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From "Yin Huai (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2206) add a new optimizer for query correlation discovery and optimization
Date Wed, 08 Jun 2011 12:45:58 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2206?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yin Huai updated HIVE-2206:
---------------------------

    Attachment: Queries

Two queries (TPC-H Q17 and TPC-H Q18) can be used for testing this optimizer. Q17 is the same
with the query provided in https://issues.apache.org/jira/browse/HIVE-600, but to expose the
correlation, Q18 is modified. With this optimizer, Q17 and Q18 needs 2 and 4 MapReduce jobs,
respectively. Without this optimizer, these two queries need 4 and 8 MapReduce jobs, respectively.

> 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
>         Attachments: Queries, YSmartPatchForHive.patch
>
>
> reference:
> http://www.cse.ohio-state.edu/hpcs/WWW/HTML/publications/papers/TR-11-7.pdf

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