Subinterface of java.sql.Connection to be implemented by Connection proxies. Allows access to the un
derlying target Connection.
This interface can be checked when there is a need to cast to a native JDBC Connection such as Oracle's OracleConnection. Alternatively, all such connections also support JDBC 4.0's Connection#unwrap. @author Juergen Hoeller @since 1.1 @see TransactionAwareDataSourceProxy @see LazyConnectionDataSourceProxy @see DataSourceUtils#getTargetConnection(java.sql.Connection)