On Wed, Aug 25, 2010 at 10:02 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
> On Wed, 2010-08-25 at 15:51 +0200, Markus Wanner wrote:
>> Simon,
>>
>> On 08/25/2010 11:53 AM, Simon Riggs wrote:
>> > ..we want to ensure that the PK value..
>>
>> ..or any other possibly referenced attributes?
>
> Don't think that's relevant.
>
> "referenced" meaning "by an RI constraint", which only ever refers to
> PKs in other tables.
That doesn't appear to be correct:
rhaas=# create table p (a integer primary key, b integer not null,
unique (b)); NOTICE: CREATE TABLE / PRIMARY KEY will create implicit
index "p_pkey" for table "p"
NOTICE: CREATE TABLE / UNIQUE will create implicit index "p_b_key"
for table "p"
CREATE TABLE
rhaas=# create table r (b integer not null references p (b));
CREATE TABLE
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company
