Schema mapping to a legacy table with primary and foreign key su

Details Schema mapping to a legacy table with primary and foreign key su Schema mapping to a legacy table with primary and foreign key su

1997-11-26

1999-09-21

Ho, Ruay Lian

Data processing: database and file management or data structures

Database design

Data structure types

707100, 395705, G06F 1730

Patent

active

059567252

ABSTRACT:
A method and system for mapping an object and an associated handle between the object-oriented schema of an application program and the relational schema of a database in which the object is persisted. The handle is reconstructed in response to a run-time request by an application program to instantiate the object. The handle may be an independent handle or an embedded handle. The relationships afforded by primary keys and foreign keys in a legacy, i.e., existing, relational database, can be preserved by mapping them to the independent and embedded handles, respectively. The mapping is performed prior to application program run-time, and is defined in a high-level schema mapping language, which may be generated with the aid of a schema mapping software tool.

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