drop table if exists t1,t2;
drop DATABASE if exists mysqltest_1;
create table t1(n int);
insert into t1 values (1);
select get_lock("mysqltest_lock", 100);
get_lock("mysqltest_lock", 100)
1
update t1 set n = 2 and get_lock('mysqltest_lock', 100);
update low_priority t1 set n = 4;
select n from t1;
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
n
4
drop table t1;
create table t1(n int);
insert into t1 values (1),(2);
select get_lock("mysqltest_lock", 100);
get_lock("mysqltest_lock", 100)
1
select n from t1 where get_lock('mysqltest_lock', 100);
update low_priority t1 set n = 4;
select n from t1;
n
1
2
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
n
1
2
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
drop table t1;
create table t1 (a int, b int);
create table t2 (c int, d int);
insert into t1 values(1,1);
insert into t1 values(2,2);
insert into t2 values(1,2);
lock table t1 read;
update t1,t2 set c=a where b=d;
select c from t2;
c
2
unlock tables;
drop table t1;
drop table t2;
create table t1 (a int);
create table t2 (a int);
lock table t1 write, t2 write;
insert t1 select * from t2;
drop table t2;
unlock tables;
ERROR 42S02: Table 'test.t2' doesn't exist
drop table t1;
create table t1 (a int);
create table t2 (a int);
lock table t1 write, t2 write, t1 as t1_2 write, t2 as t2_2 write;
insert t1 select * from t2;
drop table t2;
unlock tables;
ERROR 42S02: Table 'test.t2' doesn't exist
drop table t1;
End of 4.1 tests
create table t1(a int);
lock tables t1 write;
show columns from t1;
Field	Type	Null	Key	Default	Extra
a	int(11)	YES		NULL	
unlock tables;
drop table t1;
USE mysql;
LOCK TABLES columns_priv WRITE, db WRITE, host WRITE, user WRITE;
FLUSH TABLES;
USE mysql;
SELECT user.Select_priv FROM user, db WHERE user.user = db.user LIMIT 1;
OPTIMIZE TABLES columns_priv, db, host, user;
Table	Op	Msg_type	Msg_text
mysql.columns_priv	optimize	status	OK
mysql.db	optimize	status	OK
mysql.host	optimize	status	OK
mysql.user	optimize	status	OK
UNLOCK TABLES;
Select_priv
N
USE test;
use test;
CREATE TABLE t1 (c1 int);
LOCK TABLE t1 WRITE;
FLUSH TABLES WITH READ LOCK;
CREATE TABLE t2 (c1 int);
ERROR HY000: Table 't2' was not locked with LOCK TABLES
UNLOCK TABLES;
UNLOCK TABLES;
DROP TABLE t1;
CREATE TABLE t1 (c1 int);
LOCK TABLE t1 WRITE;
FLUSH TABLES WITH READ LOCK;
CREATE TABLE t2 AS SELECT * FROM t1;
ERROR HY000: Table 't2' was not locked with LOCK TABLES
UNLOCK TABLES;
UNLOCK TABLES;
DROP TABLE t1;
CREATE DATABASE mysqltest_1;
FLUSH TABLES WITH READ LOCK;
DROP DATABASE mysqltest_1;
DROP DATABASE mysqltest_1;
ERROR HY000: Can't execute the query because you have a conflicting read lock
UNLOCK TABLES;
DROP DATABASE mysqltest_1;
ERROR HY000: Can't drop database 'mysqltest_1'; database doesn't exist
create table t1 (f1 int(12) unsigned not null auto_increment, primary key(f1)) engine=innodb;
lock tables t1 write;
alter table t1 auto_increment=0;
alter table t1 auto_increment=0;
unlock tables;
drop table t1;
create table t1 (a int);
create table t2 like t1;
# con1
lock tables t1 write;
# con2
flush tables with read lock;
# con5
# global read lock is taken
# con3
select * from t2 for update;
# waiting for release of read lock
# con4
# would hang and later cause a deadlock
flush tables t2;
# clean up
unlock tables;
unlock tables;
a
drop table t1,t2;
