HeartSaVioR edited a comment on issue #25115: [SPARK-28351][SQL] Support DELETE in DataSource V2 URL: https://github.com/apache/spark/pull/25115#issuecomment-510509144 I have no idea what is the meaning of "maintenance" here. Could you elaborate a bit? UPDATE and DELETE are just DMLs. (UPSERT would be needed for streaming query to restore UPDATE mode in Structured Streaming, so we may add it eventually, then for me it's unclear where we can add SupportUpsert, directly, or under maintenance.) Sorry for the dumb question if it's just obvious one for others as well.
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