Re: Add new column

On 7/20/05, Rafal Kedziorski <rafcio@polonium.de> wrote:
> 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.

Column reordering is not supported.  If you really need an exact order
you have three choices:

1. Use explicit column names in SELECTs (not SELECT *).

2. CREATE VIEW with column order you desire.

3. Create a new table and populate it with data from old table, then drop
old table and rename the new one.

   Regards,
     Dawid