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Multi-data-source data query method and system

A data query, multi-data source technology, applied in the database field, can solve problems such as complexity and poor maintainability

Pending Publication Date: 2021-05-18
NARI INFORMATION & COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current traditional data query method will become more complicated to apply, and the readability and maintainability of the code will become worse.

Method used

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  • Multi-data-source data query method and system
  • Multi-data-source data query method and system
  • Multi-data-source data query method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the present invention provides a multi-data source data query method, comprising the following steps:

[0022] (1) Define the identifier

[0023] FQL identifiers are used to represent FQL keywords, class names, object attribute names, and parameter names. Identifiers include 26 English letters, numbers, underscores (_), pound signs (#), dollar signs ($), Chinese characters, etc. FQL identifiers cannot start with a number or a dollar sign ($). Generally speaking, a backslash (\) followed by a character is used in an FQL string to represent an escape character, such as (\") for a double quote, (\') for a single quote, (\t) for a Tab character. In addition, in a string, you can use two consecutive single quotation marks to represent a single quotation mark, such as (") to represent a single quotation mark. The following are legal identifiers:

[0024] ·Hello World

[0025] ·_Hello_China

[0026] China

[0027] (2) FQL defines the followin...

Embodiment 2

[0132] A multi-data source data query system is provided, including:

[0133] Definition module: used to define identifiers; define basic data types; define basic query statements; define set operations;

[0134] Query module: used for defined identifiers, basic data types, basic query statements and set operations to call OFA components through the data interface to query data from different data sources.

[0135] The present invention provides a standard query language Falcon Query Language (FQL) provided for the object / database mapping component Object Access Foundation (OAF component). Provide a single query interface for data in different databases, effectively avoiding the cumbersome process of programming languages ​​and databases.

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Abstract

The invention discloses a multi-data-source data query method. The method comprises the following steps: defining an identifier; defining a basic data type; defining a basic query statement; defining a set operation; and adopting the defined identifier, the basic data type, the basic query statement and the set operation to call the OFA component through the data interface to query data of different data sources. Data query and retrieval of multiple data sources are achieved through cooperative use of the user-defined FQL language and the OFA component, development and maintenance are easy, and query efficiency is higher.

Description

technical field [0001] The invention belongs to the technical field of databases, in particular to a multi-data source data query method. Background technique [0002] With the development of information technology, business requirements have become more complex, and the types of data to be processed and data sources have become more diverse. The current traditional data query methods will become more complicated to apply, and the readability and maintainability of the code will also become worse. Contents of the invention [0003] The purpose of the present invention is to provide a multi-data source data query method, which can suppress the resonance of the port ship power supply system. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] In the first aspect, a multi-data source data query method is provided, including: [0006] define identifier; [0007] define basic data types; [0008] Define the basic...

Claims

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Application Information

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IPC IPC(8): G06F16/242G06F16/245
CPCG06F16/2445G06F16/245
Inventor 俞珍秒薛飞童霏
Owner NARI INFORMATION & COMM TECH
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