O-R mapping

(redirected from Object-relational mapping)
Also found in: Wikipedia.

O-R mapping

(Object-Relational Mapping) Converting data from tables in a relational database to objects and vice versa. Many applications employ object-oriented programming, but keep the data in traditional relational tables. The O-R mapping function can be accomplished with statements in the object-oriented programming language or via a third-party O-R mapping program.

For Complex Relationships
When an object model is very complex with a large number of many-to-many relationships, it takes time to store the data in relational tables. This "impedance mismatch" is resolved with the use of an object database, which is designed for complex object data. See object database and object-oriented programming.


Object Relational Mapping
There are three common types of O-R mapping from tables to objects and back again. A third-party O-R mapping program eliminates much of the tedium of writing this conversion code. (Illustration courtesy of the Real Time Division of Progress Software, www.progress.com/realtime)
References in periodicals archive ?
It provides a framework that allows users to perform object-relational mapping of database objects to Delphi classes with full support for encapsulation, inheritance, polymorphism and other OOP features.
NET framework, this guide to Entity Framework 4 provides practical instruction based around real world examples to illustrate the convenience and powerful capabilities of this data object-relational mapping tool.
They first provide a guide to the issues and trade-offs involved in choosing a Java persistence mechanism for relational data stores in chapters that provide a brief history of relevant persistence mechanisms, business drivers and associated information technology requirements, implementation issues associated with object-relational mapping, and a means of assessing the choice of mechanism.
Another new component, called Jalapeno, eliminates object-relational mapping for Java programmers, reducing their development cycles by at least 40 percent.
By releasing the reference implementation and bringing its expertise in object-relational mapping and persistence to the Java and open source communities, Oracle continues to demonstrate its commitment to making it easier for developers to create and deploy enterprise applications.
NET Framework Delivers Fast and Feature-Rich Object-Relational Mapping
According to Fremont, California-based Versant, the purchase of JDO Genie will provide a fast object-relational mapping product, as well as a set of design-time tools that will make it easy for developers to use its product.
Some object-relational mapping tools provide a runtime caching component to help counteract the performance penalty introduced by translating data between objects and relational forms.
Building on the GigaSpaces XAP platform, it provides cloud transactions to SQL and NoSQL data stores, as well as automating distributed programming and object-relational mapping.
EntityDAC provides a powerful framework that allows to perform object-relational mapping of database objects to Delphi classes with full support for encapsulation, inheritance, polymorphism and other OOP features.
Although the vehicle for this message is C# 2008 and the two new object-relational mapping (ORM) tools from Microsoft (LINQ to SQL and the ADO.
The Eclipse JSR220-ORM Project will produce standards-based, object-relational mapping design-time tooling in Eclipse.
Full browser ?