yaooqinn commented on code in PR #46457:
URL: https://github.com/apache/spark/pull/46457#discussion_r1593465736


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sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/SparkDateTimeUtils.scala:
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@@ -197,8 +197,8 @@ trait SparkDateTimeUtils {
     rebaseJulianToGregorianDays(julianDays)
   }
 
-  private val zoneInfoClassName = "sun.util.calendar.ZoneInfo"
-  private val getOffsetsByWallHandle = {
+  private lazy val zoneInfoClassName = "sun.util.calendar.ZoneInfo"

Review Comment:
   > On the other hand, if TimeZone.getDefault.getOffset(localMillis) can be 
uniformly used to get timeZoneOffset in the toJavaDate function, then the use 
of the MethodHandle mechanism can be avoided here.
   
   It seems that `ZoneInfo.getOffset` doesn't support daylight saving 
transitions?



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