Dogac / Özsu / Biliris Advances in Object-Oriented Database Systems

1994
ISBN: 978-3-642-57939-4
Verlag: Springer
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, Band 130, 515 Seiten, eBook

Reihe: NATO ASI Subseries F:

Object-oriented database management systems (OODBMSs) have generated significant excitement in the database community in the last decade. This interest stems from a real need for data management support for what are called "advanced application areas" that are not well-served by relational technology. The case for object-oriented technology has been made on three fronts. First is the data modeling requirements of the new applications. Some of the more important shortcomings of the relational systems in meeting the requirements of these applications include: 1. Relational systems deal with a single object type: a relation. A relation is used to model different real-world objects, but the semantics of this association is not part of the database. Furthermore, the attributes of a relation may come only from simple and fixed data type domains (numeric, character, and, sometimes, date types). Advanced applications require explicit storage and manipulation of more abstract types (e.g., images, design documents) and the ability for the users to define their own application-specific types. Therefore, a rich type system supporting user defined abstract types is required. 2. The relational model structures data in a relatively simple and flat manner. Non traditional applications require more complex object structures with nested objects (e.g., a vehicle object containing an engine object).

Zielgruppe

Research

Autoren/Hrsg.

Dogac, Asuman

Özsu, M.Tamer

Biliris, Alexandros

Sellis, Timos

Inhaltsverzeichnis

Section 1: Introduction.- What Makes Object-Oriented Database Management Systems Different.- Object-Oriented Data Models.- Database Management Features.- OODBMS Architecture.- Using an OODBMS.- Implementation Considerations.- Query Processing.- Transactions.- Distributed Databases.- Other Features.- Summary.- Section 2: Models and Formal Languages.- Object-Oriented Data Model Concepts.- The Notion of “Data Model”.- Traditional Data Models and Their Shortcomings.- The Quest for Object-Oriented Data Models.- Basic Properties of OODM.- Additional Properties of OODM.- The Relationship of OODM to Other DBMS Issues.- Current State and Open Issues.- Query Languages for Models with Object-Oriented Features.- Relational Query Languages.- The Complex Objects Model.- The Complex Object Calculus.- Algebraic and Functional Languages.- Other OODM Features.- Conclusions.- Functional Programming Formalisms for OODBMS Methods.- Method Schemas.- The Expressive Power of Method Schemas.- The Typed Lambda Calculus with Equality (TLC=).- The Expressive Power of TLC=.- Conclusions and Some Open Problems.- A Formal Object-Oriented Query Model and an Algebra.- The Data Model.- The Query Model.- Illustrating Examples.- Conclusions.- Section 3: System Implementation Issues.- Optimization of Object-Oriented Query Languages: Problems and Approaches.- Data Model and Query Languages.- Problems in Object-Oriented Query Optimization.- Optimization Techniques.- Some Object-Oriented Optimization Systems.- Summary.- Transaction Models and Transaction Management in Object-Oriented Database Management Systems.- Fundamental Transaction Concepts.- Correctness Criteria.- Transaction Models.- Transactions on ADTs.- Transaction Management in OODBMSs.- Transactions as Objects.- Concluding Remarks.- Object Storage Management Architectures.- Organizing Objects on Disk.- Client-Server Architectures.- Persistence and Programming Languages.- OODBMS Architectures.- Summary.- Active Object Systems.- Active Objects.- Rule Classes.- Events.- Conditions.- Actions.- Execution Models.- Architectural Issues.- Design Issues.- Conclusions.- Object-Oriented Rule Languages and Optimization Techniques.- Relational Rule Languages.- Object-Oriented Rule Languages.- Object-Oriented Target Algebra.- Transformations to Optimize OOA Programs.- Recursive Update Optimization.- Search Strategies to Select a Query Plan.- Conclusions.- The Promise of Distributed Computing and the Challenges of Legacy Information Systems.- World-Wide Computing.- The Challenge of Legacy Information Systems.- Killer Applications for World-Wide Computing.- Object-Orientation and Interoperability.- Dimensions of the Interoperability Problem.- Application Interconnection.- Information Compatibility.- Object-Orientation is Part of the Problem.- Conclusions.- Section 4: Systems and Prototypes.- Open OODB: Architecture and Query Processing Overview.- Computational Model for Extensibility.- Open OODB Architecture.- Extensible Object Query Model.- Status and Conclusions.- METU Object-Oriented DBMS.- MOOD Kernel Implementation.- MOODSQL.- Cost Model Parameters.- Cost Analysis of Basic File Operations.- Cost of Implicit Join Operation.- General Description of the Execution of MOODSQL Queries.- Query Optimization in MOOD.- MoodView, The Graphical User Interface.- Summary.- The Ode Object-Oriented Database Management System: An Overview.- Object-Oriented Database Management Systems.- Ode.- O++.- Storage Manager.- OdeFs.- OdeView.- cql++.- Active Database Facilities.- Flexible Transaction Facilities.- Summary.- Object-Oriented Modeling for Hypermedia Systems Using the VODAK Model Language.- The VODAK Model Language VML.- Modeling of Hypermedia Documents.- Conclusion.- Object Modeling Using Classification in CANDIDE and its Applications.- Application to Heterogeneous Database Integration.- The Storage and Retrieval of Structured Documents.- Natural Language Query Interface to CANDIDE.- Implementation of CANDIDE on Secondary Storage.- Conclusion.- References.