ORM 'Navigation' is your friend

Don't be tempted to hand-write queries that are equivalent to navigations between entities:

			BatchControlId batchControlId = ...
			Query<BatchControlParameter> query = createQuery("from BatchControlParameter parm where parm.id.batchControlId = :parentId");
			query.bindId("parentId", batchControlId);
			List<BatchControlParameter> list = query.list();
		

DO: Use this instead - it'll use the cache and will almost certainly be faster:

			BatchControl batchControl = id.getEntity(); 
			if (batchControl == null) { /* oh oh */ }
			BatchControlParameters list = batchControl.getParameters();