Starting and deleting a messaging engine affects
the life cycle of its data store.
Appropriate actions must be carried out on the data store.
When starting, a messaging engine performs
checks on the tables that comprise the data store to
determine whether they are suitable. If the tables do not exist, and the user
has selected the Create tables option when configuring
the messaging engine, the messaging engine attempts
to create the tables. Otherwise, your database administrator must create the
tables beforehand, using the DDL statements generated by the sibDDLGenerator command.
Remember: When you remove a messaging engine, WebSphere Application Server does not delete
the data store tables automatically.
If you want to recreate the same messaging engine,
you must first delete the previous set of tables. But if you create a messaging engine with existing tables,
they must be empty, so that the messaging engine can
function correctly. Refer to the documentation for your chosen relational
database management system (RDBMS) for information about how
to delete tables. However, if you have created a data store with
default settings, you do not need to delete previous tables.