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# Let's see if FLUSH TABLES WITH READ LOCK blocks COMMIT of existing
# transactions.
# We verify that we did not introduce a deadlock.
# This is intended to mimick how mysqldump and innobackup work.
# And it requires InnoDB
-- source include/have_innodb.inc
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
connect (con3,localhost,root,,);
connection con1;
--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (a int) engine=innodb;
# blocks COMMIT ?
begin;
insert into t1 values(1);
connection con2;
flush tables with read lock;
select * from t1;
connection con1;
send commit; # blocked by con2
sleep 1;
connection con2;
select * from t1; # verify con1 was blocked and data did not move
unlock tables;
connection con1;
reap;
# No deadlock ?
connection con1;
begin;
select * from t1 for update;
connection con2;
begin;
send select * from t1 for update; # blocked by con1
sleep 1;
connection con3;
send flush tables with read lock; # blocked by con2
connection con1;
commit; # should not be blocked by con3
connection con2;
reap;
connection con3;
reap;
unlock tables;
# BUG#6732 FLUSH TABLES WITH READ LOCK + COMMIT hangs later FLUSH TABLES
# WITH READ LOCK
connection con2;
commit; # unlock InnoDB row locks to allow insertions
connection con1;
begin;
insert into t1 values(10);
flush tables with read lock;
commit;
unlock tables;
connection con2;
flush tables with read lock; # bug caused hang here
unlock tables;
# BUG#7358 SHOW CREATE DATABASE fails if open transaction
begin;
select * from t1;
show create database test;
drop table t1;
# End of 4.1 tests
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