dongjoon-hyun commented on issue #26094: [SPARK-29442][SQL] Set `default` mode should override the existing mode URL: https://github.com/apache/spark/pull/26094#issuecomment-541912957 BTW, @cloud-fan and @brkyvz . The original change was introduced at https://github.com/apache/spark/pull/24233 by my suggestion because `DSv1` and `DSv2` have different default behaviors at that time. However, recently https://github.com/apache/spark/pull/25876 recovers the default behavior design in order to simplify and use `SaveMode.ErrorIfExists` by default. Please let me know if there is some conflicts with `DSv2` development plan.
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