Extended SQL change definition language for a computer database system
US6115704A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1994 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | May 9, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99933
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A change definition language (CDL) serves as an extension of (and in the general format of) the structured query language known as SQL. The change definition language allows all important alterations to be described, as changes to an existing definition, for example, and may be used by all phases of the development cycle. The CDL statements do not make the changes directly in the catalog, but instead work through SQL and another intermediate mechanism such as DB2 ALTER tailored to make changes using SQL. The changes expressed in CDL may be migrated to downstream phases and fed back to earlier phases by use of a batch of change statements expressed in CDL.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.