Query processing and optimization in distributed database. Query processing in distributed database free download as powerpoint presentation. As shown in figure 1, query processing fills the gap between database query. A multimedia database management system dbms provides a suitable environment for using and managing the multimedia database. 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. Approximate query processing is a new feature family. Request pdf query processing in multimedia databases a multimedia database management system dbms provides a suitable environment for using and.
However, the last decade has seen significant research in defining query. Query processing in objectoriented database systems 1994. Query processing in distributed database system ieee. A database is an active entity, whereas data is said to be passive, on which the database works and organizes. Lee t, sheng l, balkir n, alhamdani a, ozsoyoglu g and ozsoyoglu z 2000 query processing techniques for multimedia presentations, multimedia tools. Mars represents the content of multimedia objects by a collection of features e. It provides support for multimedia data types, and facilitate for creation, storage, access, query and control of a multimedia database.
A database system is entirely different than its data. Distributed query processing is an important factor in the overall performance of a distributed database system. An introduction to application development for developers who are new to oracle database. Query optimization for distributed database systems robert. A multimedia database management system mmdbms is a framework that manages different types of data potentially represented in a wide diversity of formats on a wide array of media sources.
Fundamentals of database systems ramez elmasri, shamkant b. Query processing in dbms steps involved in query processing in dbms how is a query gets processed in a database. Dbms also stores metadata, which is data about data. The handbook of research on innovations in database technologies and applications. Traditional techniques work well for databases with standard, singlesite relational structures, but databases. Query processing is a procedure of transforming a highlevel query such as sql into a correct and efficient execution plan expressed in lowlevel language.
Whenever the author is discussing matters of text retrieval or simple issues such as moment. The multimedia query processor has to bridge the gap. Query processing in distributed database oracle database. What are good resources for learning about distributed. Principles of database query processing for advanced. The query execution engine takes a query evaluation plan, executes that plan, and returns the answers to the query.
A relational algebra expression may have many equivalent expressions. Multimedia database consume a lot of processing time, as well as bandwidth. Traditional techniques work well for databases with standard, singlesite relational structures, but databases containing more complex and diverse types. Query processing in multimedia databases scialert responsive. The arrangement of data transmissions and local data processing is known as a distribution strategy for a query. Query processing in a distributed system requires the transmission f data between computers in a network. The first generation of objectoriented dbmss did not provide declarative query capabilities.
The acquisition, generation, storage and processing of multimedia data. Multimedia query processing in extensible databases. Intelligent query processing sql server microsoft docs. In this paper, we consider the problem of querying multimedia presentations based on content information. Multimedia databases an overview sciencedirect topics. This book teaches query processing techniques for multimedia, objectoriented, deductive, parallel, and distributed databases, as well as heterogeneous multidatabase systems, fuzzy relational databases, and techniques for different types of unstructured data. Whenever the author is discussing matters of text retrieval or simple issues such as moment calculations, he will go into great detail. Chapter 19 introduces the basics of query processing. Using this notion of a structure, they are able to define indexing structures for processing queries, methods to relax queries when answers do not exist to those queries, as well as sound, complete and terminating procedures to answer such queries. This book on multimedia database systems sometimes covers issues at a low level, sometimes at a high level.
Current and future trends provides a wide compendium of references to topics in the field of database. Efficient query refinement in multimedia databases. Our presentation on spatial databases and multimedia databases has been. One of the basic functionalities of database management systems dbmss is to be able to process declarative user queries. They supply potential answers to many questions that have been raised for new types of database. A multimedia database management system dbms provides support for the creation, storage, access, querying and control of a multimedia database. Multimedia query processing in extensible databases arjen p. Below you may see the list of blogs, the are the most relevant to the query processing. The database interface is responsible for starting the content query processing.
The aim of query processing is to find information in one or more databases and deliver it to the user quickly and efficiently. Query processing query processing is a procedure of transforming a highlevel query such as sql into a correct and efficient execution plan expressed in lowlevel language. Multimedia database management systems artech house. Querying multimedia data sources and databases university of. Since mediabased evaluation yields similarity values, results to a multimedia database query, q y 1, y n, is defined as an ordered list s q of n tuples of the form. It aggregates across large datasets where responsiveness is more critical than absolute precision. Chapter 6 explains different types of multimedia queries, the methodologies for processing them and the language features for describing them. The main goal of this book is to try to bridge the gap between the database. The main and original function of the multimedia database management system mmdbms is the possibility to execute contentbased query, because the visual information is very important in the. We conclude the survey with a discussion of query processing and query optimization techniques. A query processing select a most appropriate plan that is used in responding to a database request.
Distributed and parallel databases provides such a focus for the presentation and dissemination of new research results, systems development efforts, and user experiences in distributed and parallel database. The chapters of this book provide an excellent snapshot of current research and development activities in the area of query processing and optimization. Query processing query processing would mean the entire process or activity which involves query translation into low level instructions, query optimization to save resources, cost. We begin with a brief introduction to query optimization in relational database system. Advanced database management system advanced dbms topics. Multimedia database a multimedia database is a controlled collection of multimedia data items such as text, images, graphic objects, video and audio. In addition, the book serves as essential reading material for computer professionals who are in or moving to the area of multimedia databases. Query processing in a database system, it is assumed that the reader possesses basic textbook knowledge of database query languages, in particular of relational algebra, and of file systems, including some basic knowledge of index structures. Multimedia database management systems can be used as a text for graduate students and researchers working in the area of multimedia databases. Explains general concepts behind development with oracle database, introduces basic features of sql and plsql, provides references to indepth information elsewhere in oracle database. Using this notion of a structure, they are able to define indexing structures for processing queries, methods to relax queries when answers do not exist to those queries, as well as sound, complete and terminating procedures to answer such queries and their relaxations, when appropriate. Here i will enlist the most useful and relevant resources about query processing and optimization, from my point of view.
Principles of multimedia database systems guide books. An earlier survey of queryprocessing techniques appears in jarke and koch 1984. Each local query is translated into queries over the corresponding local database system 3. Query processing in multimedia databases request pdf. I recommend this book for you principles of database query processing for advanced applications the aim of query processing is to find information in one or more databases. The display specifications and the result of the content query processing are sent as inputs to the display. We believe that presentations should become an integral part of multimedia database systems and users should be able to store, query, and, possibly, manipulate multimedia presentations using a single database. Query processing and optimization in modern database. A structured multimedia database system imposes a certain mathematical structure on the set of featuresstates. Part 8 focuses on query processing and database performance tuning.
1511 600 127 1351 667 145 1058 460 1261 790 1463 176 83 1498 524 15 796 696 898 87 527 506 161 277 1006 569 100 222 665 1334 616 840 614