منابع مشابه
Query Performance Optimization in XML Data Warehouses
Decision-support applications aim at facilitating the decision-making process. They collect data from operational databases and various sources, transform them into information available to decision-makers in a consolidated and consistent manner (Kimball & Ross, 2002). Furthermore, the development of the Web 2.0 and the proliferation of multimedia documents contributed to the analysis of data a...
متن کاملQuery Optimization for XML
XML is an emerging standard for data representation and exchange on the World-Wide Web. Due to the nature of information on the Web and the inherent exibility of XML, we expect that much of the data encoded in XML will be semistructured: the data may be irregular or incomplete, and its structure may change rapidly or unpredictably. This paper describes the query processor of Lore, a DBMS for XM...
متن کاملSemantic XML query optimization
Now eXtensible Markup Language (XML) [1] is widely accepted by website constructors and programmers because of its capability and its flexibility in storing and transferring semistructured data. Query transformation is the method used to improve the query execution time of the database system. Some research has been done with XML query transformation. To date, these works concentrate on the str...
متن کاملXML Query Processing and Optimization
In this paper, I summarize my research on optimizing XML queries. This work has two components: the first component is the definition of a logical algebra and logical optimization techniques. This algebra can be translated into different physical algebras such as native or extended-relational algebras. The second component is the design of physical storage structures and physical optimization t...
متن کاملXAL: An Algebra For XML Query Optimization
This paper proposes XAL, an XML ALgebra. Its novelty is based on the simplicity of its data model and its well-defined logical operators, which makes it suitable for composability, optimizability, and semantics definition of a query language for XML data. At the heart of the algebra resides the notion of collection, a concept similar to the mathematician’s monad or functional programmer’s compr...
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ژورنال
عنوان ژورنال: Studies in Informatics and Control
سال: 2016
ISSN: 1220-1766,1841-429X
DOI: 10.24846/v25i2y201604