[
https://issues.apache.org/jira/browse/PIG-2423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13193391#comment-13193391
]
Thejas M Nair commented on PIG-2423:
------------------------------------
There is an existing jira for supporting combiner in co-group - PIG-1735.
bq. Another more general approach might be enriching the multi-query
optimization such that the common partitioning between two jobs is recognized.
We can discuss this on a new jira.
> 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.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
