Query processing in a parallel single cursor model on multi-instance configurations, using hints
US7475056B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2005 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Apr 30, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99936
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A database statement is processed in a multi-server system, in a manner to increase the possibility that slave server processes on remote nodes will generate execution plans that are equivalent to the corresponding execution plan generated by the query coordinator process. A set of hints is generated based on the same information on which the master plan is based. The set of hints is sent to remote nodes, where respective remote plans are generated based in part on the set of hints. Use of the hints in generation of the remote plan increases the possibility that the remote plan will be equivalent to the master plan and that the slaves on the other database server will be able to join in parallel processing of the database statement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.