cloud-fan commented on a change in pull request #28646:
URL: https://github.com/apache/spark/pull/28646#discussion_r430898558
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeFormatterHelper.scala
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@@ -244,6 +250,12 @@ private object DateTimeFormatterHelper {
for (style <- unsupportedNarrowTextStyle if
patternPart.contains(style)) {
throw new IllegalArgumentException(s"Too many pattern letters:
${style.head}")
}
+ if (bugInStandAloneForm && (patternPart.contains("LLL") ||
patternPart.contains("qqq"))) {
Review comment:
In the java doc:
```
Pattern letters 'L', 'c', and 'q' specify the stand-alone form of the text
styles.
```
I think they are directly related. And I tested `q` locally as well. `c` is
already forbidden in 3.0.
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