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Database Engineering and Applications, 1999. IDEAS '99. International Symposium Proceedings

4-4 Aug. 1999

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  • Proceedings. IDEAS'99. International Database Engineering and Applications Symposium (Cat. No.PR00265)

    Publication Year: 1999
    Request permission for commercial reuse | PDF file iconPDF (238 KB)
    Freely Available from IEEE
  • Author index

    Publication Year: 1999, Page(s):466 - 467
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    Freely Available from IEEE
  • Incremental maintenance of nested relational views

    Publication Year: 1999, Page(s):197 - 205
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Incremental view maintenance techniques are required for many new types of data models that are being increasingly used in industry. One of these models is the nested relational model that is used in the modelling of complex objects in databases. In this paper, we derive a group of expressions for incrementally evaluating query expressions in the nested relational model. We also present an algorit... View full abstract»

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  • A workflow management systems architecture that support ad-hoc recoveries

    Publication Year: 1999, Page(s):332 - 340
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    Ad-hoc recovery is a phenomenon that occurs in workflow applications when an agent needs to alter the control flow prescribed in the original definition. It is usually caused by unpredictable reasons, such as an unexpected output of some individual tasks, events or exceptions due to the changing environment, etc. Due to its irregularity in nature, ad-hoc recovery in general cannot be dealt with by... View full abstract»

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  • A model for deferred view maintenance

    Publication Year: 1999, Page(s):188 - 196
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Presents a model for deferred maintenance of object-oriented views. Queries that define views are implemented as methods that are invoked to compute the corresponding views. A deferred update reflects to a view only those related modifications that were introduced into the database while that view was inactive. A view is updated by considering modifications performed within all classes along the i... View full abstract»

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  • Transactional coordination agents for composite systems

    Publication Year: 1999, Page(s):321 - 331
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    Composite systems are collections of autonomous, heterogeneous and distributed software applications. In these systems, data dependencies are continuously violated by local operations, and therefore coordination processes are necessary to guarantee overall correctness and consistency. Such coordination processes must be endowed with some form of execution guarantees, which require the participatin... View full abstract»

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  • On a buzzword “extensibility”-what we have learned from the ORIENT project?

    Publication Year: 1999, Page(s):360 - 369
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    To meet the ever challenging requirements of today's applications, both database research and industry are engaged in adding new features to database management systems (DBMSs). As a major effort in this direction, object-relational DBMSs (ORDBMSs) are becoming more and more popular due to their extensibility, i.e., allowing user-defined facilities to be used in the same way as built-in ones. Insp... View full abstract»

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  • Dynamic reorganization of object databases

    Publication Year: 1999, Page(s):110 - 118
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    We consider the problem of optimizing the number of I/O operations by means of an effective clustering, with the objective to overcome deficiencies of existing solutions. Our main objective is to dynamically adapt physical database organizations, online, according to the access patterns of the users without adding significant overhead on processing workload. We propose a clustering schedule that m... View full abstract»

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  • Concurrent maintenance of views using multiple versions

    Publication Year: 1999, Page(s):254 - 258
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (52 KB)

    Materialized views in data warehouses are maintained incrementally, for reasons of efficiency, to present the latest updates to the users. These views are used by many warehouse readers (users) to execute OLAP queries by running several reader sessions and these views are maintained periodically by maintenance transactions. Therefore, there is an inherent problem of maintaining these views while t... View full abstract»

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  • A parallel scalable infrastructure for OLAP and data mining

    Publication Year: 1999, Page(s):178 - 186
    Cited by:  Papers (12)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Decision support systems are important in leveraging information present in data warehouses in businesses like banking, insurance, retail and health care. The multidimensional aspects of a business can be naturally expressed using a multidimensional data model. Data analysis and data mining on these warehouses pose new challenges for traditional database systems. OLAP and data mining operations re... View full abstract»

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  • Locking with different granularities for reads and writes in an MVM system

    Publication Year: 1999, Page(s):311 - 320
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    Investigates the use of a multi-view virtual memory (MVM) in providing efficient locking services for transaction processing or database systems. The locking granularity is customizable by applications and, furthermore, the locking granularities for read and write operations may differ. The system provides for the enforcement of access control protocols on units of a memory region through finite s... View full abstract»

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  • iWebDB-Web site administration based on object-relational database technology

    Publication Year: 1999, Page(s):92 - 97
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (40 KB)

    Since the emergence of the World Wide Web in the year 1990, the number of accessible Web servers, HTML pages, and thereby the amount of accessible data have increased dramatically. Consequently many people around the world are engaged in maintaining a Web server and its content. While creating HTML pages is getting more and more simple, the administration of a Web site is still a time consuming an... View full abstract»

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  • View maintenance after view synchronization

    Publication Year: 1999, Page(s):215 - 223
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    While current view technology assumes that information systems (ISs) do not change their schemas, our Evolvable View Environment (EVE) project addresses this problem by evolving the view definitions affected by IS schema changes, which we call view synchronization. In EVE, the view synchronizer rewrites the view definitions by replacing view components with suitable components from other ISs. Howe... View full abstract»