#
# Lightweight version:
# Ensure that the wait for a GRL is done before opening tables.
#
create table t1 (a int);
create table t2 like t1;
#
# UPDATE
#
# default
flush tables with read lock;
# con1
update t2 set a = 1;
# default
# statement is waiting for release of read lock
# con2
flush table t2;
# default
unlock tables;
# con1
#
# LOCK TABLES .. WRITE
#
# default
flush tables with read lock;
# con1
lock tables t2 write;
# default
# statement is waiting for release of read lock
# con2
flush table t2;
# default
unlock tables;
# con1
unlock tables;
drop table t1,t2;
End of 5.0 tests
create table t1 (i int);
lock table t1 read;
update t1 set i= 10;
select * from t1;
kill query ID;
i
ERROR 70100: Query execution was interrupted
unlock tables;
drop table t1;
drop table if exists t1;
create table t1 (i int);
connection: default
lock tables t1 write;
connection: flush
flush tables with read lock;;
connection: default
alter table t1 add column j int;
connection: insert
insert into t1 values (1,2);;
connection: default
unlock tables;
connection: flush
select * from t1;
i	j
unlock tables;
select * from t1;
i	j
1	2
drop table t1;
drop table if exists t1;
create table t1 (i int);
connection: default
lock tables t1 write;
connection: flush
flush tables with read lock;;
connection: default
flush tables;
unlock tables;
drop table t1;
drop table if exists t1,t2;
create table t1 (a int);
flush status;
lock tables t1 read;
insert into t1 values(1);
unlock tables;
drop table t1;
select @tlwa < @tlwb;
@tlwa < @tlwb
1
End of 5.1 tests
drop table if exists t1;
create table t1 (i int);
connection: default
lock tables t1 write;
connection: flush
flush tables with read lock;;
connection: default
flush tables;
drop table t1;
#
# Test for bug #46272 "MySQL 5.4.4, new MDL: unnecessary deadlock".
#
drop table if exists t1;
create table t1 (c1 int primary key, c2 int, c3 int);
insert into t1 values (1,1,0),(2,2,0),(3,3,0),(4,4,0),(5,5,0);
begin;
update t1 set c3=c3+1 where c2=3;
#
# Switching to connection 'con46272'.
# The below ALTER TABLE statement should wait till transaction
# in connection 'default' is complete and then succeed.
# It should not deadlock or fail with ER_LOCK_DEADLOCK error.
# Sending:
alter table t1 add column c4 int;;
#
# Switching to connection 'default'.
# Wait until the above ALTER TABLE gets blocked because this
# connection holds SW metadata lock on table to be altered.
# The below statement should succeed. It should not
# deadlock or end with ER_LOCK_DEADLOCK error.
update t1 set c3=c3+1 where c2=4;
# Unblock ALTER TABLE by committing transaction.
commit;
#
# Switching to connection 'con46272'.
# Reaping ALTER TABLE.
#
# Switching to connection 'default'.
drop table t1;
#
# Bug#47249 assert in MDL_global_lock::is_lock_type_compatible
#
DROP TABLE IF EXISTS t1;
DROP VIEW  IF EXISTS v1;
#
# Test 1: LOCK TABLES v1 WRITE, t1 READ;
#
# Thanks to the fact that we no longer allow DDL on tables
# which are locked for write implicitly, the exact scenario
# in which assert was failing is no longer repeatable.
CREATE TABLE t1 ( f1 integer );
CREATE VIEW v1 AS SELECT f1 FROM t1 ;
LOCK TABLES v1 WRITE, t1 READ;
FLUSH TABLE t1;
ERROR HY000: Table 't1' was locked with a READ lock and can't be updated
UNLOCK TABLES;
DROP TABLE t1;
DROP VIEW v1;
#
# Test 2: LOCK TABLES t1 WRITE, v1 READ;
#
CREATE TABLE t1 ( f1 integer );
CREATE VIEW v1 AS SELECT f1 FROM t1 ;
# Connection 2
LOCK TABLES t1 WRITE, v1 READ;
FLUSH TABLE t1;
# Connection 1
LOCK TABLES t1 WRITE;
FLUSH TABLE t1;
DROP TABLE t1;
DROP VIEW v1;
#
# Test for bug #50913 "Deadlock between open_and_lock_tables_derived
# and MDL". Also see additional coverage in mdl_sync.test.
# 
drop table if exists t1;
drop view if exists v1;
create table t1 (i int);
create view v1 as select i from t1;
begin;
select * from t1;
i
# Switching to connection 'con50913'.
# Sending:
alter table t1 add column j int;
