New example, inheritance/polymorphism

Also move the inheritance example to inheritance/reuse.

1 files changed, 0 insertions, 55 deletions

diff --git a/inheritance/README b/inheritance/README
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-This example shows how to use persistent class inheritance.
-
-The example consists of the following files:
-
-employee.hxx
-  Header file defining the 'person' and 'employee' abstract persistent
-  classes as well as the 'permanent_employee', 'temporary_employee', and
-  'contractor' concrete persistent classes.
-
-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> --generate-schema --generate-query employee.hxx
-
-  Where <database> stands for the database system we are using, for example,
-  'mysql'.
-
-database.hxx
-  Contains the create_database() function which instantiates the concrete
-  database class corresponding to the database system we are using.
-
-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 persists a number of permanent and temporary employee
-  objects as well as a number of contractor objects. The next transaction
-  looks up a contractor based on the email address. Finally, the driver
-  performs a database query which uses a data member from the base class
-  in its criterion.
-
-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