Re: operator exclusion constraints

On Thu, 2009-11-05 at 09:25 -0800, David E. Wheeler wrote:
> CHECK is a verb; so what about a verb here?

CHECK -- verb or noun
UNIQUE -- adjective
PRIMARY KEY -- noun
FOREIGN KEY -- noun

Any of them can be called an adjective if you put it before the word
"constraint". But that's kind of circular: if we made a new type of
constraint and called it XYZ, we could say XYZ CONSTRAINT, and call XYZ
an adjective.

I'm having trouble finding a clear pattern to follow.

Regards,Jeff Davis