cloud-fan commented on a change in pull request #27672: [SPARK-30919][SQL] Make 
interval multiply and divide's overflow behavior consistent with other 
operations
URL: https://github.com/apache/spark/pull/27672#discussion_r383184398
 
 

 ##########
 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/intervalExpressions.scala
 ##########
 @@ -137,10 +139,22 @@ abstract class IntervalNumOperation(
 }
 
 case class MultiplyInterval(interval: Expression, num: Expression)
-  extends IntervalNumOperation(interval, num, multiplyExact, "multiplyExact")
+  extends IntervalNumOperation(interval, num) {
+
+  override protected val operation: (CalendarInterval, Double) => 
CalendarInterval =
+    (interval, num) => if (checkOverflow) multiplyExact(interval, num) else 
multiply(interval, num)
+
+  override protected def operationName: String = if (checkOverflow) 
"multiplyExact" else "multiply"
+}
 
 case class DivideInterval(interval: Expression, num: Expression)
-  extends IntervalNumOperation(interval, num, divideExact, "divideExact")
+  extends IntervalNumOperation(interval, num) {
+
+  override protected val operation: (CalendarInterval, Double) => 
CalendarInterval =
+    (interval, num) => if (checkOverflow) divideExact(interval, num) else 
divide(interval, num)
 
 Review comment:
   ditto

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