DP_S/build/lib/mysql/mysql-test/t/flush.test

connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
connection con1;

--disable_warnings
drop table if exists t1,t2;
drop database if exists mysqltest;
--enable_warnings

create temporary table t1(n int not null primary key);
create table t2(n int);
insert into t2 values(3);
let $1=100;
disable_query_log;
while ($1)
{
 connection con1;
 send replace into t1 select n from t2;
 connection con2;
 send flush tables;
 connection con1;
 reap;
 connection con2;
 reap;
 dec $1;
}
enable_query_log;
connection con1;
select * from t1;
connection con2;
flush tables with read lock;
--error 1223
drop table t2;
connection con1;
send drop table t2;
connection con2;
unlock tables;
connection con1;
reap;

#test if drop database will wait until we release the global read lock
connection con1;
create database mysqltest;
create table mysqltest.t1(n int);
insert into mysqltest.t1 values (23);
flush tables with read lock;
connection con2;
send drop database mysqltest;
connection con1;
select * from mysqltest.t1;
unlock tables;
connection con2;
reap;

# test if dirty close releases global read lock
connection con1;
create table t1 (n int);
flush tables with read lock;
dirty_close con1;
connection con2;
insert into t1 values (345);
select * from t1;
drop table t1;

#
# Bug#9459 - deadlock with flush with lock, and lock table write
#
create table t1 (c1 int);
lock table t1 write;
# Cannot get the global read lock with write locked tables.
--error 1192
flush tables with read lock;
lock table t1 read;
# Can get the global read lock with read locked tables.
flush tables with read lock;
--error 1223
lock table t1 write;
lock table t1 read;
--error 1223
lock table t1 write;
# Release all table locks and the global read lock.
unlock tables;
create table t2 (c1 int);
create table t3 (c1 int);
lock table t1 read, t2 read, t3 write;
# Cannot get the global read lock with write locked tables.
--error 1192
flush tables with read lock;
lock table t1 read, t2 read, t3 read;
# Can get the global read lock with read locked tables.
flush tables with read lock;
# Release all table locks and the global read lock.
unlock tables;
drop table t1, t2, t3;

# End of 4.1 tests

#
# Test of deadlock problem when doing FLUSH TABLE with read lock
# (Bug was in NTPL threads in Linux when using different mutex while
#  waiting for a condtion variable)

create table t1 (c1 int);
create table t2 (c1 int);

connect (con1,localhost,root,,);
connect (con3,localhost,root,,);

connection con1;
lock table t1 write;

connection con2;
send flush tables with read lock;
--sleep 1

connection con3;
send insert into t2 values(1);
--sleep 1

connection con1;
unlock tables;
disconnect con1;

connection con2;
reap;
disconnect con2;

connection con3;
# It hangs here (insert into t2 does not end).
reap;
disconnect con3;

connection default;
drop table t1, t2;

#
# Bug#32528 Global read lock with a low priority write lock causes a server crash
#

--disable_warnings
drop table if exists t1, t2;
--enable_warnings

set session low_priority_updates=1;

create table t1 (a int);
create table t2 (b int);

lock tables t1 write;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
flush tables with read lock;
unlock tables;

lock tables t1 read, t2 write;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
flush tables with read lock;
unlock tables;

lock tables t1 read;
flush tables with read lock;
unlock tables;

drop table t1, t2;

set session low_priority_updates=default;

#
# Bug #33334 mysqltest_embedded crashes when disconnecting before reap
#

connect (con1,localhost,root,,);
send select benchmark(200, (select sin(1))) > 1000;
disconnect con1;
--source include/wait_until_disconnected.inc
connection default;

--echo End of 5.0 tests

#
# Bug #26380: LOCK TABLES + FLUSH LOGS causes deadlock
#
set @old_general_log= @@general_log;
set @old_read_only= @@read_only;
set global general_log= on;

flush tables with read lock;
flush logs;
unlock tables;

set global read_only=1;
flush logs;
unlock tables;

flush tables with read lock;
flush logs;
unlock tables;

set global general_log= @old_general_log;
set global read_only= @old_read_only;

--echo End of 5.1 tests