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https://issues.apache.org/jira/browse/PIG-1506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904829#action_12904829
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Olga Natkovich commented on PIG-1506:
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I verified that 0.8 code does deal correctly with multi-column keys with nulls
> Need to clarify the difference between null handling in JOIN and COGROUP
> ------------------------------------------------------------------------
>
> Key: PIG-1506
> URL: https://issues.apache.org/jira/browse/PIG-1506
> Project: Pig
> Issue Type: Improvement
> Components: documentation
> Reporter: Olga Natkovich
> Assignee: Corinne Chandel
> Fix For: 0.8.0
>
>
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