If i do exactly likes what is mention in section 15.7.1 page 807 of the MySQL Reference Manual 5.0.3-Alpha i get :
mysql> use test
Database changed
mysql> create table customer (a int, b char(20), index (a)) type=InnoDB;
Query OK, 0 rows affected, 2 warnings (0.05 sec)
mysql> begin;
Query OK, 0...