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https://issues.apache.org/jira/browse/PIG-963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12756166#action_12756166
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Daniel Dai commented on PIG-963:
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+1
> Join in local mode matches null keys
> ------------------------------------
>
> Key: PIG-963
> URL: https://issues.apache.org/jira/browse/PIG-963
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.4.0
> Reporter: Pradeep Kamath
> Assignee: Pradeep Kamath
> Attachments: PIG-963-2.patch, PIG-963.patch
>
>
> Semantics of join and cogroup dictate that null values for the keys from
> different inputs are NOT supposed to match. This is true in map reduce mode
> but local mode incorrectly matches these records.
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