diff options
| author | Boris Kolpackov <boris@codesynthesis.com> | 2011-04-26 09:17:15 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2011-04-26 09:17:15 +0200 |
| commit | 6ae5df8a85cd0344cc12effe788f7e09d06df372 (patch) | |
| tree | fef101ef0ab4c83dff84370e12640f900101e806 /inverse | |
| parent | e159da71e25aa50fc73479f9aa7aef7185c28a1c (diff) | |
Add note on embedded schemas
Diffstat (limited to 'inverse')
| -rw-r--r-- | inverse/README | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/inverse/README b/inverse/README index a1c1a64..94b01a6 100644 --- a/inverse/README +++ b/inverse/README @@ -4,7 +4,7 @@ shows how to work with lazy pointers. All the relationships presented in this example declare one side as inverse in order to produce canonical database schema. -The example uses the shared_ptr and weak_ptr smart pointers from TR1 and +The example uses the shared_ptr and weak_ptr smart pointers from TR1 and requires a C++ compiler with TR1 support or an external TR1 implementation, such as the one provided by Boost. @@ -12,13 +12,13 @@ The example consists of the following files: employee.hxx Header file defining the 'employee', 'employer', 'position', and 'project' - persistent classes as well as the employer-employee (one-to-many), + persistent classes as well as the employer-employee (one-to-many), employee-position (one-to-one), and employee-project (many-to-many) bidirectional relationships between them. employee-odb.hxx employee-odb.ixx -employee-odb.cxx +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. @@ -44,7 +44,7 @@ driver.cxx 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', 'position', and 'project' objects, sets the relationships between them, and persists @@ -53,8 +53,10 @@ driver.cxx the driver performs a database query which uses a data member from a related object in its criterion. -To run the example we first need to create the database schema. Using MySQL -as an example, this can be achieved with the following command: +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 |