drop table if exists t;
# Create test table
create table t(id INT PRIMARY KEY) engine=InnoDB;
# Insert two rows to test table
insert into t values(1);
insert into t values(2);
insert into t values(3);
SET GLOBAL SLOW_QUERY_LOG=ON;
SELECT sleep(2);
sleep(2)
0
set min_examined_row_limit=5;
SELECT sleep(2) union select t2.id from t as t1,t as t2;
sleep(2)
0
1
2
3
SELECT sleep(2);
sleep(2)
0
SET GLOBAL SLOW_QUERY_LOG=OFF;
drop table if exists t;
FLUSH LOGS;
2
