cloud-fan commented on code in PR #46280:
URL: https://github.com/apache/spark/pull/46280#discussion_r1603384345
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common/unsafe/src/main/java/org/apache/spark/sql/catalyst/util/CollationFactory.java:
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@@ -110,6 +158,8 @@ public Collation(
// No Collation can simultaneously support binary equality and lowercase
equality
assert(!supportsBinaryEquality || !supportsLowercaseEquality);
+ assert(SUPPORTED_PROVIDERS.contains(provider) || provider == null);
Review Comment:
when `provider` can be null?
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