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