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Yin Huai commented on HIVE-2206: -------------------------------- Yongqiang: I will change the name of optimizer. But, I'd prefer the name like "query correlation detector" or "multi-query optimizer", because I think that the name of "cooperative scan" limits the scope of this optimizer. Besides shared-scan, if ReduceSinkOperators of two chained Hive-generated MapReduce jobs share the same key(s), this optimizer can merge the second job into the reduce phase of the first job. I will upload a patch by this Sunday. > add a new optimizer for query correlation discovery and optimization > -------------------------------------------------------------------- > > Key: HIVE-2206 > URL: https://issues.apache.org/jira/browse/HIVE-2206 > Project: Hive > Issue Type: New Feature > Reporter: He Yongqiang > Assignee: Yin Huai > Attachments: Queries, YSmartPatchForHive.patch > > > reference: > http://www.cse.ohio-state.edu/hpcs/WWW/HTML/publications/papers/TR-11-7.pdf -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira