cloud-fan commented on a change in pull request #28926:
URL: https://github.com/apache/spark/pull/28926#discussion_r447464759



##########
File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
##########
@@ -2679,6 +2682,11 @@ object Sequence {
          |final int $stepDays = $step.days;
          |final long $stepMicros = $step.microseconds;
          |
+         |if (${scale}L == ${MICROS_PER_DAY}L && $stepMonths == 0 && $stepDays 
== 0) {

Review comment:
       the `scale` is known before generating the code. We can do better
   ```
   val check = if (scale == MICROS_PER_DAY) {
     s"""
       if ($stepMonths == 0 && $stepDays == 0) ...
      """
   } else {
     ""
   }
   ```




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