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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-750) Use combiner when algebraic UDFs are used in expressions
Date Tue, 09 Nov 2010 22:24:23 GMT

     [ https://issues.apache.org/jira/browse/PIG-750?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Olga Natkovich updated PIG-750:
-------------------------------

    Summary: Use combiner when algebraic UDFs are used in expressions  (was: Use combiner
when a mix of algebraic and non-algebraic functions are used)

> Use combiner when algebraic UDFs are used in expressions
> --------------------------------------------------------
>
>                 Key: PIG-750
>                 URL: https://issues.apache.org/jira/browse/PIG-750
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Amir Youssefi
>            Assignee: Thejas M Nair
>            Priority: Minor
>
> Currently Pig uses combiner when all a,b, c,... are algebraic (e.g. SUM, AVG etc.) in
foreach:
> foreach X generate a,b,c,... 
>  It's a performance improvement if it uses combiner when a mix of algebraic and non-algebraic
functions are used as well.

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