CREATE TABLE t1 (
pk INT,
f1 VARCHAR(10) NOT NULL,
f2 VARCHAR(10) NULL,
f3 INT UNSIGNED NULL,
KEY (f1),
PRIMARY KEY (pk)
) ENGINE=InnoDB;
CREATE OR REPLACE ALGORITHM=MERGE VIEW v4 AS SELECT * FROM t1;
INSERT INTO t1 VALUES (1,'k','g',6),(2,'y','r',0),(3,'t','q',1),(4,'a','r',NULL),(5,'z','t',NULL);
CREATE TABLE t2 (f VARCHAR(10) NULL) ENGINE=InnoDB;
INSERT INTO t2 VALUES (NULL),('g'),('e'),('g');
CREATE TABLE t3 (
f1 VARCHAR(10) NOT NULL,
f2 VARCHAR(10) NULL,
f3 INT UNSIGNED NULL
) ENGINE=InnoDB;
INSERT INTO t3 VALUES ('k','n',9),('y','b',8),('m','w',6);
CREATE TABLE t4 (f INT NULL) ENGINE=InnoDB;
INSERT INTO t4 VALUES (8),(9);
UPDATE t1 SET t1.pk = -109 WHERE t1.f1 IN ( SELECT 'a' FROM t4 WHERE f >= 1 );
SET DEBUG_SYNC='now SIGNAL con1_dml';
connect  con1,localhost,root,,test;
SET DEBUG_SYNC='now WAIT_FOR con1_dml';
begin;
SELECT * FROM t1 for update;
pk	f1	f2	f3
-109	a	r	NULL
1	k	g	6
2	y	r	0
3	t	q	1
5	z	t	NULL
SET DEBUG_SYNC='now SIGNAL default_dml';
SET DEBUG_SYNC='now SIGNAL con2_dml';
connection default;
SET DEBUG_SYNC='now WAIT_FOR default_dml';
explain UPDATE t3 AS alias1 LEFT JOIN t3 AS alias2 ON ( alias1.f1 <> alias1.f2 ) SET alias1.f3 = 59 WHERE ( EXISTS ( SELECT t1.f3 FROM t1 IGNORE INDEX (f1) WHERE t1.f1 = alias1.f1 ) ) OR alias2.f1 = 'h';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	alias1	ALL	NULL	NULL	NULL	NULL	#	
1	PRIMARY	alias2	ALL	NULL	NULL	NULL	NULL	#	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	#	Using where
UPDATE t3 AS alias1 LEFT JOIN t3 AS alias2 ON ( alias1.f1 <> alias1.f2 ) SET alias1.f3 = 59 WHERE ( EXISTS ( SELECT t1.f3 FROM t1 IGNORE INDEX (f1) WHERE t1.f1 = alias1.f1 ) ) OR alias2.f1 = 'h';
connect  con2,localhost,root,,test;
set debug_sync='now WAIT_FOR con2_dml';
SET DEBUG_SYNC='now SIGNAL con1_dml2';
disconnect con2;
connection con1;
SET DEBUG_SYNC='now WAIT_FOR con1_dml2';
explain UPDATE v4, t1 SET t1.pk = 76 WHERE t1.f2 IN ( SELECT t2.f FROM t2 INNER JOIN t3 );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	index	NULL	f1	12	NULL	#	Using index
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	#	
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	13	func	#	
2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	#	
2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	#	
UPDATE v4, t1 SET t1.pk = 76 WHERE t1.f2 IN ( SELECT t2.f FROM t2 INNER JOIN t3 );
connection default;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
connection con1;
COMMIT;
disconnect con1;
connection default;
DROP VIEW v4;
DROP TABLE t1, t2, t3, t4;
set debug_sync= reset;