Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/19250#discussion_r143243228
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
---
@@ -1015,6 +1020,10 @@ object DateTimeUtils {
guess
}
+ def convertTz(ts: SQLTimestamp, fromZone: String, toZone: String):
SQLTimestamp = {
+ convertTz(ts, getTimeZone(fromZone), getTimeZone(toZone))
--- End diff --
I guess caching the value as done by the `FromUTCTimestamp` expression is
the right way to go?
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