The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2023
Filed:
Apr. 03, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Tetsuro Nakamura, Musashino, JP;
Naoki Takada, Musashino, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
[Problem] In reconfiguration of a tree structure in a relational database, to reduce a service response-disabled time by an update lock, and to maintain data retrieving and reading performance without deterioration. [Solution] A tree structure data processing deviceof a tree structure data processing systemincludes a process thread setting unit and a synchronization state management unit. The process thread setting unit starts and performs a request process thread for retrieval processing with reference to a nested set data table and starts and performs a request process threadfor updating data of a naive tree data table. The synchronization state management unit switches a state of the request process threadto a synchronization waiting state when receiving synchronization waiting instruction information indicating start of a synchronization process between the naive tree data table and the nested set data table. A synchronization device includes a synchronization processing unit that converts data of the naive tree data table updated in response to an update request into data of the nested set data table to perform synchronization.