u70b3 commented on issue #23894:
URL: https://github.com/apache/datafusion/issues/23894#issuecomment-5126190202

   take — I'll fix `mod`'s zero-divisor handling in the shared `try_rem` 
helper, mirroring the shape #23898 established for `pmod`:
   
   - ANSI mode: raise for a zero divisor of any numeric type (including 
floating point, where Arrow's `rem` quietly returns `NaN`), with the check 
masked by the validity of the dividend to match Spark's null-intolerant 
semantics
   - Both modes: treat `-0.0` as a zero divisor (Arrow's total-order float 
comparisons don't match it against `0.0`)
   
   I'll replicate the `is_zero`/`negative_zero` helpers from #23898 so the two 
PRs stay consistent; whichever lands second can dedupe them in a rebase. Not 
touching #23897 here since that's a repo-wide error-text policy question.


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