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

return std::max(to_stage, QueryProcessingStage::Complete);
    }
    else if (nodes == 0)
    {
        
        
        
        return QueryProcessingStage::FetchColumns;
    }
    auto optimized_stage = getOptimizedQueryProcessingStage(query_info, settings);
    if (optimized_stage)
    {
        if (*optimized_stage == QueryProcessingStage::Complete)
            return std::min(to_stage, *optimized_stage);
        return *optimized_stage;
    }
    return QueryProcessingStage::WithMergeableState;
}
std::optional<QueryProcessingStage::Enum> StorageDistributed::getOptimizedQueryProcessingStage(const SelectQueryInfo & query_info, const Settings & settings) const
{
    bool optimize_sharding_key_aggregation =
        settings.optimize_skip_unused_shards &&
        settings.optimize_distributed_group_by_sharding_key &&
        has_sharding_key &&
        (settings.allow_nondeterministic_optimize_skip_unused_shards || sharding_key_is_deterministic);
    QueryProcessingStage::Enum default_stage = QueryProcessingStage::WithMergeableStateAfterAggregation;
    if (settings.distributed_push_down_limit)