findepi commented on issue #17947:
URL: https://github.com/apache/datafusion/issues/17947#issuecomment-3378093060

   > We have done that on string UTs: 
https://github.com/apache/datafusion/blob/main/datafusion/sqllogictest/test_files/string/README.md
   
   the current approach is not the best for testing cases mixing various string 
types.
   it also works only for test cases which do not provide input data with 
VALUES 
   
   so +1 for fuzzying within SLT runner.
   
   as noted 
https://github.com/apache/datafusion/issues/13408#issuecomment-3368478752, this 
can be applied directly to string literals (`'...'` values) within the 
SQL-to-LP layer.


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