mariadb/mysql-test/suite/perfschema/t/global_read_lock.test

# Copyright (C) 2009 Sun Microsystems, Inc
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

# Tests for PERFORMANCE_SCHEMA
#
# Test the effect of a flush tables with read lock on SETUP_ tables.

--source include/not_embedded.inc
--source include/have_perfschema.inc

use performance_schema;

grant SELECT, UPDATE, LOCK TABLES on performance_schema.* to pfsuser@localhost;
flush privileges;

--echo connect (con1, localhost, pfsuser, , test);
connect (con1, localhost, pfsuser, , test);

lock tables performance_schema.SETUP_INSTRUMENTS read;
--disable_result_log
select * from performance_schema.SETUP_INSTRUMENTS;
--enable_result_log
unlock tables;

lock tables performance_schema.SETUP_INSTRUMENTS write;
update performance_schema.SETUP_INSTRUMENTS set enabled='NO';
update performance_schema.SETUP_INSTRUMENTS set enabled='YES';
unlock tables;

--echo connection default;
connection default;

flush tables with read lock;

--echo connection con1;
connection con1;

lock tables performance_schema.SETUP_INSTRUMENTS read;
--disable_result_log
select * from performance_schema.SETUP_INSTRUMENTS;
--enable_result_log
unlock tables;

# This will block
--send
lock tables performance_schema.SETUP_INSTRUMENTS write;

--echo connection default;
connection default;

let $wait_condition= select 1 from performance_schema.EVENTS_WAITS_CURRENT where event_name like "wait/synch/cond/sql/COND_global_read_lock";

--source include/wait_condition.inc

# Observe the blocked thread in the performance schema :)
select event_name,
  left(source, locate(":", source)) as short_source,
  timer_end, timer_wait, operation
  from performance_schema.EVENTS_WAITS_CURRENT
  where event_name like "wait/synch/cond/sql/COND_global_read_lock";

unlock tables;

connection con1;
--reap

update performance_schema.SETUP_INSTRUMENTS set enabled='NO';
update performance_schema.SETUP_INSTRUMENTS set enabled='YES';
unlock tables;

disconnect con1;
--source include/wait_until_disconnected.inc

--echo connection default;
connection default;

drop user pfsuser@localhost;
flush privileges;