v.25.2Bug Fix

Fix Nullsafe JOIN Handling for LowCardinality Nullable Data Type

Official CH changelog text
Fix nullsafe JOIN handling for LowCardinality nullable data type. Previously JOIN ON with nullsafe comparison, such as IS NOT DISTINCT FROM, <=> , a IS NULL AND b IS NULL OR a == b didn't work correctly with LowCardinality columns. #75143 (Vladimir Cherkasov).
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