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Posted to dev@hive.apache.org by "Gunther Hagleitner (JIRA)" <ji...@apache.org> on 2015/03/17 00:00:41 UTC

[jira] [Created] (HIVE-9984) JoinReorder's getOutputSize is exponential

Gunther Hagleitner created HIVE-9984:
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             Summary: JoinReorder's getOutputSize is exponential
                 Key: HIVE-9984
                 URL: https://issues.apache.org/jira/browse/HIVE-9984
             Project: Hive
          Issue Type: Bug
            Reporter: Gunther Hagleitner
            Assignee: Gunther Hagleitner


Found by [~mmokhtar]. Causes major issues in large plans (50+ joins). Simple fix would be to memoize the recursion. There should also be a flag to switch this opt off.



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