I found a simple solution, but i don't know how to add raises an exception here.
create rule protect_profile_id0_update as on update to web.profile
where old.id = 0 do instead nothing;
create rule protect_profile_id0_delete as on delete to web.profile
where old.id = 0 do instead nothing;
2011/12/19 Thomas Markus <t.markus@proventis.net>:
> Hi,
>
> create a delete trigger that raises an exception
>
> Thomas
>
>
> Am 19.12.2011 07:43, schrieb Капралов Александр:
>
>> Hi all.
>>
>> How to make a non-removable row in a table?
>>
>> In my case, I should not accidentally delete a row with id = 0.
>>
>> CREATE TABLE profile (
>>
>> id integer NOT NULL,
>>
>> name character varying(265) NOT NULL
>>
>> );
>>
>> CREATE SEQUENCE profile_id_seq
>> START WITH 1
>> INCREMENT BY 1
>> NO MAXVALUE
>> NO MINVALUE
>> CACHE 1;
>>
>> ALTER TABLE profile ALTER COLUMN id SET DEFAULT
>> nextval('profile_id_seq'::regclass);
>>
>> ALTER TABLE ONLY profile ADD CONSTRAINT profile_pkey PRIMARY KEY (id);
>>
>> INSERT INTO profile VALUES (0,'non-removable Profile');
>>
>
>
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