243 lines
6.7 KiB
Plaintext
243 lines
6.7 KiB
Plaintext
set @old_concurrent_insert= @@global.concurrent_insert;
|
|
set @@global.concurrent_insert= 0;
|
|
SET @old_log_output = @@global.log_output;
|
|
SET GLOBAL LOG_OUTPUT = 'FILE';
|
|
flush status;
|
|
show status like 'Table_lock%';
|
|
Variable_name Value
|
|
Table_locks_immediate 0
|
|
Table_locks_waited 0
|
|
select * from information_schema.session_status where variable_name like 'Table_lock%';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
TABLE_LOCKS_IMMEDIATE 0
|
|
TABLE_LOCKS_WAITED 0
|
|
# Switched to connection: con1
|
|
set sql_log_bin=0;
|
|
set @old_general_log = @@global.general_log;
|
|
set global general_log = 'OFF';
|
|
drop table if exists t1;
|
|
create table t1(n int) engine=myisam;
|
|
insert into t1 values(1);
|
|
select 1;
|
|
1
|
|
1
|
|
# Switched to connection: con2
|
|
lock tables t1 read;
|
|
unlock tables;
|
|
lock tables t1 read;
|
|
# Switched to connection: con1
|
|
update t1 set n = 3;
|
|
# Switched to connection: con2
|
|
unlock tables;
|
|
# Switched to connection: con1
|
|
show status like 'Table_locks_waited';
|
|
Variable_name Value
|
|
Table_locks_waited 1
|
|
drop table t1;
|
|
set global general_log = @old_general_log;
|
|
# Switched to connection: default
|
|
select 1;
|
|
1
|
|
1
|
|
show status like 'last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 0.000000
|
|
create table t1 (a int);
|
|
insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
|
|
insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
|
|
insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
|
|
insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
|
|
insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
|
|
select * from t1 where a=6;
|
|
a
|
|
6
|
|
6
|
|
6
|
|
6
|
|
6
|
|
show status like 'last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 12.084449
|
|
show status like 'last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 12.084449
|
|
select 1;
|
|
1
|
|
1
|
|
show status like 'last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 0.000000
|
|
drop table t1;
|
|
FLUSH STATUS;
|
|
SHOW STATUS LIKE 'max_used_connections';
|
|
Variable_name Value
|
|
Max_used_connections 1
|
|
SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
MAX_USED_CONNECTIONS 1
|
|
SET @save_thread_cache_size=@@thread_cache_size;
|
|
SET GLOBAL thread_cache_size=3;
|
|
SHOW STATUS LIKE 'max_used_connections';
|
|
Variable_name Value
|
|
Max_used_connections 3
|
|
SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
MAX_USED_CONNECTIONS 3
|
|
FLUSH STATUS;
|
|
SHOW STATUS LIKE 'max_used_connections';
|
|
Variable_name Value
|
|
Max_used_connections 2
|
|
SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
MAX_USED_CONNECTIONS 2
|
|
SHOW STATUS LIKE 'max_used_connections';
|
|
Variable_name Value
|
|
Max_used_connections 3
|
|
SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
MAX_USED_CONNECTIONS 3
|
|
SHOW STATUS LIKE 'max_used_connections';
|
|
Variable_name Value
|
|
Max_used_connections 4
|
|
SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_used_connections';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
MAX_USED_CONNECTIONS 4
|
|
SET GLOBAL thread_cache_size=@save_thread_cache_size;
|
|
CREATE TABLE t1 ( a INT );
|
|
INSERT INTO t1 VALUES (1), (2);
|
|
SELECT a FROM t1 LIMIT 1;
|
|
a
|
|
1
|
|
SHOW SESSION STATUS LIKE 'Last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 2.402418
|
|
EXPLAIN SELECT a FROM t1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
|
SHOW SESSION STATUS LIKE 'Last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 2.402418
|
|
SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
|
|
a
|
|
1
|
|
2
|
|
SHOW SESSION STATUS LIKE 'Last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 0.000000
|
|
EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
|
2 UNION t1 ALL NULL NULL NULL NULL 2
|
|
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL Using filesort
|
|
SHOW SESSION STATUS LIKE 'Last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 0.000000
|
|
SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
|
|
a IN (SELECT a FROM t1)
|
|
1
|
|
SHOW SESSION STATUS LIKE 'Last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 0.000000
|
|
SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
|
|
x
|
|
1
|
|
SHOW SESSION STATUS LIKE 'Last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 0.000000
|
|
SELECT * FROM t1 a, t1 b LIMIT 1;
|
|
a a
|
|
1 1
|
|
SHOW SESSION STATUS LIKE 'Last_query_cost';
|
|
Variable_name Value
|
|
Last_query_cost 4.805836
|
|
DROP TABLE t1;
|
|
show status like 'com_show_status';
|
|
Variable_name Value
|
|
Com_show_status 3
|
|
show status like 'hand%write%';
|
|
Variable_name Value
|
|
Handler_write 0
|
|
show status like '%tmp%';
|
|
Variable_name Value
|
|
Created_tmp_disk_tables 0
|
|
Created_tmp_files 0
|
|
Created_tmp_tables 0
|
|
show status like 'hand%write%';
|
|
Variable_name Value
|
|
Handler_write 0
|
|
show status like '%tmp%';
|
|
Variable_name Value
|
|
Created_tmp_disk_tables 0
|
|
Created_tmp_files 0
|
|
Created_tmp_tables 0
|
|
show status like 'com_show_status';
|
|
Variable_name Value
|
|
Com_show_status 8
|
|
rnd_diff tmp_table_diff
|
|
20 8
|
|
flush status;
|
|
show status like 'Com%function';
|
|
Variable_name Value
|
|
Com_alter_function 0
|
|
Com_create_function 0
|
|
Com_drop_function 0
|
|
create function f1 (x INTEGER) returns integer
|
|
begin
|
|
declare ret integer;
|
|
set ret = x * 10;
|
|
return ret;
|
|
end //
|
|
drop function f1;
|
|
show status like 'Com%function';
|
|
Variable_name Value
|
|
Com_alter_function 0
|
|
Com_create_function 1
|
|
Com_drop_function 1
|
|
create database db37908;
|
|
create table db37908.t1(f1 int);
|
|
insert into db37908.t1 values(1);
|
|
grant usage,execute on test.* to mysqltest_1@localhost;
|
|
create procedure proc37908() begin select 1; end |
|
|
create function func37908() returns int sql security invoker
|
|
return (select * from db37908.t1 limit 1)|
|
|
select * from db37908.t1;
|
|
ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table 't1'
|
|
show status where variable_name ='uptime' and 2 in (select * from db37908.t1);
|
|
ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table 't1'
|
|
show procedure status where name ='proc37908' and 1 in (select f1 from db37908.t1);
|
|
ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table 't1'
|
|
show function status where name ='func37908' and 1 in (select func37908());
|
|
ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table 't1'
|
|
drop database db37908;
|
|
drop procedure proc37908;
|
|
drop function func37908;
|
|
REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
|
|
DROP USER mysqltest_1@localhost;
|
|
DROP PROCEDURE IF EXISTS p1;
|
|
DROP FUNCTION IF EXISTS f1;
|
|
CREATE FUNCTION f1() RETURNS INTEGER
|
|
BEGIN
|
|
DECLARE foo INTEGER;
|
|
DECLARE bar INTEGER;
|
|
SET foo=1;
|
|
SET bar=2;
|
|
RETURN foo;
|
|
END $$
|
|
CREATE PROCEDURE p1()
|
|
BEGIN
|
|
SELECT 1;
|
|
END $$
|
|
SELECT f1();
|
|
f1()
|
|
1
|
|
CALL p1();
|
|
1
|
|
1
|
|
SELECT 9;
|
|
9
|
|
9
|
|
DROP PROCEDURE p1;
|
|
DROP FUNCTION f1;
|
|
set @@global.concurrent_insert= @old_concurrent_insert;
|
|
SET GLOBAL log_output = @old_log_output;
|