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--disable_warnings
drop table if exists t1,t2;
--enable_warnings
connect (locker,localhost,root,,);
connect (reader,localhost,root,,);
connect (writer,localhost,root,,);
#
# Bug#19815 - CREATE/RENAME/DROP DATABASE can deadlock on a global read lock
#
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
#
connection con1;
CREATE DATABASE mysqltest_1;
FLUSH TABLES WITH READ LOCK;
#
# With bug in place: acquire LOCK_mysql_create_table and
# wait in wait_if_global_read_lock().
connection con2;
send DROP DATABASE mysqltest_1;
#
# With bug in place: try to acquire LOCK_mysql_create_table...
# When fixed: Reject dropping db because of the read lock.
connection con1;
let $wait_condition=
select count(*) = 1 from data_dictionary.processlist
where state = "Waiting for release of readlock"
and info = "DROP DATABASE mysqltest_1";
--source include/wait_condition.inc
--error ER_CANT_UPDATE_WITH_READLOCK
DROP DATABASE mysqltest_1;
UNLOCK TABLES;
#
connection con2;
reap;
#
connection default;
disconnect con1;
disconnect con2;
# This must have been dropped by connection 2 already,
# which waited until the global read lock was released.
--error ER_DB_DROP_EXISTS
DROP DATABASE mysqltest_1;
--echo End of 5.1 tests
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