# Switching to connection 'default'.
# Wait until ALTER TABLE gets blocked.
# The below statement should try to acquire SW lock on 't1'
# and therefore should get ER_LOCK_DEADLOCK error. Before
# bug fix it acquired SR lock and hung on thr_lock.c lock.
delete a from t1 as a where i = 1;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
# Unblock ALTER TABLE.
commit;
# Switching to connection 'con50913'.
# Reaping ALTER TABLE;
# Switching to connection 'default'.
begin;
select * from v1;
i
# Switching to connection 'con50913'.
# Sending:
alter table t1 drop column j;
# Switching to connection 'default'.
# Wait until ALTER TABLE gets blocked.
# The below statement should try to acquire SW lock on 't1'
# and therefore should get ER_LOCK_DEADLOCK error. Before
# bug fix it acquired SR lock and hung on thr_lock.c lock.
insert into v1 values (1);
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
# Unblock ALTER TABLE.
commit;
# Switching to connection 'con50913'.
# Reaping ALTER TABLE;
# Switching to connection 'default'.
drop view v1;
drop table t1;
#
# Bug#45225 Locking: hang if drop table with no timeout
#
# These tests also provide function coverage for the
# lock_wait_timeout server variable.
#
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (id int);
SET SESSION lock_wait_timeout= 1;
#
# Test 1: acquire exclusive lock
#
# Connection default
START TRANSACTION;
INSERT INTO t1 VALUES (1);
# Connection 2
DROP TABLE t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
# Connection default
COMMIT;
#
# Test 2: upgrade shared lock
#
# Connection default
START TRANSACTION;
SELECT * FROM t1;
id
1
# Connection 2
ALTER TABLE t1 RENAME TO t2;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
# Connection default
COMMIT;
#
# Test 3: acquire shared lock
#
# Connection default
LOCK TABLE t1 WRITE;
# Connection 2
INSERT INTO t1(id) VALUES (2);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
# Connection default
UNLOCK TABLES;
#
# Test 4: table level locks
#
# Connection default
LOCK TABLE t1 READ;
# Connection 2
INSERT INTO t1(id) VALUES(4);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
# Connection default
UNLOCK TABLES;
#
# Test 5: Waiting on Table Definition Cache (TDC)
#
# Connection default
LOCK TABLE t1 READ;
# Connection con3
# Sending:
FLUSH TABLES;
# Connection con2
SELECT * FROM t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
# Connection default
UNLOCK TABLES;
# Connection con3
# Reaping: FLUSH TABLES
#
# Test 6: Timeouts in I_S queries
#
# Connection default
CREATE TABLE t2 (id INT);
LOCK TABLE t2 WRITE;
# Connection con3
# Sending:
DROP TABLE t1, t2;
# Connection con2
SELECT table_name, table_comment FROM information_schema.tables
WHERE table_schema= 'test' AND table_name= 't1';
table_name	table_comment
t1	Lock wait timeout exceeded; try restarting transaction
Warnings:
Warning	1205	Lock wait timeout exceeded; try restarting transaction
# Connection default
UNLOCK TABLES;
# Connection con3
# Reaping: DROP TABLE t1, t2
# Connection default
# Cleanup
#
# Test for bug #51134 "Crash in MDL_lock::destroy on a concurrent
#                      DDL workload".
#
drop tables if exists t1, t2, t3;
create table t3 (i int);
# Switching to connection 'con1'
# Lock 't3' so upcoming RENAME is blocked.
lock table t3 read;
# Switching to connection 'con2'
# Remember ID for this connection.
# Start statement which will try to acquire two instances
# of X metadata lock on the same object.
# Sending:
rename tables t1 to t2, t2 to t3;;
# Switching to connection 'default'
# Wait until RENAME TABLE is blocked on table 't3'.
# Kill RENAME TABLE.
kill query ID;
# Switching to connection 'con2'
# RENAME TABLE should be aborted but should not crash.
ERROR 70100: Query execution was interrupted
# Switching to connection 'con1'
unlock tables;
# Switching to connection 'default'
drop table t3;
# 
# Test for the bug where upgradable metadata locks was acquired
# even if the table to altered was temporary.
# Bug found while working on the related bug #51240.
#
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (id INT);
LOCK TABLE t1 WRITE;
# Connection con1
CREATE TEMPORARY TABLE t1 (id INT);
ALTER TABLE t1 ADD COLUMN j INT;
# Connection default
UNLOCK TABLES;
DROP TABLE t1;
