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From "Jonathan Chang (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2470) Improve support for Constant Object Inspectors
Date Fri, 30 Sep 2011 19:41:45 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13118328#comment-13118328
] 

Jonathan Chang commented on HIVE-2470:
--------------------------------------

True, I can add a hook in exprnodegenericfuncevaluator so that if the outputOI is a constantOI
to skip evaluation.  @jvs, does that sound ok? (along with adding deterministic/stateful checks
in genericfuncdesc)
                
> Improve support for Constant Object Inspectors
> ----------------------------------------------
>
>                 Key: HIVE-2470
>                 URL: https://issues.apache.org/jira/browse/HIVE-2470
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Jonathan Chang
>            Assignee: Jonathan Chang
>         Attachments: HIVE-1360.part2.patch, HIVE-2470.patch
>
>
> ConstantObjectInspectors are nice but they need to be more widely supported and used.
 In particular,
> * More functions need to be using them.
> * There need to be facilities for propagating constness.
> * Support for complex types must be added.

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