alamb commented on issue #25100:
URL: https://github.com/apache/datafusion/issues/25100#issuecomment-5655990026

   I feel like there is a larger point here -- basically if we want to have 
better interop between java and datafusion, we should probably be testing that 
interop directly rather than reasoning about the code / adding incremental unit 
tests. That way we can ensure the systems interoperate and that we aren't 
introducing regressions
   
   Maybe we could look into some sort of automated testing -- or see if the 
substrait project already has one -- that actually creates plans and then 
verifies if DataFusion can read them successfully, and verifies the plan is as 
expected in DataFusion (e.g. check the plan)


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