<p>Singleton Services uses certain SQL commands to talk to the
database. By default, the commands are obtained from a
WebLogic-supplied implementation of
weblogic.cluster.singleton.QueryHelper. If the database is not
suported, or the SQL needs to be more optimized or altered for a
particular use case, one can change the class used by setting
this variable. The classname provided will be loaded at boot
time, and used to execute the various SQL queries.</p>
(Interface=weblogic.management.configuration.ClusterMBean Attribute=getSingletonSQLQueryHelper)