Re: number of referencing and referenced columns for foreign key disagree

Thank you, Tom!

Should I have the CHECK in the new table written out again as in -

On Sat, Jul 29, 2017 at 3:41 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> You have to use the separate-constraint FK syntax:
>
> CREATE TABLE words_payments (
> sid text NOT NULL,
> social integer NOT NULL ... ,
> foreign key (sid, social) references words_social
> );
>
> Or in even more pedantic detail:
>
> foreign key (sid, social) references words_social (sid, social)
>
> You'd have to use that if (sid, social) were not the PK of words_social
> but just some random unique key.
>

CREATE TABLE words_payments (
sid text NOT NULL,
social integer NOT NULL CHECK (0 < social AND social <= 64), /*
should I add this? */
trans text NOT NULL,
paid timestamptz NOT NULL,
price integer NOT NULL CHECK (price > 0),
FOREIGN KEY (sid, social) REFERENCES words_social (sid, social) ON
DELETE CASCADE
);

Regards
Alex