Re: BUG #14121: Constraint UNIQUE

On Fri, Apr 29, 2016 at 3:35 AM, <m(dot)giraldo(at)stt-telefonia(dot)it> wrote:

> The following bug has been logged on the website:
>
> Bug reference: 14121
> Logged by: Marco
> Email address: m(dot)giraldo(at)stt-telefonia(dot)it
> PostgreSQL version: 9.5.0
> Operating system: Windows 7
> Description:
>
> Hi
> I have a problem with UNIQUE constraint.
> I don't understand the difference from TYPE type UNIQUE(when I declare a
> column of the table) and ALTER TABLE table ADD CONSTRAINT column UNIQUE
> (column).
> How can I remove the UNIQUE option from TYPE declaration?
>

​You might want to try re-phrasing your question.

Specification of a constraint within the column specification of CREATE
TABLE is optional. If you don't want to do it there, don't.

​There is no difference between specifying a single-column constraint on
the column definition or as a table constraint.

I'd suggest you upgrade to 9.5.2 - and 9.5.3 in a couple of weeks.

David J.