Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)最新文献_第4页

Declarative and procedural object-oriented views 声明式和过程式面向对象视图

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754940

R. Busse, Péter Fankhauser

引用次数: 3

Real-time data access control on B-tree index structures 基于b树索引结构的实时数据访问控制

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754962

Tei-Wei Kuo, Chih-Hung Wei, K. Lam

引用次数: 18

An agent-based approach to extending the native active capability of relational database systems 一种基于代理的扩展关系数据库系统原生活动能力的方法

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754954

Lijuan Li, Sharma Chakravarthy

{"title":"An agent-based approach to extending the native active capability of relational database systems","authors":"Lijuan Li, Sharma Chakravarthy","doi":"10.1109/ICDE.1999.754954","DOIUrl":"https://doi.org/10.1109/ICDE.1999.754954","url":null,"abstract":"Event-condition-action (or ECA) rules are used to capture active capability. While a number of research prototypes of active database systems have been built, ECA rule capability in relational DBMSs is still very limited. We address the problem of turning a traditional database management system into a full-fledged active database system without changing the underlying system. The advantages of this approach are: transparency; ability to and active capability without changing the client programs; retain relational DBMS's underlying functionality; and persistence of ECA rules using the native database functionality. We describe how complete active database semantics can be supported on an existing SQL server (Sybase, in our case) by adding a mediator, termed ECA Agent, between the SQL server and the clients. ECA rules are fully supported through the ECA Agent without changing applications or the SQL server. Composite events are detected in the ECA Agent and actions are invoked in the SQL server. Events are persisted in the native database system. ECA Agent is designed to connect to SQL server by using Sybase connectivity products. The architecture, design, and implementation details are presented.","PeriodicalId":236128,"journal":{"name":"Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116541541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Improving the access time performance of serpentine tape drives 改进蛇形磁带机的访问时间性能

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754970

O. Sandstå, Roger Midtstraum

引用次数: 13

Mining optimized support rules for numeric attributes 挖掘数字属性的优化支持规则

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754926

R. Rastogi, Kyuseok Shim

引用次数: 65

Using codewords to protect database data from a class of software errors 使用码字保护数据库数据不受一类软件错误的影响

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754943

P. Bohannon, R. Rastogi, S. Seshadri, A. Silberschatz, S. Sudarshan

{"title":"Using codewords to protect database data from a class of software errors","authors":"P. Bohannon, R. Rastogi, S. Seshadri, A. Silberschatz, S. Sudarshan","doi":"10.1109/ICDE.1999.754943","DOIUrl":"https://doi.org/10.1109/ICDE.1999.754943","url":null,"abstract":"Increasingly, for extensibility and performance, special-purpose application code is being integrated with database system code. Such application code has direct access to database system buffers and, as a result, the danger of data being corrupted due to inadvertent application writes is increased. Previously proposed hardware techniques to protect data from corruption required system calls, and their performance depended on the details of the hardware architecture. We investigate an alternative approach which uses codewords associated with regions of data to detect corruption and to prevent corrupted data from being used by subsequent transactions. We develop several such techniques which vary in the level of protection, space overhead, performance and impact on concurrency. These techniques are implemented in the Dali/spl acute/ main-memory storage manager, and the performance impact of each on normal processing is evaluated. Novel techniques are developed to recover when a transaction has read corrupted data caused by a bad write, and then gone on to write other data in the database. These techniques use limited and relatively low-cost logging of transaction reads to trace the corruption, and may also prove useful when resolving problems caused by incorrect data entry and other logical errors.","PeriodicalId":236128,"journal":{"name":"Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133576303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Enhancing semistructured data mediators with document type definitions 使用文档类型定义增强半结构化数据中介

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754916

Y. Papakonstantinou, P. Velikhov

引用次数: 59

Maintaining data cubes under dimension updates 维护维度更新下的数据集

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754950

Carlos A. Hurtado, A. Mendelzon, A. Vaisman

{"title":"Maintaining data cubes under dimension updates","authors":"Carlos A. Hurtado, A. Mendelzon, A. Vaisman","doi":"10.1109/ICDE.1999.754950","DOIUrl":"https://doi.org/10.1109/ICDE.1999.754950","url":null,"abstract":"OLAP systems support data analysis through a multidimensional data model, according to which data facts are viewed as points in a space of application-related \"dimensions\", organized into levels which conform to a hierarchy. The usual assumption is that the data points reflect the dynamic aspect of the data warehouse, while dimensions are relatively static. However, in practice, dimension updates are often necessary to adapt the multidimensional database to changing requirements. Structural updates can also take place, like addition of categories or modification of the hierarchical structure. When these updates are performed, the materialized aggregate views that are typically stored in OLAP systems must be efficiently maintained. These updates are poorly supported (or not supported at all) in current commercial systems, and have received little attention in the research literature. We present a formal model of dimension updates in a multidimensional model, a collection of primitive operators to perform them, and a study of the effect of these updates on a class of materialized views, giving an algorithm to efficiently maintain them.","PeriodicalId":236128,"journal":{"name":"Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121853307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 209

Using XML in relational database applications 在关系数据库应用程序中使用XML

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754920

S. Malaika

引用次数: 5

The hybrid tree: an index structure for high dimensional feature spaces 混合树:高维特征空间的索引结构

Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337) Pub Date : 1999-03-23 DOI: 10.1109/ICDE.1999.754960

K. Chakrabarti, S. Mehrotra

{"title":"The hybrid tree: an index structure for high dimensional feature spaces","authors":"K. Chakrabarti, S. Mehrotra","doi":"10.1109/ICDE.1999.754960","DOIUrl":"https://doi.org/10.1109/ICDE.1999.754960","url":null,"abstract":"Feature-based similarity searching is emerging as an important search paradigm in database systems. The technique used is to map the data items as points into a high-dimensional feature space which is indexed using a multidimensional data structure. Similarity searching then corresponds to a range search over the data structure. Although several data structures have been proposed for feature indexing, none of them is known to scale beyond 10-15 dimensional spaces. This paper introduces the hybrid tree-a multidimensional data structure for indexing high-dimensional feature spaces. Unlike other multidimensional data structures, the hybrid tree cannot be classified as either a pure data partitioning (DP) index structure (such as the R-tree, SS-tree or SR-tree) or a pure space partitioning (SP) one (such as the KDB-tree or hB-tree); rather it combines the positive aspects of the two types of index structures into a single data structure to achieve a search performance which is more scalable to high dimensionalities than either of the above techniques. Furthermore, unlike many data structures (e.g. distance-based index structures like the SS-tree and SR-tree), the hybrid tree can support queries based on arbitrary distance functions. Our experiments on \"real\" high-dimensional large-size feature databases demonstrate that the hybrid tree scales well to high dimensionality and large database sizes. It significantly outperforms both purely DP-based and SP-based index mechanisms as well as linear scans at all dimensionalities for large-sized databases.","PeriodicalId":236128,"journal":{"name":"Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129174873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 258