MaxGekk commented on a change in pull request #28646:
URL: https://github.com/apache/spark/pull/28646#discussion_r431039157
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeFormatterHelper.scala
##########
@@ -217,9 +217,18 @@ private object DateTimeFormatterHelper {
toFormatter(builder, TimestampFormatter.defaultLocale)
}
+ final val bugInStandAloneForm = {
+ // Java 8 has a bug for stand-alone form. See
https://bugs.openjdk.java.net/browse/JDK-8114833
+ // Note: we only check the US locale so that it's a static check. It can
produce false-negative
+ // as some locales are not affected by the bug. Since `L` is rarely used,
we choose to not
+ // complicate the check here.
+ // TODO: remove it when we drop Java 8 support.
+ val formatter = DateTimeFormatter.ofPattern("LLL", Locale.US)
+ formatter.format(LocalDate.of(2000, 1, 1)) == "1"
Review comment:
So, we are sure 'LLL' and 'qqq' have the same problems. Can you check
'qqq' here as well?
```scala
val formatter = DateTimeFormatter.ofPattern("LLL qqq", Locale.US)
formatter.format(LocalDate.of(2000, 1, 1)) == "1 Q1"
```
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