Re: operator exclusion constraints

From: Jeff Davis <pgsql(at)j-davis(dot)com>
To: "David E(dot) Wheeler" <david(at)kineticode(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: operator exclusion constraints
Date: 2009-11-05 18:13:30
Message-ID: 1257444810.27737.505.camel@jdavis
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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

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