drop table if exists test.t1,mysqltest.t1,mysqltest.t2;
drop database if exists mysqltest;
set GLOBAL query_cache_size=1355776;
reset query cache;
flush status;
----- establish connection root -----
show grants for current_user;
Grants for root@localhost
GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION
GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION
show grants;
Grants for root@localhost
GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION
GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION
create database if not exists mysqltest;
create table mysqltest.t1 (a int,b int,c int);
create table mysqltest.t2 (a int,b int,c int);
insert into mysqltest.t1 values (1,1,1),(2,2,2);
insert into mysqltest.t2 values (3,3,3);
create table test.t1 (a char (10));
insert into test.t1 values ("test.t1");
select * from t1;
a
test.t1
----- establish connection root2 -----
select * from t1;
a	b	c
1	1	1
2	2	2
select a from t1;
a
1
2
select c from t1;
c
1
2
select * from t2;
a	b	c
3	3	3
select * from mysqltest.t1,test.t1;
a	b	c	a
1	1	1	test.t1
2	2	2	test.t1
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits%";
Variable_name	Value
Qcache_hits	0
grant SELECT on mysqltest.* to mysqltest_1@localhost;
grant SELECT on mysqltest.t1 to mysqltest_2@localhost;
grant SELECT on test.t1 to mysqltest_2@localhost;
grant SELECT(a) on mysqltest.t1 to mysqltest_3@localhost;
----- establish connection user1 (user=mysqltest_1) -----
show grants for current_user();
Grants for mysqltest_1@localhost
GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost'
GRANT SELECT ON `mysqltest`.* TO 'mysqltest_1'@'localhost'
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	0
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	0
select "user1";
user1
user1
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	0
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	1
select * from t1;
a	b	c
1	1	1
2	2	2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	1
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	1
select a from t1 ;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	2
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	1
select c from t1;
c
1
2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	3
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	1
----- establish connection unkuser (user=unkuser) -----
show grants for current_user();
Grants for @localhost
GRANT USAGE ON *.* TO ''@'localhost'
----- establish connection user2 (user=mysqltest_2) -----
select "user2";
user2
user2
select * from t1;
a	b	c
1	1	1
2	2	2
select a from t1;
a
1
2
select c from t1;
c
1
2
select * from mysqltest.t1,test.t1;
a	b	c	a
1	1	1	test.t1
2	2	2	test.t1
select * from t2;
ERROR 42000: SELECT command denied to user 'mysqltest_2'@'localhost' for table 't2'
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	7
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	2
----- establish connection user3 (user=mysqltest_3) -----
select "user3";
user3
user3
select * from t1;
ERROR 42000: SELECT command denied to user 'mysqltest_3'@'localhost' for table 't1'
select a from t1;
a
1
2
select c from t1;
ERROR 42000: SELECT command denied to user 'mysqltest_3'@'localhost' for column 'c' in table 't1'
select * from t2;
ERROR 42000: SELECT command denied to user 'mysqltest_3'@'localhost' for table 't2'
select mysqltest.t1.c from test.t1,mysqltest.t1;
ERROR 42000: SELECT command denied to user 'mysqltest_3'@'localhost' for column 'c' in table 't1'
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	6
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	7
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	4
----- establish connection user4 (user=mysqltest_1) -----
select "user4";
user4
user4
show grants;
Grants for mysqltest_1@localhost
GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost'
GRANT SELECT ON `mysqltest`.* TO 'mysqltest_1'@'localhost'
select a from t1;
ERROR 3D000: No database selected
select * from mysqltest.t1,test.t1;
a	b	c	a
1	1	1	test.t1
2	2	2	test.t1
select a from mysqltest.t1;
a
1
2
select a from mysqltest.t1;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	8
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	8
show status like "Qcache_not_cached";
Variable_name	Value
Qcache_not_cached	5
----- close connections -----
----- switch to connection default -----
set names binary;
delete from mysql.user where user in ("mysqltest_1","mysqltest_2","mysqltest_3");
delete from mysql.db where user in ("mysqltest_1","mysqltest_2","mysqltest_3");
delete from mysql.tables_priv where user in ("mysqltest_1","mysqltest_2","mysqltest_3");
delete from mysql.columns_priv where user in ("mysqltest_1","mysqltest_2","mysqltest_3");
flush privileges;
drop table test.t1,mysqltest.t1,mysqltest.t2;
drop database mysqltest;
set GLOBAL query_cache_size=default;