Results 181 to 190 of about 459,743 (229)
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2018
While being eminently useful in a wide variety of application domains, the high expressiveness of graph queries makes them hard to optimize and, hence, challenging to process efficiently. We discuss a number of state-of-the-art approaches which aim to overcome these challenges, focusing specifically on planning, optimization, and execution of two ...
Semih Salihoglu, Nikolay Yakovets
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While being eminently useful in a wide variety of application domains, the high expressiveness of graph queries makes them hard to optimize and, hence, challenging to process efficiently. We discuss a number of state-of-the-art approaches which aim to overcome these challenges, focusing specifically on planning, optimization, and execution of two ...
Semih Salihoglu, Nikolay Yakovets
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ACM SIGMOD Record, 1994
Many applications require the ability to manipulate sequences of data. We motivate the importance of sequence query processing, and present a framework for the optimization of sequence queries based on several novel techniques. These include query transformations, optimizations that utilize meta-data, and caching of intermediate results.
RamakrishnanRaghu +2 more
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Many applications require the ability to manipulate sequences of data. We motivate the importance of sequence query processing, and present a framework for the optimization of sequence queries based on several novel techniques. These include query transformations, optimizations that utilize meta-data, and caching of intermediate results.
RamakrishnanRaghu +2 more
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Data Stream Query Processing [PDF]
21st International Conference on Data Engineering (ICDE'05), 2003 This tutorial provides a comprehensive and cohesive overview of the key research results in the area of data stream query processing, both for SQL-like and XML query languages.
Divesh Srivastava, Nick Koudas
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Abstraction in query processing
Journal of the ACM, 1991Summary: Possible simplifications in query processing are investigated if, consciously, it is agreed to use query languages of limited power (i.e., weaker and proper sublanguages of first-order language). In such a situation, it is frequently possible to transform data in the database into some other form that is not necessarily logically equivalent to
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Query Processing in Spatial-Query-by-Sketch [PDF]
Journal of Visual Languages & Computing, 1997 Abstract Spatial-Query-by-Sketch is the design of a query language for geographic information systems. It allows a user to formulate a spatial query by drawing the desired configuration with a pen on a touch-sensitive computer screen and translates this sketch into a symbolic representation that can be processed against a geographic database.
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2002
Publisher Summary This chapter focuses on the processing techniques used for evaluating queries on spatial databases. This chapter discusses the design and analysis of input-output (I/O) algorithms—also called external algorithms or physical operators. Their common feature is to manipulate large volumes of objects stored on external devices.
Philippe Rigaux +2 more
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Publisher Summary This chapter focuses on the processing techniques used for evaluating queries on spatial databases. This chapter discusses the design and analysis of input-output (I/O) algorithms—also called external algorithms or physical operators. Their common feature is to manipulate large volumes of objects stored on external devices.
Philippe Rigaux +2 more
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Cognitive Processes in Query Generation [PDF]
, 2011 Known-item search is the search for a specific document that is known to exist. This task is particularly important in Personal Information Management (PIM), where it is the most common search activity. A major obstacle to research in search technologies for PIM is the lack of publicly accessible test corpora.
Hauff C., Houben G.-J.
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Query Processing and Optimization
2000The ultimate purpose of a data warehouse is to support queries by end users who want to analyze the available information for an organization. However, from a more abstract point of view, queries are not only processed at the data warehouse back end.
Panos Vassiliadis +3 more
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Distributed Processing of Similarity Queries
Distributed and Parallel Databases, 2001zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yannis Manolopoulos +1 more
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Extending query languages for in-network query processing
Proceedings of the 10th ACM International Workshop on Data Engineering for Wireless and Mobile Access, 2011Sensor networks have become ubiquitous and their proliferation in day-to-day life provides new research challenges. Sensors deployed at forest sites, high performance facilities, or areas striken by environmental, or other, phenomena, are only a few representative examples.
George Valkanas +4 more
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