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2000
ACM

Incremental Update to Aggregated Information for Data Warehouses over Internet

10 years 5 months ago
Incremental Update to Aggregated Information for Data Warehouses over Internet
We consider the view maintenance problem in a web-based environment, in which clients query information from databases, stored in the form of materialized data warehouses, without accessing the original data sources. In addition to base data, data w arehousesalso contain highly aggregated and summarized information suitable for decision support. As changes are made to the data sources, the warehouse views must be updated to re ect a consistent state of the data sources. Recomputation is often too expensive. We describe in this paper an incremental view maintenance method basedon the net c hanges on base table, to maintain the views e ciently in the presence of aggregation and summary information. An architecture of a web-based data w arehousing system is described to minimize the workload of the data warehouse. Finally, w e develop a prototype application utilizing the new maintenance algorithm and conduct a performance study based on the prototype, comparing it with existing maintena...
Miranda Chan, Hong Va Leong, Antonio Si
Added 01 Aug 2010
Updated 01 Aug 2010
Type Conference
Year 2000
Where DOLAP
Authors Miranda Chan, Hong Va Leong, Antonio Si
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