Mechanism for deferred rewrite of multiple XPath evaluations over binary XML
US8073843B2 · kind B2 · utility
6Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2008 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Sep 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/8365
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mechanism is provided for improving the performance of particular database queries operating on a view comprising binary-encoded XML. A determination is made about whether a XML index is available to improve the computation of XPath data before deriving an optimized execution plan for a particular query. When a XML index is not available to help expedite the computation of binary-encoded XML, then deferring the computation of the XPath data until after the view merge stage avoids unnecessary computation of XPaths that are part of the view but not needed for the particular query.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.