Add campsite_type_pet_cost relation to hold price of dogs in campsites
It is a separate relation, instead of having a field in campsite_type,
because not all campsite types allow dogs. I could have added a new
field to campsite_type, but then its values it would be meaningless for
campsites that do not allow dogs, and a nullable field is not a valid
solution because NULL means “unknown”, but we **do** know the price —
none.
A separate relation encodes the same information without ambiguities nor
null values, and, in fact, removed the dogs_allowed field from
campsite_type to prevent erroneous status, such as a campsite type that
allows dogs without having a cost — even if the cost is zero, it has to
be added to the new relation.
2024-02-10 05:18:30 +00:00
|
|
|
select has_function_privilege('camper.add_campsite_type(integer, integer, text, text, text, text, text, text, text, text, integer, int4range, boolean, boolean)', 'execute');
|