A Framework for Evaluating Skyline Queries over Incomplete Data
نویسندگان
چکیده
منابع مشابه
Skyline Queries over Incomplete Data - Cost Models
Skyline queries are a well-known technique for explorative retrieval, multi-objective optimization problems, and personalization tasks in databases. They are widely acclaimed for their intuitive query formulation mechanisms. However, when operating on incomplete datasets, skyline query processing is severely hampered and often has to resort to error-prone heuristics. Unfortunately, incomplete d...
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In recent years, there has been much focus on skyline queries that incorporate and provide more flexible query operators that return data items which are dominating other data items in all attributes (dimensions). Several techniques for skyline have been proposed in the literature. Most of the existing skyline techniques aimed to find the skyline query results by supposing that the values of di...
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The advent of cloud computing redefines the traditional query processing paradigm. Whereas computational overhead and memory constraints become less prohibitive, data privacy, security, and confidentiality concerns become top priorities. In particular, as data owners outsource the management of their data to service providers, query processing over such data has more resources to tap into, yet ...
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Semistructured data are inherently incomplete and their structure does not comply with a strict schema. A query language has to take this into account and allow answers to be incomplete. This paper presents a model of queries over semistructured data that allows for incomplete answers, i.e., answers in which not all the variables of the query are bound. We deene a simple data model that is simi...
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ژورنال
عنوان ژورنال: Procedia Computer Science
سال: 2016
ISSN: 1877-0509
DOI: 10.1016/j.procs.2016.08.030