| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Markus Wanner <markus(at)bluegap(dot)ch>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Josh Berkus <josh(at)agliodbs(dot)com>, Joel Jacobson <joel(at)gluefinance(dot)com>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Magnus Hagander <magnus(at)hagander(dot)net>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Deadlock bug |
| Date: | 2010-08-25 14:15:22 |
| Message-ID: | AANLkTi=SZ9TQeFptkirQz1Oi-pmU0ynEFwCEc4rOQ6tf@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Aug 25, 2010 at 10:02 AM, Simon Riggs <simon(at)2ndquadrant(dot)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
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