alamb commented on PR #16503:
URL: https://github.com/apache/datafusion/pull/16503#issuecomment-3004828625

   > I don't 100% know how the substrait plans are used, but I am slightly 
worried about one thing with this approach. Would it be possible to construct a 
substrait plan that converts the Duration to an IntervalDay, execute some 
operation that adds some days to the interval, then attempts and fails to 
convert it back to a duration?
   
   I think you can always go back from Duration --> IntervalDay
   
   But in any case, I don't think this would be a substrait specific difference 
-- it would be in the DataFusion engine itself


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