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Posted to issues@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2016/04/26 22:42:12 UTC
[jira] [Commented] (HIVE-13617) LLAP: support non-vectorized
execution in IO
[ https://issues.apache.org/jira/browse/HIVE-13617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258879#comment-15258879 ]
Sergey Shelukhin commented on HIVE-13617:
-----------------------------------------
[~prasanth_j] [~hagleitn] fyi
[~owen.omalley] what is the final JIRA that adds the vrb-to-row conversion? We would like to reuse that code after it goes in
> 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
>
> Two approaches - a separate decoding path, into rows instead of VRBs; or decoding VRBs into rows. 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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