mgaido91 commented on issue #23468: [SPARK-26535][SQL] Parse literals as DOUBLE instead of DECIMALS URL: https://github.com/apache/spark/pull/23468#issuecomment-451749540 thanks for your comment @dongjoon-hyun. I wasn't aware of the behavior change in Hive. Then, if we don't want to do this, I think #21599 becomes even more important and we cannot forbid negative scales in decimals, because we would not be able anymore to represent numbers such as `1e40`. We may - instead - here try and reduce the cases when we use negative scales, so that `1e20` will be considered a `decimal(20, 0)` instead of a `decimal(1, -20)`. What do you think about this?
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