cloud-fan commented on a change in pull request #26410: 
[SPARK-29387][SQL][FOLLOWUP] Fix issues of the multiply and divide for intervals
URL: https://github.com/apache/spark/pull/26410#discussion_r343125468
 
 

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 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/IntervalUtils.scala
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 @@ -386,6 +386,7 @@ object IntervalUtils {
   }
 
   def divide(interval: CalendarInterval, num: Double): CalendarInterval = {
 
 Review comment:
   we should move `add`, `subtract`, `negate` to `IntervalUtils` as well. Maybe 
we need to change the overflow behavior later on.
   
   @yaooqinn can you do this later?

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