cloud-fan commented on a change in pull request #27830: [SPARK-31030][SQL]
Backward Compatibility for Parsing and formatting Datetime
URL: https://github.com/apache/spark/pull/27830#discussion_r389590856
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
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@@ -906,4 +906,44 @@ object DateTimeUtils {
val days = period.getDays
new CalendarInterval(months, days, 0)
}
+
+ /**
+ * Since the Proleptic Gregorian calendar is de-facto calendar worldwide, as
well as the chosen
+ * one in ANSI SQL standard, Spark 3.0 switches to it by using Java 8 API
classes. However, the
Review comment:
It's a bit confusing to say java 7 & 8 as the old APIs are also available in
java 8.
How about `SimpleDateFormat` and `DateTimeFormatter`?
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