DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a INT, b INT, c INT, UNIQUE (A), UNIQUE(B));
INSERT t1 VALUES (1,2,10), (3,4,20);
INSERT t1 VALUES (5,6,30) ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	20
5	6	30
INSERT t1 VALUES (5,7,40) ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	20
5	6	130
INSERT t1 VALUES (8,4,50) ON DUPLICATE KEY UPDATE c=c+1000;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	1020
5	6	130
INSERT t1 VALUES (1,4,60) ON DUPLICATE KEY UPDATE c=c+10000;
SELECT * FROM t1;
a	b	c
1	2	10010
3	4	1020
5	6	130
INSERT t1 VALUES (1,9,70) ON DUPLICATE KEY UPDATE c=c+100000, b=4;
ERROR 23000: Duplicate entry '4' for key 2
SELECT * FROM t1;
a	b	c
1	2	10010
3	4	1020
5	6	130
TRUNCATE TABLE t1;
INSERT t1 VALUES (1,2,10), (3,4,20);
INSERT t1 VALUES (5,6,30), (7,4,40), (8,9,60) ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	120
5	6	30
8	9	60
INSERT t1 SET a=5 ON DUPLICATE KEY UPDATE b=0;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	120
5	0	30
8	9	60
INSERT t1 VALUES (2,1,11), (7,4,40) ON DUPLICATE KEY UPDATE c=c+VALUES(a);
SELECT *, VALUES(a) FROM t1;
a	b	c	VALUES(a)
1	2	10	NULL
3	4	127	NULL
5	0	30	NULL
8	9	60	NULL
2	1	11	NULL
explain extended SELECT *, VALUES(a) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	
Warnings:
Note	1003	select high_priority test.t1.a AS `a`,test.t1.b AS `b`,test.t1.c AS `c`,values(test.t1.a) AS `VALUES(a)` from test.t1
explain extended select * from t1 where values(a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
Warnings:
Note	1003	select high_priority test.t1.a AS `a`,test.t1.b AS `b`,test.t1.c AS `c` from test.t1
DROP TABLE t1;
