This example shows how to use ODB with C++11. In particular, this example examines ODB support for the new std::unique_ptr and std::shared_ptr smart pointers and their lazy variants as well as the unordered containers. It also shows how to use new C++11 features such as the range-based for-loop when working with persistent objects and handling query results. The example consists of the following files: employee.hxx Header file defining the 'employee', 'employer', and 'pension_fund' persistent classes. We use the standard std::shared_ptr/weak_ptr smart pointers as well as their lazy versions provided by ODB to establish a bidirectional employee-employer relationship. We also enable session support for these two classes using the 'db session' pragma. Because we don't share the 'pension_fund' objects, we use std::unique_ptr as an object pointer for this persistent class. We also use the std::unordered_set container to keep track of the employee's email addresses. employee-odb.hxx employee-odb.ixx employee-odb.cxx employee.sql The first three files contain the database support code and the last file contains the database schema for the employee.hxx header. These files are generated by the ODB compiler from employee.hxx using the following command line: odb -d <database> --std c++11 --generate-schema --generate-query employee.hxx Where <database> stands for the database system we are using, for example, 'mysql'. The --std c++11 option is used to instruct the ODB compiler to compile in the C++11 mode. database.hxx Contains the create_database() function which instantiates the concrete database class corresponding to the database system we are using. Unlike other examples, here we use std::unique_ptr instead of std::auto_ptr to return the created database. driver.cxx Driver for the example. It includes the employee.hxx and employee-odb.hxx headers to gain access to the persistent classes and their database support code. It also includes database.hxx for the create_database() function declaration. In main() the driver first calls create_database() to obtain the database instance. It then creates a number of 'employee', 'employer', and 'pension_fund' objects and persists them in the database. Then the driver loads and prints some information about various objects and their relationships. Finally, the driver performs a database query and iterates over the result printing basic information about the returned objects. To compile and link the example manually from the command line we can use the following commands (using MySQL as an example; replace 'c++ -std=c++11' with your C++ compiler in C++11 mode): c++ -std=c++11 -c employee-odb.cxx c++ -std=c++11 -DDATABASE_MYSQL -c driver.cxx c++ -std=c++11 -o driver driver.o employee-odb.o -lodb-mysql -lodb To run the example we may first need to create the database schema (for some database systems, such as SQLite, the schema is embedded into the generated code which makes this step unnecessary). Using MySQL as an example, this can be achieved with the following command: mysql --user=odb_test --database=odb_test < employee.sql Here we use 'odb_test' as the database login and also 'odb_test' as the database name. Once the database schema is ready, we can run the example (using MySQL as the database): ./driver --user odb_test --database odb_test