Re: Creating a column interger with default to not null

From: Thom Brown <thom(at)linux(dot)com>
To: Chris Barnes <compuguruchrisbarnes(at)hotmail(dot)com>
Cc: Postgres General Postgres General <pgsql-general(at)postgresql(dot)org>
Subject: Re: Creating a column interger with default to not null
Date: 2010-09-24 15:10:28
Message-ID: AANLkTin00roUwq3PhFQq4wYp9VhxViWXG_ZNoMMf7ji1@mail.gmail.com
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On 24 September 2010 16:05, Chris Barnes
<compuguruchrisbarnes(at)hotmail(dot)com> wrote:
>
> I am confused with what this is telling me.
> I have a table and I am trying to add a new column with constraint not null.
>
>
> What am I missing?
> Chris
>
>
> pgdb001=> alter table schema.table add COLUMN column_name integer not null;
> ERROR:  column "column_name" contains null values

What it's telling you is that the column can't contain null values,
but you're adding a new column with no default, so it will naturally
use null.

Try adding a default like:

ALTER TABLE schema.table ADD COLUMN column_name integer NOT NULL DEFAULT 0;

--
Thom Brown
Twitter: @darkixion
IRC (freenode): dark_ixion
Registered Linux user: #516935

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