shivsood commented on issue #27172: [WIP] [SPARK-29644][SQL] Fixed ByteType JDBCUtils to map to TinyInt at write read and ShortType on read URL: https://github.com/apache/spark/pull/27172#issuecomment-573255718 > what is the theory about compatibility? Yes this will introduce a diffirent behaviour. The write path was broken for ByteType, so that's a positive change in behaviour. This fixes it. On the other side, reading a SQL table with a TINYINT will get create column as ShortType rather than Integer. This is a not compatibility change. Should the feature be under a build time flag?
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