On Sun, Mar 28, 2021, at 16:04, Tom Lane wrote:
> Maybe. I don't recall ever having seen a column with more than one FK.
> Is that a common thing? In itself it seems like a bad idea.
Yeah, that aspect seems like a complete show-stopper. We have a way
to enforce that you can't *drop* a constraint that some stored view
depends on for semantic validity. We don't have a way to say that
you can't *add* a constraint-with-certain-properties. And I don't
think it'd be very practical to do (consider race conditions, if
nothing more).
Thanks for valuable insights, I didn't think about these things.
What if the path expressions are just syntactic sugar for an INNER JOIN on the referencing -> referenced column?
If a VIEW is created using this syntax, it would be stored as INNER JOINs, similar to how SELECT * is expanded.
/Joel
