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From "Eric Hanson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4961) Create bridge for custom UDFs to operate in vectorized mode
Date Wed, 18 Sep 2013 00:51:52 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770251#comment-13770251
] 

Eric Hanson commented on HIVE-4961:
-----------------------------------

See the design specification attached to HIVE-4160 for a design description of this patch.
                
> Create bridge for custom UDFs to operate in vectorized mode
> -----------------------------------------------------------
>
>                 Key: HIVE-4961
>                 URL: https://issues.apache.org/jira/browse/HIVE-4961
>             Project: Hive
>          Issue Type: Sub-task
>    Affects Versions: vectorization-branch
>            Reporter: Eric Hanson
>            Assignee: Eric Hanson
>             Fix For: vectorization-branch
>
>         Attachments: HIVE-4961.1-vectorization.patch, HIVE-4961.2-vectorization.patch,
HIVE-4961.3-vectorization.patch, HIVE-4961.4-vectorization.patch, vectorUDF.4.patch, vectorUDF.5.patch,
vectorUDF.8.patch, vectorUDF.9.patch
>
>
> Suppose you have a custom UDF myUDF() that you've created to extend hive. The goal of
this JIRA is to create a facility where if you run a query that uses myUDF() in an expression,
the query will run in vectorized mode.
> This would be a general-purpose bridge for custom UDFs that users add to Hive. It would
work with existing UDFs.
> I'm considering a separate JIRA for a new kind of custom UDF implementation that is vectorized
from the beginning, to optimize performance. That is not covered by this JIRA.

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