Re: [PATCH] psql: add \dcs to list all constraints

I wrote:
> * You might do well to use upper-case letters for add-on
> filters (that is, "N" not "n" for not-null, etc).  This isn't
> really a convention we've used elsewhere, except for the case
> of "S" for "system" in some commands.  But I think it's too
> hard to tell the base command name from the filter add-ons
> without some typographic help like that.

Or we could invert that: make the base command name "\dCN"
and then the add-on filters stay lower case.  Since we
already have, eg, "\dC", this might be less of a departure
from existing practice.

            regards, tom lane