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DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a <INT_COLUMN> AUTO_INCREMENT, b <CHAR_COLUMN>, PRIMARY KEY (a,b)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (b) VALUES ('a'),('b'),('b'),('c'),('a');
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
1
SELECT * FROM t1;
a b
1 a
2 b
3 b
4 c
5 a
DROP TABLE t1;
CREATE TABLE t1 (a <CHAR_COLUMN>, b <INT_COLUMN> AUTO_INCREMENT, PRIMARY KEY (a,b)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a) VALUES ('a'),('b'),('b'),('c'),('a');
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
1
SELECT * FROM t1;
a b
a 1
a 2
b 1
b 2
c 1
DROP TABLE t1;
CREATE TABLE t1 (a <CHAR_COLUMN>, b <INT_COLUMN> AUTO_INCREMENT, PRIMARY KEY (a,b), <CUSTOM_INDEX>(b)) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a) VALUES ('a'),('b'),('b'),('c'),('a');
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
1
SELECT * FROM t1;
a b
a 1
a 5
b 2
b 3
c 4
DROP TABLE t1;
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