cloud-fan commented on issue #25453: [SPARK-28730][SQL] Configurable type coercion policy for table insertion URL: https://github.com/apache/spark/pull/25453#issuecomment-523715573 > Any thoughts on whether we can get rid of legacy mode for v1 if we implement ANSI mode? The general policy is to keep the legacy config for at least one release, if a behavior change is made. I think we can remove it in 3.1. I agree with forbidding legacy mode in v2. For now we can make v1 and v2 have different default policies. Once we make ANSI policy the default, then v1 and v2 can still have the same default policy.
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