mgaido91 commented on issue #25137: [SPARK-28348][SQL] Decimal precision promotion for binary arithmetic with casted decimal type URL: https://github.com/apache/spark/pull/25137#issuecomment-511101099 cc @cloud-fan @JoshRosen what do you think about this PR? This allows users to define as they prefer the result of a decimal operation basically. So they can either rely on our rules or they can choose the precision and scale for the result. Do you see some cases when this might be not good? anyway I think we should add a note in the migration guide, as it can cause change in the result.
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