Method and mechanism for handling arbitrarily-sized XML in SQL operator tree
US7873645B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2003 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Oct 7, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/86
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method and mechanism for processing expressions and operator trees. An approach is particularly useful to optimize processing of XML statements with respect to SQL operators. A top-down processing approach can be taken to directly output data from operators to a data stream. In addition, multiple processing approaches can be taken within a single expression tree, with some operators processed using the top-down approach and other operators processed with the bottom-up approach. Even data that can not be streamed is copied fewer times using this approach, intermediate values from bottom-up processing may still be streamed if it is used by an operator that is eligible for top-down processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.