Filtering Data Streams for Entity-Based Continuous Queries
نویسندگان
چکیده
منابع مشابه
Processing Continuous Queries on Sensor-Based Multimedia Data Streams by Multimedia Dependency Analysis and Ontological Filtering
We present a mathematical model of multimedia data streams and a framework for multimedia functional dependency analysis. The dual objectives are to effectively design multimedia data streams schema and to efficiently process continuous queries on sensor-based multimedia data streams. To further improve query processing, we introduce the concept of ontological filtering. A software tool to add ...
متن کاملMultiple Continuous Queries Evaluation over Data Streams
Query processing for data streams should be continuous and rapid, which requires strict time constraint. In most previous researches, in order to guarantee this constraint, the evaluation order of join predicates in a continuous query is optimized by a greedy. However, the greedy strategy traces only the first promising plan, so that it often finds a sub-optimal plan. This paper proposes an imp...
متن کاملModels and Operators for Continuous Queries on Data Streams
of the Dissertation Models and Operators for Continuous Queries on Data Streams
متن کاملA Temporal Foundation for Continuous Queries over Data Streams
Despite the surge of research in continuous stream processing, there is still a semantical gap. In many cases, continuous queries are formulated in an enriched SQL-like query language without specifying the semantics of such a query precisely enough. To overcome this problem, we present a sound and precisely defined temporal operator algebra over data streams ensuring deterministic query result...
متن کاملSupporting Sliding Window Queries for Continuous Data Streams
Although traditional databases and data warehouses have been exploited widely to manage persistent data, a large number of applications from sensor network need functional supports for transient data in the continuous data stream. One of the crucial functions is to summarize the data items within a sliding window. A sliding window contains a fixed width span of data elements. The data items are...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Knowledge and Data Engineering
سال: 2010
ISSN: 1041-4347
DOI: 10.1109/tkde.2009.63