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首页> 外文期刊>Journal of computer sciences >Memory Storage Issues of Temporal Database Applications on Relational Database Management Systems
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Memory Storage Issues of Temporal Database Applications on Relational Database Management Systems

机译：关系数据库管理系统上的临时数据库应用程序的内存存储问题

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Problem statement: Many existing database applications manage time-varying data. These database applications are referred to as temporal databases or time-oriented database applications that are considered as repositories of time-dependent data. Many proposals have been introduced for developing time-oriented database applications, some of which suggest building support for Temporal Database Management Systems (TDBMS) on top of existing non-temporal DBMSs, while others suggest modifying the models of exiting DBMSs or building TDBMS from scratch. Approach: This study addressed several issues concerning developing a technique that enables database designers to understand the way in which time-varying behavior can be modeled and mapped into tabular form. Results: Conventional DBMSs do not have the capability to record and process time-varying aspects of the real world. With growing sophistication of DBMS applications, the lack of temporal support in conventional DBMS raises serious problems when used to develop temporal database. The technique of understanding how to think about time and represent it in formal systems is the topic of this study. We examined how to implement time-varying application in the SQL structured query language by introducing temporal data concepts that need to be simulated in DBMSs which lack temporal supports. We proposed a temporal data model that combines the features of previous temporal models and that reduces the cost of memory storage. Conclusion: We proposed a technique for implementing temporal database on top of exiting non-temporal DBMS. This technique includes five main areas. These areas are temporal database conceptual design, temporal database logical design, integrity constraints preventions in temporal database, modifying and querying temporal database. We proposed a data model for the temporal database based on the data models which are discussed in literature.
机译：问题陈述：许多现有的数据库应用程序管理时变数据。这些数据库应用程序被称为时间数据库或面向时间的数据库应用程序，它们被视为时间相关数据的存储库。为开发面向时间的数据库应用程序引入了许多建议，其中一些建议在现有的非临时DBMS之上建立对临时数据库管理系统（TDBMS）的支持，而其他建议则建议修改现有DBMS的模型或从头开始构建TDBMS。 。方法：这项研究解决了与开发一种技术有关的几个问题，该技术使数据库设计人员能够理解可以将时变行为建模并映射为表格形式的方式。结果：常规的DBMS不能记录和处理现实世界中随时间变化的方面。随着DBMS应用程序的日益成熟，常规DBMS中缺乏时态支持会在开发时态数据库时引发严重的问题。理解如何思考时间并在正式系统中表示时间的技术是本研究的主题。我们通过介绍需要在缺乏时态支持的DBMS中进行仿真的时态数据概念，研究了如何在SQL结构化查询语言中实现时变应用程序。我们提出了一种时态数据模型，该模型结合了以前的时态模型的特征，并减少了内存存储的成本。结论：我们提出了一种在现有非时间DBMS之上实现时间数据库的技术。该技术包括五个主要领域。这些领域是时态数据库的概念设计，时态数据库的逻辑设计，时态数据库中的完整性约束预防，修改和查询时态数据库。我们基于文献中讨论的数据模型为时态数据库提出了一种数据模型。

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