User specification of query access paths in a relational database management system
US5940819A · kind A · utility
62Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Aug 29, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99942
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A relational data base management system includes a query processor that permits consideration of alternative user-specified access paths, which the processor will validate and incorporate into the query execution plan it otherwise generates. The optimizer of the query processor retrieves user-specified data that defines an access path for a query during bind operations. Any access path parameters that are invalid are replaced with processor-selected values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.