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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13617) LLAP: support non-vectorized execution in IO
Date Mon, 23 May 2016 17:30:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296686#comment-15296686
] 

Sergey Shelukhin commented on HIVE-13617:
-----------------------------------------

[~prasanth_j] this is ready for review.
[~mmccline] can you also take a look at vectorization-related code?

> LLAP: support non-vectorized execution in IO
> --------------------------------------------
>
>                 Key: HIVE-13617
>                 URL: https://issues.apache.org/jira/browse/HIVE-13617
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-13617-wo-11417.patch, HIVE-13617-wo-11417.patch, HIVE-13617.01.patch,
HIVE-13617.patch, HIVE-13617.patch, HIVE-15396-with-oi.patch
>
>
> Two approaches - a separate decoding path, into rows instead of VRBs; or decoding VRBs
into rows on a higher level (the original LlapInputFormat). I think the latter might be better
- it's not a hugely important path, and perf in non-vectorized case is not the best anyway,
so it's better to make do with much less new code and architectural disruption. 
> Some ORC patches in progress introduce an easy to reuse (or so I hope, anyway) VRB-to-row
conversion, so we should just use that.



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