You can use data access applications to manipulate data from outside sources for use within your application serving environment.
The error detection model has been expanded and the data source has a configuration option that you can use to select the exception mapping model or the exception checking model for error detection. This configuration option allows the Error Detection Model to comply with Java Database Connectivity (JDBC) 4.0.
All enterprise bean container-managed persistence (CMP) beans under the EJB 2.x specification receive a standard EJB exception when an operation fails. JDBC applications receive a standard SQL exception if any JDBC operation fails. The product provides special exceptions for its relational resource adapter (RRA), to indicate that the connection currently held is no longer valid.