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Method and system for connecting tables in a plurality of heterogeneous distributed databases

A distributed, database technology, applied in electrical digital data processing, digital data information retrieval, special data processing applications, etc., can solve problems such as high costs, and achieve the effect of improving performance, reducing costs, and reducing communication costs

Inactive Publication Date: 2012-07-11
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, it is often costly to perform join operations between tables in two or more heterogeneous databases

Method used

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  • Method and system for connecting tables in a plurality of heterogeneous distributed databases
  • Method and system for connecting tables in a plurality of heterogeneous distributed databases
  • Method and system for connecting tables in a plurality of heterogeneous distributed databases

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Embodiment Construction

[0025] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be appreciated, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with system and business-related constraints, where these Restrictions vary from implementation to implementation. Furthermore, it should also be understood that such development, while potentially complex and time-consuming, would nevertheless be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0026] In addition, it should be noted that in order to avoid confusing the present invention with unnecessary details, only the device structure and / or processing steps closely related to the ...

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Abstract

The utility model provides a method and a system for connecting tables in a plurality of heterogeneous distributed databases. The method comprises the following steps: responding to received data inquiry commands that relate to data from at least two remote data sources, generating a subcommand for a first data source according to the data inquiry commands, retrieving matched data in the first data source in a mode of block fetch according to the subcommand, sending at least relative columns in retrieval block data to a second data source, inserting the relative columns into a temporary tablefor implementing joint operation with a table in the second data source, and receiving a connected result set from the second data source, wherein the relative columns relate to the columns relative to the joint operation. The employment of the method and the system can reduce the disc input / output (I / O) cost in remote data sources and the communication cost between federative database servers and remote data sources.

Description

technical field [0001] The present invention relates generally to database information management systems, and in particular to a method and system for joining tables in multiple heterogeneous distributed databases. Background technique [0002] In large modern enterprises, it will be unavoidable that different departments of an organization use different database management systems (DBMS) to store and retrieve their critical data. And only by combining information from these systems can the agency realize the full value of the data. [0003] In finance, for example, mergers and acquisitions are almost constant. The newly created institution will inherit the original institution's databases, many of which are relational but from different manufacturers. They may have one or more database management systems. Each database can have a different application for computing important information. After the merger, the new agency needs to be able to access all customer informati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
CPCG06F17/30498G06F16/2456
Inventor 李明李海峰孙云峰赵胜
Owner IBM CORP
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