hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Carl Steinbach (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HIVE-1940) Query Optimization Using Column Metadata and Histograms
Date Tue, 12 Jun 2012 00:16:42 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1940?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Carl Steinbach resolved HIVE-1940.
----------------------------------

    Resolution: Duplicate

Resolving this as a duplicated of HIVE-1938 and HIVE-1362.
                
> Query Optimization Using Column Metadata and Histograms
> -------------------------------------------------------
>
>                 Key: HIVE-1940
>                 URL: https://issues.apache.org/jira/browse/HIVE-1940
>             Project: Hive
>          Issue Type: New Feature
>          Components: Metastore, Query Processor, Statistics
>            Reporter: Anja Gruenheid
>         Attachments: Agruenheid_ideas11.pdf, HiveMetaStore.pdf
>
>
> The current basis for cost-based query optimization in Hive is information gathered on
tables and partitions. To make further improvements in query optimization possible, the next
step is to develop and implement possibilities to gather information on columns as discussed
in issue HIVE-33. After that, an implementation of histograms is a possible option to use
and collect run-time statistics. Next to the actual implementation of these features, it is
also necessary to develop a consistent storage model for the MetaStore.

--
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

        

Mime
View raw message