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From "Igor Kabiljo (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2470) Improve support for Constant Object Inspectors
Date Fri, 30 Sep 2011 20:12:47 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13118370#comment-13118370
] 

Igor Kabiljo commented on HIVE-2470:
------------------------------------

If you create DeterministicGenericUDFWrapper, that basically has the same logic as your current
ConstantFoldableGenericUDF class, you don't need to change anything in ExprNodeGenericFuncEvaluator
(because it takes generic udf from ExprNodeGenericFuncDesc, which will be wrapped class if
udf is deterministic)
                
> 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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