Query method for a distributed database system and query apparatus
US9317555B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2013 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Apr 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, system, and/or computer program product queries a distributed database system. In one embodiment, the query method comprises: parsing a query request; generating an access plan for the query request, wherein the access plan specifies therein a database table related to the query request, and the database table has a plurality of copies stored in different database devices respectively; selecting, based on status information of each of the plurality of copies of the specified database table, one copy from the plurality of copies as a target database table; and executing a query operation in the target database table according to the access plan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.