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https://issues.apache.org/jira/browse/HIVE-7513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085432#comment-14085432
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Eugene Koifman commented on HIVE-7513:
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Bunch of failures here because the columns got renamed in the plan. The
internal col names such as _col5 became _col6. Most of the failed test cases
is in the join queries because adding VirtualColumns to LHS table renumbers the
RHS columns.
> Add ROW__ID VirtualColumn
> -------------------------
>
> Key: HIVE-7513
> URL: https://issues.apache.org/jira/browse/HIVE-7513
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor
> Affects Versions: 0.13.1
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Attachments: HIVE-7513.3.patch
>
>
> In order to support Update/Delete we need to read rowId from AcidInputFormat
> and pass that along through the operator pipeline (built from the WHERE
> clause of the SQL Statement) so that it can be written to the delta file by
> the update/delete (sink) operators.
> The parser will add this column to the projection list to make sure it's
> passed along.
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