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https://issues.apache.org/jira/browse/PIG-2661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13402619#comment-13402619
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Jie Li commented on PIG-2661:
-----------------------------
{code}
a = load 'in' as (g:{});
b = foreach a generate flatten(g);
c = order b by $1;
dump c;
{code}
For this query, if we merge the flatten into the sample, then the sample will
read 100 bags and flatten them to possibly unlimited number of records, all of
which will flow through one single reducer of the sampling job.
> Pig uses an extra job for loading data in Pigmix L9
> ---------------------------------------------------
>
> Key: PIG-2661
> URL: https://issues.apache.org/jira/browse/PIG-2661
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.9.0
> Reporter: Jie Li
> Assignee: Jie Li
> Attachments: PIG-2661.0.patch, PIG-2661.1.patch, PIG-2661.2.patch
>
>
> See
> https://issues.apache.org/jira/browse/PIG-200?focusedCommentId=13260155&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13260155
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