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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 updated HIVE-1940:
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Attachment: Agruenheid_ideas11.pdf
Query Optimization Using Column Metadata and Histograms
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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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