cloud-fan commented on code in PR #45436:
URL: https://github.com/apache/spark/pull/45436#discussion_r1519141471
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common/unsafe/src/main/java/org/apache/spark/sql/catalyst/util/CollationFactory.java:
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@@ -138,11 +138,13 @@ public Collation(
collationTable[2] = new Collation(
"UNICODE", Collator.getInstance(ULocale.ROOT), "153.120.0.0", true);
collationTable[2].collator.setStrength(Collator.TERTIARY);
+ collationTable[2].collator.freeze();
Review Comment:
This is interesting, I thought `Collator` is just holding a bunch of
functions, but it has mutable states?
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