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
Reporter: Anja Gruenheid
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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