Distributed query method of spatial service data

A distributed query and spatial data technology, applied in the information field, can solve problems such as performance bottlenecks

Inactive Publication Date: 2013-04-24
CHINA NAT INST OF STANDARDIZATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the traditional design and implementation scheme, it can work smoothly when dealing with small-scale single data storage, but it will encounter performance bottlenecks in dealing with the continuously updated large-scale data storage and retrieval requirements

Method used

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  • Distributed query method of spatial service data
  • Distributed query method of spatial service data
  • Distributed query method of spatial service data

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Experimental program
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Embodiment Construction

[0021] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0022] figure 1 It is a schematic diagram of the query parsing process of the existing distributed query method, such as figure 1 As shown, in the spatial query processing object query parsing execution process, the object query statement passes through the query parser, type checker, query translator, logical and physical optimizer, spatial query optimizer, scheduler and XML converter in turn, and finally Generate parse-optimized spatial query plans. The parsing process that the execution process of the spatial query parser goes through sequentially is defined as follows.

[0023] 1) Parser (Parser): According to the query grammar, the parser checks the grammatical correctness of the query statement, and constructs an abstract syntax parsing tree according to the given query statement.

[0024] 2) Typ...

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Abstract

The invention discloses a distributed query method of spatial service data. The distributed query method of the spatial service data comprises querying and parsing a spatial querying and processing object to generate a parsed and optimized spatial query plan; submitting a spatial data query to a service data access and integrated-service end which supports spatial function development; performing interactive operation on query workflow and back-end data service resources which support spatial development and spatial-data storage and returning a query result to an access and integrated client which calls service to apply. The distributed query method of the spatial service data has the advantages of being capable of performing distributed query on the spatial service data based on service access and an access method of the spatial service data, performing integrated-query on geographically distributed data source through a data service request, combining a returned result data-set and guaranteeing the data-consistency of an access and integrated process in a data protocol.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a distributed query method for service-oriented spatial data. Background technique [0002] Spatial data for geographic information applications, from the initial observation acquisition to data processing, as well as the release of information retrieval services and the acquisition and use of final data, are all elements that need to be included in the establishment of a spatial data grid computing environment. [0003] In the traditional spatial data access and processing methods, there is no effective design and technical support for the storage and access of distributed heterogeneous data. In the traditional design and implementation scheme, it can work smoothly in the case of small-scale single data storage, but it will encounter performance bottlenecks in response to the continuously updated large-scale data storage and retrieval requirements. [0004] In the distri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 高昂
Owner CHINA NAT INST OF STANDARDIZATION
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