R: BUG #14121: Constraint UNIQUE

From: Marco Giraldo <m(dot)giraldo(at)stt-telefonia(dot)it>
To: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
Cc: "pgsql-bugs(at)postgresql(dot)org" <pgsql-bugs(at)postgresql(dot)org>
Subject: R: BUG #14121: Constraint UNIQUE
Date: 2016-05-05 10:45:45
Message-ID: A337E1A4B98E9F49B4AE7A95D0583FB60196D9EDE9@SRV11.stt-telefonia.it
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Hi
Excuse me for the late but I have many work problem.
I hope I understand what you mean.
But I do this constraint CREATE TABLE (pippo date UNIQUE, pluto date) etc…
And I don’t can remove this restriction.

Da: David G. Johnston [mailto:david(dot)g(dot)johnston(at)gmail(dot)com]
Inviato: venerdì 29 aprile 2016 17:59
A: Marco Giraldo <m(dot)giraldo(at)stt-telefonia(dot)it>
Cc: pgsql-bugs(at)postgresql(dot)org
Oggetto: Re: [BUGS] BUG #14121: Constraint UNIQUE

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

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