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From "Eric Hanson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5757) Implement vectorized support for CASE
Date Thu, 02 Jan 2014 18:07:53 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13860421#comment-13860421
] 

Eric Hanson commented on HIVE-5757:
-----------------------------------

Updated patch per Sergey's feedback on RB.

> Implement vectorized support for CASE
> -------------------------------------
>
>                 Key: HIVE-5757
>                 URL: https://issues.apache.org/jira/browse/HIVE-5757
>             Project: Hive
>          Issue Type: Sub-task
>    Affects Versions: 0.13.0
>            Reporter: Eric Hanson
>            Assignee: Eric Hanson
>         Attachments: HIVE-5757.1.patch, HIVE-5757.2.patch, HIVE-5757.3.patch, HIVE-5757.4.patch
>
>
> Implement support for CASE in vectorized mode. The approach is to use the vectorized
UDF adaptor internally. A higher-performance version that used VectorExpression subclasses
was considered but not done due to complexity. Such a version potentially could be done in
the future if it's important enough.
> This is high priority because CASE is a fairly popular expression.



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