nuno-faria commented on PR #17058:
URL: https://github.com/apache/datafusion/pull/17058#issuecomment-3182742707

   > I would feel more comfortable approving a smaller PR, especially when it 
targets a maintenance branch.
   
   The new fix makes the PR smaller, since it only implements 
`AggregateUDFImpl::reverse_expr` for `StringAgg`.
   
   > I also recommend adding another slt test to assert the planning result. 
Otherwise, it’s good to go (after deciding where to land)
   
   Updated. I think the fix should be good to go.
   
   > BTW, how does #16217 affect this? Were you able to see that those queries 
used `array_agg` before, and after that PR they now use `string_agg`? I’m a bit 
confused about that.
   
   They still used `string_agg`, but the `SortExec` was dropped after #16217. I 
just used `array_agg` as a comparison since the order on that function still 
worked after #16217.


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