Method, system, and program for optimizing the processing of queries involving set operators
US6792420B2 · kind B2 · utility
48Cited by
4References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Feb 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99933
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is a method, system, and program for processing a query including a query operation on a table derived from a set operation on two result tables. The query operation is performed on each result table separately to produce two intermediate result tables. The set operator is then applied to the two intermediate result tables to produce a final result table that is a same result table that would have been produced by performing the query operation on the table derived from the set operation performed on the two result tables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.