Download or read book Queries and Query Processing in Object oriented Database Systems written by Dave Detlef Straube and published by Department of Computing Science, University of Alberta. This book was released on 1991 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Query Processing in Database Systems written by W. Kim and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an anthology of the results of research and development in database query processing during the past decade. The relational model of data provided tremendous impetus for research into query processing. Since a relational query does not specify access paths to the stored data, the database management system (DBMS) must provide an intelligent query-processing subsystem which will evaluate a number of potentially efficient strategies for processing the query and select the one that optimizes a given performance measure. The degree of sophistication of this subsystem, often called the optimizer, critically affects the performance of the DBMS. Research into query processing thus started has taken off in several directions during the past decade. The emergence of research into distributed databases has enormously complicated the tasks of the optimizer. In a distributed environment, the database may be partitioned into horizontal or vertical fragments of relations. Replicas of the fragments may be stored in different sites of a network and even migrate to other sites. The measure of performance of a query in a distributed system must include the communication cost between sites. To minimize communication costs for-queries involving multiple relations across multiple sites, optimizers may also have to consider semi-join techniques.

Download or read book Technical Report TR 90 33 Queries and Query Processing in Object oriented Database Systems written by Univ. of Alberta. Dept. of Computing Science and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Research on Innovative Database Query Processing Techniques written by Yan, Li and published by IGI Global. This book was released on 2015-09-25 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research and development surrounding the use of data queries is receiving increased attention from computer scientists and data specialists alike. Through the use of query technology, large volumes of data in databases can be retrieved, and information systems built based on databases can support problem solving and decision making across industries. The Handbook of Research on Innovative Database Query Processing Techniques focuses on the growing topic of database query processing methods, technologies, and applications. Aimed at providing an all-inclusive reference source of technologies and practices in advanced database query systems, this book investigates various techniques, including database and XML queries, spatiotemporal data queries, big data queries, metadata queries, and applications of database query systems. This comprehensive handbook is a necessary resource for students, IT professionals, data analysts, and academicians interested in uncovering the latest methods for using queries as a means to extract information from databases. This all-inclusive handbook includes the latest research on topics pertaining to information retrieval, data extraction, data management, design and development of database queries, and database and XM queries.

Download or read book Principles of Database Query Processing for Advanced Applications written by Clement T. Yu and published by Morgan Kaufmann. This book was released on 1998 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough presentation of query processing techniques in a broad range of database systems for advanced applications. Provides the most effective query processing techniques and ways to optimize the information retrieval process. Intended for database systems designers creating advanced applications.

Download or read book Index Data Structures in Object Oriented Databases written by Thomas A. Mueck and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Object-oriented database management systems (OODBMS) are used to imple ment and maintain large object databases on persistent storage. Regardless whether the underlying database model follows the object-oriented, the rela tional or the object-relational paradigm, a key feature of any DBMS product is content based access to data sets. On the one hand this feature provides user-friendly query interfaces based on predicates to describe the desired data. On the other hand it poses challenging questions regarding DBMS design and implementation as well as the application development process on top of the DBMS. The reason for the latter is that the actual query performance depends on a technically meaningful use of access support mechanisms. In particular, if chosen and applied properly, such a mechanism speeds up the execution of predicate based queries. In the object-oriented world, such queries may involve arbitrarily complex terms referring to inheritance hierarchies and aggregation paths. These features are attractive at the application level, however, they increase the complexity of appropriate access support mechanisms which are known to be technically non-trivial in the relational world.

Download or read book Introduction to Object Oriented Databases written by Won Kim and published by . This book was released on 2008-07 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Object-Oriented Databases provides the first unified and coherent presentation of the essential concepts and techniques of object-oriented databases. It consolidates the results of research and development in the semantics and implementation of a full spectrum of database facilities for object-oriented systems, including data model, query, authorization, schema evolution, storage structures, query optimization, transaction management, versions, composite objects, and integration of a programming language and a database system.The book draws on the author's Orion project at MCC, currently the most advanced object-oriented database system, and places this work in a larger context by using relational database systems and other object-oriented systems for comparison.Won Kim is Director of the Object-Oriented and Distributed Systems Laboratory at Microelectronics and Computer Technology Corporation (MCC) in Austin, Texas.Contents: Introduction. Data Model. Basic Interface. Relationships with Non-Object-Oriented Databases. Schema Modification. Model of Queries. Query Language. Authorization. Storage Structures. Query Processing. Transaction Management. Semantic Extensions. Integrating Object-Oriented Programming and Databases. Architecture. Survey of Object-Oriented Database Systems. Directions for Future Research and Development.

Download or read book Analyzing the Phases of Query Processing written by Deepa Prakash Kapai and published by . This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Databases are fundamental part of managing data. Storing multimedia-based objects like graphics image, videos, audio, etc in databases is a basic need of everyday users. However, storing these objects in the relational databases is not possible because relational databases support single value data. To store these complex objects, object-oriented databases were introduced. Object-oriented databases support all the features of object-oriented programming languages, such as, inheritance, encapsulation, polymorphism, etc, along with other features of the databases. This project provides an introduction to the object-oriented databases along with its features, design of an object model and design of the classes, objects and queries. Another major functionality of a database is to respond to the users, i.e., process user queries. Efficiency with speed is an important feature in today's market. So there is a need to properly process and optimize a query. This project provides the basic idea of hydrid-hash pointer (HP) based approach and multiwavefront (MW) approach for processing the queries. The focus of this project is to design an optimization function and implement this function on Select and Join queries. This project analyzes the performance of the Select and Join queries. Performance factors will include query execution time, memory space requirement and response time. This project makes recommendations for novice object-oriented database developers in developing applications where data retrieval time (execution time plus response time) is an important factor.

