alamb commented on issue #18381:
URL: https://github.com/apache/datafusion/issues/18381#issuecomment-3511098821

   > Poll::Ready(Some(RecordBatch1)) -> Poll::Ready(None) -> 
Poll::Ready(Some(RecordBatch2)) -> Poll::Ready(None)
   
   Something is wrong here
   
   When the stream produces `Poll::Ready(None)` it means "end of stream" -- 
there shouldn't be any additional results after the first `Poll::Ready(None)`
   
   If the stream is not ready to produce the next item, it should return 
`Poll:Pending`


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