panbingkun commented on code in PR #47364:
URL: https://github.com/apache/spark/pull/47364#discussion_r1686181924
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common/unsafe/src/main/java/org/apache/spark/sql/catalyst/util/CollationFactory.java:
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@@ -91,7 +91,7 @@ public Optional<String> getVersion() {
/**
* Entry encapsulating all information about a collation.
*/
- public static class Collation {
+ public static class Collation implements Comparable<Collation> {
Review Comment:
Okay.
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