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https://issues.apache.org/jira/browse/PIG-5044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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liyunzhang_intel updated PIG-5044:
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    Attachment: PIG-5044.patch

[~kexianda]:  Help review PIG-5044.patch

> Create SparlCompiler#getSamplingJob in spark mode
> -------------------------------------------------
>
>                 Key: PIG-5044
>                 URL: https://issues.apache.org/jira/browse/PIG-5044
>             Project: Pig
>          Issue Type: Sub-task
>          Components: spark
>            Reporter: liyunzhang_intel
>            Assignee: liyunzhang_intel
>             Fix For: spark-branch
>
>         Attachments: PIG-5044.patch
>
>
> Like MRCompiler#getSamplingJob, we also need a function like that to sample 
> data from a file, sort sampling data  and generate output by 
> UDF(org.apache.pig.impl.builtin.FindQuantiles).



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