dongjoon-hyun commented on issue #26549: [SPARK-29644][SQL][2.4] Corrected ShortType and ByteType mapping to SmallInt and TinyInt in JDBCUtils URL: https://github.com/apache/spark/pull/26549#issuecomment-554856623 Fixing bugs always change the behavior. All existing application which depends on the bug are affected naturally. I think this is a kind of issue of release note or migration (not a revert).
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