Incremental maintenance of summary tables with complex grouping expressions
US6763352B2 · kind B2 · utility
43Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1999 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Dec 2, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99952
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus, and article of manufacture for the incremental maintenance of summary tables with complex grouping expressions where the change (insert/delete/update) of a single row of the base data can affect multiple rows in the summary table. The invention applies the complex grouping expression to the raw delta, yielding a delta stream consisting of multiple (but distinct) grouping combinations. The invention then inserts/deletes/updates delta values into/from the existing summary table so that each grouping combination of the delta stream modifies its corresponding grouping combination in the summary table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.