```
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 <Parsers/ASTExpressionList.h>
#include <Parsers/ASTCreateQuery.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTLiteral.h>
#include <QueryPipeline/Pipe.h>
#include <Processors/Sources/SourceWithProgress.h>
#include <Processors/Formats/IInputFormat.h>
#include <Processors/Executors/PullingPipelineExecutor.h>
#include <Processors/Transforms/AddingDefaultsTransform.h>
#include <Storages/HDFS/ReadBufferFromHDFS.h>
#include <Storages/Hive/HiveSettings.h>
#include <Storages/Hive/StorageHiveMetadata.h>
#include <Storages/MergeTree/KeyCondition.h>
#include <Storages/StorageFactory.h>
namespace DB
{
namespace ErrorCodes
{
    extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
    extern const int NOT_IMPLEMENTED;
    extern const int INVALID_PARTITION_VALUE;
    extern const int BAD_ARGUMENTS;
    extern const int CANNOT_OPEN_FILE;
}
static std::string getBaseName(const String & path)
{
    size_t basename_start = path.rfind('/');
    return path.substr(basename_start + 1);
}
class StorageHiveSource : public SourceWithProgress, WithContext