Hi Experts,
I have a use case as follows :
add constraints to the database so that no two reservations for the same viewing may refer to the same seat.
So, say I have a primary key like this in the table A:
SEAT_id integer NOT NULL GENERATED ALWAYS AS IDENTITY ( INCREMENT 1 START 1 MINVALUE 1 MAXVALUE 2147483647 CACHE 1
),
CONSTRAINT A_pkey PRIMARY KEY (SEAT_id))
WITH (
OIDS = FALSE
)
TABLESPACE pg_default;
So, basically I would like to create a SEAT_Viewing_Id.
In this case, do I create a Index Key or ?
How should I construct or rather alter my table A to accomodate this SEAT_Viewing_Id ?
Hope someone can tell me how.
Furthermore, whenever an insertion is done via WebApp, I would have to insert the Index key as well or does PostgreSQL
willhave a way to increment the Index key which is the SEAT_Viewing_Id at the same time?
Thanks & regards,
Karen