Re: [SQL] UNIQUE constraint

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Mihai Barbos" <barbos(at)moon(dot)ro>
Cc: pgsql-sql(at)hub(dot)org
Subject: Re: [SQL] UNIQUE constraint
Date: 1999-08-12 13:23:02
Message-ID: 17727.934464182@sss.pgh.pa.us
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"Mihai Barbos" <barbos(at)moon(dot)ro> writes:
> Maybe I haven't looked in the roght place but here's my problem:
> I've upgraded to 6.5 and I'm trying to use UNIQUE, something like:
> create table TEST (
> testval something UNIQUE,
> .....................,
> );
> In 6.4.2 it worked OK, but now it seems it has no effect. Is there any
> problem with UNIQUE ?

I don't see any:

create table TEST (
testval int4 UNIQUE
);
NOTICE: CREATE TABLE/UNIQUE will create implicit index 'test_testval_key' for table 'test'
CREATE
insert into test values (1);
INSERT 283276 1
insert into test values (1);
ERROR: Cannot insert a duplicate key into a unique index

You're going to have to be more specific about what problem you
are observing.

regards, tom lane

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