validates
the database properties when you set the properties. An exception is returned
if you specify an invalid value when you set these properties.
After
you set the derby.database.sqlAuthorization property to TRUE,
you cannot set the property back to FALSE.
If a user
attempts to connect to a database but is not authorized to connect to that
database, the SQLException 04501 is returned.
If a user with read-only
access attempts to write to a database, the SQLException 08004 - connection
refused is returned.