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A query method and device for spatio-temporal data
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A technology of spatio-temporal data and query methods, applied in the computer field, can solve the problems of spatio-temporal change expression and spatio-temporal query processing barriers, spatio-temporal data model realization and practical application barriers, and achieve the effect of increasing spatio-temporal elements
Active Publication Date: 2016-12-07
SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY +1
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[0008] The defect of method 1: the spatiotemporal query method is based on the relational model, which is actually pure SQL, but it has great obstacles in the expression of spatiotemporal changes and spatiotemporal query processing
Defects of the second method: For some inherent problems in the object-oriented database, there are certain obstacles in the realization and practical application of the object-oriented spatio-temporal data model
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Embodiment 1
[0055] Embodiment 1 of the present invention provides a query method for spatio-temporal data, such as figure 1 As shown, the method flow includes:
[0056] Step 101: Obtain the sentence information input by the user, and when the sentence information is identified with a spatiotemporal keyword identifier, judge the type of the sentence information according to the type identification keyword following the spatiotemporal keyword identifier.
[0057] Before the step 101, it also includes:
[0058] Optionally, the method further includes: predefining spatio-temporal keywords, spatial information keywords and temporal information keywords;
[0059] Wherein, the spatio-temporal keyword is specifically ST, which is used directly before the sentence information, indicating that the sentence information has added spatio-temporal information, for example,
[0060] ST Create P...
[0061] ST Select*from……
[0062] When executing the algorithm, when the space-time keyword ST is incl...
Embodiment 2
[0115] Embodiment 2 of the present invention provides a space-time data query device, such as image 3 As shown, the device includes:
[0116] Obtaining and judging module 301, used to acquire the sentence information input by the user, when the time-space keyword identifier is identified in the sentence information, judge the type of the sentence information according to the type identification keyword behind the time-space keyword identifier;
[0117] An extraction module 302, configured to extract spatial information keywords and temporal information keywords from the sentence information when the type of the sentence information is a query category;
[0118] The query processing module 303 is configured to obtain the spatial information corresponding to the spatial information keyword, search for data matching the spatial information from the database, and obtain a first data set, and obtain the temporal information corresponding to the temporal information keyword. The t...
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Abstract
The invention discloses a spatio-temporal data query method and device. the method comprises the steps of obtaining statement information input by a user; when a spatio-temporal keyword identification is identified in the statement information, judging the type of the statement information according to a type identification keyword; when the type of the statement information is a query type, extracting a spatial information keyword and a tense information keyword from the statement information; carrying out query processing according to the spatial information keyword and the tense information keyword. The device comprises an obtainment judgment module, an extraction module and a query processing module. According to the spatio-temporal data query method and device, expansion is carried out on the basis of the traditional SQL (Structured Query Language); the spatio-temporal elements are added; in a non-relational data structure, a new keyword and a new query mode are proposed, and the recording operation is completed.
Description
technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for querying spatio-temporal data. Background technique [0002] Since the early 1990s, based on the research results of spatial database and temporal database, some scholars have proposed the concept of spatio-temporal database, seeking to describe and process the movement behavior of objects in nature by combining space-time. quickly became a research hotspot. From the application point of view, compared with traditional relational databases, spatio-temporal databases are more suitable for dealing with multi-dimensional and complex spatio-temporal data and behaviors, and can query objects located in a specific spatial area within a specific time period. From the perspective of technical implementation, in order to process spatiotemporal queries, spatiotemporal databases need to study unique spatiotemporal data types and processing mechanisms for represent...
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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 湛邵斌霍红颖唐飞
Owner SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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