Object identity and partitioning for user defined extents
US6341289B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1999 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | May 6, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99945
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The preferred embodiment of the present invention provides a system and method is provided that allows transparent and flexible partitioning of created objects in the context of schema mapping. The preferred schema mapper uses partition key values to facilitate partitioning of the created objects. The partition key value for an object determines what partition that object belongs in. To facilitate the most flexible schema mapping and partitioning, the partition key value for an object can be defined by the developer to be an attribute of an owning object, a primary key field of an owning object, or constant defined for its class. When new owned objects are created the partition key values are retrieved from their specified location in the owning object to determine the partition in which the new owned object belongs. In the preferred embodiment the developer also specifies a corresponding column of fields in the owned objects table to store the partitioning key values. Preferably, the partitioning key values are stored as a subset of the primary key field for the owned object. Because the primary key field is used to uniquely identify the corresponding object, the partition informa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.