Automatic generation of join graphs for relational database queries
US6996567B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 2001 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jul 5, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99934
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is described for automatic generation of join graphs for relational database queries. The method includes marking instances of tables in a hierarchical representation of a database schema according to a selection procedure that processes tables in an input list having single occurrences in the hierarchical representation, multi-dimensional tables in the input list having multiple occurrences in the hierarchical representation, one-dimensional tables in the input list having multiple occurrences in the hierarchical representation that reference the multi-dimensional tables and have one of the multi-dimensional tables as a parent in the hierarchical representation, and any remaining one-dimensional tables in the input list having multiple occurrences in the hierarchical representation. The hierarchical representation is configured using expert knowledge of the database usage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.