Creating a column interger with default to not null

On 24 September 2010 16:05, Chris Barnes
<compuguruchrisbarnes@hotmail.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;

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Thom Brown
Twitter: @darkixion
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Registered Linux user: #516935

On Friday 24 September 2010 8:05:43 am Chris Barnes 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

The error message :) The column has NULLs in it so you can not make it NOT NULL
until you get rid of them.

--
Adrian Klaver
adrian.klaver@gmail.com