It performs unneeded requests:

```
EXPLAIN SELECT * FROM url('https://hacker-news.firebaseio.com/v0/item/{1..100}.json', JSONEachRow,　$$　id UInt32,　deleted UInt8,　type Enum('story' = 1, 'comment' = 2, 'poll' = 3, 'pollopt' = 4, 'job' = 5),　by LowCardinality(String),　time DateTime,　text String,　dead UInt8,　parent UInt32,　poll UInt32,　kids Array(UInt32),　url String,　score Int32,　title String,　parts Array(UInt32),　descendants Int32　$$)
```
{
            return name;
        }
        Chunk generate() override
        {
            if (!reader)
                return {};
            Chunk chunk;
            if (reader->pull(chunk))
                return chunk;
            pipeline->reset();
            reader.reset();
            return {};
        }
    private:
        String name;
        std::unique_ptr<ReadBuffer> read_buf;
        std::unique_ptr<QueryPipeline> pipeline;
        std::unique_ptr<PullingPipelineExecutor> reader;
    };
}
StorageURLSink::StorageURLSink(