Symbolic query exploration
US8180786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2009 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Jul 2, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/33
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A symbolic query exploration (QEX) module automatically produces output information that can be used to evaluate a database. The QEX module operates by converting an input query into a formula for processing by a satisfiability module theories (SMT) solver module. The SMT solver module generates a model that satisfies the formula. The model yields table information that is used to populate the database and, optionally, parameter information that is used to instantiate the query. A query evaluation module then submits the instantiated query to the populated database and evaluates whether an evaluation result produced thereby agrees with pre-specified condition information. The QEX module can preprocess the formula using either (or both) an eager expansion approach (in which the formula is expanded in an upfront manner) or a lazy expansion approach (in which axioms are identified for later possible expansion by the SMT solver module).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.