Method and computer program for evaluating database queries involving relational and hierarchical data
US8880505B2 · kind B2 · utility
3Cited by
2References
18Claims
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Key dates
| Filing date | Jun 18, 2013 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Jun 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2471
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for resolving conjunctive queries, comprising relational predicates and external predicates, such as XML predicates. The method and apparatus obtain results from a relational engine or from an external engine, and then use the obtained results as input for the other engine, so as to optimize the activity of the other engine. The process may repeat further times, with the results obtained by the other engine being input to the first engine. The method and apparatus further disclose handling value, being isomorphic hierarchical subtrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.