[jira] [Commented] (PIG-2204) Allow passing arguments to custom Partitioners

["Aniket Mokashi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-2204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488496#comment-13488496 ] 

Aniket Mokashi commented on PIG-2204:
-------------------------------------

Wouldn't this need support from hadoop? Current org.apache.hadoop.mapreduce.Job api provides only one api - setPartitionerClass(Class<? extends Partitioner> cls). We will need setPartitionerClass(Class<? extends Partitioner> cls, String[] ctorArgs) or some such api in hadoop. Is that correct? Am I missing something?
If we have to work around this, we need to have a ConfigurablePartitioner and then make pig pass the parameter from CLI to job configuration. Do we want to take that route?
                
> Allow passing arguments to custom Partitioners
> ----------------------------------------------
>
>                 Key: PIG-2204
>                 URL: https://issues.apache.org/jira/browse/PIG-2204
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Dmitriy V. Ryaboy
>
> Currently, this works:
> {code}
> y = group x by $0 partition by MyPartitioner PARALLEL 2;
> {code}
> However, passing an argument to the partitioner constructor does not work, and dies with a misleading error:
> {code}
> y = group x by $0 partition by MyPartitioner(0) PARALLEL 2;
> 2011-08-03 22:53:23,074 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1000: Error during parsing. Encountered " "(" "( "" at line 1, column 91.
> Was expecting one of:
>     "parallel" ...
>     ";" ...
>     "." ...
>     "$" ...
> {code}

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