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## What changes were proposed in this pull request? Similar to https://github.com/apache/spark/pull/19842 , we should also make `ColumnarRow` an immutable view, and move forward to make `ColumnVector` public. ## How was this patch tested? Existing tests. The performance concern should be same as https://github.com/apache/spark/pull/19842 . Author: Wenchen Fan <wenchen@databricks.com> Closes #19898 from cloud-fan/row-id. |
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