Parallel Skyline Queries
نویسندگان
چکیده
منابع مشابه
Parallel Computation of Skyline and Reverse Skyline Queries Using MapReduce
The skyline operator and its variants such as dynamic skyline and reverse skyline operators have attracted considerable attention recently due to their broad applications. However, computations of such operators are challenging today since there is an increasing trend of applications to deal with big data. For such data-intensive applications, the MapReduce framework has been widely used recent...
متن کاملSkyline Queries
DEFINITION: Given a set of points p1, p2, ......., pn, the skyline query returns a set of points P, called as the skyline points, such that any point pi ∈ P is not dominated by any other point in the dataset. A point p1 dominates another point p2, if p1 is not worse than p2 in all dimensions and p1 is better than p2 in at least one dimension. In other words, a point p1 dominates another point p...
متن کاملSemi-Skyline Optimization of Constrained Skyline Queries
Skyline evaluation techniques (also known as Pareto preference queries) follow a common paradigm that eliminates data elements by finding other elements in a data set that dominate them. Nowadays already a variety of sophisticated skyline evaluation techniques are known, hence skylines are considered a well researched area. On the other hand, the skyline operator does not stand alone in databas...
متن کاملGeo-Social Skyline Queries
By leveraging the capabilities of modern GPS-equipped mobile devices providing social-networking services, the interest in developing advanced services that combine location-based services with social networking services is growing drastically. Based on geo-social networks that couple personal location information with personal social context information, such services are facilitated by geo-so...
متن کاملCaching Dynamic Skyline Queries
Given a query tuple q, the dynamic skyline query retrieves the tuples that are not dynamically dominated by any other in the data set with respect to q. A tuple dynamically dominates another, w.r.t. q, if it has closer to q’s values in all attributes, and has strictly closer to q’s value in at least one. The dynamic skyline query can be treated as a standard skyline query, subject to the transf...
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ژورنال
عنوان ژورنال: Theory of Computing Systems
سال: 2015
ISSN: 1432-4350,1433-0490
DOI: 10.1007/s00224-015-9627-3