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binlijin commented on HIVE-2801: -------------------------------- All records who's join key is null will go to the same reduce. > When join key is null, random distribute this tuple > --------------------------------------------------- > > Key: HIVE-2801 > URL: https://issues.apache.org/jira/browse/HIVE-2801 > Project: Hive > Issue Type: Improvement > Reporter: binlijin > Assignee: binlijin > Attachments: HIVE-2801.patch > > -- 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