MaxGekk commented on a change in pull request #27707: [SPARK-30958][SQL] do not
set default era for DateTimeFormatter
URL: https://github.com/apache/spark/pull/27707#discussion_r384607430
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeFormatterHelper.scala
##########
@@ -82,7 +81,14 @@ private object DateTimeFormatterHelper {
def buildFormatter(pattern: String, locale: Locale): DateTimeFormatter = {
val builder = createBuilder().appendPattern(pattern)
- toFormatter(builder, locale)
+ if (pattern.contains("y")) {
Review comment:
Another ways is to get access to the following list in
`DateTimeFormatterBuilder`:
```java
private final List<DateTimePrinterParser> printerParsers = new ArrayList<>();
```
via reflection, and find `NumberPrinterParser` with `field` ==
`ChronoField.YEAR_OF_ERA`.
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