Rewriting inequality queries
US9946749B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2016 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Sep 8, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/248
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for expressing inequality expressions as a bounded number of equality expressions. One of the methods includes receiving an original query having an inequality expression for an original attribute. A new query that replaces the inequality expression with a bounded number of equality expressions is generated, wherein each equality expression references a respective auxiliary attribute, each auxiliary attribute representing intervals of values for the original attribute. The new query having the bounded number of equality expressions is provided to a database system instead of the original query. Query results that satisfy the inequality expression for the original attribute are received from the database system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.