Omega359 commented on PR #21578:
URL: https://github.com/apache/datafusion/pull/21578#issuecomment-4270093176

   The dual runner was to validate results against a 'known good' database when 
generating the slt files. The results that came out of sqlite in a few cases 
didn't match up with what df nor pg resulted in thus I wanted the verification 
step. There is logic in there for handling double/float similarity iirc too 
since that often is different after 3 or 4 decimal places.
   
   Removing that functionality I don't think would be a great idea overall as 
having the validation of the results is a pretty useful feature.


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