Обсуждение: Probleme on ALTER

Hello !

I have this table :

    Attribute    |     Type     |               Modifier
-----------------+--------------+---------------------------------------
 ref             | integer      | default nextval('cvdb_ref_seq'::text)
 nom             | varchar(50)  |
 prenom          | varchar(50)  |
 email           | varchar(100) |
 password        | varchar(20)  |


but i forgot to do "NOT NULL" on the fields.

I try ALTER table ALTER COLUMN ref ADD CONSTRAINT NOT NULL but it doesn't work.

Does someone have the right solution ?

thanks for answer.

--

Mickaël JOUANNE
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In 7.0, you have to go into pg_attribute and set
attnotnull manually and make sure that there already
isn't null data.  In 7.1, you can do the above or
you should be able to just add a table check constraint.

BTW: Was the alter you tried something you'd seen in
another database or just a guess?  I've been wondering
about appropriate syntax for that since I haven't
seen one in sql92 (other than adding a table constraint
that checks the column against null).

Stephan Szabo
sszabo@bigpanda.com

On Wed, 8 Nov 2000, [iso-8859-1] Micka�l Jouanne wrote:

> Hello !
>
> I have this table :
>
>     Attribute    |     Type     |               Modifier
> -----------------+--------------+---------------------------------------
>  ref             | integer      | default nextval('cvdb_ref_seq'::text)
>  nom             | varchar(50)  |
>  prenom          | varchar(50)  |
>  email           | varchar(100) |
>  password        | varchar(20)  |
>
>
> but i forgot to do "NOT NULL" on the fields.
>
> I try ALTER table ALTER COLUMN ref ADD CONSTRAINT NOT NULL but it doesn't work.
>
> Does someone have the right solution ?

Forgot the simplest solution though, make a new table
with the correct structure and insert the data into it
and rename them into the right place :)