DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
REPLACE INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e');
SELECT a,b FROM t1;
a	b
1	a
2	b
3	c
4	d
5	e
REPLACE t1 (a,b) VALUE (10,'foo'),(10,'foo');
SELECT a,b FROM t1;
a	b
1	a
10	foo
10	foo
2	b
3	c
4	d
5	e
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>, UNIQUE INDEX (a)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
REPLACE INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c');
INSERT INTO t1 (a,b) VALUES (2,'d');
ERROR 23000: Duplicate entry '2' for key 'a'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY). 
# If you got a difference in error message, just add it to rdiff file
REPLACE INTO t1 (a,b) VALUES (2,'d');
SELECT a,b FROM t1;
a	b
1	a
2	d
3	c
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>, PRIMARY KEY (b)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
REPLACE INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c');
INSERT INTO t1 (a,b) VALUES (4,'b');
ERROR 23000: Duplicate entry 'b' for key 'PRIMARY'
# Statement ended with one of expected results (ER_DUP_ENTRY,ER_DUP_KEY). 
# If you got a difference in error message, just add it to rdiff file
REPLACE INTO t1 (a,b) VALUES (4,'b');
SELECT a,b FROM t1;
a	b
1	a
3	c
4	b
DROP TABLE t1;