Precise Detection and Proper Handling of View Maintenance Anomalies in a Multidatabase Environment

نویسندگان

  • Rongquen Chen
  • Weiyi Meng
چکیده

Suppose further two local updates in-sert((2, 5), R 2) and delete((5, 6), R 3) occurred before the maintenance sub-queries for insert((1, 2), R 1) are evaluated by S 2 and S 3 , respectively, and their corresponding notifications are stored right after the notification for insert((1, 2), R 1) in EQ(V) in the given order. (2) The maintenance for insert((2, 5), R 2):

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Markov Model for Performance Evaluation of Coal Handling Unit of a Thermal Power Plant

The present paper discusses the development of a Markov model for performance evaluation of coal handling unit of a thermal power plant using probabilistic approach. Coal handling unit ensures proper supply of coal for sound functioning of thermal Power Plant. In present paper, the coal handling unit consists of two subsystems with two possible states i.e. working and failed. Failure and repair...

متن کامل

A Compensation-based Approach for Materialized View Maintenance in Distributed Environments

Data integration over multiple heterogeneous data sources has become increasingly important for modern applications. The integrated data is usually stored in materialized views (MV) to allow better access, performance and high availability. MV must be maintained after the data sources change. In a loosely-coupled environment, such as the Data Grid, the data sources are autonomous. Hence the sou...

متن کامل

Periodic flexible maintenance planning in a single-machine production environment

Preventive maintenance is the essential part of many maintenance plans. From the production point of view, the flexibility of the maintenance intervals enhances the manufacturing efficiency. On the contrary, the maintenance departments tend to know the timing of the long term maintenance plans as certain as possible. In a single-machine production environment, this paper proposes a simulation–o...

متن کامل

Multiple Dental Anomalies in Primary and Permanent Dentition: A Case Report

Dental anomalies are rare findings that may affect development of occlusion and early intervention may be required. Here, a case of multiple anomalies in primary and perma‌nent dentitions is reported. The patient referred to the dental center with the chief complaint of multiple tooth decay. In the oral examination, the rare case of triplica‌tion between the right geminated man-dibular A and...

متن کامل

Maintenance and Work-rest Scheduling in Human-machine System According to Fatigue and Reliability

Most manufacturers use human-machine systems to produce high-quality products. Dealing with human-machine systems is very complicated since not only machines should be utilized in proper condition but also appropriate environment should be provided for human resources. Most manufacturers have a maintenance plan for machines but many of them do not have a proper work-rest schedule for human reso...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1997