From: | Michael Glaesemann <grzm(at)seespotcode(dot)net> |
---|---|
To: | Jill <jill289(at)hotmail(dot)com> |
Cc: | <pgsql-novice(at)postgresql(dot)org> |
Subject: | Re: check (constraint) on point data type? |
Date: | 2007-07-25 06:00:14 |
Message-ID: | 84E85B8A-B417-44F4-9406-F95DC5624E5E@seespotcode.net |
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Lists: | pgsql-novice |
On Jul 25, 2007, at 0:47 , Jill wrote:
> Thank you so much guys - quick, detailed, and to the point. In fact
> Michael understood right what I was trying to say (i.e., I need to
> accept values between 0 and 1 and reject anything else) - but Jim's
> suggestion is shorter (but Michael's is useful since now I know how
> to write a struc for another problem I have).
Glad it helped. Do note that using the <@ operator is inclusive,
i.e., (0,0) and (1,1) are included. The method using the
strict_during helper is exclusive, so (0,0) and (1,1) are rejected.
So the two constraints are slightly different. So make sure you use
the one which works for your situation :)
Michael Glaesemann
grzm seespotcode net
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