[SPARK-48403][SQL] Fix Lower & Upper expressions for UTF8_BINARY_LCASE & ICU collations #46720
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common/unsafe/src/main/java/org/apache/spark/sql/catalyst/util/CollationAwareUTF8String.java
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common/unsafe/src/test/java/org/apache/spark/unsafe/types/CollationSupportSuite.java
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thanks, merging to master! |
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What changes were proposed in this pull request?
String lowercase/uppercase conversion in UTF8_BINARY_LCASE now works using ICU default locale, similar to how other ICU collations currently work in Spark.
Why are the changes needed?
All collations apart from UTF8_BINARY should use the same interface (UCharacter) that utilizes ICU toLowerCase/toUpperCase implementation, rather than mixing JVM & ICU implementations.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Existing unit tests and e2e sql tests.
Was this patch authored or co-authored using generative AI tooling?
No.