Prime number marking-based cyclic graph branchlet existence query method
A query method and technology of directed acyclic graph, which is applied in the field of querying the existence of twigs in cyclic graphs based on prime number marks, can solve the problems of not supporting cyclic graph query, low query efficiency, and not supporting twig query, etc., and achieve reduction Space overhead, reduce time overhead, and broaden the effect of application range
Inactive Publication Date: 2017-02-15
SHANDONG DATA CLOUD TECH CO LTD
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However, XSketch only supports branchless path queries
[0008] Therefore, the existing query methods do not support circular graph query or twig query, and the query efficiency is very low
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[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0032] like figure 1 As shown, the circled graph G in the embodiment of the present invention is given, and the nodes contained in the circled graph G are respectively v1, v2, v3, v4, v5, v6, and v7, and their categories are respectively a, b, and e , b, d, c, b. like figure 2 As shown, the twig T to be queried in the embodiment of the present invention is given. The nodes contained in the twig T are respectively u1, u2, .u3, and u4, and their categories are respectively a, b, c, and d.
[0033] like image 3 As shown, the directed acyclic graph G′ transformed from the cyclic graph G is given, figure 1 The three nodes v1, v2, and v3 in the cyclic graph G are a strongly connected component of G, and are merged into a node v1' of the directed acyclic graph G'. The category of the v1' node is the union a, b, e of the three node categories of v1, v2, ...
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The invention discloses a prime number marking-based cyclic graph branchlet existence query method. The method is implemented by the following steps of a), marking a cyclic graph and a branchlet; b), converting the cyclic graph into an acyclic graph; c), performing prime number marking; d), searching for matching nodes according to type information; and e), performing screening according to the requirements of the edges in the branchlet T. According to the cyclic graph branchlet existence query method, the cyclic graph is converted into the acyclic graph first and then the nodes in the directed acyclic graph are subjected to the prime number marking; and in the branchlet query process, the nodes meeting the requirements are queried according to the types of the nodes in the branchlet nodes first, and then the screening is further performed according to the requirements of the single-hop edge and the multi-hop edge in the branchlet, child nodes and a parent node on the node types to judge whether the branchlet needed to be searched for exists in the cyclic graph or not, so that the problem that an existing query method does not support cyclic graph query or branchlet query is solved.
Description
technical field [0001] The present invention relates to a method for querying the existence of twigs in a cyclic graph based on prime number marks, more specifically, it relates to a method for converting a cyclic graph into a directed acyclic graph and then according to the requirements of node types and edges in the twigs. Lookup method for existence query of twigs in cyclic graphs based on prime markers. Background technique [0002] Graph theory takes graphs as the research object. A graph is an image composed of a number of given points and a line connecting two points. It is a commonly used mathematical theory and tool for solving complex engineering problems. In graph theory, points are used to represent things, and lines connecting two points are used to represent the relationship between the corresponding two things. [0003] The method based on interval marking is a wider method used in tree structure diagrams. The idea is to mark an interval [s,e] for each node ...
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IPC IPC(8): G06F17/30
CPCG06F16/903
Inventor 吕雪岭彭云
Owner SHANDONG DATA CLOUD TECH CO LTD