Method and apparatus for evaluating index predicates on complex data types using virtual indexed streams
US6678686B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1999 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Dec 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2455
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus, article of manufacture, and a memory structure for providing access to abstract data types using an index providing a tuple. The method comprises the steps of accepting a database query; generating an index predicate from the database query; and determining a tuple from an index using the index predicate. The tuple is associated with an abstract or complex data type responsive to the database query. A data stream is initialized with the index predicate; and the tuple is returned in the data stream. The apparatus comprises means for performing the above method steps, and the article of manufacture comprises a medium tangibly embodying computer instructions for performing these method steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.