Universal constraining realizing method for real-time internal memory database

An implementation method and real-time memory technology, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve the problems of complex constraint relationships, bloated software codes, high error rate, etc., achieve universality, shorten development cycle, The effect of code error rate reduction
CN1645372AActive Publication Date: 2005-07-27SHANGHAI MUNICIPAL ELECTRIC POWER CO
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI MUNICIPAL ELECTRIC POWER CO
Publication Date
2005-07-27

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Abstract

A method for realizing universal restraint includes inputting and creating standard command of external restraint and checking restraint, inspecting them and then storing created restraint data in memory after memory databank table set up, carrying out operation as if all restraints are satisfied when insertion or refreshing record operation is required on some table, refusing operation as if any external restraint is not satisfied when record deletion operation is required on some table.
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Description

technical field

[0001] The present invention relates to a real-time memory database system, and more particularly, to a method for ensuring constraint processing in a database in the system. Background technique

[0002] Real-time memory database technology has been widely used in communication, control and other fields. Generally, the reading time of the disk for data is on the order of 10-3 seconds, while the reading time for the memory is 10-8 seconds. The real-time in-memory database is characterized by operating all data objects in memory, and the relationship between data objects is also reflected in memory operations, which greatly improves the performance of the system.

[0003] The constraint attribute is one of the important attributes of the table, that is, when the record operation of the table is performed, the legality of the operation should be checked as needed. A mature database system that expresses and handles constraint properties generically and simply...

Claims

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