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Posted to dev@pig.apache.org by "Adam Szita (JIRA)" <ji...@apache.org> on 2016/07/20 07:14:20 UTC

[jira] [Commented] (PIG-4852) Add accumulator implementation for MaxTupleBy1stField

    [ https://issues.apache.org/jira/browse/PIG-4852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15385473#comment-15385473 ] 

Adam Szita commented on PIG-4852:
---------------------------------

Hi, 
Isn't this already covered by ExternalTupleByNthField?
I think this should get you the same result:
define myMax ExtremalTupleByNthField( '1', 'max' );
This UDF implements both Algebraic and Accumulator.

> Add accumulator implementation for MaxTupleBy1stField
> -----------------------------------------------------
>
>                 Key: PIG-4852
>                 URL: https://issues.apache.org/jira/browse/PIG-4852
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Eyal Allweil
>            Priority: Minor
>              Labels: newbie, performance
>
> MaxTupleBy1stField has a regular and algebraic implementation; an accumulator implementation should be relatively easy to do.



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