gengliangwang edited a comment on issue #23829: [SPARK-26915][SQL]File source should write without schema validation in DataFrameWriter.save() URL: https://github.com/apache/spark/pull/23829#issuecomment-464992003 After thoughts, I don't think `DataFrameWriter.save` has to be involved with the `table` concept. Otherwise, things can be complex and there can be two different behaviors in one API `DataFrameWriter.save`. That is to say, let's remove the expression `AppendData` and `OverwriteByExpression` in `DataFrameWriter.save`, since their behaviors are different with the API's. It just doesn’t have to be a table. We can use `AppendData` and `OverwriteByExpression` in `DataFrameWriter.saveAsTable`, which is more appropriate.
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