berkaysynnada commented on issue #15633:
URL: https://github.com/apache/datafusion/issues/15633#issuecomment-2875477677

   > Sorry, I am still not so clear about these cases ... is it ok to share 
more details?
   
   I mean v2 might be faster in the following case maybe
   
   ```
   // v1
   SELECT LAST_VALUE(a + b + c) FROM t GROUP BY d;
   
   // v2
   SELECT LAST_VALUE(a) + LAST_VALUE(b) + LAST_VALUE(c) FROM t GROUP BY d;
   ```
   
   but never mind, no need to go such deeper. Let's first focus on the main case


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