Efficiently performing inequality joins
US7644083B1 · kind B1 · utility
19Cited by
7References
13Claims
0Family size
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Key dates
| Filing date | Sep 30, 2004 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Jun 13, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2456
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A database system is able to receive a query that specifies an inequality join involving at least a first relation and a second relation. A plurality of segments of the first relation are sorted in the cache. Each sorted segment of the first relation in the cache is compared with the second relation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.