private void updateGroup() {		String sql = "update um_group set pid=:pid where group_id=:id";		CompiledSQL cs = tm.getCompiledSQLBuilder().buildCompiledSQL(				User.class, sql);		cs.addParamType("pid", "int");		cs.addParamType("id", "int");		WriteTranSession session = tm.openRWTran(false);		try {			SQLBatcher batcher = session.createCompiledSQLBatcher(cs);			batcher.setBatchSize(80);			for (int i = 0; i < groups.size(); i++) {				Map g = groups.get(i);				HashMap params = new HashMap();				params.put("pid", Util.o2l(g.get("pid")));				params.put("id", Util.o2l(g.get("id")));				batcher.addNewBatchParams(params);			}			batcher.executeBatch();			session.commit();		} finally {			session.close();		}	}