From: | Vivek Khera <khera(at)kcilink(dot)com> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | adding column with not null constraint |
Date: | 2002-10-18 20:12:01 |
Message-ID: | x7u1jjmrqm.fsf@onceler.kciLink.com |
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Thread: | |
Lists: | pgsql-sql |
I'm looking to add a column to my database with not null and a default
value:
vk=> alter table msg_owner add column user_optional_fields varchar(255) NOT NULL default '';
ERROR: Adding columns with defaults is not implemented.
Add the column, then use ALTER TABLE SET DEFAULT.
vk=> alter table msg_owner add column user_optional_fields varchar(255) NOT NULL ;
ERROR: Adding NOT NULL columns is not implemented.
Add the column, then use ALTER TABLE ADD CONSTRAINT.
Ok, so we can succeed with this:
ALTER TABLE msg_owner ADD COLUMN user_optional_fields VARCHAR(255);
ALTER TABLE msg_owner ALTER user_optional_fields SET DEFAULT '';
UPDATE msg_owner SET user_optional_fields = '';
Now my problem is I cannot find any syntax for ALTER TABLE ADD
CONSTRAINT to put a NOT NULL constraint on a column. Can someone help
me here?
I'm using Postgres 7.2.1 on FreeBSD 4.6.
Thanks.
--
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Vivek Khera, Ph.D. Khera Communications, Inc.
Internet: khera(at)kciLink(dot)com Rockville, MD +1-240-453-8497
AIM: vivekkhera Y!: vivek_khera http://www.khera.org/~vivek/
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