Caching optimization with disk and/or memory cache management
US6327587A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Oct 5, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99932
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Preferred embodiments of the invention provide a system for, and method of, exploring relationships in data stored in a computer readable medium. Under one preferred set of embodiments, sets of data are maintained in a computer readable medium and include at least one intensional expression and one extensional expression of at least one set resulting from an evaluation of a first query. A second query is transformed into a set program. It is then determined whether a sub-expression of the set program is satisfied by a maintained set. If so, the sub-expression is removed from the set program and the maintained set that satisfies the sub-expression of the set program is used. Under another preferred set of embodiments, a query is received having at least one operator chosen from a set of operators that includes relational operators and having at least one input and output associated with the operator and defined as a table having at least one domain having a type associated therewith. The query is transformed into a set program having at least one operation structure, corresponding to the operator. An execution context is then analyzed to automatically select an operation structure f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.