| From: | Moshe Jacobson <moshe(at)neadwerx(dot)com> |
|---|---|
| To: | Igor Neyman <ineyman(at)perceptron(dot)com> |
| Cc: | pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Help with exclusion constraint |
| Date: | 2014-03-28 16:59:17 |
| Message-ID: | CAJ4CxLmQeCyxq=SHpO+ob7e5RCpYS6=we=FeyhY8AFPQ31QCvQ@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On Fri, Mar 28, 2014 at 12:21 PM, Igor Neyman <ineyman(at)perceptron(dot)com>wrote:
> For this:
> "any given value of fk_col that there is a maximum of one row with
> bool_col = true."
>
> why don't you (instead) create partial unique index:
> CREATE UNIQUE INDEX on exclusion_example(fk_col, bool_col) WHERE bool_col
> IS TRUE;
>
Ahh yes, why didn't I think of that? Thank you.
Moshe Jacobson
Manager of Systems Engineering, Nead Werx Inc. <http://www.neadwerx.com>
2323 Cumberland Parkway · Suite 201 · Atlanta, GA 30339
"Quality is not an act, it is a habit." -- Aristotle
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Moshe Jacobson | 2014-03-28 17:00:20 | Re: Help with exclusion constraint |
| Previous Message | hari.fuchs | 2014-03-28 16:45:16 | Re: Help with exclusion constraint |