rdblue opened a new pull request #23606: [SPARK-26666][SQL] Support DSv2 overwrite and dynamic partition overwrite. URL: https://github.com/apache/spark/pull/23606 ## What changes were proposed in this pull request? * Add `SupportsOverwrite` and `SupportsDynamicOverwrite` to DSv2 write API * Add `OverwriteByExpression` and `OverwritePartitionsDynamic` plans (logical and physical) * Add new plans to DSv2 write validation rule `ResolveOutputRelation` * Refactor `WriteToDataSourceV2Exec` into trait used by all DSv2 write exec nodes ## How was this patch tested? Existing tests cover changes to append and the dynamic overwrite plan, but leave out overwrite validation. Will add tests and update this PR.
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