By designating CMP sequence groups for entity beans, you can prevent
certain types of database-related exceptions from occurring during the run
time of your EJB application. Within each group you specify the order in which
the beans update your relational database tables.
About this task
Both types of sequence groups must be created after you have assembled
the beans into an EJB module, prior to installing your application on the
product. If you need to edit sequence groups, you must uninstall the application,
make your changes using the following steps as a guide, and then reinstall
your application.
Note: If you already selected or plan to use top-down mapping
for mapping your enterprise beans to back end data, you do not
need to create a sequence group with an RI_INSERT type. The product does not
generate an RI policy for the database schema that it creates when you select
top-down mapping.