Re: Adding a New Composite Constraint to an Existing Table.

Dear Bhuvaneswar,

Postgresql 7.2 has implemented this feature. For
7.1, I am afraid that you should recreate the table.

M.T.

--- Bhuvan A <bhuvansql(at)yahoo(dot)com> wrote:
>
> Hi,
>
> I am using postgresql 7.1. I was unable to add a
> new PRIMARY KEY
> constraint to an existing table.
>
> i have table,
> CREATE TABLE xx
> (
> id int,
> name text,
> amount int
> );
>
> I have say some 10 records in this table, which are
> unique and not
> null (primary). Fine! Now, i am willing to have
> primary key constraint
> to all the 3 fields.
>
> I tried,
>
> bhuvan=> ALTER TABLE xx ADD primary key (id, name,
> amount);
> ERROR: ALTER TABLE / ADD CONSTRAINT is not
> implemented for that
> constraint type.
>
> Where i am wrong? How else, can i get that primary
> key constraint
> WITHOUT RECREATING that table?
>
> Hope to get some lights.
>
> Regards,
> Bhuvaneswar.
>
>
>
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