drop table if exists t1,t2;
drop DATABASE if exists mysqltest_1;
connect  locker,localhost,root,,;
connect  locker2,localhost,root,,;
connect  reader,localhost,root,,;
connect  writer,localhost,root,,;
connection locker;
create table t1(n int);
insert into t1 values (1);
connection locker2;
select get_lock("mysqltest_lock", 100);
get_lock("mysqltest_lock", 100)
1
connection locker;
update t1 set n = 2 and get_lock('mysqltest_lock', 100);
connection writer;
update low_priority t1 set n = 4;
connection reader;
select n from t1;
connection locker2;
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
connection locker;
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
connection writer;
connection reader;
n
4
drop table t1;
connection locker;
create table t1(n int);
insert into t1 values (1),(2);
connection locker2;
select get_lock("mysqltest_lock", 100);
get_lock("mysqltest_lock", 100)
1
connection locker;
select n from t1 where get_lock('mysqltest_lock', 100);
connection writer;
update low_priority t1 set n = 4;
connection reader;
select n from t1;
n
1
2
connection locker2;
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
connection locker;
n
1
2
select release_lock("mysqltest_lock");
release_lock("mysqltest_lock")
1
connection writer;
drop table t1;
connection locker;
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;
connection writer;
update t1,t2 set c=a where b=d;
connection reader;
select c from t2;
c
2
connection locker;
unlock tables;
drop table t1;
drop table t2;
connection locker;
create table t1 (a int);
create table t2 (a int);
lock table t1 write, t2 write;
connection reader;
insert t1 select * from t2;
connection locker;
drop table t2;
unlock tables;
connection reader;
ERROR 42S02: Table 'test.t2' doesn't exist
connection locker;
drop table t1;
connection locker;
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;
connection reader;
insert t1 select * from t2;
connection locker;
drop table t2;
unlock tables;
connection reader;
ERROR 42S02: Table 'test.t2' doesn't exist
connection locker;
drop table t1;
End of 4.1 tests
create table t1(a int);
lock tables t1 write;
connection reader;
show columns from t1;
Field	Type	Null	Key	Default	Extra
a	int(11)	YES		NULL	
connection locker;
unlock tables;
drop table t1;
connection locker;
USE mysql;
LOCK TABLES columns_priv WRITE, db WRITE, user WRITE;
FLUSH TABLES;
connection reader;
USE mysql;
SELECT global_priv.host FROM global_priv, db WHERE global_priv.user = db.user LIMIT 1;
connection locker;
OPTIMIZE TABLES columns_priv, db, global_priv;
Table	Op	Msg_type	Msg_text
mysql.columns_priv	optimize	status	OK
mysql.db	optimize	status	OK
mysql.global_priv	optimize	status	OK
UNLOCK TABLES;
connection reader;
host
localhost
USE test;
connection locker;
use test;
connection default;
connection writer;
CREATE TABLE t1 (c1 int);
LOCK TABLE t1 WRITE;
connection locker;
FLUSH TABLES WITH READ LOCK;
connection writer;
CREATE TABLE t2 (c1 int);
ERROR HY000: Table 't2' was not locked with LOCK TABLES
UNLOCK TABLES;
connection locker;
UNLOCK TABLES;
connection default;
DROP TABLE t1;
connection writer;
CREATE TABLE t1 (c1 int);
LOCK TABLE t1 WRITE;
connection locker;
FLUSH TABLES WITH READ LOCK;
connection writer;
CREATE TABLE t2 AS SELECT * FROM t1;
ERROR HY000: Table 't2' was not locked with LOCK TABLES
UNLOCK TABLES;
connection locker;
UNLOCK TABLES;
connection default;
DROP TABLE t1;
connect  con1,localhost,root,,;
connect  con2,localhost,root,,;
connection con1;
CREATE DATABASE mysqltest_1;
FLUSH TABLES WITH READ LOCK;
connection con2;
DROP DATABASE mysqltest_1;
connection con1;
DROP DATABASE mysqltest_1;
ERROR HY000: Can't execute the query because you have a conflicting read lock
UNLOCK TABLES;
connection con2;
connection default;
disconnect con1;
disconnect con2;
DROP DATABASE mysqltest_1;
ERROR HY000: Can't drop database 'mysqltest_1'; database doesn't exist
connection locker;
set sql_mode="";
create table t1 (f1 int(12) unsigned not null auto_increment, primary key(f1)) engine=innodb;
set sql_mode=default;
lock tables t1 write;
connection writer;
alter table t1 auto_increment=0;
connection reader;
alter table t1 auto_increment=0;
connection locker;
unlock tables;
connection writer;
connection reader;
connection locker;
drop table t1;
connect  con1,localhost,root,,;
connect  con2,localhost,root,,;
connect  con3,localhost,root,,;
connect  con4,localhost,root,,;
connect  con5,localhost,root,,;
create table t1 (a int);
create table t2 like t1;
connection con1;
lock tables t1 write;
connection con2;
flush tables with read lock;
connection con5;
# global read lock is taken
connection con3;
select * from t2 for update;
connection con5;
# waiting for release of read lock
connection con4;
# would hang and later cause a deadlock
flush tables t2;
connection con1;
# clean up
unlock tables;
connection con2;
unlock tables;
connection con3;
a
connection con4;
connection default;
disconnect con5;
disconnect con4;
disconnect con3;
disconnect con2;
disconnect con1;
drop table t1,t2;
