Method and apparatus for performing a join query in a database system
US5987453A · kind A · utility
68Cited by
7References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Apr 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99935
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer implemented method for generating a response to a join. Two tables are divided into fragments. A join fragment map identifies, for each respective fragment from the first table, the fragments from the second table which contain a record that satisfies the join predicate with a record from the respective fragment from the first table. The map is used to eliminate fragments which cannot satisfy the join predicate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.