Database management system with efficient version control
US7243088B2 · kind B2 · utility
20Cited by
36References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2003 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Aug 8, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99931
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A two copy versioning scheme is proposed. The scheme provides efficient implementation for a high read load database and eliminates read dependencies. The versioning scheme provides efficient implementation for transactions executing under ANSI READ COMMITTED isolation, and is extensible to serializable isolation. The two-copy versioning scheme is garbage free meaning that all versions of data records are used during execution and is adapted to index scanning operations. A “deferred delete” scheme allows read transactions to complete data deallocation operations. Statements that require “snapshots” are efficiently supported.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.