caicancai commented on PR #9245:
URL: 
https://github.com/apache/arrow-datafusion/pull/9245#issuecomment-1951871324

   > Thank you @caicancai for adding the tests to document this feature more 
fully in code
   > 
   > I am hoping this type of "what should `log` do in corner cases" will have 
a better story once we have done #8045 -- and thus if someone wants a different 
set of `log` function behavior they can just register a different `log` UDF
   
   so cool, I think this is a very good idea, as a single sql engine can output 
the corresponding result expected by the user according to the user's custom 
behavior, which means that we do not need to adapt the negative test of each 
function in any dialect, but only need to concentrate on adapting most of the 
common functions


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