE;
    extern const int CANNOT_READ_ALL_DATA;
    extern const int LOGICAL_ERROR;
    extern const int TABLE_METADATA_ALREADY_EXISTS;
    extern const int CANNOT_SELECT;
    extern const int QUERY_NOT_ALLOWED;
}
namespace
{
    const auto MAX_THREAD_WORK_DURATION_MS = 60000;
}
StorageFileLog::StorageFileLog(