Re: No serial type

From: Christian Schröder <cs(at)deriva(dot)de>
To: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
Cc: Simon Connah <simon(dot)n(dot)connah(at)btopenworld(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: No serial type
Date: 2008-11-18 23:16:19
Message-ID: 49234CC3.4030306@deriva.de
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Scott Marlowe wrote:
> Serial is a "pseudotype". It represents creating an int or bigint and
> a sequence then assigning a default value for the column and setting
> dependency in the db so the sequence will be dropped when the table
> gets dropped. If you don't want to recreate the table, you can do
> this:
>
> create table a (i int primary key, info text);
> create sequence a_i_seq;
> alter table a alter column i set default nextval('a_i_seq');
>
You could even use "create sequence a_i_seq owned by a.i". This would
cause the sequence to be dropped when the table is dropped which I think
is the default behaviour if you create a column with type serial.

Regards,
Christian

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