Download or read book New Concepts for Parallel Object Relational Query Processing written by Michael Jaedicke and published by Springer Science & Business Media. This book was released on 2001-10-17 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last few years, parallel object-relational database management systems have emerged as the leading data management technology on the market. These systems are extensible by user-defined data types and user-defined functionality for the data. This work focuses on the efficient parallel execution of user-defined functionality. The main contributions describe techniques to support data parallelism for user-defined scalar and aggregate functions and intra-function parallelism for the execution of a scalar function on a large object, and a new technology to provide extensibility with regard to new set-oriented database operations that can efficiently implement user-defined functionality in parallel object-relational database management systems.

Download or read book Parallel Query Processing in Object oriented Database Systems written by Clement H. C. Leung and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Object oriented Database Management System Case Study for Declarative Query Language written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Constructor oriented Query Processing Strategy for NF sup 2 Relational Queries written by Timo Niemi and published by . This book was released on 1997 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "It has been widely recognized that in the context of relational databases the user often wants to see the result of his query as an NF2 relation instead of a 1NF relation. However, user-oriented, mainly SQL-like query languages developed so far are cumbersome to use. This is due to the fact in the context of the NF2 relational model the user has to specify large nested expressions containing restructuring operations. Likewise, several query languages developed for object- oriented databases support the construction of NF2 relations. However, in these languages the user has to specify and nest complicated constructor expressions. We have developed an NF2 relational query interface, called the FRC-interface, which is both expressive and at a very high abstraction level. In this paper we study how the FRC-interface can be implemented by applying constructors automatically so that the user need not to be aware of the existence of constructors at all. The core of the implementation is the so-called NF2 object calculus in terms of which an NF2 relation (an NF2 object) can be constructed from atomic-valued attributes (NF2 objects). In the representations of NF2 objects we use only constructors of type tuple, set, tree and map. Both the schema and instance levels are represented on the basis of them. Our query processing strategy is implemented on top of an exisiting relational dbms (database management system). In it the underlying relational dbms need not be modified in any way."

Download or read book Adaptive Query Processing written by Amol Deshpande and published by Now Publishers Inc. This book was released on 2007 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive Query Processing surveys the fundamental issues, techniques, costs, and benefits of adaptive query processing. It begins with a broad overview of the field, identifying the dimensions of adaptive techniques. It then looks at the spectrum of approaches available to adapt query execution at runtime - primarily in a non-streaming context. The emphasis is on simplifying and abstracting the key concepts of each technique, rather than reproducing the full details available in the papers. The authors identify the strengths and limitations of the different techniques, demonstrate when they are most useful, and suggest possible avenues of future research. Adaptive Query Processing serves as a valuable reference for students of databases, providing a thorough survey of the area. Database researchers will benefit from a more complete point of view, including a number of approaches which they may not have focused on within the scope of their own research.

Download or read book Object Oriented Database Systems Approaches and Architectures written by Prabhu C.s.r. and published by PHI Learning Pvt. Ltd.. This book was released on 2010-11 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This well-received book, now in its third edition, is a comprehensive presentation of the fundamentals of object-oriented database systems (OODBMS). It provides extensive coverage of the different approaches to object data management, including the three major approaches--semantic database systems approach, object-oriented programming language extension approach, and the relational extension approach--as well as the various types of architectures of object-oriented database systems. The book discusses all recent developments in this field, such as the emergence of Java as the dominant object-oriented programming language--resulting in upcoming OODBMS products such as Ozone--and the provision of object-oriented database features in object-relational database systems (ORDBMS) products such as Oracle 9i and DB2. The new edition provides an extensive discussion of PostgreSQL, a popular open source object-oriented database system which has emerged as a viable alternative to expensive commercial database systems such as Oracle. The book is extensively illustrated, which enables students to develop a firm grasp of the underlying concepts. The chapter-end exercises help in testing the students' comprehension of the fundamental principles. The book is primarily meant for students of IT-related programmes having courses in database systems. Computer professionals will also find the book immensely useful.

Download or read book Query Processing in an Object oriented Database System for Software Engineering Applications written by Mark Allan Westra and published by . This book was released on 1993 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Query Processing for Advanced Database Systems written by Johann Christoph Freytag and published by Springer Science & Business. This book was released on 1994 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters of this book provide an excellent snapshot of current research and development activities in the area of query processing and optimization. They supply potential answers to many questions that have been raised for new types of database systems and at the same time reflect the variety of the different approaches taken. The book acts both as a reference for the state of the art in query processing for the "next generation" of database systems, and as a good starting point for anybody interested in understanding the challenging questions in the area. Furthermore, the book will help the reader to gain an in-depth understanding of why efficient query processing is needed for future database systems.

Download or read book Query Processing for Advanced Database Systems written by Johann Christoph Freytag and published by Morgan Kaufmann Publishers. This book was released on 1995 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters of this book provide an excellent snapshot of current research and development activities in the area of query processing and optimization. They supply potential answers to many questions that have been raised for new types of database systems and at the same time reflect the variety of the different approaches taken. The book acts both as a reference for the state of the art in query processing for the "next generation" of database systems, and as a good starting point for anybody interested in understanding the challenging questions in the area. Furthermore, the book will help the reader to gain an in-depth understanding of why efficient query processing is needed for future database systems.