Filtering algorithms and implementation for very fast publish/subscribe systems
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Continuously adaptive continuous queries over streams
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
Multiple aggregations over data streams
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
On-the-fly sharing for streamed aggregation
Proceedings of the 2006 ACM SIGMOD international conference on Management of data
State-slice: new paradigm of multi-query optimization of window-based stream queries
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Massively multi-query join processing in publish/subscribe systems
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
Scheduling for shared window joins over data streams
VLDB '03 Proceedings of the 29th international conference on Very large data bases - Volume 29
The case for precision sharing
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
Semantic aware RSS query algebra
Proceedings of the 12th International Conference on Information Integration and Web-based Applications & Services
A data stream publish/subscribe architecture with self-adapting queries
OTM'05 Proceedings of the 2005 Confederated international conference on On the Move to Meaningful Internet Systems - Volume >Part I
Towards expressive publish/subscribe systems
EDBT'06 Proceedings of the 10th international conference on Advances in Database Technology
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Recently, a window-based and semantic-aware feeds querying operators to retrieve set of news items satisfying a given condition has been proposed. The use of semantic information improves the relevance of query result at the cost of degrading the efficiency of the system. To benefit from query execution on semantic information while keeping efficiency of the system, we have proposed a multi-query optimization strategy. The proposed MQO strategy accepts semantic news feed queries and examines the relationship that exists between windows defined on queries. Then, a MQE chain is generated based on the window relationship examined for the efficient manipulation of queries. Whenever a new query arrives, it is added to its appropriate chain. To validate the proposed approach, we have developed a prototype and the experimental results show that the use of our approach improves significantly the performance of the system.