**Use case**

Run view on each shard individually and insert into local node.

**Describe the solution you'd like**

```sql

INSERT INTO FUNCTION cluster('all-sharded', map, output, key_2) SELECT *
FROM cluster('all-sharded', view(
    SELECT *
    FROM map.input
    WHERE (key_1 % 2) = toUInt32(getMacro('all-sharded-shard'))
))
SETTINGS parallel_distributed_insert_select = 2

Query id: 0ef3707f-2b74-4367-bf6d-82939a64e0f2


0 rows in set. Elapsed: 0.002 sec.

Received exception from server (version 21.11.10):
Code: 60. DB::Exception: Received from localhost:9000. DB::Exception: Both table name and UUID are empty. (UNKNOWN_TABLE)
```
if (to_stage == QueryProcessingStage::WithMergeableState)
        return QueryProcessingStage::WithMergeableState;
    
    
    if (nodes == 1)
    {
        
        
        
        
        
        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