gengliangwang opened a new pull request #23761: [SPARK-26857][SQL] Return UnsafeArrayData for date/timestamp type in ColumnarArray.copy() URL: https://github.com/apache/spark/pull/23761 ## What changes were proposed in this pull request? In https://github.com/apache/spark/issues/23569, the copy method of `ColumnarArray` is implemented. To further improve it, we can return UnsafeArrayData for date/timestamp type in `ColumnarArray.copy()`. ## How was this patch tested? Unit test
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