Re: Query

hello

2008/6/24 kartik <kartik(at)v2technocrats(dot)com>:
> Hello there
>
> Can anyone please tell me how to make a column uneditable….
>
> Plz give me some output
>
> thans

try trigger

create table foo(
a varchar
);

create function a_update_trg()
returns trigger as $$
begin
if new.a is distinct from old.a then
raise exception 'cannot change column a';
end;
return new;
end;
$$ language plpgsql;

create trigger foo_trg_update after update on foo for each row execute
procedure a_update_trg();

regards
Pavel Stehule