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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7314) Wrong results of UDF when hive.cache.expr.evaluation is set
Date Mon, 30 Jun 2014 09:11:24 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14047480#comment-14047480
] 

Navis commented on HIVE-7314:
-----------------------------

Sorry, I should have used different way to discern expressions, instead of getExprString(),
which is dependent to implementation.

> Wrong results of UDF when hive.cache.expr.evaluation is set
> -----------------------------------------------------------
>
>                 Key: HIVE-7314
>                 URL: https://issues.apache.org/jira/browse/HIVE-7314
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.12.0
>            Reporter: dima machlin
>
> It seems that the expression caching doesn't work when using UDF inside another UDF or
a hive function.
> For example :
> tbl has one row : 'a','b'
> The following query :
> {code:sql} select concat(custUDF(a),' ', custUDF(b)) from tbl; {code}
> returns 'a a'
> seems to cache custUDF(a)  and use it for custUDF(b).
> Same query without the concat works fine.
> Replacing the concat with another custom UDF also returns 'a a'



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