srowen commented on a change in pull request #26261: [SPARK-29607][SQL] Move 
static methods from CalendarInterval to IntervalUtils
URL: https://github.com/apache/spark/pull/26261#discussion_r339314442
 
 

 ##########
 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/IntervalUtils.scala
 ##########
 @@ -119,4 +121,202 @@ object IntervalUtils {
       case _: IllegalArgumentException => null
     }
   }
+
+  private val yearMonthPattern = Pattern.compile("^([+|-])?(\\d+)-(\\d+)$")
 
 Review comment:
   You're already moving the code and converting to scala in other ways, so I 
think it's not a big deal to do it here rather than make another one for pretty 
minor adjustments. Or is there an argument that git won't really track the 
history of this code after move if it's changed a lot?

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