TREE-STRUCTURED DATA PROCESSING SYSTEM, TREE-STRUCTURED DATA PROCESSING METHOD, TREE-STRUCTURED DATA PROCESSING DEVICE, AND TREE-STRUCTURED DATA PROCESSING PROGRAM

摘要

[Problem] To reduce a service response unavailability time due to an update lock while reconstructing a tree structure in a relational database, and hold the data retrieval/reading performance without deterioration. [Solution] A tree-structured data processing device 10 of a tree-structured data processing system 100 comprises: a processing thread setting unit which launches and executes a request processing thread for performing a search process by referring to a nested set data table, and launches and executes a request processing thread 150 for updating data in a naive tree data table; and a synchronization state management unit which switches the state of each request processing thread 150 to synchronization waiting, when receiving synchronization waiting instruction information indicating the 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 which converts the data in the naive tree data table updated by the update request into the data in the nested set data table and synchronizes the data.