drop database if exists jx_db;
create database jx_db;
use jx_db;
drop table if exists t1, t2,t3;
create table t1 (c1 int primary key, c2 int);
set  autocommit=0;
insert into t1 values(1,1);
create table t2 (c1 int primary key, c2 int);
rollback;
select * from t1;
c1	c2
1	1
desc t2;
Field	Type	Null	Key	Default	Extra
c1	int(11)	NO	PRI	NULL	
c2	int(11)	YES		NULL	
set  autocommit=1;
begin;
insert into t1 values(2,2);
create table t3 (c1 int primary key, c2 int);
rollback;
select * from t1;
c1	c2
1	1
2	2
desc t3;
Field	Type	Null	Key	Default	Extra
c1	int(11)	NO	PRI	NULL	
c2	int(11)	YES		NULL	
create table ddl_t(c int);
set autocommit = off;
insert into ddl_t values(3);
alter table ddl_t add column c2 int;
select * from ddl_t;
c	c2
3	NULL
rollback;
select * from ddl_t;
c	c2
3	NULL
create table jx_t1(c int);
set autocommit = off;
insert into jx_t1 values(4);
create table jx_t1(c int);
ERROR 42S01: Table 'jx_t1' already exists
select * from jx_t1;
c
4
rollback;
select * from jx_t1;
c
4
create table jx_t2(c int);
set autocommit = off;
insert into jx_t2 values(5);
create user if not exists jx_user;
select * from jx_t2;
c
5
rollback;
select * from jx_t2;
c
5
create table jx_t3(c int);
set autocommit = off;
insert into jx_t3 values(6);
create user jx_user;
ERROR HY000: Operation CREATE USER failed for 'jx_user'@'%'
select * from jx_t3;
c
6
rollback;
select * from jx_t3;
c
6
set autocommit = on;
drop user jx_user;
drop database jx_db;