Re: serial datatype changes for v7.3?

Hi,

I'm playing around with the CVS version and noticed a change from 7.2 in
regards to serial datatypes - they no longer automatically have an
index. Is this a deliberate thing? I did a search in the archives but
didn't come across mention of the change. A pointer to discussion on
this would be great.

CREATE TABLE author (
authorid SERIAL,
firstname VARCHAR(255),
surname VARCHAR(255),
dateofbirth DATE,
gender CHAR(1)
);

NOTICE: CREATE TABLE will create implicit sequence
'author_authorid_seq' for SERIAL column 'author.authorid'
CREATE TABLE

library=# \d author
Table "public.author"
Column | Type | Modifiers
-------------+------------------------+--------------------------------------------------------------
authorid | integer | not null default
nextval('public.author_authorid_seq'::text)
firstname | character varying(255) |
surname | character varying(255) |
dateofbirth | date |
gender | character(1) |

library=# \di
No relations found.

Chris <pghackers(at)designmagick(dot)com> writes:
> I'm playing around with the CVS version and noticed a change from 7.2 in
> regards to serial datatypes - they no longer automatically have an
> index. Is this a deliberate thing?

Yes. The release notes mention:

SERIAL no longer implies UNIQUE; specify explicitly if index is wanted

regards, tom lane

Tom Lane wrote:
> Chris <pghackers(at)designmagick(dot)com> writes:
> > I'm playing around with the CVS version and noticed a change from 7.2 in
> > regards to serial datatypes - they no longer automatically have an
> > index. Is this a deliberate thing?
>
> Yes. The release notes mention:
>
> SERIAL no longer implies UNIQUE; specify explicitly if index is wanted

What was the logic for this change?

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073

Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Tom Lane wrote:
>> Yes. The release notes mention:
>> SERIAL no longer implies UNIQUE; specify explicitly if index is wanted

> What was the logic for this change?

See the thread back around 17 Aug:
http://archives.postgresql.org/pgsql-hackers/2002-08/msg01336.php

regards, tom lane

OK, we just need to make that clear in the release notes. I had
forgotten about the change.

---------------------------------------------------------------------------

Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Tom Lane wrote:
> >> Yes. The release notes mention:
> >> SERIAL no longer implies UNIQUE; specify explicitly if index is wanted
>
> > What was the logic for this change?
>
> See the thread back around 17 Aug:
> http://archives.postgresql.org/pgsql-hackers/2002-08/msg01336.php
>
> regards, tom lane
>
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--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073