andygrove commented on pull request #55:
URL: https://github.com/apache/arrow-datafusion/pull/55#issuecomment-829296665


   Thanks, @houqp! I'm excited to see this work. I have had a few attempts in 
the past at implementing some of these changes myself and they always ended up 
being hugely disruptive. I look forward to seeing the design document and will 
comment more once that is up.
   
   One more thing we should think about is working with schemaless data 
sources. This isn't something we have really talked about yet and I have a 
concern about moving from resolving columns by name to using indices because it 
might limit our ability to support this use case in the future.


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