一个内存数据库的源代码这是服务器端还有客户端

				#provided by roberto				function user.f1();				  # create bat				  xxx := bat.new(:void, :dbl);				  bat.setName(xxx,"xxx");				  bat.setPersistent(xxx,true);				  transaction.commit();				  				  # check existance				  xxx_1 := bbp.getNames();				  xxx_2 := bat.reverse(xxx_1);				  xxx_3 := algebra.exist(xxx_2,"xxx");				  				  # if it exists, print it				  barrier ifb := xxx_3;				    a := bbp.bind("xxx");				    io.print(a);				  exit ifb;				  				  # remove it				  b := bbp.bind("xxx");        ## here, it becomes b := a;				  bat.setPersistent(b,false);  ## but a might be not defined				  transaction.commit();				end f1;				optimizer.commonTerms("user", "f1");