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

if (select.distinct)
    {
        if (!optimize_sharding_key_aggregation || !expr_contains_sharding_key(select.select()->children))
            return {};
    }
    
    const ASTPtr group_by = select.groupBy();
    if (!query_info.syntax_analyzer_result->aggregates.empty() || group_by)
    {
        if (!optimize_sharding_key_aggregation || !group_by || !expr_contains_sharding_key(group_by->children))
            return {};
    }
    
    if (const ASTPtr limit_by = select.limitBy())
    {
        if (!optimize_sharding_key_aggregation || !expr_contains_sharding_key(limit_by->children))
            return {};
    }
    
    if (const ASTPtr order_by = select.orderBy())
        return default_stage;
    
    
    if (select.limitLength() || select.limitOffset())
        return default_stage;
    
    return QueryProcessingStage::Complete;
}
Pipe StorageDistributed::read(