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The Study and Implementation of Temporal Data Management Technology Based on Temporal Middleware

Author: HeCheng
Tutor: LiShuQin
School: Northwest University of Science and Technology
Course: Applied Computer Technology
Keywords: Temporal database TempDB Relational database management system Tense argument Now Uncertainty
CLC: TP311.13
Type: Master's thesis
Year: 2011
Downloads: 15
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Abstract


With the dynamic changes of the real world, information corresponding temporal attributes. Traditional relational database state expression semantics, there are many difficulties the temporal database added a two-dimensional state transition to store and manage data on its basis, and the introduction of state variables now more convenient to characterize the effective time end point can not be determined, however complex semantic but also brought the issue of uncertainty in the value of the different contexts and results. At present, the practice and application of the temporal database is relatively backward Extension adds temporal data management to deal with the temporal information in the applications, in the the mainstream relational data model is the direction of the current worth considering. Tempdb is the best performance on behalf of the prototype system is still flawed, but support the effective time of uncertainty. In this paper, previous good ideas and results, the use of middleware technology to build a support uncertain temporal information processing temporal data management demonstration platform for the the subsequent temporal application and expansion of the ideas and methods. The main contents are as follows: (1) temporal data management middleware-based platform. Defects, this paper temporal information processing of the data taking into account the tense and traditional RDBMS-depth study of the non-temporal RDBMS tense processing ideas and strategies, and lightweight relational database MySQL as the underlying database, integrated state intermediate pieces of TempDB algorithm to construct a temporal data management demonstration platform. On the one hand, it is compatible with the mature relational database technology, to support the state the query language ATSQL2 and its conversion to the standard SQL language; On the other hand, it encapsulates the dimension of time dealing with the details, the time expression more in line with people's habits of mind temporal information, displaying the middleware technology processing feasibility, efficiency and convenience. (2) based on temporal complex semantic change yuan Now tense uncertainty of the query results. The first comprehensive analysis of the state variables Now, in the past, in the future the semantics and the temporal uncertainty of the results, followed by the introduction of several reference combined with probability theory thinking of building uncertain temporal information processing model, making With the judgment of the qualitative and quantitative uncertainty, and then discuss the realization of the model on the platform, expanding the ability of the platform for the effective treatment of uncertainties. (3) temporal data management personnel to verify the platform as an example, the experimental results show that: better platform compatible with standard SQL language and non-time-state business logic platform and supports all kinds of tense action, when good application value in the organization and management of state data.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Program design,software engineering > Programming > Database theory and systems
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