create database if not exists events_test;
use events_test;
"Save the values"
SET @old_global_long_query_time:=(select get_value());
SET @old_session_long_query_time:=@@long_query_time;
SHOW VARIABLES LIKE 'log_slow_queries';
Variable_name	Value
log_slow_queries	ON
DROP FUNCTION get_value;
TRUNCATE mysql.slow_log;
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
user_host	query_time	db	sql_text
"Set new values"
SET GLOBAL long_query_time=4;
SET SESSION long_query_time=2;
"Check that logging is working"
SELECT SLEEP(3);
SLEEP(3)
0
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
user_host	query_time	db	sql_text
root[root] @ localhost []	00:00:03	events_test	SELECT SLEEP(3)
TRUNCATE mysql.slow_log;
CREATE TABLE slow_event_test (slo_val tinyint, val tinyint);
"This won't go to the slow log"
CREATE EVENT long_event ON SCHEDULE EVERY 1 MINUTE DO INSERT INTO slow_event_test SELECT @@long_query_time, SLEEP(3);
SELECT * FROM slow_event_test;
slo_val	val
SET GLOBAL event_scheduler=1;
"Sleep some more time than the actual event run will take"
SHOW VARIABLES LIKE 'event_scheduler';
Variable_name	Value
event_scheduler	ON
"Check our table. Should see 1 row"
SELECT * FROM slow_event_test;
slo_val	val
4	0
"Check slow log. Should not see anything because 3 is under the threshold of 4 for GLOBAL, though over SESSION which is 2"
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
user_host	query_time	db	sql_text
"This should go to the slow log"
SET SESSION long_query_time=10;
DROP EVENT long_event;
CREATE EVENT long_event2 ON SCHEDULE EVERY 1 MINUTE DO INSERT INTO slow_event_test SELECT @@long_query_time, SLEEP(5);
"Sleep some more time than the actual event run will take"
"Check our table. Should see 2 rows"
SELECT * FROM slow_event_test;
slo_val	val
4	0
4	0
"Check slow log. Should see 1 row because 5 is over the threshold of 4 for GLOBAL, though under SESSION which is 10"
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
user_host	query_time	db	sql_text
root[root] @ localhost [localhost]	00:00:05	events_test	INSERT INTO slow_event_test SELECT @@long_query_time, SLEEP(5)
DROP EVENT long_event2;
SET GLOBAL  long_query_time =@old_global_long_query_time;
SET SESSION long_query_time =@old_session_long_query_time;
TRUNCATE mysql.slow_log;
DROP TABLE slow_event_test;
drop database events_test;