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https://issues.apache.org/jira/browse/PIG-2423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13187034#comment-13187034
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Thejas M Nair commented on PIG-2423:
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You can just describe the documentation changes that are required. Corrine will
incorporate it into the xml and also take care of the formatting.
But if you really want to try out forrest, you can make changes to the xml, and
then use 'ant docs' target to generate the html docs. You will need to download
apache forrest and set forest.home to it.
> document use case where co-group is better choice than join
> ------------------------------------------------------------
>
> Key: PIG-2423
> URL: https://issues.apache.org/jira/browse/PIG-2423
> Project: Pig
> Issue Type: Improvement
> Components: documentation
> Reporter: Thejas M Nair
> Fix For: 0.10
>
>
> Optimization rules 2 and 3 suggested in
> https://issues.apache.org/jira/secure/attachment/12506841/pig_tpch.ppt
> (PIG-2397) recommend the use of co-group instead of join in certain cases.
> These should be documented in pig performance page.
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