#
# Lightweight version:
# Ensure that the wait for a GRL is done before opening tables.
#
connect  con1,localhost,root,,;
connect  con2,localhost,root,,;
create table t1 (a int);
create table t2 like t1;
#
# UPDATE
#
connection default;
flush tables with read lock;
connection con1;
update t2 set a = 1;
connection default;
# statement is waiting for release of read lock
connection con2;
flush table t2;
connection default;
unlock tables;
connection con1;
connection con2;
#
# LOCK TABLES .. WRITE
#
connection default;
flush tables with read lock;
connection con1;
lock tables t2 write;
connection default;
# statement is waiting for release of read lock
connection con2;
flush table t2;
connection default;
unlock tables;
connection con1;
unlock tables;
connection default;
disconnect con2;
disconnect con1;
drop table t1,t2;
End of 5.0 tests
create table t1 (i int);
connection locker;
lock table t1 read;
connection writer;
update t1 set i= 10;
connection reader;
select * from t1;
connection default;
kill query ID;
connection reader;
i
connection writer;
ERROR 70100: Query execution was interrupted
connection locker;
unlock tables;
connection default;
drop table t1;
disconnect locker;
disconnect locker2;
disconnect reader;
disconnect writer;
drop table if exists t1;
create table t1 (i int);
connect  flush,localhost,root,,test,,;
connection default;
lock tables t1 write;
connection flush;
flush tables with read lock;;
connection default;
alter table t1 add column j int;
connect  insert,localhost,root,,test,,;
connection insert;
insert into t1 values (1,2);
connection default;
unlock tables;
connection flush;
select * from t1;
i	j
unlock tables;
connection insert;
connection default;
select * from t1;
i	j
1	2
drop table t1;
disconnect flush;
disconnect insert;
drop table if exists t1;
create table t1 (i int);
connect  flush,localhost,root,,test,,;
connection default;
lock tables t1 write;
connection flush;
flush tables with read lock;;
connection default;
flush tables;
unlock tables;
connection flush;
connection default;
disconnect flush;
drop table t1;
drop table if exists t1,t2;
create table t1 (a int);
flush status;
lock tables t1 read;
connect  waiter,localhost,root,,;
connection waiter;
insert into t1 values(1);
connection default;
unlock tables;
connection waiter;
connection default;
drop table t1;
disconnect waiter;
select @tlwa < @tlwb;
@tlwa < @tlwb
1
End of 5.1 tests
drop table if exists t1;
create table t1 (i int);
connect  flush,localhost,root,,test,,;
connection default;
lock tables t1 write;
connection flush;
flush tables with read lock;;
connection default;
flush tables;
drop table t1;
connection flush;
connection default;
disconnect flush;
#
# 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;
connect  con46272,localhost,root,,test,,;
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;;
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;
connection con46272;
# Reaping ALTER TABLE.
connection default;
disconnect con46272;
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;
#
CREATE TABLE t1 ( f1 integer );
CREATE VIEW v1 AS SELECT f1 FROM t1 ;
# Connection 2
connect  con2,localhost,root;
LOCK TABLES v1 WRITE, t1 READ;
FLUSH TABLE t1;
disconnect con2;
# Connection 1
connection default;
LOCK TABLES t1 WRITE;
FLUSH TABLE t1;
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 ;
connect  con2,localhost,root;
LOCK TABLES t1 WRITE, v1 READ;
FLUSH TABLE t1;
disconnect con2;
connection default;
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;
connect  con50913,localhost,root;
connection default;
create table t1 (i int);
create view v1 as select i from t1;
begin;
select * from t1;
i
connection con50913;
# Sending:
alter table t1 add column j int;
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;
connection con50913;
# Reaping ALTER TABLE;
connection default;
begin;
select * from v1;
i
connection con50913;
# Sending:
alter table t1 drop column j;
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;
connection con50913;
# Reaping ALTER TABLE;
connection default;
disconnect con50913;
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);
connect con2, localhost, root,,;
SET SESSION lock_wait_timeout= 1;
#
# Test 1: acquire exclusive lock
#
connection default;
START TRANSACTION;
INSERT INTO t1 VALUES (1);
connection con2;
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 con2;
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 con2;
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 con2;
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)
#
connect con3, localhost, root;
connection default;
LOCK TABLE t1 READ;
connection con3;
FLUSH TABLES;
# Sending:
FLUSH TABLES t1;
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
disconnect con2;
disconnect con3;
#
# Test for bug #51134 "Crash in MDL_lock::destroy on a concurrent
#                      DDL workload".
#
drop tables if exists t1, t2, t3;
connect  con1, localhost, root, , ;
connect  con2, localhost, root, , ;
connection default;
create table t3 (i int);
connection con1;
# Lock 't3' so upcoming RENAME is blocked.
lock table t3 read;
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;;
connection default;
# Wait until RENAME TABLE is blocked on table 't3'.
# Kill RENAME TABLE.
kill query ID;
connection con2;
# RENAME TABLE should be aborted but should not crash.
ERROR 70100: Query execution was interrupted
connection con1;
unlock tables;
connection default;
disconnect con1;
disconnect con2;
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;
connect  con1, localhost, root;
CREATE TEMPORARY TABLE t1 (id INT);
ALTER TABLE t1 ADD COLUMN j INT;
connection default;
disconnect con1;
UNLOCK TABLES;
DROP TABLE t1;