Boolean term conversion for null-tolerant disjunctive predicates
US9519662B2 · kind B2 · utility
1Cited by
21References
15Claims
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Key dates
| Filing date | Sep 10, 2013 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | May 7, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/24534
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
System, method, and computer program product to modify a received query, the received query including a first predicate specifying a comparison operator and a second predicate specifying an IS NULL operator, by replacing the comparison operator of the first predicate with an extended comparison operator, and removing the IS NULL operator from the received query, the extended comparison operator configured to support searching of NULL values in a database management system (DBMS), wherein the extended comparison operator is configured to return rows having column data matching a value predefined to represent NULL values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.