SteveLauC commented on PR #9297:
URL: 
https://github.com/apache/arrow-datafusion/pull/9297#issuecomment-1956274804

   Hi @alamb, I think I might need some help on the sqllogictest CI error, with 
the `acos()` function implemented in this PR:
   
   1. `select(acos(NULL)` would return a column of type `?` rather than `R`
   2. `select(acos(0), acos(1))` would return columns of type `II` rather than 
`RR`
   
   Honestly, I have no idea about the above behavios...
   


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