drop database if exists rename_db;
drop database if exists rename_to;
create database rename_db;
create database rename_to;
use rename_db;
create table t1(c1 int primary key,c2 int);
create table t2(c1 int primary key,c2 varchar(30));
rename table t1 to test,t2 to test2;
#rename table rename_db.t1 to rename_to.test;

rename table t1 to test,t2 to t1,test to t2;