ALTER TABLE with TYPE serial does not work

Hi List,

I have a short question to psql.

Why does this not work:

postgres=# ALTER TABLE tab1 ALTER COLUMN nr TYPE serial;
ERROR: type "serial" does not exist

but this:

postgres=# ALTER TABLE tab1 DROP COLUMN nr;
ALTER TABLE
postgres=# ALTER TABLE tab1 ADD COLUMN nr serial;
NOTICE: ALTER TABLE will create implicit sequence "tab1_nr_seq" for
serial column "tab1.nr"
ALTER TABLE

Sitting in front of a MAC OS X Leo with pg 8.2

Thanks a lot!

Cheers

Andy
--
St.Pauli - Hamburg - Germany

Andreas Wenk