Relational Persistence 
The relational persistence framework of the SAP J2EE Engine is called Open SQL for Java. It is a part of a comprehensive infrastructure that is designed to provide persistency for application development inside the SAP J2EE Engine. Among the key features of the framework are:
· Database independence
· Efficiency
· Maintainability
· Orientation to standards
· Close integration into the SAP J2EE Engine
· Enhanced performance by table buffers and statement pooling
The Open SQL for Java offers a set of programming models:
· Open SQL/JDBC – this enables support for the JDBC standard used for dynamic queries to the database
· Open SQL/SQLJ – this model is based on the ISO-standardized SQLJ and provides support for static SQL embedded in the Java code.
For a quick guide to working with the Open SQL for Java framework, see the Getting Started with Relational Persistence.
See also: