Processing overlapping continuous queries
US8055653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2007 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Dec 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/24542
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An edge-covering based greedy method for shared filter ordering includes receiving a plurality of queries, wherein each query is a conjunction of filters, and each filter is shared across multiple queries of the plurality of queries, evaluating a unit price of each filter, evaluating, sequentially, each filter in order of a lowest to a highest unit price, to determine a value for each filter, and changing an ordering of the filters according to the values. An edge-covering based harmonic method for shared filter ordering includes receiving a plurality of queries, wherein each query is a conjunction of filters, and each filter is shared across multiple queries of the plurality of queries, evaluating a weight of each filter, evaluating, randomly, each filter having a probability inversely proportionally to its weight, to determine a value, and changing an ordering of the filters according to the values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.