DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (1,'f'),(2,'b');
SET LOW_PRIORITY_UPDATES = 0;
SET lock_wait_timeout = 4;
connect  con1,localhost,root,,;
SET lock_wait_timeout = 2;
SELECT SLEEP(1) FROM t1;
connection default;
DELETE FROM t1;
connect  con2,localhost,root,,;
SET lock_wait_timeout = 3;
SELECT SLEEP(1) FROM t1;
SLEEP(1)
connection con1;
SLEEP(1)
0
0
connection default;
SELECT a,b FROM t1;
a	b
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b');
connection con1;
SELECT SLEEP(1) FROM t1;
connection default;
DELETE LOW_PRIORITY FROM t1;
connection con2;
SELECT SLEEP(1) FROM t1;
SLEEP(1)
0
0
connection con1;
SLEEP(1)
0
0
connection default;
SELECT a,b FROM t1;
a	b
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b');
SET LOW_PRIORITY_UPDATES = 1;
connection con1;
SELECT SLEEP(1) FROM t1;
connection default;
DELETE FROM t1;
connection con2;
SELECT SLEEP(1) FROM t1;
SLEEP(1)
0
0
connection con1;
SLEEP(1)
0
0
connection default;
SELECT a,b FROM t1;
a	b
disconnect con1;
disconnect con2;
DROP TABLE t1;