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| <p>DataMap is a data structure that can be used to accelerate certain query of the table. Different DataMap can be implemented by developers. |
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| <li>IndexDataMap: DataMap that leverages index to accelerate filter query</li> |
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| <li>preaggregate: A type of MVDataMap that do pre-aggregate of single table</li> |
| <li>timeseries: A type of MVDataMap that do pre-aggregate based on time dimension of the table</li> |
| <li>class name IndexDataMapFactory implementation: Developer can implement new type of IndexDataMap by extending IndexDataMapFactory</li> |
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