Fusion query method and system applied to distributed multi-dimensional database

A joint query, multi-dimensional data technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of not being able to reflect the superiority well, and achieve the effect of reducing the amount of data and high computing efficiency

Inactive Publication Date: 2018-09-04
哈尔滨工创智能科技有限公司
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  • Abstract
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Problems solved by technology

However, this method is only suitable for single-computer operation, but with the advent of the era of big data, distributed computing has become the general trend, so when faced with a very large amount of data, this method only suitable for single-computer operation cannot well demonstrate its superiority

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  • Fusion query method and system applied to distributed multi-dimensional database
  • Fusion query method and system applied to distributed multi-dimensional database

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The invention provides a joint query method applied to distributed multi-dimensional databases, which can not only obtain the top K results by synthesizing multiple attributes, but also can be applied in a distributed parallel environment, and also has a high performance when dealing with large-scale databases. operating efficiency.

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Abstract

The invention relates to a fusion query method and system applied to a distributed multi-dimensional database. The method comprises the steps that original data of the multi-dimensional database is divided for servers; each server performs skyline query calculation in a mapping stage, skyline query points in the divided original data on each server are inquired, and the skyline query points serveas preliminary screening results of skyline query; the servers carry out top-k screening on the preliminary screening results in a protocol stage, data points of each multi-dimensional data space in the preliminary screening results and corresponding weighting functions are sequentially multiplied to obtain fractional values, and the fraction values are sequenced in the protocol stage to obtain first k values with the maximum or minimum fractional value to serve as query results. The method is applicable to a distributed parallel computing environment, also combines the skyline query method with the top-k query method, further reduces the data volume and is higher in computing efficiency.

Description

technical field [0001] The invention relates to distributed data computing technology, in particular to a method and system for joint query of multi-dimensional databases applied in distributed. Background technique [0002] With the advent of the era of big data, data began to show explosive growth. The ever-accumulating data poses severe challenges to data storage, analysis and other fields. But massive data does not necessarily mean rich information, in many cases it will lead to information overload. For users, how to quickly extract useful information from big data is one of the core issues of big data. In search engines, e-commerce, mobile apps and many other fields, Top-K query is an extremely common query type. In the multidimensional database query, users can reflect their own preferences by setting the weights of different attributes, and the system calculates the score (score) value of each sequence according to the weights submitted by the user, sorts accordin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 王宏志赵志强
Owner 哈尔滨工创智能科技有限公司
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