Current File : //usr/share/mysql-test/suite/perfschema/t/global_read_lock.test
# 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;
# Make test robust against errors in other tests.
# Ensure that instrumentation is turned on when we create new connection.
update performance_schema.setup_instruments set enabled='YES';
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/MDL_context::COND_wait_status";
--source include/wait_condition.inc
# Observe the blocked thread in the performance schema :)
select event_name,
left(source, locate(":", source)) as short_source,
if(timer_end IS NULL, NULL, "SET") as timer_end,
if(timer_wait IS NULL, NULL, "SET") as timer_wait,
operation
from performance_schema.events_waits_current
where event_name like "wait/synch/cond/sql/MDL_context::COND_wait_status";
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;
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