GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/19898
[SPARK-22703][SQL] make ColumnarRow an immutable view
## 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 .
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark row-id
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19898.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #19898
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