How Do I Delete a Business Entity Instance?
There are a number of ways to delete entities.
1. Delete an instance that you have a reference to:

person.delete();
2. Delete an instance where you have only its Id:

delete(personId);
3. Delete the results of a query

Query query = createQuery("from Person person where exists ( "
    + " from PersonName as perName where person = perName.id.person and "
    + "perName.isPrimaryName = :systemBool and perName.entityName "
    + "like :name)");
 query.bindLikableString("name", "ABC", 64);
 query.bindBoolean("systemBool", com.splwg.base.api.datatypes.Bool.TRUE);

 long rowsDeleted = query.delete();