Hello.
SERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE. So you really specifying two keys (primary and unique). See: http://dev.mysql.com/doc/mysql/en/news-4-1-0.html http://bugs.mysql.com/bug.php?id=13140 Kemin Zhou <[EMAIL PROTECTED]> wrote: > I recently discovered that the following > > create table ttt ( > id serial primary key, > txt text > ); > > show index from ttt > > is telling me that there is a primary ke on id column with BTREE > and at the same time, there is another unique index on the id column. > > This is redundant. > > if the id column had been specified as > > id integer auto_increment primary key, > then there is only one primary key > > So it looks that there is a bug in the mysql source code. > Could some exper please confirm my opinion? > > I am using version 4.1 > > Kemin > > > -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.NET http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Gleb Paharenko / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.NET <___/ www.mysql.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
