diff options
Diffstat (limited to 'composite')
| -rw-r--r-- | composite/README | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/composite/README b/composite/README index b73fa15..bf9e745 100644 --- a/composite/README +++ b/composite/README @@ -12,7 +12,7 @@ person.hxx person-odb.hxx person-odb.ixx -person-odb.cxx +person-odb.cxx person.sql The first three files contain the database support code and the last file contains the database schema for the person.hxx header. @@ -21,7 +21,7 @@ person.sql following command line: odb -d <database> --generate-schema --generate-query person.hxx - + Where <database> stands for the database system we are using, for example, 'mysql'. @@ -34,16 +34,18 @@ 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 persists a 'person' object, loads it and updates its nickname and aliases which reside in a composite value type, then re-loads the object and prints its name to verify that the changes have been made persistent. Finally, the driver performs a database query which uses a - data member from the composite value type in its criterion. + data member from the composite value type 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 < person.sql |