View-based data access system and method

A technology of data access and data access layer, applied in the field of view-based data access system

Active Publication Date: 2011-11-23
HUNAN CRRC TIMES SIGNAL & COMM CO LTD
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  • Abstract
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[0117] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0118] as attached Figure 4 , 5 As shown in , 6, a specific embodiment of the application of a view-based data access system and method of the present invention to database access in the field of computer information technology is given. The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0119] The view-based data access system of the present invention is based on views, an...

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Abstract

The invention discloses a view-based data access system and method. An interface element is connected with a data access layer, an object creating element of the data access layer creates a data access element, the data access element comprises a complex view element and a simple view element; the data access element generates an SQL (Structured Query Language) operation statement, the data access element is connected with a database interface, the database interface transmits the SQL operation statement to a relational database through a relational database connecting module, the relational database executes the SQL operation statement and obtains an inquiry statement defined by a data attribute from a data access element object as well as transmits the inquiry statement to the relational database, the relational database executes the inquiry statement; the relational database connecting module transmits data returned by the inquiry statement to the data access element; and the data access element transmits an obtained data source to the interface element for displaying. According to the invention, work amount of developers is effectively reduced and whole development cycle can be shortened.

Description

technical field [0001] The invention relates to the technical field of computer data access, in particular to a view-based data access system and method applied in the field of computer information. Background technique [0002] Currently, there are several methods for data access based on relational databases: [0003] (1) Embedded SQL code [0004] figure 1 The method adopted in is that the SQL (Structured Query Language) code is directly embedded in the business class. This strategy is aimed at rapid development of small systems. But its disadvantage is also obvious, SQL code is written in the source code, which means that any simple change, such as changing a column name in a table in the database, must modify the source code. This modification is acceptable for a small system, but for large and medium-sized systems, this defect is extremely serious. [0005] (2) The business class establishes an independent data class [0006] figure 2 The method adopted in is th...

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Application Information

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IPC IPC(8): G06F17/30
Inventor 吴卫平杨玻雅杨献刘旭君周晓
Owner HUNAN CRRC TIMES SIGNAL & COMM CO LTD
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