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Posted to dev@pig.apache.org by "Daniel Dai (JIRA)" <ji...@apache.org> on 2014/02/18 18:04:28 UTC

[jira] [Commented] (PIG-3747) Update skewed join documentation

    [ https://issues.apache.org/jira/browse/PIG-3747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13904248#comment-13904248 ] 

Daniel Dai commented on PIG-3747:
---------------------------------

I think the right table name "massive" should also be changed. The right table is not necessarily to be massive.

> Update skewed join documentation
> --------------------------------
>
>                 Key: PIG-3747
>                 URL: https://issues.apache.org/jira/browse/PIG-3747
>             Project: Pig
>          Issue Type: Bug
>          Components: documentation
>            Reporter: Cheolsoo Park
>            Assignee: Cheolsoo Park
>             Fix For: 0.13.0
>
>         Attachments: PIG-3747-1.patch
>
>
> While working on Tez skewed join, I found two problems with the skewed join documentation-
> # The following is misleading because skewed join also works with left, right, and full outer joins.
> {quote}
> Skewed join works with two-table inner join. 
> {quote}
> # In two-way join, the 1st table must be the skewed one because Pig samples on that. But this is not mentioned anywhere.



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