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  • Towards an architecture for reactive systems using an active real-time database and standardized components

    Publication Year: 1999, Page(s):351 - 359
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    Component-based concepts are being increasingly used in software design since they allow high-quality software to be generated within a short time and hence at low costs. By contrast, component technologies haven't yet provided the means of composing software from components without additional programming. The reason for this lies in the combined transfer of control and data flow and the fact that... View full abstract»

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  • Site-locking protocol for global concurrency control in multidatabase systems

    Publication Year: 1999, Page(s):380 - 384
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (92 KB)

    Much research into managing global transactions in multidatabase systems (MDBS) has been proposed to solve problems of ensuring global serializability. In these methods, a few opportunities are provided to the global transaction to execute concurrently. We concentrate our attention on 1) maintaining a consistent database state that is defined by global integrity constraints, and 2) investigation i... View full abstract»

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  • Self-organization of distributed document archives

    Publication Year: 1999, Page(s):128 - 136
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    Document archives may be regarded as a perfect application arena for unsupervised neural networks because many of the operations computers have to perform on text documents are classification tasks based on noisy patterns. The “noise” originates from the known inaccuracy of mapping free-form natural language to an indexing vocabulary representing the contents of the documents. We descr... View full abstract»

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  • A method of constructing dynamic schema representing the structure of semistructured data

    Publication Year: 1999, Page(s):103 - 108
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The structure of semistructured data is needed in order to query a large amount of semistructured data, although structure cannot be defined a priori. DataGuides and shape have been proposed to represent the structure of semistructured data. As these can behave as schema from the point of view of representing the structure of data, and are changed according to the existence of objects, these are c... View full abstract»

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  • Hash-based symmetric data structure and join algorithm for OLAP applications

    Publication Year: 1999, Page(s):231 - 238
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The star schema is often used in dimensional approaches applied to OLAP applications. The fact table in the star schema typically contains a huge amount of data. When some of the dimension tables are also very large, it may take too much time and storage to join the fact table with these dimension tables. The performance of the join algorithm becomes critical under such a condition. The fluent joi... View full abstract»

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  • Efficient mining for association rules with relational database systems

    Publication Year: 1999, Page(s):148 - 155
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    With the tremendous growth of large scale data repositories, a need for integrating the exploratory techniques of data mining with the capabilities of relational systems to efficiently handle large volumes of data has now risen. We look at the performance of the most prevalent association rule mining algorithm-Apriori with IBM's DB2 Universal Database system. We show that a multi-column (MC) data ... View full abstract»

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  • New access index for fast execution of conjunctive queries over text data

    Publication Year: 1999, Page(s):248 - 253
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    Complex queries with multiple conjunctive (AND) predicates have attracted increasing attention for their importance in OLAP systems. The signature index is ideal for the fast execution of queries involving multiple conjunctive predicates. However, previous signature-based methods did not separate the signatures from different attributes. We have developed a signature-augmented access index, called... View full abstract»

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  • Improving OLAP performance by multidimensional hierarchical clustering

    Publication Year: 1999, Page(s):165 - 177
    Cited by:  Papers (6)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Data warehousing applications cope with enormous data sets in the range of Gigabytes and Terabytes. Queries usually either select a very small set of this data or perform aggregations on a fairly large data set. Materialized views storing pre-computed aggregates are used to efficiently process queries with aggregations. This approach increases resource requirements in disk space and slows down upd... View full abstract»

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  • Integration of semistructured data with partial and inconsistent information

    Publication Year: 1999, Page(s):44 - 52
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Data integration from several sources has gained considerable attention with the recent popularity of the World Wide Web. In the real world, some information may be missing (i.e. partial) and some may be inconsistent from several sources. How to obtain information that is as complete as possible and how to detect inconsistency from these sources is thus an interesting question. Most existing work ... View full abstract»

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  • Recovery protocols in multi-agent probabilistic reasoning systems

    Publication Year: 1999, Page(s):302 - 310
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Introduces a probabilistic relational data model as the basis for developing multi-agent probabilistic reasoning systems. Since our model subsumes the traditional relational data model, it immediately follows that we can take full advantage of the existing distributed and concurrency control techniques to address the undesirable characteristics exhibited by current multi-agent probabilistic reason... View full abstract»

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  • The challenges of genome information management: a practical experience

    Publication Year: 1999, Page(s): 465
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8 KB)

    First Page of the Article
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  • A heuristics-based approach to query optimization in structured document databases

    Publication Year: 1999, Page(s):24 - 33
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    The number of documents published via the World Wide Web in the form of SGML/HTML has been rapidly growing for years. Efficient, declarative access mechanisms for this type of document-structured documents in general-are becoming of great importance. This paper reports our most recent advance in pursuit of the effective processing and optimization of structured document queries, which are importan... View full abstract»

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