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Posted to dev@hive.apache.org by "Navis (JIRA)" <ji...@apache.org> on 2014/07/25 02:54:38 UTC

[jira] [Commented] (HIVE-7513) Add ROW__ID VirtualColumn

    [ https://issues.apache.org/jira/browse/HIVE-7513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14073912#comment-14073912 ] 

Navis commented on HIVE-7513:
-----------------------------

Can we extend this to make a public interface for SerDe to provide virtual columns? I have no idea on this but seemed to good to have it.

> 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
>
> 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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