Thank Gleb,
I misunderstood the meaning of the manual..
this is from the manual ==
|SERIAL| is an alias for |BIGINT UNSIGNED NOT NULL AUTO_INCREMENT|.
|SERIAL DEFAULT VALUE| in the definition of an integer column is an
alias for |NOT NULL AUTO_INCREMENT UNIQUE|.
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
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
