Database system and database management method
US9703829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2011 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Apr 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2246
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A database system comprises an interface for a storage device, and a control device for accessing the storage device through the interface. The storage device stores a table that manages a plurality of rows comprising a plurality of item values, and an index configured in a tree structure based on a plurality of nodes enabling to identify the rows by using one or more item values. The control device identifies an item value condition included in a search condition of a search query, determines whether or not the node of the index corresponding to the item value condition is reference-disabled, and when the node is reference-disabled, identifies a range of item values managed by the reference-disabled node, and searches for a row that satisfies the search condition for the identified range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.