The logic of query languages for data streams
Proceedings of the 4th International Workshop on Logic in Databases
Relational languages and data models for continuous queries on sequences and data streams
ACM Transactions on Database Systems (TODS)
Logical foundations of continuous query languages for data streams
Datalog 2.0'12 Proceedings of the Second international conference on Datalog in Academia and Industry
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Relational query languages can effectively express continuous queries on data streams after modest extensions. However, implementing such queries efficiently in data stream management systems requires major changes in execution models and optimization techniques. In particular, finer-granularity execution models that are conducive to effective time-stamp management and response-time optimization must replace databases' relational algebra schemes. This article introduces such a model and uses it to solve the idle-waiting problems of data stream operators, such as unions, joins, and aggregates over windows with slides.