alamb commented on PR #21236:
URL: https://github.com/apache/datafusion/pull/21236#issuecomment-4202049546

   > @alamb @xudong963 I see that the test results are now available. I'm not 
entirely sure how to interpret them, but based on a rough comparison with the 
baseline branch, it appears there is some impact. I'm not certain whether this 
discrepancy is acceptable. If you feel it is not, we can temporarily close this 
PR while I look for alternative solutions.
   
   Yes I agree -- my interpretation of the benchmark results show that this PR 
causes a small (1-3%) slowdown in SQL planning. I don't think it is acceptable 
to slow down all query planning to improve an error message. (It is fine to 
slow down planning when the error was going to be generated, but we shouldn't 
take all good queries too)
   
   Thank you very much for looking into this


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