Re: Add new column

Then drop and rebuild the table. Otherwise add it onto the end, which I
believe is ANSI SQL expected behavior and forget about it. Where the
column is in the table is less important than where you place it in the
select statement. The only other time I can see column placement as
being important is if it's part of the primary key, but even then I've
had no problems with adding to the end of the table.

-----Original Message-----
From: pgsql-admin-owner(at)postgresql(dot)org
[mailto:pgsql-admin-owner(at)postgresql(dot)org] On Behalf Of Rafal Kedziorski
Sent: Wednesday, July 20, 2005 4:49 AM
To: pgsql-admin(at)postgresql(dot)org
Subject: [ADMIN] Add new column

Hi,

I wan't add new column to this table:

CREATE SEQUENCE abo_product_2_user_seq;

CREATE TABLE abo_product_2_user (
abo_product_2_user_id BIGINT NOT NULL DEFAULT
NEXTVAL('abo_product_2_user_seq'),
abo_product_id SMALLINT NOT NULL,
user_id BIGINT NOT NULL,
valid_from TIMESTAMP NOT NULL,
valid_to TIMESTAMP,
debit_entry VARCHAR(12) NOT NULL,
--
PRIMARY KEY (abo_product_2_user_id),
--INDEX (abo_product_id),
--INDEX (user_id),
FOREIGN KEY (abo_product_id)
REFERENCES abo_product (abo_product_id),
FOREIGN KEY (user_id)
REFERENCES users (user_id)
);

But PostgreSQL 8.0.3 adds the new column at the end. I want add this
new column between user_id and valid_from.

Best Regards,
Rafal

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Once ago I had a similar problem.
The developers team requested about creating a new column, and the placement
was important. Thus, changing the app code was too expensive. A bad habit,
was my reply,
but as expected I had to found a solution for the problem.
Create a view and rename the table, it will add a overhead, but it sort
my problem.
(...and they didn't notice ;) )
Regards,
Guido

On 7/20/05, Goulet, Dick <DGoulet(at)vicr(dot)com> wrote:
>
> Then drop and rebuild the table. Otherwise add it onto the end, which I
> believe is ANSI SQL expected behavior and forget about it. Where the
> column is in the table is less important than where you place it in the
> select statement. The only other time I can see column placement as
> being important is if it's part of the primary key, but even then I've
> had no problems with adding to the end of the table.
>
> -----Original Message-----
> From: pgsql-admin-owner(at)postgresql(dot)org
> [mailto:pgsql-admin-owner(at)postgresql(dot)org] On Behalf Of Rafal Kedziorski
> Sent: Wednesday, July 20, 2005 4:49 AM
> To: pgsql-admin(at)postgresql(dot)org
> Subject: [ADMIN] Add new column
>
> Hi,
>
> I wan't add new column to this table:
>
> CREATE SEQUENCE abo_product_2_user_seq;
>
> CREATE TABLE abo_product_2_user (
> abo_product_2_user_id BIGINT NOT NULL DEFAULT
> NEXTVAL('abo_product_2_user_seq'),
> abo_product_id SMALLINT NOT NULL,
> user_id BIGINT NOT NULL,
> valid_from TIMESTAMP NOT NULL,
> valid_to TIMESTAMP,
> debit_entry VARCHAR(12) NOT NULL,
> --
> PRIMARY KEY (abo_product_2_user_id),
> --INDEX (abo_product_id),
> --INDEX (user_id),
> FOREIGN KEY (abo_product_id)
> REFERENCES abo_product (abo_product_id),
> FOREIGN KEY (user_id)
> REFERENCES users (user_id)
> );
>
> But PostgreSQL 8.0.3 adds the new column at the end. I want add this
> new column between user_id and valid_from.
>
>
> Best Regards,
> Rafal
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>

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"Adopting the position that you are smarter than an automatic
optimization algorithm is generally a good way to achieve less
performance, not more" - Tom Lane.