Generalized key indexes
US5870747A · kind A · utility
56Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1996 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jul 9, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99942
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Generalized key indexes enable a first table of a relational database to be indexed using an index key and index conditions, wherein either or both of the index key and index conditions may reference multiple tables of the database or may be an expression using fields of one or more tables other than the first table. The generalized key indexes directly associate generalized index key values with record identifiers of records of the first table, thus enabling efficient storage and data retrieval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.