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https://issues.apache.org/jira/browse/HIVE-9984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14368535#comment-14368535
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Lefty Leverenz commented on HIVE-9984:
--------------------------------------
Doc note: This adds *hive.reorder.nway.joins* to HiveConf.java, so it needs to
be documented for 1.2.0 in the wiki.
* [Configuration Properties -- Query and DDL Execution |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-QueryandDDLExecution]
> 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: Gopal V
> Labels: TODOC1.2
> Fix For: 1.2.0
>
> Attachments: HIVE-9984.1.patch, HIVE-9984.2.patch
>
>
> 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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